TM44 Report on a Daikin VRV System
Job Description: TM44 Report on a Daikin VRV System
Area: London
Work carried out from this proposal
To provide TM44 Inspections on the client site as per information provided and include site surveys for each. Report compilation lodgement fee and certification valid for five years. Fee covers all the aspects of the production of the MHCLG compliant TM44 Air Conditioning Inspection report from site survey, first draft stage, and final lodgement, and includes the lodgement and registration fees. Quotation based on the information provided by the client. In many cases sufficient information can be gathered from a site survey of the premises, however, where available and particularly for buildings with centralised air conditioning and ventilation systems, any of the information listed below shall be made available on site or prior to preparation of the draft report to ensure we can assess the air conditioning systems as accurately as possible. In absence of this specific information, we will use site measurements, and default or calculated values in compliance with the approved TM44 methodology. The following information may be available in the building’s logbook or maintenance manual:
- Floor plans
- Itemised list of installed air conditioning and refrigeration plant including product makes, models and identification (often found on an Asset or ‘F’ Gas Register).
- Cooling capacities, with location of the indoor and outdoor components of each plant (often found on an Asset or ‘F’ Gas Register).
- Central and local air handling units, air conditioning systems – equipment seasonal and nominal efficiencies, design air flows, details including specific fan powers, heat recovery systems, types of controls.
- Description of system control zones, with schematics.
- Description of method of control of temperatures and periods of operation.
- Ideally for large building, mechanical, electrical and air conditioning schematics and specifications should be available where possible.
- On-site access to maintenance and service records.
Also included is an accompanying enhanced report based on an asset which includes the following features: –
Projection of operating costs per individual systems listed on asset register
Projection of total operating costs for systems listed on asset register
Potential impact on costs per recommendation
Energy label and energy efficiency ratio table
F Gas table
Asset list
Equipment sizing table
AHU / specific fan power table
Photographs highlighting any important issues
Key recommendations following TM44 Report
Efficiency
Consider to electrically meter the cooling systems to monitor their use and then try to reduce that use
Consider improving areas of building fabric with high heat loss and high heat gain. Use external shading, internal blinds, thermal insulation products and create entrance lobbies and upgrade to double or triple glazing to reduce infiltration drafts
Consider replacing any plant older than 7 years with new more energy efficient motors and future proofed stocks of refrigerant
Consider renewing older lighting systems on this site. Lighting controls and lamps play an important part in the heat load of a building. Improvements made in this area can significantly reduce heating load and therefore energy consumption used by the HVAC system and in general.
Consider checking whether a dead band has been set up to prevent coincidental heating and cooling.
Maintenance
Consider replacing or repair all weather beaten and damaged pipework insulation
Consider cleaning all condenser fins
Consider keeping the F Gas Refrigerant Logbook on site including any equipment manufactures operating and maintenance requirements. This will help any future inspections and give data for future carbon footprint work.
Consider cleaning all the Air Handling Unit and Fan Coil Unit air filters
Controls
Consider running the terminal units on low fan speeds
Consider reviewing the Controllers/BMS in respect of their capabilities, plant connected, set points, dead bands and frequency of maintenance for the building
Consider reviewing all the Controllers/BMS time scheduling to see if it is still appropriate
Management
Consider installing appropriate energy consumption metering at least to the more significant energy consuming air conditioning plant and subsequently record the consumption on a regular basis. CIBSE TM39: Building Energy Metering provides guidance on developing a metering plan. CIBSE TM22: Energy assessment and reporting method includes guidance on recording meter readings and on their interpretation.
When it becomes time to replace the cooling plant, the capacity should be reassessed rather than replaced with like for like. There may be scope to reduce the overall cooling capacity and combine this with the latest technology to reduce energy consumption.
Consider providing guidance notes to keep the doors and windows closed whilst the cooling or heating is on
ACES Group Can Also Supply and Install New Air-Conditioning Units – Call Us On 01865 890996
Some of the many Daikin Units we support
| – RXM-R – ARXM-R – FTXG-LS – FVXS-F – FTXS-K – CTXM-R – FVXM-F – FTXG-LW – CTXM-M – CTXS-K – RXS-L | – FTXS-G – RXS-L3 – ARXS-L – FDXS-F9 – ARXS-L3 – FDXS-F – RXM-R – FDXM-F – ARXM-R – FLXS-B – FLXS-B9 | – CTXM-N – RXYSA-AY1 – FCAG-B – LRNUN-AY1 – CTXA-AW – FCAHG-H – FXFQ-B – RZQG-L(8)Y1 – RZAG-A – CTXA-BS – RZAG-MV1 | -2AMXF-A -3MXM-N9 -3MXM-N -2MXM-M9 -5MXM-N9 -5MXM-N -2MXM-M -4MXM-N9 -2MXM-N -5MXM-M -4MXM-M | – RXYQ-T9 – RYMQ-U – RYYQ-U – FXFA-A – RXYSA-AY1 – FXFQ-A – RWEYQ-T8 – RYYQ-T8 – RXYQ-U – RXYQ-T8 – RQYQ-P |
Daikin Air-Conditioning Systems designed for comfort and efficiency. Prominent in small, medium, and large offices. Daikin air curtains minimise hot and cold air loss. Fully flat cassettes integrate seamlessly into false ceilings and will not disturb office concentration with its quiet operation. ACES engineers specialise in service and maintenance of indoor and outdoor Daikin units.
Abbreviations
HVAC – Heating, Ventiliation and Air Conditioning, PLT – Pressure Leak Test, PRV – Pressure Relief Valve, PPM – Planned Preventative Maintenance, OFN – Oxygen Free Nitrogen, AHU – Air Handling Unit, GWP – Global Warming Potential, VRF – Variable Refrigerant Flow, VRV – Variable Refrigerant Volume, ACU – Air Conditioning Unit, FCU – Fan Coil Unit, AC – Air Conditioning, HP – High Pressure, LP – Low Pressure