Hello all.
Bit long but I want to include everything.
Whilst heating system *appears* to be working okay my motorised valve isn't happy if HW & CH demanded together. It continues to click every 2-3 seconds - surely this isn't right. Or is it ??
It switches across to CH is that's all that is req'd. Works on HW as req'd. On both seems to do both. Small plastic lever moves okay when operated electrically. If on HW I can move it manually to CH too and it starts to warm the rads - it returns to HW as expected.
I can't tell the model of the valve as tight for space and faces into a wall! I don't even know if it is a true 3-way or just a 2-way valve. It has a 4-core plus earth cable at the junction box nearby.
System is older style boiler (Elan xxx), micro-proc controller, hot tank, pump & valve, tank stat and room stat. As fitted/programmed it does not run CH without HW enabled. If both are demanded, both work but when HW is warm enough it does shut down before CH resumes on its own.
I'm sure unrelated but a while ago we had 2 long power cuts and the controller gave me grief as the internal battery died and getting into the controller was something of a challenge (nearly used the hammer). All better now (though must change that battery still) but I have been 'in there'.
Small (70k) pic of the airing cupboard pipework is at http://www.hiddengems.btinternet.co.uk/hosting/heating1.jpg is anyone can clarify my unknowns. Not tackled the current wiring diagram yet ! Other than I seem to have a change-over type tank stat which surprised me.
Bit long but I want to include everything.
Whilst heating system *appears* to be working okay my motorised valve isn't happy if HW & CH demanded together. It continues to click every 2-3 seconds - surely this isn't right. Or is it ??
It switches across to CH is that's all that is req'd. Works on HW as req'd. On both seems to do both. Small plastic lever moves okay when operated electrically. If on HW I can move it manually to CH too and it starts to warm the rads - it returns to HW as expected.
I can't tell the model of the valve as tight for space and faces into a wall! I don't even know if it is a true 3-way or just a 2-way valve. It has a 4-core plus earth cable at the junction box nearby.
System is older style boiler (Elan xxx), micro-proc controller, hot tank, pump & valve, tank stat and room stat. As fitted/programmed it does not run CH without HW enabled. If both are demanded, both work but when HW is warm enough it does shut down before CH resumes on its own.
I'm sure unrelated but a while ago we had 2 long power cuts and the controller gave me grief as the internal battery died and getting into the controller was something of a challenge (nearly used the hammer). All better now (though must change that battery still) but I have been 'in there'.
Small (70k) pic of the airing cupboard pipework is at http://www.hiddengems.btinternet.co.uk/hosting/heating1.jpg is anyone can clarify my unknowns. Not tackled the current wiring diagram yet ! Other than I seem to have a change-over type tank stat which surprised me.