Air conditioning inspection report

Report contents

Executive summary

Key recommendations

Subsystems inspected

Pre-inspection records requested

Inspection certificate

Other reports for this property

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Unite Students - Bridgewater Heights 1 Great Marlborough Street MANCHESTER M1 5NR

Report number 2400-5051-3090-8404-3021

Valid until 26 September 2026

Executive summary

The following report has been prepared to discuss the findings of an air conditioning system inspection commissioned by Unite Students on a property for which they own/occupy. The subject of this report is Unite Students - Bridgewater Heights, Unite Students - Bridgewater Heights, 1 Great Marlborough Street, Manchester M1 5NR.

The client is advised that in addition to the mandatory compliant report, an additional energy report supplement and access to an online air conditioning energy portal has been provided; the report supplement contains a full external asset list and lots of useful energy data that the compliant air conditioning report does not have. The online portal also permits customer interaction with a "data interrogation export to excel" feature and an F-Gas Logbook facility. The software has been created to give building owners / operators a greater understanding of the costs involved with operating their air conditioning systems. It is believed that by providing informative air conditioning energy data with actual site-specific calculations will empower system owners to make the most informed decisions possible with regards to the operation of their installed systems.

Building

This Ibis Hotel site is a 34-storey building which is located on Great Marlborough Street, Manchester and is predominately of brick/glass in construction. The windows installed are double-glazed. There is no information available on the fabric or construction of the building; it is assumed that the cavity walls are insulated. The building is used as student accommodation with Bedrooms, offices and a Ground Floor Reception.

Based upon some basic site measurements, the building comprises a net internal conditioned area of approximately 11,100m2.

The building occupancy is for approximately 164.5 hours per week and the maximum number of occupants expected within the conditioned areas is in the region of 1,200 persons.

The air conditioning equipment is maintained by an external refrigeration contractor, Mitie, who carry out 1 maintenance visit per annum. The chiller and AHU are maintained by another 3rd party yet to be instructed.

The combined cooling duty supplied by the air conditioning is 701.7kW. Based on the aforementioned conditioned area of 11,100m2, this equates to an average cooling load density of 63.2W/m2. Based on observations made during the inspection it is thought that 80W/m2 would be an appropriate average cooling load density for the air conditioned areas of this building.

Sampling

During the assessment 4 of 4 cooling plants and 1 of 1 AHUs/HRUs were selected for a more detailed inspection in-line with the sampling approach outlined in the CIBSE TM44 guidelines:

TM44 (2.1.5.2) states that cooling systems can be sampled to give an overall view of the equipment on site, as it is always not cost effective to inspect every single system onsite. For central Air Handling Units (AHU's) a minimum of ten units or 30%, whichever number is greater shall be inspected. If there are fewer than ten units then they all shall be inspected. A 10% sample of the total number of DX split units must be inspected with a minimum of three which represents the different makes models and ages of the equipment, with an equal number of the corresponding indoor units. Where there are terminal units for the centralised systems on-site a 2% sample of the total number of terminal units must be inspected, with a minimum of five units. For large systems where consistent conditions are found a maximum of twenty units may be applied.

The following sub systems were inspected in accordance with CLG guidance to produce this report:

VOL001 SYS001: 1 Climaveneta Air Cooled Chiller System Serving Bedrooms and Common Areas

VOL001 SYS002: 1 Toshiba Single Split System Serving 20th Floor Plant Room

VOL001 SYS003: 1 Toshiba Single Split System Serving 11th Floor Plant Room

VOL001 SYS004: 1 Toshiba Single Split System Serving Coms Room

The following systems were noted as being installed:

1 Climaveneta Air Cooled Chiller System

3 Toshiba Single Split Systems

1 AHU (Air Handling Unit)

There are 3 Packaged split systems represented by 1 manufacturer, 1 Chiller and 1 Air Handling Unit serving this site. Installed at this site are 3 Split Systems which supply conditioned air to the Coms Room, 11th floor and 20th floor plant rooms via 3 wall-mounted terminal units. The cooling systems comprises of the evaporator unit positioned in the served areas with the condenser units located on the 15th Floor Roof and the Mezzanine plant Room.

Providing cooling to the bedrooms and common areas is a Climaveneta Chiller which serves 552 4-pipe fan coil units. The fan coil units are located within the ceiling voids of the bedrooms and common areas. Local stats control the fan coil unit which are wall-mounted within the space.

The condenser unit contains the compressor, heat rejection fan heat exchange coil and control circuits to regulate the operation of the system. The condenser was found to be in a good condition at the time of the inspection with all components operational and the heat exchange coil clear of any debris and clean with no sign of refrigerant leak.

Terminal Units

The terminal units are wall-mounted and fan coil units which delivers the conditioned air directly into the space. All the terminal units appear to be free from tampering of the delivery airflow louvers.

Control System

All these systems are controlled using standard manufacturers hard wired and infrared controllers for the packaged systems and digital stats for the FCU's A central BMS controls the chiller and AHU with enable and alarm functions. Time controls are set and as expected in line with occupancy.

These packaged systems do not benefit from any form of monitoring. Consider installing a metering system to monitor and record the energy consumption and operational hours. This data can then be analysed by the maintenance team to ensure the energy consumption does not exceed expected norms.

Ventilation

Mechanical ventilation is provided by 1 AHU for the common areas only.

The AHUs serve the following areas:

AHU1 - Common Areas

The inspected AHUs have a total air flow rate of 5.0m3/s. Based on a CIBSE rule of thumb of 10l/s per person, if the fresh air dampers were open 100% there would be enough fresh air supplied by these AHUs for 500 persons. The above mentioned air flow rate should be able to provide an adequate number of air changes rates per hour for a room volume of 3000m3 or assuming an average of 3m high ceiling this air change rate would be suitable for an area of 1000m2. For further details refer to Table 13 - Mechanical Ventilation Air flow Capacity of the 'Advanced Energy Report'.

The SFP (Specific Fan Power) has been calculated and tabulated within the AHU section of this report, it has been calculated that the AHUs have a combined average SFP of 1.12kW/m3/s. Individually the AHUs appear to have SFPs lower than the recommended industry guidelines, which indicates when these AHUs are at full power, the air flow rate is efficient when compared to the fan motor power that delivers the air. For further information refer to Table 14 - AHU (Specific Fan Power) SFP.

Documentation

All documentation provided by the service contractor was found to be up to date and correct.

Maintenance

The air conditioning systems are maintained annually. The cooling systems at this site appear to have received a good level of planned maintenance which is in line with industry standards. It is important that this level of maintenance is carried forward in the future as poorly maintained systems will have reduced efficiency and increased energy consumption.

Process Cooling

N/A

Observations

The types of refrigerant used in the air conditioning systems include: R134a (1 system, 330.00kg) and R410A (3 systems, 3.10kg). Under current legislation; 1 of the system require a 6 monthly F-Gas/ODS Log Book as the refrigerant charges within these systems has an equivalent CO2 GWP (Global Warming Potential) of between 50 to 500 tonnes. 3 of the systems do not require an F-Gas/ODS Log Book but it is best practise to maintain a voluntary F-Gas/ODS Log Book.

Within individual areas, there are systems which appear to be oversized for the areas they serve, and this has been tabulated within a sizing table of the 'Advanced Energy Report'. However as all of these systems can operate at part load this does not generally give cause for concern. For further details refer to Table 7 - Calculated Room/System Cooling Load within the 'Advanced Energy Report'.

