Air Source Heat Pumps

Air Source Heat Pumps

Our valued client approached us with the objective to decarbonise the heating systems by introducing energy efficiency improvements within their customers facility.  These energy and carbon savings are achieved through the removal of gas fired boilers and the installation of air source heat pumps.

       

The benefit of replacing the gas fired boilers with an ASHP installation mainly comes from savings of kWh consumption and carbon emission, by replacing the gas supply to electricity supply.

Space Engineering were responsible for the specific management, programming, detailed design, supply and installation, integration, testing and commissioning of the equipment.

The first phase of works was the strip out of existing gas fired boilers including primary pipework and pumps, gas fired hot water calorifier, radiators, mechanical power supplies and mechanical control panel.  As this was a live environment, we retained the existing gas fired hot water calorifier until the end of the project to maintain the school with hot water supplies during the construction period. 

       

The Air Source Heat Pumps selected and installed were 3No Mitsubishi CAHV-R450YA ASHP’s.  This included:

  • condensate drainage
  • 1No 1,500L buffer vessel with  associated primary plant
  • Radiators
  • Trace heating of external pipework
  • 1No 800L hot water cylinder including LTHW coil and immersion heaters
  • Heat meter
  • Electrical meters
  • Mechanical power supplies
  • Mechanical control panel. 

       

Both electricity meters and heat meters were installed for each heat pump system, to allow for measurement and verification.  All installed meters were connected to an online platform which automatically logs the kWh data.

Part of the switch room works included the removal of the existing distribution board, replacing it with a new 12way 160A TPN distribution board.  This serves the original combi oven and the new ASHP’s, as well as a new 160A tap off. 

       

We allowed for the replacement of all actuators and motorised valves for the primary and secondary circuits within the plantroom.  All primary pipework was flushed and dosed, and the top up of water and inhibitor for water lost when replacing the radiators was included. 

The project was a success and has led to further ASHP installation works for our client.

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