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Installation of over door heat pump systems
Posted 30 March 2011
Job Description:
Installation of over door heat pump systems. I am looking for a business to replace my existing over door heaters with new thermo-screen units (as specified). These new units will need to be fully supported within the ceiling void through an access that will be cut by others (600mm x 3000mm). The running and connection of the refrigerant pipe work will need to be carried out through the same access and along with all power cabling and data cabling, which will be run through to one of the plant rooms recently stripped out of all ducting, down a service void and out into the mall (total run is about 15/20mts). The BC controller will be mounted horizontally on the back wall of the plant room and all pipe work and cabling will be run on cable tray to the plant room below where it will need to be secured on cable tray. Pipe work from condensing unit will be run through a 200mm weather proof cowl on the roof (the ducting will be supplied by us, but will need to be fabricated and cut into the new wooden roof detail). A safety cage may need to go around the BC controller to keep personnel and materials away from the controller and pipe work, and this again will be supplied by us as necessary. The condensing unit will be mounted on the flat weather proofed cover that has recently been installed following the removal of the old AHUs. This condensing units (2 x PURY P-250 – see schematic) will be supported on 40x40mm big foot system which has already been purchased by us, but will need to put together by you as part of the works. As the new heaters have an open return we will have to make up some transition duct work pieces so as to separate the supply and return. (I have supplied a small sketch to show what I mean). You will need to include for: All installation materials including, containment, Supports Gases – OFN and refrigerant Ductwork where required Interconnecting cabling (no BMS connections) Load side electrical connections Access (scaffolding) Certification upon completion Labour of which some will need to based on out of hours working in the mall areas. Exclude as done by others: Live side connections to condensing unit and over door heaters. Builders works or the making good of the ceiling on completion. Fire barriers between plant room and mall. Bigfoot support system (supplied by us but put together by yourselves) Mitsubishi AC Systems (supplied by us but installed by yourselves).
Services Required:
  • Air Conditioning
  • Builder
Estimate required for:
  • Labour only
Success Criteria:
  • Accuracy of estimate (versus invoice)
  • Estimate quickly provided
  • Experience and references
  • Price
  • The quality of the finished job
Location: Milton Keynes
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