At full power the installed air conditioning has a combined electrical rated input power of 228.6kW, however when this is reduced to reflect part loading capabilities, it is estimated that the air conditioning would have an average power input of 94.1kW which equates to 8.5W/m2 of conditioned space. This figure is not expected to be a reflection of energy usage but is intended to help the client with a benchmark to compare with other facilities.

As previously mentioned, the combined amount of cooling duty supplied by the split and packaged DX systems is 15.0kW. Based on manufacturer's data the total amount of electrical power consumed by all of these systems at full load is 4.9kW which translates to an average building EER of 3.1 this translates to an average system energy label "B" which shows that overall the systems have good energy ratings.

The schedules on the sampled controllers were inspected and the following operational times were noted:

Comfort Cooling: 00:00 - 23:30 Monday - Sunday (164.5 hours per week)

Process Cooling: No schedules implemented

Mechanical Ventilation: (0 hours per week)

The site inspection was carried during the Covid-19 pandemic and as such limited pictures could be taken whilst on site to reduce the time on site.

Key recommendations

Efficiency

To optimise air flow ensure all AHU filters are high efficiency (Low energy) "A" rated filters.

Consider the savings that could be made by upgrading the current belt driven motors within the AHUs to direct drive speed controlled EC motors.

The inspected AHUs appear to have SFPs higher than the recommended industry guidelines, which indicates when these AHUs are at full power, the air flow rate is inefficient when compared to the fan motor power that delivers the air. Consider the savings that could be made by upgrading the current belt driven motors within the AHUs to direct drive speed controlled EC motors.

Consider the savings that could be made to the heating systems by adding the capability of heat recovery to the AHUs.

Consider sub-metering the individual items of HVAC plant on site and then record the energy consumption figures to enable areas of excessive consumption to be identified.

Maintenance

The cooling systems at this site appear to have received a good level of planned maintenance with no cause for concern.

Controls

It is recommended that a seasonal set-points strategy is introduced to maximise system efficiency. Winter set-points should be 19 degC in heating only mode. Summer set-points should be 24 degC in cooling only mode. Spring / Autumn set-points should be 21 degC - 22 degC in auto mode.

Consider increasing the server room set point from 21 degC to, if possible, 27 degC. This may be done in small increments to ensure equipment stability.

Management

The client should be aware of the UK Government Covid-19 advice. The general advice is to supply as much fresh air into a building as possible. Mechanical ventilation systems will provide adequate ventilation if they are set to maximise fresh air and minimise recirculation. The full guidance can be found on the Government web page: https://www.hse.gov.uk/coronavirus/equipment-and-machinery/air-conditioning-and-ventilation/improve-mechanical-ventilation.htm

Consider placing notices alongside the local system controllers to advise occupants on the method of control for efficient operation of the AC system.

Subsystems inspected

VOL001/SYS001 Bedrooms and Common Areas

Volume definitions: VOL001 Unite Students
Description: 1 Climaveneta Air Cooled Chiller System Serving Bedrooms and Common Areas
Effective rated cooling output: 687 kW
Area served: Bedrooms and Common Areas
Inspection date: 27 September 2021
Cooling plant count: 1
AHU count: 1
Terminal units count: 552
Sub system controls count: 553

VOL001/SYS002 20th Floor Plant Room

Volume definitions: VOL001 Unite Students
Description: 1 Toshiba Single Split System Serving 20th Floor Plant Room
Effective rated cooling output: 5 kW
Area served: 20th Floor Plant Room
Inspection date: 27 September 2021
Cooling plant count: 1
AHU count: 0
Terminal units count: 1
Sub system controls count: 1

VOL001/SYS003 11th Floor Plant Room

Volume definitions: VOL001 Unite Students
Description: 1 Toshiba Single Split System Serving 11th Floor Plant Room
Effective rated cooling output: 5 kW
Area served: 11th Floor Plant Room
Inspection date: 27 September 2021
Cooling plant count: 1
AHU count: 0
Terminal units count: 1
Sub system controls count: 1

VOL001/SYS004 Coms Room

Volume definitions: VOL001 Unite Students
Description: 1 Toshiba Single Split System Serving Coms Room
Effective rated cooling output: 4 kW
Area served: Coms Room
Inspection date: 27 September 2021
Cooling plant count: 1
AHU count: 0
Terminal units count: 1
Sub system controls count: 1

Pre-inspection records requested

Essential records

These records were reviewed:

Itemised list of installed air conditioning and refrigeration plant including product makes, models and identification numbers
Cooling capacities, with locations of the indoor and outdoor components of each plant
Description of system control zones, with schematic drawings
Description of method of control of temperature
Description of method of control of periods of operation.
Floor plans and schematics of air conditioning systems.

Desirable records

These records were not available:

Reports from earlier inspections of air conditioning systems, and for the generation of an energy performance certificate
Records of maintenance operations carried out on refrigeration systems, including cleaning indoor and outdoor heat exchangers, refrigerant leakage tests, repairs to refrigeration components replenishing with refrigerant
Records of maintenance operations carried out on air delivery systems, including filter cleaning and changing, and cleaning of heat exchangers
Records of calibration and maintenance operations carried out on control systems and sensors, or BMS systems and sensors
Records of sub-metered air conditioning plant use or energy consumption
For relevant air supply and extract systems, commissioning results of measured absorbed power at normal air delivery and extract rates, and commissioning results for normal delivered delivery and extract air flow rates (or independently calculated specific fan power for the systems)

Optional records

These records were not available:

An estimate of the design cooling load for each system (if available). Otherwise, a brief description of the occupation of the cooled spaces, and of power consuming equipment normally used in those spaces
Records of any issues or complaints that have been raised concerning the indoor comfort conditions achieved in the treated spaces
Where a BMS is used the manager should arrange for a short statement to be provided describing its capabilities, the plant it is connected to control, the set points for the control of temperature, the frequency with which it is maintained, and the date of the last inspection and maintenance
Where a monitoring station, or remote monitoring facility, is used to continually observe the performance of equipment such as chillers, the manager should arrange for a statement to be provided describing the parameters monitored, and a statement reviewing the operating efficiency of the equipment

Cooling plants

Cooling plant 1

Unit Identifier: VOL001/SYS001 Bedrooms and Common Areas
Component Identifier: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller

Equipment Inspected

Rated Cooling Capacity (kW): 687
Description (type/details): Air Cooled Chiller
Location of Cooling Plant: Mezzanine Plant Room
Manufacturer: Climaveneta
Model/Reference: FOCS-ME2402
Refrigerant Charge (kg): 330
Refrigerant Type: 254
Serial Number: 32032759
Year Plant Installed: 2012
Areas/Systems Served: Bedrooms and Common Areas

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the cooling plant/system:

There were no notable system discrepancies.

Approved sections

CS2.1 Is the refrigeration plant operational?

Yes

The refrigeration plant was found to be operational

CS2.2/a Is the area around the refrigeration plant clear of obstructions & debris?

Yes

This cooling plant is located in an area that provides sufficient airflow to allow for the efficient operation of the system. The area around the cooling plant is clear of obstructions and any potential blockages to airflow.

CS2.2/b Is the general condition of refrigeration and any associated central plant in good order?

Yes

This cooling plant was found to be in a good condition.

CS2.2/c Is the condenser placed clear from warm air discharge louvres?

Yes

This cooling plant is positioned adequately in relation to any adjacent discharge louvers and there is no possibility of any warm air re-circulation.

CS2.3/a Are compressors operational or can they be brought into operation?

Yes

The compressor/s were found to be operational during the inspection.

CS3.1/a Is the heat rejection plant operational?

