UPDATE
I got a Drayton MA1 complete with valve and actuator. Used the new actuator and wired into a JB so that it will be easier if i ever have to do this again. Turned it on to CH and.......
IT WORKS!!!! :D
Thanks to everyone who helped me diagnose this and sort it out.
Matt,
yes the rads do get hot even if it is set to HW only, i have noticed that the actuator (and so the valve) is set in the Mid position so this would be expected? wouldn't it?
it is taking a little while for the system to cool down a bit (it is hot because i was testing in the HW and CH mode and didnt turn it off because the wife was cold!).
While im waiting... is there any logic to central heating systems?? i do not know how you guys manage to work half these things...
Matt,
if the contacts fail to make on the actuator, will that stop the pump from running?
Matt,
i will check the HW only setting and test the radiators. will reply to this one in a couple of mins
and... yes the thermostat is set at 30 (max) for test.
Oops also meant to say i moved the valve about 20 degrees, i understand that this is about normal? it moved using hand power only so if 20 degrees is normal then i think the valve is ok.
Thank you for replying.
I have taken off the actuator and tbh the only way i could think of testing it was to turn the heating/water and combinations therein on and watching to see if the actuator moved...it didn't. So does this mean the actuator is U/S and if so would that stop the pump from...
Can any one help? Please? I have a problem with my central heating system and i have searched through the archives but i still haven't fixed the problem.
My system:
Potterton Suprema HE boiler
Drayton thermostat
Horstmann centaurplus C27 programmer
3 port valve with a BGMVSP-23 actuator...