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- Apr 26, 2017
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Please advise,
I have a ufh system in use for 17 yrs and in the past has run well but now seems to be struggling to maintain room temp.
The rest of the circuit (upstairs and DHW) work ok suggesting the pumps are working ok
I have removed the manifold circuit valves and checked operation all are working good, no sticking spindles and actuators control open / shut as required
Always kept the water inhibitor level higher than required.
I have just changed the TMV as the previous one failed allowing excess temp into the manifold.
Does the above suggest a partial blockage? Or is there something I have missed?
Thanks for any assistance
Paul C
I have a ufh system in use for 17 yrs and in the past has run well but now seems to be struggling to maintain room temp.
- Eleven manifold zone valves run at around one / two litres/ min with one running at three when all fully open, they used to run higher in the past.
The rest of the circuit (upstairs and DHW) work ok suggesting the pumps are working ok
I have removed the manifold circuit valves and checked operation all are working good, no sticking spindles and actuators control open / shut as required
Always kept the water inhibitor level higher than required.
I have just changed the TMV as the previous one failed allowing excess temp into the manifold.
Does the above suggest a partial blockage? Or is there something I have missed?
Thanks for any assistance
Paul C