Yes

The heat rejection plant was found to be operational

CS3.1/b Are condenser heat exchangers undamaged/ un-corroded and clean?

Yes

The coils on this cooling plant were found to be in a good undamaged condition. The cooling plant coil was free from any build-up of dust or dirt.

CS3.2/a Is the area around the heat rejection plant clear of obstructions & debris?

Yes

There are no obstructions to the heat rejection process.

CS3.2/b Is the condenser free of any possibility of air recirculation?

Yes

The unit is positioned adequately and there is no potential for the re-circulation of air from itself or from any adjacent source.

CS4.1 Is the insulation on circulation pipe work well fitted and in good order?

Yes

The visible lengths of the external refrigerant pipe work were found to be in a good condition with insulation intact in all inspected areas.

Appropriately Sized Cooling Plant

Installed Cooling Capacity (kW): 686.70
Occupant Density (m2/person): 10.04
Total Floor Area served by this plant(m2): 11040
Total Occupants served by this plant: 1100
Maximum Instantaneous Heat Gain (W/m2): 75
The Installed Size is Deemed: As expected

Notes and Recommendations

The current version of the Building Regulations Approved Document Part L documentation provides guidance suggesting that the plant should not be more than 20% oversized. This should be adopted as means of comparison to stay in line with current standards.

The Maximum Instantaneous Heat Gain figure has been based on the '5th edition' BSRIA or CIBSE rule of thumb guides however; visual observations that may affect this, such as window sizes, ceiling heights, occupant densities and any other observed or abnormal heat loads have also been considered.

The Installed Cooling Capacity figure includes all systems within the same area.

Based on the aforementioned 'Maximum Instantaneous Heat Gains' (75W/m2) it is estimated that this area requires approximately 828.0kW of cooling. (11040m2 x 75W/m2 / 1000 = 828.0kW)

The calculated comfort cooling load suggests that the systems that serve this area are correctly sized for the application. It should be noted the general scope of this inspection does not include a detailed building cooling load profile and this would need to be carried out before making any judgement on the sizing suitability of the cooling equipment. The estimated cooling load is based on a 'rule of thumb' and may not reflect the actual cooling load. It is normally acceptable for a margin of error of +/-20% as per the latest guidelines from CIBSE.

Refrigeration

Pre Compressor(°C): 9
Post Compressor(°C): 11
Ambient(°C): 18
The Temperature is Deemed: As expected
Refrigerant Type: 254
Assess the refrigeration compressor(s) and the method of refrigeration capacity control: System Input Power = 223.7kW System EER (Energy Efficiency Ratio) = 3.1 Energy Label Class = B The system is installed with inverter technology, this is more efficient than fixed speed systems, as the inverter will modulate the speed of the compressor to match the cooling load requirements.

Are there any signs of a refrigerant leak?

Montreal/ODS/F-Gas controlled?

Yes

The system is installed with 330.0kg of R134a and as such it has a GWP (Global Warming Potential) which is equivalent to 471.9 tonnes of CO2.

As the system has a GWP equivalent to between 50 and 500 tonnes of CO2 it is a legal obligation to keep an F-Gas log book on this system and have it checked for leaks on a six monthly basis.

Notes and Recommendations

The chilled water "flow" temperature (leaving evaporator) as noted at the BMS/On-board controller has been used to represent the pre-compressor temperature.

The chilled water "return temperature" as noted at the BMS/On-board controller has been used to represent the post-compressor temperature.

Temperature samples taken from this cooling plant indicate it was operating correctly.

Regular Maintenance

Is there evidence of regular maintenance?

Yes

Planned Preventative Maintenance (PPM) documentation is up to date and was reviewed as part of this inspection.

Is the maintenance undertaken by suitably competent people and in accordance to industry guidelines?

Yes

Maintenance is carried out on the systems by Refcom registered contractors ACME AC/FM Firm. There are 1 maintenance visits per annum.

Metering Comparison to appropriate energy benchmarks

Is metering installed to enable monitoring of energy consumption of refrigeration plant?

Consideration should be given to the savings that could be made by installing meters to monitor the energy consumption of individual items of plant. By monitoring and recording these energy readings at regular intervals the client will be provided with definitive data that will allow them to identify areas where energy consumption is excessive and where fiscal & energy savings could be made.

Is the refrigeration plant connected to a BEMS that can provide out of range alarms?

This system is not linked to a BMS or centralised controller.

Are there any records of air conditioning plant usage or sub-metered energy consumption with expected hours of use per year for the plant?

N/A Details of any sub-metering has been answered in previous fields.

Is the energy consumption or hours of use excessive?

For details on hours of operation of this system refer to the section in the relevant linked system controller

Water Cooled Chillers (Cooling Towers & Evaporative Condensers)

Is the water flow through cooling towers or evaporative coolers even and efficient, and there is no loss of water?

Not applicable, no water cooling tower or evaporative coolers are linked to this system.

Is there a management regime in place to ensure that water is regularly checked and treated to ensure that there is no Legionella risk?

Not applicable, it is not necessary to put a regime in place as the HVAC system does not have a Legionella risk.

Humidity Control

Is there separate equipment installed for humidity control?

There is no humidity control equipment linked to this system.

Cooling plant 2

Unit Identifier: VOL001/SYS002 20th Floor Plant Room
Component Identifier: VOL001/SYS002/CP1 Toshiba-Single Split-20th Floor Plant Room-Split AC 1

Equipment Inspected

Rated Cooling Capacity (kW): 5
Description (type/details): Single Split
Location of Cooling Plant: 15th Floor Roof
Manufacturer: Toshiba
Model/Reference: RAV-SM563AT-E
Refrigerant Charge (kg): 1
Refrigerant Type: 273
Serial Number: 203P0244
Year Plant Installed: 2012
Areas/Systems Served: 20th Floor Plant Room

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the cooling plant/system:

There were no notable system discrepancies.

Approved sections

CS2.1 Is the refrigeration plant operational?

Yes

The refrigeration plant was found to be operational

CS2.2/a Is the area around the refrigeration plant clear of obstructions & debris?

Yes

CS2.2/b Is the general condition of refrigeration and any associated central plant in good order?

Yes

This cooling plant was found to be in a good condition.

CS2.2/c Is the condenser placed clear from warm air discharge louvres?

Yes

This cooling plant is positioned adequately in relation to any adjacent discharge louvers and there is no possibility of any warm air re-circulation.

CS2.3/a Are compressors operational or can they be brought into operation?

Yes

The compressor/s were found to be operational during the inspection.

CS3.1/a Is the heat rejection plant operational?

Yes

The heat rejection plant was found to be operational

CS3.1/b Are condenser heat exchangers undamaged/ un-corroded and clean?

Yes

The coils on this cooling plant were found to be in a good undamaged condition. The cooling plant coil was free from any build-up of dust or dirt.

CS3.2/a Is the area around the heat rejection plant clear of obstructions & debris?

Yes

There are no obstructions to the heat rejection process.

CS3.2/b Is the condenser free of any possibility of air recirculation?

Yes

The unit is positioned adequately and there is no potential for the re-circulation of air from itself or from any adjacent source.

CS4.1 Is the insulation on circulation pipe work well fitted and in good order?

Yes

The visible lengths of the external refrigerant pipe work were found to be in a good condition with insulation intact in all inspected areas.

Appropriately Sized Cooling Plant

Installed Cooling Capacity (kW): 5.30
Occupant Density (m2/person): 20.00
Total Floor Area served by this plant(m2): 20
Total Occupants served by this plant: 0
Maximum Instantaneous Heat Gain (W/m2): 300
The Installed Size is Deemed: As expected

Notes and Recommendations

The Installed Cooling Capacity figure includes all systems within the same area.

