Air Conditioning Inspection Report

Air Conditioning Inspection Report

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Site DetailsSite Address(where inspection was carried out)

Macclesfield College, Park Lane, Macclesfield, SK11 8LF

City Macclesfield Postcode SK11 8LF RRN 0830-0454-0779-0620-5096 Related RRN 9200-3975-0674-0860-4000

Report InformationInspection Date 2014-10-28 Issue Date 2014-11-07 UPRN 307754600000

Assessor DetailsAssessor Name Gary Littlewood Assessor ID STRO014867

Employer/Trading Name EPC Now

Employer/Trading Address 19 Albion Street, Manchester M1 5LN

Accreditation Scheme Name stroma


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Executive SummaryThis report has been prepared in accordance with Part 4 of the Energy Performance of Buildings (Certificates and Inspections) (England and Wales) Regulations 2007, which implementsArticle 9 of the Energy Performance of Buildings Directive. The inspection has been carried out by an Accredited Air Conditioning Assessor using the Department for Communities and LocalGovernment approved inspection and reporting methodology

Building type/details (building benchmark and occupancy profile)

1. This report should be retained as evidence that the required inspection has been undertaken, and it is recommended that consideration be given to implementing the report’srecommendations aimed at reducing energy consumption.

2. EPC NOW Ltd has been commissioned to undertake an inspection of the air conditioning systems and associated controls at :- Macclesfield College

Park LaneMacclesfieldCheshire EastSK11 8LF

3. The inspection was carried out on: 27/10/2014 at 11:00 am

4. The building is a steel structured/cladded /High level glazed College/Education faciltiy, mainly consisting of Classrooms, Training rooms, Workshops, Breakout areas, IT rooms and Seminarrooms. the building has an estimated footprint of 12000m2, double glazed windows, T5 and compact fluorescent Lighting, controlled by a mixture of manual switches and occupancy sensors ,Mechanical/Natural Ventillation and a high occupancy level (exact occupancy level unknown)

5.The occupancy hours are 06.00 - 22:00 Monday - Sunday

6. The Buildings Air Conditioning sytem is made up of:

X 2 Mitsubishi Twin type condensor PUZHRP250HHA Connected to 2 x PCARP125GA Under Ceiling type Fan coil unitsX 1 Mitsubishi Split type condensor SUZKA35VA Connected to 1 x SLZKA35VA Cassette type Fan coil unitX 3 Mitsubishi Split type condensor PUZHRP100VHA2 Connected to 1 x PKARP100FAL Wall Mounted type Fan coil unitX 1 Mitsubishi Split type condensor PUZHRP100VHA2 Connected to 1 x PLARP100AA Cassette type Fan coil unitX 1 Mitsubishi Split type condensor PUZHRP125VHA2 Connected to 1 x PLARP125BA Cassette type Fan coil unitX 1 Mitsubishi Split type condensor MUZGV60VA Connected to 1 X MSZGA60VA Wall Mounted type Fan CoilX 2 Hitachi Split type condensor RAS5HVRNE Connected to 1 x RC150P5NIE Cassette type Fan coil unitX 1 Toshiba Split type condensor RAVSM1403ATE Connected to RAVSM1404UTE Cassette type Fan coil

Sampling statement in accordance with DCLG guidance:


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Executive SummaryFor the purpose of the report samples have been taken in accordance with CIBSE TM44, Samples taken from areas demonstrate the age, condition and method of control. The Report is basedon a visual inspection only. No equipment or plant was removed or stripped down. Cooling requirements have been calculated in accordance with CIBSE guides and therefore should not betreated as an in depth heat load calculation.

7. The system in this building was assessed to be at NOS Level 3

Comments on controls/maintenance/operation

A bi-annual maintenance regime was documented as being in place and is deemed adequate for current operations

The Control of the system is single zone controls within each Zone (Room)

The system was found to be in good working order and is adequate for current operations.

Comments on availability of system documentation (or whether it had to be prepared)

system documentation was readily available throughout the inspection process.

