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Boiler programmer replacement help
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cbrpaul
Posts: 756 Forumite
More of a question to any plumbers on here I think.
I have an old ( but reliable) back boiler , it has x2 flow and returns circuits , 1 for DHW and 1 for the CH coming from the rear of the boiler , and each circuit has a separate pump,
So my question is ,
when I replace my faulty programmer do I have to interlock the CH with the DHW so that you cant have CH on its own on the programmer ? , im thinking no, if they are both separate pumps switched independently.
The current faulty mechanical programmer seems to be set to interlock, but as there is 2 pumps, 1 for each circuit im wondering if this interlock is needed?
Any advice greatly accepted
thankyou
:beer:
I have an old ( but reliable) back boiler , it has x2 flow and returns circuits , 1 for DHW and 1 for the CH coming from the rear of the boiler , and each circuit has a separate pump,
So my question is ,
when I replace my faulty programmer do I have to interlock the CH with the DHW so that you cant have CH on its own on the programmer ? , im thinking no, if they are both separate pumps switched independently.
The current faulty mechanical programmer seems to be set to interlock, but as there is 2 pumps, 1 for each circuit im wondering if this interlock is needed?
Any advice greatly accepted
thankyou
:beer:
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