First Fix

First fix started on 27th April 2011. After identifying the locations where the new system will link with the old, Paul has run the first of the pipes, and the first three pumps for the system. At the bottom left, with a mapgas canister leaning, on it is the heat exchanger.

This is a braised plate heat exchanger supplied by uk-exchangers.com. This device is used to provide the domestic hot water. The left hand side of it will connect to the thermal store, which in the old days would have been your boiler. The cold water passes through the right hand side, and because the heat exchanger is so efficient, it reaches to within 1c of the temperature of the water coming from the thermal store.

So far there are three pumps. The two by the door will control the flow from the two Sanyo heat pump units which will sit outside the wall on the right. The third one will circulate water from the thermal store through the heat exchanger.