Additional information of relevance to the building/system/inspection/report

Included in this report wil be a description of the air conditioning services , system efficiencies, approximate sizing of the system compared to industry guidelines and suggested improvements,which could be made to increase the system efficicnecy. The inspection report wioll bennefit the owner/manager only if it's findings are acted upon


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Key Recommendations:

Advice and comments on the efficiencies of the AC sub system(s)

Regularly check equipment time schedule programmes match the actual occupancy times, Easy gains with regards to energy consumption are available by ensuring that HVAC equipmentis time scheduled and only operates when required. staff notices should be placed near timers/controls to prevent unauthorised use. consider wether to lock timers and allow for only seniormanagement to review

Insulation was found to be damaged/ripped where visible within the outdoor plant space. uninsulated/damaged refrigeration pipework will cause inefficiences. you should consider regularinspections of the pipework/insultation condition. follow best practice guidelines, CIBSE / HVCA SFG 20. Guide M/ Guide F

Consider replacing the split type systems to a VRF system to reduce the number of individual circuits. Heat recovery are avilable and could be an effective and efficient method alternative tosingle split systems currently installed. heat removed from areas with constant cooling requirements may be recycled to heat other parts of the building

Advice and comments on the maintenance of the AC sub system(s)

F-Gas regulations, good practice guidelines suggest that regular refrigernat leak checks are essential to ensure that systems are well maintained and operating efficiently. Consider a yearlyreview of your maintenance regime to ensure that the bi-annual regime in place is sufficient to the systems requirements

Consider regular inspections of the pipework insulation, as damaged insulation can lead to inefficiences in the operation of the system

Advice and comments on the control of AC sub system(s)

Consider installing PIR sensors for limited use rooms such as classrooms. The PIR sensor can trigger the room A/C unit upon occupancy and will automatically switch off the system when theroom is empty

Advice and comments on the management of AC sub system(s)

Consider installing sub metering to the plant to enable the recording of electricity consumtion. The bennefits of completing these works will be more compelling as energy monitoring can createimmediate savings when combined with up to date technology

Consider seeking advice on the instalation of photovoltaic panels (PV) to provide electricity in order to run the buildings plant

Consider installing solar reflective film on any windows without in order to reduce the heat gain within the building. This would allow the system's compressors to run for shorter periods of timewhich will save energy consumtion


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Sub System IndexVolume Definitions vol001/sys001/ Classroom M175

Sub System ID sys001

Sub System Description Mitsubishi PUHZRP125VHA2 Split type Condensor, 12.5 KW. Connected to a Cassette type indoor unit with hard wire local control

Effective Rated Cooling Output of Sub System(kW)

12

Sub System Area Served vol001/ Classroom M175

Inspection Date 2014-10-27

Cooling Plant Count 2

AHU Count 0

Terminal Units Count 1

Sub System Controls Count 1


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Sub System IndexVolume Definitions vol001/sys002/ server room M108


Sub System Description Mitsubishi PUHZRP250GA Twin type Condensor, 25 KW. Connected to 2 Cassette type indoor units with hard wire local control


25

Sub System Area Served vol001/server room M108



AHU Count 0




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Sub System IndexVolume Definitions vol001/sys003/ E CAT Coms Room


Sub System Description Mitsubishi MUZGA60VA Split type Condensor, 6 KW. Connected to 1 Wall mount type indoor unit with hard wire local control


6

Sub System Area Served vol001/ E CAT Coms Room



AHU Count 0




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Note: Request the following information from client and complete the following checklist. The assessor should examine the relevant documentation and systems as far as possible to checkthat the installed equipment is as described. If the documentation is not available, then an additional part of this procedure is to locate the equipment and assemble a portfolio of relevantdocumentation which should include all ‘Essential’ items as a minimum.

Record Checklist Pre Inspection InformationLevel Information Required Reviewed Not Available

Itemised list of installed air conditioning and refrigeration plant including product makes, models andidentification numbers.

[x] [ ]

Cooling capacities, with locations of the indoor and outdoor components of each plant. [x] [ ]

Description of system control zones, with schematic drawings. [ ] [x]

Description of method of control of temperature. [x] [ ]

Description of method of control of periods of operation. [x] [ ]

Essential

Floor plans and schematics of air conditioning systems. [ ] [x]

Reports from earlier inspections of air conditioning systems, and for the generation of an energyperformance certificate.

[ ] [x]

Records of maintenance operations carried out on refrigeration systems, including cleaning indoor andoutdoor heat exchangers, refrigerant leakage tests, repairs to refrigeration components replenishing withrefrigerant.

[x] [ ]

Records of maintenance operations carried out on air delivery systems, including filter cleaning andchanging, and cleaning of heat exchangers.

[x] [ ]

Records of calibration and maintenance operations carried out on control systems and sensors, or BMSsystems and sensors.

[ ] [x]

Records of sub-metered air conditioning plant use or energy consumption. [ ] [x]

Desirable

For relevant air supply and extract systems, commissioning results of measured absorbed power at normalair delivery and extract rates, and commissioning results for normal delivered delivery and extract air flowrates (or independently calculated specific fan power for the systems).

[ ] [x]

An estimate of the design cooling load for each system (if available). Otherwise, a brief description of theoccupation of the cooled spaces, and of power consuming equipment normally used in those spaces.

