How to Replace a Heat Pump Compressor

What You'll Need

If you wish to replace the heat pump compressor, you can complete the process very easily. The heat pump compressor can sometimes be too heavy for one person, so it is a good idea to have some assistance organized, or you will find that the pump itself will be further damaged when you try to replace it. The compressor is a vital part of the heat pump, sometimes described as its 'heart', and if you try and remove it without being very careful, you will cause damage to other parts of the pump, and you may find that you need to replace the whole of the heat pump in the end. Once you have the old compressor out, you will need to install a new version, and this also needs to be done delicately.

Step 1 - Remove the Old

In order get the old compressor removed, you will need to detach all of the wires and pipes which connect it to other parts of the heat pump. Make sure that the pump is turned off from the mains power supply, and then take off the pipes. There will be a series of pipes which are connected below the compressor, and these must all be unscrewed slowly, and placed to one side. You might want to make a note of where these pieces are in relation to each other, as putting the wrong pipe onto the new connection would prevent your pump from working, and may damage it. Remove all of the pipes using the wrench, and then take off the wires using your screwdriver to open the connections. Using your assistants, take the compressor off of the pump, and place it on to the floor.

Step 2 - On with the New

Once you have removed the old heat pump compressor, you should place the new one on top as quickly as you can. The longer you leave the time between removing the pipes, the more likely you are to forget where each one went. Start by screwing the pipes back onto the system. You should have five pipes, the Flow to heating system, the return from the heating system, the supply from the ground, and the return to the ground. A smaller pipe at the side is the cold feed, which is vital to the system. Tighten all of the pipes with the wrench.

Step 3 - Wiring Up

Replace the wires.This should be a fairly easy task if your new compressor comes with an instruction manual, as you will be able to find the location of the live connection, and so on. If you do not have  manual, then it may well be worth trying to find one online, as they can be vital. If you have not had any luck finding one, then you should use the key on the connections themselves, red wire to a red mark, for example.