Powerflush with GSHP

Strummer22

We had a slow leak on our central heating for a while, which suddenly became a fast leak (about 1 bar every 10 hours). Can't find evidence of a leak anywhere. I called a leak detection company. They advised a power flush because leak sealant has previously been added to the system, which can interfere with leak detection techniques..

We have a GSHP. Can the powerflush be done as normal, or does anything special need to be done to protect the HP? I think I can see how the HP could be isolated. Dr Google has not been very helpful with this query BTW. 

Any experience/advice welcome. 

QrizB

For clarity, the leak is on the "central heating" side of the heat pump, and not on the "ground loop" side?

Strummer22

@QrizB yes that’s right

QrizB

In that case, yes, in my opinion it shouldn't need anything special doing.

matelodave

I think I'd be inclined to try and flush the heating system with the heat exchanger isolated and then do the heat exchanger on its own rather than trying to flush all the heating system and radiator crud through the heat exchanger.
 Its amazing how much debris can accumulate in a heating system and it would be better to try and keep it out of the heat exchanger if possible