[x] [ ]

Records of any issues or complaints that have been raised concerning the indoor comfort conditionsachieved in the treated spaces.

[ ] [x]

Optional

Where a BMS is used the manager should arrange for a short statement to be provided describing itscapabilities, the plant it is connected to control, the set points for the control of temperature, the frequencywith which it is maintained, and the date of the last inspection and maintenance.

[ ] [x]


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Record Checklist Pre Inspection InformationLevel Information Required Reviewed Not Available

Where a monitoring station, or remote monitoring facility, is used to continually observe the performanceof equipment such as chillers, the manager should arrange for a statement to be provided describing theparameters monitored, and a statement reviewing the operating efficiency of the equipment.

[ ] [x]


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Cooling Plant Equipment InspectedUnit Identifier sys001

Component Identifier Mitsubishi Split type Condensor, 12.5 KW. Connected to a Cassette type indoor unit

Manufacturer Mitsubishi

Description (type/details) Mitsubishi Split type system

Model/Reference PUHZRP125VHA2

Serial Number 78U00982

Year Plant Installed 2007

Rated Cooling Capacity (kW) 12

Refrigerant Type R410A

Refrigerant Charge (kg) 5

Location of Cooling Plant Roof

Areas/Systems Served vol001/ M175 Classroom

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:N/A


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This section applies to the following unit: Mitsubishi Split type Condensor, 12.5 KW. Connected to a Cassette type indoor unit

Cooling Plant Equipment Visual InspectionItem Ref Inspection Item Finding Notes and Recommendations

CS2.1 Is the refrigeration plant operational? Yes [x] No [ ] Fully operational

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

Yes [x] No [ ] Area is clear

Consider regular inspections of the area around the Refrigeration plant to ensure it is clear of obstructionor debris. Regularly carrying out these insepctions could prolong the life of the system and ensure optimumperfomance

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

Yes [x] No [ ] The system is in as good as new condition

As expected

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

Yes [x] No [ ] Condensor is clear of warm air Louvers

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

Yes [x] No [ ] Fully operational

CS3.1/a Is the heat rejection plant operational? Yes [x] No [ ] Full Working Order

Follow the Manufacturers Recommended Maintenance regime to prolong the life of the system and ensureoptimum performance

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

Yes [x] No [ ] Good Condition

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


Consider regular inspections of the area around the heat rejection plant to ensure it is clear of obstructionor debris. Regularly carrying out these insepctions could prolong the life of the system and ensure optimumperfomance

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

Yes [x] No [ ] Good clean condition


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Consider Regular inspections of the condensor condition. A blocked or damaged condensor coil will result inhigher energy bills and possible damage to the main system components

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

Yes [x] No [ ] Insulation is in good condition

Consider regular inspections of the insulation. Worn or damaged insulation can lead to inneficicences in thesystems performance


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Cooling Plant Detailed Inspection NotesItem Ref Item Inspection Item Finding Notes and Recommendations

Refrigerant Type R410ACS1.1 RefrigerantUsed Montreal/ODS/F-Gas

controlled?Yes [x] No [ ]

F-Gas Controlled

Is there evidence of regular maintenance? Yes [x] No [ ] There is an up to date F-Gas Log Book on siteCS1.3 RegularMaintenance

Is the maintenance undertaken by suitablycompetent people and in accordance toindustry guidelines?

Yes [x] No [ ] Yes

The Maintenance Company in place is: Conditioned AirTechnology Ltd Conditioned Air House Edward St HydeCheshire SK14 2BQ

Following Information Required:

Total Occupants served by this plant 24

Total Floor Area served by thisplant(m²)

69

Occupant Density (m²/person) 3

Maximum Instantaneous Heat Gain(W/m²)

150

Installed Cooling Capacity (kW) 12.5

The Installed Size is Deemed:

CS1.4CL1.1

AppropriatelySized CoolingPlant

More than ExpectedLess than ExpectedAs Expected

[x][ ][ ]

Building Regulations Approved Document Part L 2nd tierdocumentation provides guidance suggesting that the plantshould not be more than 20% oversized. This should be adoptedas means of comparison to stay in line with current standards.

The room has high levels of IT/Computer equipment therefore ihave calculated the heat gains to be 150 W/m2

Yes [ ] No [x]Is metering installed to enable monitoring ofenergy consumption of refrigeration plant?

Recorded meter reading N/a on thissystem

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

Yes [ ] No [x] N/a on this system

CS1.6 MeteringComparisonto appropriateenergybenchmarks

Are there any records of air conditioning plantusage or sub-metered energy consumption

Yes [ ] No [x] N/a


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with expected hours of use per year for theplant?