Based on the aforementioned 'Maximum Instantaneous Heat Gains' (300W/m2) it is estimated that this area requires approximately 6.0kW of cooling. (20m2 x 300W/m2 / 1000 = 6.0kW)

The calculated comfort cooling load suggests that the systems that serve this area are correctly sized for the application. As this system is for cooling equipment and not for comfort cooling, heat gains are equipment specific. Although a rule of thumb figure of between 400 - 600 W/m2 is often used as a guide for calculating the required cooling within a server room this may not be applicable, and a more detailed survey of the heat generating equipment will be required to establish the actual heat gains in the area. It should be noted the general scope of this inspection does not include a detailed building cooling load profile and this would need to be carried out before making any judgement on the sizing suitability of the cooling equipment. The estimated cooling load is based on a 'rule of thumb' and may not reflect the actual cooling load. It is normally acceptable for a margin of error of +/-20% as per the latest guidelines from CIBSE.

Refrigeration

Pre Compressor(°C): 9
Post Compressor(°C): 21
Ambient(°C): 18
The Temperature is Deemed: As expected
Refrigerant Type: 273
Assess the refrigeration compressor(s) and the method of refrigeration capacity control: System Input Power = 1.7kW System EER (Energy Efficiency Ratio) = 3.2 Energy Label Class = A The system is installed with inverter technology, this is more efficient than fixed speed systems, as the inverter will modulate the speed of the compressor to match the cooling load requirements.

Are there any signs of a refrigerant leak?

Montreal/ODS/F-Gas controlled?

F-Gas Log Book Not Required The system is installed with 1.0kg of R410A and as such it has a GWP (Global Warming Potential) which is equivalent to 2.1 tonnes of CO2.

As the system has a GWP equivalent to less than 5 tonnes of CO2 there is no legal obligation to keep an F-Gas log book on this system. However for best practise and to aid with service work it is always recommended that a voluntary log book is kept for all systems which contain refrigerant.

Notes and Recommendations

The "air off" temperature recorded at the internal unit has been used to represent the pre-compressor temperature. The system was operated in cooling mode.

The "air on" temperature recorded at the internal unit has been used to represent the post compressor temperature.

Temperature samples taken from this cooling plant indicate it was operating correctly.

Regular Maintenance

Is there evidence of regular maintenance?

Yes

Planned Preventative Maintenance (PPM) documentation is up to date and was reviewed as part of this inspection.

Is the maintenance undertaken by suitably competent people and in accordance to industry guidelines?

Yes

Maintenance is carried out on the systems by Refcom registered contractors ACME AC/FM Firm. There are 1 maintenance visits per annum.

Metering Comparison to appropriate energy benchmarks

Is metering installed to enable monitoring of energy consumption of refrigeration plant?

Is the refrigeration plant connected to a BEMS that can provide out of range alarms?

This system is not linked to a BMS or centralised controller.

Are there any records of air conditioning plant usage or sub-metered energy consumption with expected hours of use per year for the plant?

N/A Details of any sub-metering has been answered in previous fields.

Is the energy consumption or hours of use excessive?

For details on hours of operation of this system refer to the section in the relevant linked system controller

Water Cooled Chillers (Cooling Towers & Evaporative Condensers)

Is the water flow through cooling towers or evaporative coolers even and efficient, and there is no loss of water?

Not applicable, no water cooling tower or evaporative coolers are linked to this system.

Is there a management regime in place to ensure that water is regularly checked and treated to ensure that there is no Legionella risk?

Not applicable, it is not necessary to put a regime in place as the HVAC system does not have a Legionella risk.

Humidity Control

Is there separate equipment installed for humidity control?

There is no humidity control equipment linked to this system.

Cooling plant 3

Unit Identifier: VOL001/SYS003 11th Floor Plant Room
Component Identifier: VOL001/SYS003/CP1 Toshiba-Single Split-11th Floor Plant Room-Split AC 2

Equipment Inspected

Rated Cooling Capacity (kW): 5
Description (type/details): Single Split
Location of Cooling Plant: 15th Floor Roof
Manufacturer: Toshiba
Model/Reference: RAV-SM563AT-E
Refrigerant Charge (kg): 1
Refrigerant Type: 273
Serial Number: 203P1052
Year Plant Installed: 2012
Areas/Systems Served: 11th Floor Plant Room

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the cooling plant/system:

There were no notable system discrepancies.

Approved sections

CS2.1 Is the refrigeration plant operational?

Yes

The refrigeration plant was found to be operational

CS2.2/a Is the area around the refrigeration plant clear of obstructions & debris?

Yes

CS2.2/b Is the general condition of refrigeration and any associated central plant in good order?

Yes

This cooling plant was found to be in a good condition.

CS2.2/c Is the condenser placed clear from warm air discharge louvres?

Yes

This cooling plant is positioned adequately in relation to any adjacent discharge louvers and there is no possibility of any warm air re-circulation.

CS2.3/a Are compressors operational or can they be brought into operation?

Yes

The compressor/s were found to be operational during the inspection.

CS3.1/a Is the heat rejection plant operational?

Yes

The heat rejection plant was found to be operational

CS3.1/b Are condenser heat exchangers undamaged/ un-corroded and clean?

Yes

The coils on this cooling plant were found to be in a good undamaged condition. The cooling plant coil was free from any build-up of dust or dirt.

CS3.2/a Is the area around the heat rejection plant clear of obstructions & debris?

Yes

There are no obstructions to the heat rejection process.

CS3.2/b Is the condenser free of any possibility of air recirculation?

Yes

The unit is positioned adequately and there is no potential for the re-circulation of air from itself or from any adjacent source.

CS4.1 Is the insulation on circulation pipe work well fitted and in good order?

Yes

The visible lengths of the external refrigerant pipe work were found to be in a good condition with insulation intact in all inspected areas.

Appropriately Sized Cooling Plant

Installed Cooling Capacity (kW): 5.30
Occupant Density (m2/person): 20.00
Total Floor Area served by this plant(m2): 20
Total Occupants served by this plant: 0
Maximum Instantaneous Heat Gain (W/m2): 300
The Installed Size is Deemed: As expected

Notes and Recommendations

The Installed Cooling Capacity figure includes all systems within the same area.

Based on the aforementioned 'Maximum Instantaneous Heat Gains' (300W/m2) it is estimated that this area requires approximately 6.0kW of cooling. (20m2 x 300W/m2 / 1000 = 6.0kW)

Refrigeration

Pre Compressor(°C): 11
Post Compressor(°C): 21
Ambient(°C): 18
The Temperature is Deemed: As expected
Refrigerant Type: 273
Assess the refrigeration compressor(s) and the method of refrigeration capacity control: System Input Power = 1.7kW System EER (Energy Efficiency Ratio) = 3.2 Energy Label Class = A The system is installed with inverter technology, this is more efficient than fixed speed systems, as the inverter will modulate the speed of the compressor to match the cooling load requirements.

Are there any signs of a refrigerant leak?

Montreal/ODS/F-Gas controlled?

F-Gas Log Book Not Required The system is installed with 1.0kg of R410A and as such it has a GWP (Global Warming Potential) which is equivalent to 2.1 tonnes of CO2.

Notes and Recommendations

The "air off" temperature recorded at the internal unit has been used to represent the pre-compressor temperature. The system was operated in cooling mode.

The "air on" temperature recorded at the internal unit has been used to represent the post compressor temperature.

