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
BG Multi Head III pump
The problem:
I cannot run the CH on its own. HW is fine, and HW and CH is fine (but i am not convinced of this as i suspect that the HW side is running the boiler and pump).
The detail:
When my programmer is set to CH only the system does not work, i get no heating, the pump does not operate and the boiler does not come on (no lights at all including the power light), however, the thermostat 'clicks' (nothing actually happens though) and the programmer CH light is on.
In HW Only setting everything works (boiler lights up and pump runs).
I have checked the wiring for the thermostat and it appears to be ok, i tried to 'test' the thermostat by linking the Live and Call and then turning the system on - No difference still not working in CH mode.
I have checked the wiring for the actuator and while everything checks out the actuator did not move when i tested it (by selecting HW,CH and both from my programmer) off the valve. Could this be it? But if so would this stop the pump from running?
I thought it might be the programmer so bought a Drayton LP522 programmer but it made no difference.
The pump operates in HW mode so i guess i hope someone can tell me why the pump and boiler are not operating when in CH mode.
if there is anything else needed please ask as i am getting desperate as i am going away tomorrow!
cheers for any advice
My system:
Potterton Suprema HE boiler
Drayton thermostat
Horstmann centaurplus C27 programmer
3 port valve with a BGMVSP-23 actuator
BG Multi Head III pump
The problem:
I cannot run the CH on its own. HW is fine, and HW and CH is fine (but i am not convinced of this as i suspect that the HW side is running the boiler and pump).
The detail:
When my programmer is set to CH only the system does not work, i get no heating, the pump does not operate and the boiler does not come on (no lights at all including the power light), however, the thermostat 'clicks' (nothing actually happens though) and the programmer CH light is on.
In HW Only setting everything works (boiler lights up and pump runs).
I have checked the wiring for the thermostat and it appears to be ok, i tried to 'test' the thermostat by linking the Live and Call and then turning the system on - No difference still not working in CH mode.
I have checked the wiring for the actuator and while everything checks out the actuator did not move when i tested it (by selecting HW,CH and both from my programmer) off the valve. Could this be it? But if so would this stop the pump from running?
I thought it might be the programmer so bought a Drayton LP522 programmer but it made no difference.
The pump operates in HW mode so i guess i hope someone can tell me why the pump and boiler are not operating when in CH mode.
if there is anything else needed please ask as i am getting desperate as i am going away tomorrow!
cheers for any advice