Is the energy consumption or hours of useexcessive?

Yes [ ] No [x] No evidence submitted

CS2.2/d RefrigerationLeaks

Are there any signs of a refrigerant leak? Yes [ ] No [x] No visual Signs at the time of assessment

Consider regular visual inspection of the the system's pipework/Heat Rejection plant and Terminal units to look for signs ofleaks eg: oily stains on the pipework or pipework insulationImmediately report any signs of leakage to the Maintenancecompany in place to ensure it is dealt with correctly according toF-Gas industry guidelines

Refrigeration Temperature:

Pre Compressor(°C) 22

Post Compressor(°C) 34

Ambient(°C) 14

The Temperature is Deemed:


[ ][ ][x]

CL1.3 Refrigeration

Assess the refrigeration compressor(s) and themethod of refrigeration capacity control

Dc Inverter Driven

Is the water flow through cooling towers orevaporative coolers even and efficient, andthere is no loss of water?

Yes [ ] No [x] N/a on this systemCS3.5 Water CooledChillers(Cooling Towers& EvaporativeCondensers)

Is there a management regime in place toensure that water is regularly checked andtreated to ensure that there is no Legionellarisk?


HumidityControl

Is there separate equipment installed forhumidity control?

Yes [ ] No [x] N/a on this sytem


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Component Identifier Mitsubishi Twin Split type Condensor, 25 KW. Connected to 2 X Under ceiling type indoor unit


Description (type/details) Mitsubishi Twin split type system

Model/Reference PUHZRP250HGA

Serial Number 74V0004






Areas/Systems Served vol001/ M108 Comms Room



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This section applies to the following unit: Mitsubishi Twin Split type Condensor, 25 KW. Connected to 2 X Under ceiling type indoor unit








As expected


Yes [ ] No [x] Condensor is clear of warm air Louvers



As expected





As expected





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F-Gas Controlled



Yes [x] No [ ] Yes




31



350

Installed Cooling Capacity (kW) 12.5


CS1.4CL1.1



[ ][ ][x]


I have based my calculation on 350 W/m2 due to the levels ofIT/Comms equipment within this room

There are 2 x 25kw Twin type split systems installed in M108Comms room that share the load. one system works for 12hours then is stopped allowing the secondary system to takeover for 12 hours






Are there any records of air conditioning plantusage or sub-metered energy consumptionwith expected hours of use per year for theplant?

Yes [ ] No [x] N/a


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Ambient(°C) 14



[ ][ ][x]

CL1.3 Refrigeration


Dc Inverter Driven





HumidityControl




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Component Identifier Mitsubishi Split type Condensor, 6 KW. Connected to a Wall mount type indoor unit


Description (type/details) Mitsubishi split type system

Model/Reference MUZGA60VA

Serial Number 6002548






Areas/Systems Served vol001/ E CAT Comms Room



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This section applies to the following unit: Mitsubishi Split type Condensor, 6 KW. Connected to a Wall mount type indoor unit



As expected






As expected


Yes [x] No [ ] Condensor is clear of warm air Louvers



As expected









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F-Gas Controlled



Yes [x] No [ ] Yes




10



500

Installed Cooling Capacity (kW) 6


CS1.4CL1.1



[ ][ ][x]


I have based my calculation on 250 W/m2 as there is high levelsof IT/Comms equipment within this room






Are there any records of air conditioning plantusage or sub-metered energy consumptionwith expected hours of use per year for theplant?

Yes [ ] No [x] N/a


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Ambient(°C) 14



[ ][ ][x]

CL1.3 Refrigeration


Dc Inverter Driven





HumidityControl




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Air Handling Systems:Note: For safety reasons, it will be necessary for air handling fans in air distribution systems to be turned off in order to gain access inside air handlers or ductwork to examine components suchas fans, drives, filters, heat exchangers and control dampers. The building manager should arrange safe access for the inspector.


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Terminal Units:

Terminal Unit Equipment InspectionUnit Identifier sys001/vol001/fcu001 / Classroom M175

Component Identifier Fcu 001/ PLARP125BA Cassette type fan coil unit

Description of Unit sys001/ Mitsubishi/ Classroom M175

Identify Cooling Plant Serving Terminal Unit sys001


Year Terminal Unit Installed 2007

Terminal Unit Location Classroom M175

Area Served vol001/ Classroom M175

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

None


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This section applies to the following unit:Fcu 001/ PLARP125BA Cassette type fan coil unit

Terminal Unit Detailed Inspection NotesItem Ref Item Inspection Item Finding Notes and Recommendations

Is the pipework adequately insulated? Yes [x] No [ ] Insulation (where visible) is in good conditionCS4.1 Insulation

Is the ductwork adequately insulated? Yes [ ] No [x] No ductwork on this system

Consider regular inspections of the pipeworks insulation and report any worn/damagedinsulation to you maintenance provider in order to ensure optimum performance

CS4.2 Unit Condition Are the terminal units in good working order? Yes [x] No [ ] As good as new condition

Do air delivery openings provide gooddistribution?