Temperature samples taken from this cooling plant indicate it was operating correctly.

Regular Maintenance

Is there evidence of regular maintenance?

Yes

Planned Preventative Maintenance (PPM) documentation is up to date and was reviewed as part of this inspection.

Is the maintenance undertaken by suitably competent people and in accordance to industry guidelines?

Yes

Maintenance is carried out on the systems by Refcom registered contractors ACME AC/FM Firm. There are 1 maintenance visits per annum.

Metering Comparison to appropriate energy benchmarks

Is metering installed to enable monitoring of energy consumption of refrigeration plant?

Is the refrigeration plant connected to a BEMS that can provide out of range alarms?

This system is not linked to a BMS or centralised controller.

Are there any records of air conditioning plant usage or sub-metered energy consumption with expected hours of use per year for the plant?

N/A Details of any sub-metering has been answered in previous fields.

Is the energy consumption or hours of use excessive?

For details on hours of operation of this system refer to the section in the relevant linked system controller

Water Cooled Chillers (Cooling Towers & Evaporative Condensers)

Is the water flow through cooling towers or evaporative coolers even and efficient, and there is no loss of water?

Not applicable, no water cooling tower or evaporative coolers are linked to this system.

Is there a management regime in place to ensure that water is regularly checked and treated to ensure that there is no Legionella risk?

Not applicable, it is not necessary to put a regime in place as the HVAC system does not have a Legionella risk.

Humidity Control

Is there separate equipment installed for humidity control?

There is no humidity control equipment linked to this system.

Cooling plant 4

Unit Identifier: VOL001/SYS004 Coms Room
Component Identifier: VOL001/SYS004/CP1 Toshiba-Single Split-Coms Room-Split AC 3

Equipment Inspected

Rated Cooling Capacity (kW): 4
Description (type/details): Single Split
Location of Cooling Plant: Mezzanine Plant Room
Manufacturer: Toshiba
Model/Reference: RAS-187SAV
Refrigerant Charge (kg): 1
Refrigerant Type: 273
Serial Number: 1003001579
Year Plant Installed: 2012
Areas/Systems Served: Coms Room

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the cooling plant/system:

There were no notable system discrepancies.

Approved sections

CS2.1 Is the refrigeration plant operational?

Yes

The refrigeration plant was found to be operational

CS2.2/a Is the area around the refrigeration plant clear of obstructions & debris?

Yes

CS2.2/b Is the general condition of refrigeration and any associated central plant in good order?

Yes

This cooling plant was found to be in a good condition.

CS2.2/c Is the condenser placed clear from warm air discharge louvres?

Yes

This cooling plant is positioned adequately in relation to any adjacent discharge louvers and there is no possibility of any warm air re-circulation.

CS2.3/a Are compressors operational or can they be brought into operation?

Yes

The compressor/s were found to be operational during the inspection.

CS3.1/a Is the heat rejection plant operational?

Yes

The heat rejection plant was found to be operational

CS3.1/b Are condenser heat exchangers undamaged/ un-corroded and clean?

Yes

The coils on this cooling plant were found to be in a good undamaged condition. The cooling plant coil was free from any build-up of dust or dirt.

CS3.2/a Is the area around the heat rejection plant clear of obstructions & debris?

Yes

There are no obstructions to the heat rejection process.

CS3.2/b Is the condenser free of any possibility of air recirculation?

Yes

The unit is positioned adequately and there is no potential for the re-circulation of air from itself or from any adjacent source.

CS4.1 Is the insulation on circulation pipe work well fitted and in good order?

Yes

The visible lengths of the external refrigerant pipe work were found to be in a good condition with insulation intact in all inspected areas.

Appropriately Sized Cooling Plant

Installed Cooling Capacity (kW): 4.40
Occupant Density (m2/person): 20.00
Total Floor Area served by this plant(m2): 20
Total Occupants served by this plant: 0
Maximum Instantaneous Heat Gain (W/m2): 300
The Installed Size is Deemed: Less than expected

Notes and Recommendations

The Installed Cooling Capacity figure includes all systems within the same area.

Based on the aforementioned 'Maximum Instantaneous Heat Gains' (300W/m2) it is estimated that this area requires approximately 6.0kW of cooling. (20m2 x 300W/m2 / 1000 = 6.0kW)

The calculated comfort cooling load suggests that the systems that serve this area are under sized for the application. Undersized systems do not usually result in excess energy usage however continual operation could lead to wear and tear and early termination of the unit. As this system is for cooling equipment and not for comfort cooling, heat gains are equipment specific. Although a rule of thumb figure of between 400 - 600 W/m2 is often used as a guide for calculating the required cooling within a server room this may not be applicable, and a more detailed survey of the heat generating equipment will be required to establish the actual heat gains in the area. It should be noted the general scope of this inspection does not include a detailed building cooling load profile and this would need to be carried out before making any judgement on the sizing suitability of the cooling equipment. The estimated cooling load is based on a 'rule of thumb' and may not reflect the actual cooling load. It is normally acceptable for a margin of error of +/-20% as per the latest guidelines from CIBSE.

Refrigeration

Pre Compressor(°C): 12
Post Compressor(°C): 21
Ambient(°C): 18
The Temperature is Deemed: As expected
Refrigerant Type: 273
Assess the refrigeration compressor(s) and the method of refrigeration capacity control: System Input Power = 1.6kW System EER (Energy Efficiency Ratio) = 2.8 Energy Label Class = C The system is installed with inverter technology, this is more efficient than fixed speed systems, as the inverter will modulate the speed of the compressor to match the cooling load requirements.

Are there any signs of a refrigerant leak?

Montreal/ODS/F-Gas controlled?

F-Gas Log Book Not Required The system is installed with 1.1kg of R410A and as such it has a GWP (Global Warming Potential) which is equivalent to 2.3 tonnes of CO2.

Notes and Recommendations

The "air off" temperature recorded at the internal unit has been used to represent the pre-compressor temperature. The system was operated in cooling mode.

The "air on" temperature recorded at the internal unit has been used to represent the post compressor temperature.

Temperature samples taken from this cooling plant indicate it was operating correctly.

Regular Maintenance

Is there evidence of regular maintenance?

Yes

Planned Preventative Maintenance (PPM) documentation is up to date and was reviewed as part of this inspection.

Is the maintenance undertaken by suitably competent people and in accordance to industry guidelines?

Yes

Maintenance is carried out on the systems by Refcom registered contractors ACME AC/FM Firm. There are 1 maintenance visits per annum.

Metering Comparison to appropriate energy benchmarks

Is metering installed to enable monitoring of energy consumption of refrigeration plant?

Is the refrigeration plant connected to a BEMS that can provide out of range alarms?

This system is not linked to a BMS or centralised controller.

Are there any records of air conditioning plant usage or sub-metered energy consumption with expected hours of use per year for the plant?

N/A Details of any sub-metering has been answered in previous fields.

Is the energy consumption or hours of use excessive?

For details on hours of operation of this system refer to the section in the relevant linked system controller

Water Cooled Chillers (Cooling Towers & Evaporative Condensers)

Is the water flow through cooling towers or evaporative coolers even and efficient, and there is no loss of water?

Not applicable, no water cooling tower or evaporative coolers are linked to this system.

Is there a management regime in place to ensure that water is regularly checked and treated to ensure that there is no Legionella risk?

Not applicable, it is not necessary to put a regime in place as the HVAC system does not have a Legionella risk.

Humidity Control

Is there separate equipment installed for humidity control?

There is no humidity control equipment linked to this system.

