Dman2
Member
- Location
- Durham, UK
The loop on a combi boiler is to keep the sealed side up to pressure, not the DHW side
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Your obviously not grasping what i am doing.
I am not touching the sealed side of the system or planning to couple mains water up to it.
I am installing a heat exchanger which has 2 parts to it.
1 the side that that the heat is pumped through which will be part of the sealed system
2 the part that cold water will be fed through from the mains which will come out if the other end hot and be fed to the taps.
There will be no connection between the 2 sides other than the transfer of heat from one side to the other
The loop on a combi boiler is to keep the sealed side up to pressure, not the DHW side
Apologies @UkjayI did not say the loop was for the DHW side - the DHW side is not connected in that way?
The closed loop pressure is set by the circuit being fully closed when you close shut off valve on the fill loop after you fill to the designated pressure as set in the MI's (then the fill loop should be removed if you follow the guidance correctly) - thus has no connection to the mains whatsoever.
This then has an expansion tank - pressure relief valve etc to protect the system from over pressurisation and controls the system pressure.
Anyway - its your call, your installation. I only offered some advise from what I have learnt and what the regs say
Apologies @Ukjay
Didnt read your reply correctly
A lot of manflu here so not getting a lot of sleep
Appreciate the advice