Hello this is my first post on here and it might be a long one
I have an open vented system that must be well over 20 years old running 4 radiators (2 up, 2 down) using a Baxi back boiler. I know that the best option is to replace it but the house is being renovated and extended so im trying to keep it running for another year or so when the extention is finished.
anyway, the system has a timeswitch that gives the option of HW/CH on or off only. the whole system stopped working a few months back, no heating or hotwater. I had a snoop around and i spotted the mid position valve looked to be the culprit. so i brought a Honywell V4073 valve to replace the ancient Motortrol unit. I presumed it would be a simple swap but things never work out like you plan, huh! after cutting off the old unit because it had corroded on i managed to rig the new one up. I then thought it would be a simple swap on the wiring but the old unit had 3 wires and the new one has 5! any idea how this should be wired?
I spoke to the people at Grahams down the road and we came to the conclusion that i could run the valve in the manual open position because as far as i can tell its not doing anything other than acting as a T junction. Unfortunatly the system still doesnt work. Ive taken all 4 rads off and flushed all the sludge out of them and replaced the pump as i wondered if this was the problem but still nothing. Hot water is getting to the pump but its not ciculating to and from the rads.
Now im thinking the fact that i havent got the mid position vavle wired up is causing the problem so im back to the 3 verus 5 wiring issue.
ive probably missed other bits of info but if you can help me it will be greatly appreciated.
Mark.
I have an open vented system that must be well over 20 years old running 4 radiators (2 up, 2 down) using a Baxi back boiler. I know that the best option is to replace it but the house is being renovated and extended so im trying to keep it running for another year or so when the extention is finished.
anyway, the system has a timeswitch that gives the option of HW/CH on or off only. the whole system stopped working a few months back, no heating or hotwater. I had a snoop around and i spotted the mid position valve looked to be the culprit. so i brought a Honywell V4073 valve to replace the ancient Motortrol unit. I presumed it would be a simple swap but things never work out like you plan, huh! after cutting off the old unit because it had corroded on i managed to rig the new one up. I then thought it would be a simple swap on the wiring but the old unit had 3 wires and the new one has 5! any idea how this should be wired?
I spoke to the people at Grahams down the road and we came to the conclusion that i could run the valve in the manual open position because as far as i can tell its not doing anything other than acting as a T junction. Unfortunatly the system still doesnt work. Ive taken all 4 rads off and flushed all the sludge out of them and replaced the pump as i wondered if this was the problem but still nothing. Hot water is getting to the pump but its not ciculating to and from the rads.
Now im thinking the fact that i havent got the mid position vavle wired up is causing the problem so im back to the 3 verus 5 wiring issue.
ive probably missed other bits of info but if you can help me it will be greatly appreciated.
Mark.