Air handling systems

Air handling system 1

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/AHU1 VES-Common Areas-AHU 1
Areas or systems served: Common Areas
Discrepancies noted: There were no notable system discrepancies.
Location of plant: Mezzanine Plant Room
Manufacturer: VES
Systems served from cooling plant: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Year installed: 2012

CS1.5 Specific fan power

Estimate the specific fan power (SFP) of air movement systems.

Are air flow rates and system pressures available from commissioning data?

The system has an air flow rate of circa 5.0m3/s and a fan motor capacity of 4.0kW supply and 4.0kW extract. This would mean the system has an SFP of 1.12 which is lower than industry guidelines of 2.2kWm3/s for similar systems. Systems which are higher are deemed less efficient. The motors have been de-rated to 70% of maximum power to calculate the SFP for this AHU. SFP = ((4.0kW + 4.0kW) * 70%) / 5.0m3/s = 1.12kW/m3/s As the AHU serves Offices areas the recommended air exchange rate would usually be 6 - 10 ACH/hr, using this exchange rate the airflow is suitable for an area of 1800 - 3000m3. Based on a CIBSE rule of thumb of 10l/s per person, there would be enough air flow supplied by this system for 500 persons. The figures and calculations in this section have been provided as a guide only. Detailed ventilation and air flow analysis should always be carried out before making judgement on the suitability of this equipment. The air flow rates which have been used were based on a rule of thumb calculation on the coil size and may not be accurate.

The calculation used was: 1.12

CS6.1, CS6.2, CS6.3: Filters

Are air intake and filter conditions acceptable?

Yes

The filters were free from any build up of dust / debris.

Have filters been changed according to current industry guidance?

Yes

The AHU filters changed at least every 6 months which is in-line with current PPM industry standards.

Is the filter differential pressure gauge, where fitted, working?

Yes

There are differential pressure gauges linked to the BMS on site and provide visual representation and dirty filter alarms to the facilities team. These were seen to be operational with no cause for concern.

CS6.5 Condition of heat exchangers

Are heat exchangers in good condition?

Yes

The heat exchange coils were seen to be in a good and clean condition, the fins were undamaged and there were no signs of leakage.

CS6.6 Refrigeration leaks (if DXCoil installed)

Are there any signs of a refrigerant leak?

Not applicable, refrigerant is not supplied to this AHU plant.

CS6.7/a Fan rotation

Does the fan rotate in the correct direction?

Yes

There is no problem with the directional air flow on this system.

Is the speed control or modulation operational?

Yes

The fans on the motors are equipped with Variable Speed Drives (VSD) to enable modulation to be applied to the airflow rate.

CS6.7/b Fan and control

Note the fan type, and method of air speed control. Check the setting and operation of any fresh air/recirculation dampers.

There is a belt driven centrifugal fan installed to this system.

The assessor made the following notes and recommendations:

Air speed control can be preset at the controller or auto mode can be selected so air speed matches temperature requirements. The fresh air and recirculation dampers appeared to be correctly operational with no cause for concern.

CS6.8 Heat recovery

Identify whether the systems have any energy conservation facilities, e.g. heat recovery, free cooling sequence, and check for evidence that such facilities are/have been functioning.

The assessor made the following notes and recommendations:

There is no heat recovery on this system and as such extracted heat from the area is vented directly outside.The BMS/Controller indicated that the heat recovery facility was operating correctly. The AHU night time cooling regime was not provided by the client.

CS6.9 Air leakage

Observe the air handling plant and visible air containment including ductwork, floor or ceiling plenums and builders’ work shafts for signs of excessive leakage and energy loss.

Areas around the air handling unit, including doors and hatches, were inspected and no leaks were detected. The duct insulation appeared to be in a good condition, there were no obvious signs of energy loss.

CS 7.1, CS7.2 Outdoor air inlets

Locate the inlets for outdoor air. Note any significant obstructions or blockages to inlet grilles, screens and pre- filters. Note where inlets may be affected by proximity to local sources of heat, or to air exhausts.

The assessor made the following notes and recommendations:

The air inlets grilles were in a good condition, free from obstructions, debris or excessive dust and gave no cause for concern. The air inlets did not appear to be affected by any heat sources.

Terminal units

Terminal unit 1

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU1 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

The terminal unit is linked to a local system controller which is sufficient to provide an adequate level of control and further details of any controller short falls can be found in the 'System Controls' section of this report.

Terminal unit 2

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU2 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 3

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU3 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 4

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU4 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 5

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU5 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 6

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU6 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 7

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU7 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 8

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU8 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Reception Office
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 9

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU9 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Reception
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 10

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU10 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 11

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU11 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 12

Unit: VOL001/SYS001 Bedrooms and Common Areas
Component: VOL001/SYS001/TU12 Bedrooms and Common Areas- Fan Coil Unit
Description of unit: Fan Coil Unit
Cooling plant serving terminal unit: VOL001/SYS001/CP1 Climaveneta-Air Cooled Chiller-Bedrooms and Common Areas-Main Chiller
Manufacturer: Ability
Year installed: 2012
Area served: Bedroom
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal chilled water pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

Yes

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

There was no evidence to suggest chilled & hot water was being supplied simultaneously.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 13

Unit: VOL001/SYS002 20th Floor Plant Room
Component: VOL001/SYS002/TU1 20th Floor Plant Room- Wall Mounted Unit
Description of unit: Wall Mounted Unit
Cooling plant serving terminal unit: VOL001/SYS002/CP1 Toshiba-Single Split-20th Floor Plant Room-Split AC 1
Manufacturer: Toshiba
Year installed: 2012
Area served: 20th Floor Plant Room
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal refrigerant pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

There is no ductwork associated with this type of terminal unit.

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

Not applicable, this terminal unit is not linked to a water loop of any kind.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 14

Unit: VOL001/SYS003 11th Floor Plant Room
Component: VOL001/SYS003/TU1 11th Floor Plant Room- Wall Mounted Unit
Description of unit: Wall Mounted Unit
Cooling plant serving terminal unit: VOL001/SYS003/CP1 Toshiba-Single Split-11th Floor Plant Room-Split AC 2
Manufacturer: Toshiba
Year installed: 2012
Area served: 11th Floor Plant Room
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal refrigerant pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

There is no ductwork associated with this type of terminal unit.

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

Not applicable, this terminal unit is not linked to a water loop of any kind.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

Terminal unit 15

Unit: VOL001/SYS004 Coms Room
Component: VOL001/SYS004/TU1 Coms Room- Wall Mounted Unit
Description of unit: Wall Mounted Unit
Cooling plant serving terminal unit: VOL001/SYS004/CP1 Toshiba-Single Split-Coms Room-Split AC 3
Manufacturer: Toshiba
Year installed: 2012
Area served: Coms Room
Discrepancies noted: There were no notable system discrepancies.

CS4.1 Insulation

Is the pipework adequately insulated?

Yes

Internal refrigerant pipe work connected to this terminal unit was enclosed and not accessible during the inspection.

Is the ductwork adequately insulated?

There is no ductwork associated with this type of terminal unit.

CS4.2 Unit condition

Are the terminal units in good working order?

Yes

The terminal unit was seen to be in a good condition. The filters were inspected and found to be in a clean condition.

CS5.1, CS5.2 Grilles and air flow

Do air delivery openings provide good distribution?

Yes

The terminal unit was seen to be positioned well enough to provide an adequate level of cooling throughout the conditioned space.

Is there evidence of tampering with diffusers?

The air grilles on the terminal unit were inspected and found to be in a good condition and show no evidence of tampering.

Are chilled and hot water being supplied to terminals simultaneously?

