HCC80R with zone valve and/or mixing pump

[rvb99]

I guess this is more a general UFH question than specific to evohome but here goes,

Currently I have the system set such that the HCC80R controls the UFH feed supply zone valve (4043) only. The UFH mixing pump runs continuously, irrespective of the HCC80R demands. Currently the system works great and no complaints with respect the Evohome set up and operation.

Since the room is large 70m2 (with 5 hydraulic circuits), my original thinking was that by keeping the ufh mixing pump running it would better and continuously harmonise the floor temperature, even when there was no heat demand.

However, what is usual practice ? would it be better to switch the pump on and off with the zone valve. The pump is practically silent so I guess the main advantage would be extended pump life ?

for info the complete UFH has a 7 port manifold with 5 ports( each with an actuator) feeding one large room and 2 ports/actuators feeding a smaller room. The evo home is set such that HCC80R zones 1 and 2 (the 5 actuator take offs for the large room) are controlled by one evo controller zone and zones 3,4 of the HCC80R (the 2 actuators for the small room) are controlled by another separate evocontroller zone. Temperature sensor is a YRF87.

any advice / ideas

thanks

Richard

[Richard]

Normally the HCC80R controls the pump, motorised zone valve and thermal actuators.

Fitted many like this (this is how it should be done) with zero issues.

Thanks,

Richard