Yes [x] No [ ] As expected

Is there evidence of tampering with diffusers? Yes [ ] No [x] No

CS5.1

Are chilled and hot water being supplied toterminals simultaneously?


CS5.2

Grilles & AirFlow

Are there are any records of occupantcomplaints regarding air distribution

Yes [ ] No [x] No complaint recorded

As expected

CS5.3 Is there potential for air to short-circuit fromsupply to extract?

Yes [ ] No [x] system is free from short-circuit potential

CS5.4 Is the position of partitioning or furnitureadversely affecting performance?

Yes [ ] No [x] There are no obstructions to system performance

CS5.5

DiffuserPositions

Is the control and operation adequate? Yes [ ] No [x] system provides adequate control


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Terminal Unit Equipment InspectionUnit Identifier sys002/vol001/ M108 Server room

Component Identifier Fcu002 Under ceiling type fan coil unit

Description of Unit sys002/Mitsubishi PCARP125GA / M108 Server room




Terminal Unit Location M108 Server room

Area Served vol001/ M108 Server room


None


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This section applies to the following unit:Fcu002 Under ceiling type fan coil unit









CS5.1



CS5.2

Grilles & AirFlow



As expected





CS5.5

DiffuserPositions



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Terminal Unit Equipment InspectionUnit Identifier sys003/vol001/ E101 Server room

Component Identifier fcu003 Mitsubishi MSZ-GA60VA Wall mounted Fan coil

Description of Unit sys003




Terminal Unit Location M108 Server room

Area Served vol001/ M108 Server room


None


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This section applies to the following unit:fcu003 Mitsubishi MSZ-GA60VA Wall mounted Fan coil









CS5.1



CS5.2

Grilles & AirFlow



As expected





CS5.5

DiffuserPositions



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System Controls:

System ControlsItem Ref Inspection Item Finding Notes and Recommendations

n/a Sub System Identifier (if applicable) sys001

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

Yes [x] No [ ] Single zone control

As expected

CS8.2 Note the current indicated weekday and timeof day on controllers or BMS against the actualtime.

Set time Sunday9:05 - Actual timeMonday 11:34

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

Timer not used Consider setting timers to run the system during office days/hours This will avoid wasted energy if the system isleft running during unoccupied times

CS8.3/b Is there a shortfall in timer capabilities? Yes [ ] No [x] No Shortfall

As expected

CS8.4 Identify and assess zone heating and coolingtemperature control sensors. Are the sensortypes and locations appropriate in relation toheating and cooling emitters, heat flows orlikely temperature distributions in the zone orspace?

Yes [x] No [ ] Factory fitted within return grille of fan coil unit

As expected

CS8.5 Note the set temperature in each zone forheating and cooling in relation to the activitiesand occupancy of zones and spaces in relationto the manager's intent.

19c Consider turning the temperature settings up to 23c This should maintain a comfortable enviroment for occupantsand save energy on the running of the system

CS8.6 Note whether a 'dead band' is, or can be, setbetween heating and cooling.

Factory set As expected

CS8.7 Do the sub system controls integrateeffectively with the overall system controlstrategy?

Yes [x] No [ ]


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CS8.8 Assess the means of modulating or controllingair flow rate through the air supply and exhaustducts.

Aorflow iscontrolled by aselectable fanspeed controllerand modulated

As expected

PS3.6 Are guidance notices visible or controlsavailable to inhibit use of cooling equipmentwhilst windows are open or cooling/heating ison?

Yes [ ] No [x] No visible signage

Consider installing signage, local to controllers to inhibit the use of the air conditioning whilst windows are open.Consider installing signage that limits the use of controllers to a suitably compotent person/manager Considerinstalling limit switches to windows to turn off the air conditioning plant when a window is opened.


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As expected


Time not set




As expected



As expected






Yes [x] No [ ]


Airflow iscontrolled by aselectable fan

As expected


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speed controllerand modulated





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As expected


Time not set




As expected



As expected






Yes [x] No [ ]


Airflow iscontrolled by aselectable fan

As expected


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speed controllerand modulated




Documents

Air Conditioning Inspection Report