Not applicable, this terminal unit is not linked to a water loop of any kind.

Are there are any records of occupant complaints regarding air distribution?

The assessor was not informed of any occupant dissatisfaction with the distribution from the terminal unit during the inspection.

CS5.3, CS5.4, CS5.5 Diffuser positions

Is there potential for air to short-circuit from supply to extract?

The terminal unit was observed to be positioned well enough to allow good air circulation across the coils. There were no blockages to air paths and no significant risk of air re-circulation.

Is the position of partitioning or furniture adversely affecting performance?

The position of the terminal unit is not affected by furniture or partitioning and there is no potential for the re-circulation of air from this unit.

Is the control and operation adequate?

Yes

System controls

Control for VOL001/SYS001 Bedrooms and Common Areas

CS8.1 Is the zoning appropriate in relation to anticipated cooling demand?

Yes

The controller is located within the conditioned area. Full temperature adjustment and scheduling is possible to all zones served by this controller.

CS8.2 Note the current indicated weekday and time of day on controllers or BMS against the actual time.

The date & time on the system controller have been setup correctly.

CS8.3/a Note the set on and off periods (for weekday and weekend if this facility is available with the timer).

As this system is required to operate on a 24/7 basis, time schedules are not required.

CS 8.3/b Is there a shortfall in timer capabilities?

The assessor made the following notes and recommendations:

The system controller is installed with a fully programmable 7-day timer.

CS8.4 Identify and assess zone heating and cooling temperature control sensors. Are the sensor types and locations appropriate in relation to heating and cooling emitters, heat flows or likely temperature distributions in the zone or space?

Yes

The temperature sensor is located within the internal unit. The temperature sensors are likely to give an adequate reflection of space temperature throughout the conditioned space.

CS8.5 Note the set temperature in each zone for heating and cooling in relation to the activities and occupancy of zones and spaces in relation to the manager’s intent.

The system controller was found to be in cooling mode and set to maintain a space temperature of 21 degC.

The assessor made the following notes and recommendations:

It is recommended that seasonal set points are introduced on this system to minimise energy waste. The following set points will optimise efficiency: the Winter set point should be circa 19 degC with the unit set to 'heating' mode. The Summer set point should be circa 24 degC operating in 'cooling' mode. In Spring/Autumn the controller should be set to 'auto' mode with a set point range of 21 degC - 22 degC.

CS8.6 Note whether a ‘dead band’ is, or can be, set between heating and cooling.

There is no potential for simultaneous heating and cooling within the area.

CS8.7 Do the sub system controls integrate effectively with the overall system control strategy?

Yes

The assessor made the following notes and recommendations:

There are no integration issues with this system controller.

CS8.8 Assess the means of modulating or controlling air flow rate through the air supply and exhaust ducts.

There is a 3 speed fan selector installed to the system controller to modulate the air flow rate

PS3.6 Are guidance notices visible or controls available to inhibit use of cooling equipment whilst windows are open or cooling/heating is on?

There are no guidance notices in place to advise occupants on the correct operation of the AC system.

The assessor made the following notes and recommendations:

It is recommended that notices are placed adjacent to the system controller which advise occupants of the recommended temperature set points and as a reminder to switch off the systems before leaving an area unoccupied.

Control for VOL001/SYS002 20th Floor Plant Room

CS8.1 Is the zoning appropriate in relation to anticipated cooling demand?

Yes

The controller is located within the conditioned area. One system with a single controller installed to serve a single zone. No specific zoning required.

CS8.2 Note the current indicated weekday and time of day on controllers or BMS against the actual time.

The date & time on the system controller have been setup correctly.

CS8.3/a Note the set on and off periods (for weekday and weekend if this facility is available with the timer).

As this system is required to operate on a 24/7 basis, time schedules are not required.

CS 8.3/b Is there a shortfall in timer capabilities?

The assessor made the following notes and recommendations:

The system controller is installed with a fully programmable 7-day timer.

CS8.4 Identify and assess zone heating and cooling temperature control sensors. Are the sensor types and locations appropriate in relation to heating and cooling emitters, heat flows or likely temperature distributions in the zone or space?

Yes

The temperature sensor is located within the internal unit. The temperature sensors are likely to give an adequate reflection of space temperature throughout the conditioned space.

CS8.5 Note the set temperature in each zone for heating and cooling in relation to the activities and occupancy of zones and spaces in relation to the manager’s intent.

The system controller was found to be in cooling mode and set to maintain a space temperature of 21 degC.

The assessor made the following notes and recommendations:

The conditioned area requires specific environmental set points and therefore it is not prudent to recommend a specific temperature set point strategy. The client should however be aware that the adjustment of temperatures set points are one of the easiest ways to make fast energy savings. The client should review the temperature requirements within the area and raise the cooling set point as high as possible.

CS8.6 Note whether a ‘dead band’ is, or can be, set between heating and cooling.

There is no potential for simultaneous heating and cooling within the area.

CS8.7 Do the sub system controls integrate effectively with the overall system control strategy?

Yes

The assessor made the following notes and recommendations:

There are no integration issues with this system controller.

CS8.8 Assess the means of modulating or controlling air flow rate through the air supply and exhaust ducts.

There is a 3 speed fan selector installed to the system controller to modulate the air flow rate

PS3.6 Are guidance notices visible or controls available to inhibit use of cooling equipment whilst windows are open or cooling/heating is on?

There are no guidance notices in place to advise occupants on the correct operation of the AC system.

The assessor made the following notes and recommendations:

It is recommended that notices are placed adjacent to the system controller which advise occupants of the recommended temperature set points and as a reminder to switch off the systems before leaving an area unoccupied.

Control for VOL001/SYS003 11th Floor Plant Room

CS8.1 Is the zoning appropriate in relation to anticipated cooling demand?

Yes

The controller is located within the conditioned area. One system with a single controller installed to serve a single zone. No specific zoning required.

CS8.2 Note the current indicated weekday and time of day on controllers or BMS against the actual time.

The date & time on the system controller have been setup correctly.

CS8.3/a Note the set on and off periods (for weekday and weekend if this facility is available with the timer).

As this system is required to operate on a 24/7 basis, time schedules are not required.

CS 8.3/b Is there a shortfall in timer capabilities?

The assessor made the following notes and recommendations:

The system controller is installed with a fully programmable 7-day timer.

CS8.4 Identify and assess zone heating and cooling temperature control sensors. Are the sensor types and locations appropriate in relation to heating and cooling emitters, heat flows or likely temperature distributions in the zone or space?

Yes

The temperature sensor is located within the internal unit. The temperature sensors are likely to give an adequate reflection of space temperature throughout the conditioned space.

CS8.5 Note the set temperature in each zone for heating and cooling in relation to the activities and occupancy of zones and spaces in relation to the manager’s intent.

The system controller was found to be in cooling mode and set to maintain a space temperature of 21 degC.

The assessor made the following notes and recommendations:

The conditioned area requires specific environmental set points and therefore it is not prudent to recommend a specific temperature set point strategy. The client should however be aware that the adjustment of temperatures set points are one of the easiest ways to make fast energy savings. The client should review the temperature requirements within the area and raise the cooling set point as high as possible.

CS8.6 Note whether a ‘dead band’ is, or can be, set between heating and cooling.

There is no potential for simultaneous heating and cooling within the area.

CS8.7 Do the sub system controls integrate effectively with the overall system control strategy?

Yes

The assessor made the following notes and recommendations:

There are no integration issues with this system controller.

CS8.8 Assess the means of modulating or controlling air flow rate through the air supply and exhaust ducts.

