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hi,
Ok so have a 4 bedroom house.
Vaillant System boiler 637
No rads just underfloor heating. 3 x manifolds and nothing too big.
UV hot water tank.
Client complained that UFH has never worked properly.
I found system to be surprisingly dirty. Pumps knackered.
I replaced all manifold pumps, pump on boiler, removed actuators, replaced balancing valves and flow meters. Through all of these steps it always produces a new problem.
The issue I have is that the boiler keeps cutting out. Apparently it’s noticibg to small a differential temperature on flow and return. I’ve added a bypass to system which hasn’t helped. It will ramp up to 70 when asking for 60 and cut out. There’s no restriction on the system and Vaillant can’t give me an answer. Seems as though heat exchanger ok, but thing won’t stay lit. I’m at wits end. I understand that UFH has never known to work by client so I’m in the clear there but really do t want them to spend all this money and I can’t get it up and running. If anyone can help me brainstorm this one I’d be much appreciated.
Ok so have a 4 bedroom house.
Vaillant System boiler 637
No rads just underfloor heating. 3 x manifolds and nothing too big.
UV hot water tank.
Client complained that UFH has never worked properly.
I found system to be surprisingly dirty. Pumps knackered.
I replaced all manifold pumps, pump on boiler, removed actuators, replaced balancing valves and flow meters. Through all of these steps it always produces a new problem.
The issue I have is that the boiler keeps cutting out. Apparently it’s noticibg to small a differential temperature on flow and return. I’ve added a bypass to system which hasn’t helped. It will ramp up to 70 when asking for 60 and cut out. There’s no restriction on the system and Vaillant can’t give me an answer. Seems as though heat exchanger ok, but thing won’t stay lit. I’m at wits end. I understand that UFH has never known to work by client so I’m in the clear there but really do t want them to spend all this money and I can’t get it up and running. If anyone can help me brainstorm this one I’d be much appreciated.