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Discuss Care home UFH wired incorrectly in the Water Underfloor Heating Installations area at PlumbersForums.net

I’m an electrician, a plumber has asked me to look at wiring in a care home for UFH with a system boiler.
Only way to get it to work is run everything constantly.
The wiring center was a mess, i’ve rewired and now working as expected.
However, it appears to me there is an unnecessary valve. On the heating side there is a master valve (S-Plan), then behind this two manifolds with thier own valves. The master valve was wired to be constantly open.
I’ve rewired for it to only open when one of the UFH valves is calling for hot water.
I’ve been told UFH was installed by one company and boiler by another. So I wonder if boiler engineer installed S-Plan, and UFH just fitted to this.
I can’t see any reason for the master valve (S-Plan). I’m gonna suggest to plumber to remove as I just can’t see any reason for it and I think this will simplify installation, what do you think, am I missing something.
To be clear I’m ignoring hot water in this post, that all works fine.
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer

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