There is a 3 speed fan selector installed to the system controller to modulate the air flow rate

PS3.6 Are guidance notices visible or controls available to inhibit use of cooling equipment whilst windows are open or cooling/heating is on?

There are no guidance notices in place to advise occupants on the correct operation of the AC system.

The assessor made the following notes and recommendations:

It is recommended that notices are placed adjacent to the system controller which advise occupants of the recommended temperature set points and as a reminder to switch off the systems before leaving an area unoccupied.

Control for VOL001/SYS004 Coms Room

CS8.1 Is the zoning appropriate in relation to anticipated cooling demand?

Yes

The controller is located within the conditioned area. One system with a single controller installed to serve a single zone. No specific zoning required.

CS8.2 Note the current indicated weekday and time of day on controllers or BMS against the actual time.

The date & time on the system controller have been setup correctly.

CS8.3/a Note the set on and off periods (for weekday and weekend if this facility is available with the timer).

As this system is required to operate on a 24/7 basis, time schedules are not required.

CS 8.3/b Is there a shortfall in timer capabilities?

The assessor made the following notes and recommendations:

The system controller is installed with a fully programmable 7-day timer.

CS8.4 Identify and assess zone heating and cooling temperature control sensors. Are the sensor types and locations appropriate in relation to heating and cooling emitters, heat flows or likely temperature distributions in the zone or space?

Yes

The temperature sensor is located within the internal unit. The temperature sensors are likely to give an adequate reflection of space temperature throughout the conditioned space.

CS8.5 Note the set temperature in each zone for heating and cooling in relation to the activities and occupancy of zones and spaces in relation to the manager’s intent.

The system controller was found to be in cooling mode and set to maintain a space temperature of 21 degC.

The assessor made the following notes and recommendations:

Consider increasing the server room set points. This may be done in small increments to ensure equipment stability. Guidance from ASHRAE (American Society Heating Refrigeration and Air Conditioning Engineers) recommends that data centre temperatures can be increased to 27 degC depending upon the age of the installed equipment. It is recommended that the server room set-points are increased in small increments of 1 degC and if temperature stability proves an issue during peak summer weather then this can always be reduced for summer. If in doubt the manufacturer of the process equipment should be consulted.

CS8.6 Note whether a ‘dead band’ is, or can be, set between heating and cooling.

There is no potential for simultaneous heating and cooling within the area.

CS8.7 Do the sub system controls integrate effectively with the overall system control strategy?

Yes

The assessor made the following notes and recommendations:

There are no integration issues with this system controller.

CS8.8 Assess the means of modulating or controlling air flow rate through the air supply and exhaust ducts.

There is a 3 speed fan selector installed to the system controller to modulate the air flow rate

PS3.6 Are guidance notices visible or controls available to inhibit use of cooling equipment whilst windows are open or cooling/heating is on?

There are no guidance notices in place to advise occupants on the correct operation of the AC system.

The assessor made the following notes and recommendations:

It is recommended that notices are placed adjacent to the system controller which advise occupants of the recommended temperature set points and as a reminder to switch off the systems before leaving an area unoccupied.

Assessor’s details

Assessor’s name: James Corner
Email: lowcarbon@mitie.com
Assessor ID: STER000552
Employer/Trading name: Mitie
Employer/Trading address: The Shard, Level 12, 32 London Bridge Street, London, SE1 9SG
Accreditation scheme: Sterling Accreditation Ltd
Accreditation scheme telephone: 0161 727 4303
Accreditation scheme email: info@sterlingaccreditation.com

Inspection certificate

See the air conditioning inspection certificate for this property.

Other reports for this property

If you are aware of previous reports for this property and they are not listed here, please contact us at dluhc.digital-services@levellingup.gov.uk or call our helpdesk on 020 3829 0748 (Monday to Friday, 9am to 5pm).

There are no related reports for this property.

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Air conditioning inspection report

Report contents

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Executive summary

Key recommendations

Efficiency

Maintenance

Controls

Management

Subsystems inspected

VOL001/SYS001 Bedrooms and Common Areas

VOL001/SYS002 20th Floor Plant Room

VOL001/SYS003 11th Floor Plant Room

VOL001/SYS004 Coms Room

Pre-inspection records requested

Essential records

Desirable records

Optional records

Cooling plants

Cooling plant 1

Equipment Inspected

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the cooling plant/system:

Approved sections

CS2.1 Is the refrigeration plant operational?

CS2.2/a Is the area around the refrigeration plant clear of obstructions & debris?

CS2.2/b Is the general condition of refrigeration and any associated central plant in good order?

CS2.2/c Is the condenser placed clear from warm air discharge louvres?

CS2.3/a Are compressors operational or can they be brought into operation?

CS3.1/a Is the heat rejection plant operational?

CS3.1/b Are condenser heat exchangers undamaged/ un-corroded and clean?

CS3.2/a Is the area around the heat rejection plant clear of obstructions & debris?

CS3.2/b Is the condenser free of any possibility of air recirculation?

CS4.1 Is the insulation on circulation pipe work well fitted and in good order?

Appropriately Sized Cooling Plant

Notes and Recommendations

Refrigeration

Are there any signs of a refrigerant leak?

Montreal/ODS/F-Gas controlled?

Notes and Recommendations

Regular Maintenance

Is there evidence of regular maintenance?

Is the maintenance undertaken by suitably competent people and in accordance to industry guidelines?

Metering Comparison to appropriate energy benchmarks

Is metering installed to enable monitoring of energy consumption of refrigeration plant?

Is the refrigeration plant connected to a BEMS that can provide out of range alarms?

Are there any records of air conditioning plant usage or sub-metered energy consumption with expected hours of use per year for the plant?

Is the energy consumption or hours of use excessive?

Water Cooled Chillers (Cooling Towers & Evaporative Condensers)

Is the water flow through cooling towers or evaporative coolers even and efficient, and there is no loss of water?

Is there a management regime in place to ensure that water is regularly checked and treated to ensure that there is no Legionella risk?

Humidity Control

Is there separate equipment installed for humidity control?

Cooling plant 2

Equipment Inspected

Note below any discrepancy between information provided by client and on site information collected, or any information of additional relevance to the cooling plant/system:

Approved sections

CS2.1 Is the refrigeration plant operational?

CS2.2/a Is the area around the refrigeration plant clear of obstructions & debris?

CS2.2/b Is the general condition of refrigeration and any associated central plant in good order?

CS2.2/c Is the condenser placed clear from warm air discharge louvres?

CS2.3/a Are compressors operational or can they be brought into operation?

CS3.1/a Is the heat rejection plant operational?

CS3.1/b Are condenser heat exchangers undamaged/ un-corroded and clean?

CS3.2/a Is the area around the heat rejection plant clear of obstructions & debris?

CS3.2/b Is the condenser free of any possibility of air recirculation?

CS4.1 Is the insulation on circulation pipe work well fitted and in good order?

Appropriately Sized Cooling Plant

Notes and Recommendations

Refrigeration

Are there any signs of a refrigerant leak?

Montreal/ODS/F-Gas controlled?

Notes and Recommendations

Regular Maintenance

Is there evidence of regular maintenance?

Is the maintenance undertaken by suitably competent people and in accordance to industry guidelines?

Metering Comparison to appropriate energy benchmarks

Is metering installed to enable monitoring of energy consumption of refrigeration plant?

Is the refrigeration plant connected to a BEMS that can provide out of range alarms?

Are there any records of air conditioning plant usage or sub-metered energy consumption with expected hours of use per year for the plant?