B
bennjy
Hi
I've installed the electrics for an underfloor heating system. The system has 6 manifolds each with a small pump. There is then a primary pump that pushes hot water through the system from an aerobic digester next door. I have fitted 6 contactor each using a switch wire from the thermostat to energise terminal 1 of the contactor, I have then linked from terminal one to a of the coil. I've taken a neutral to all contactor in parrelal in terminal 2 then from 2 to a2 of each contactor. I've then connected in parrelal the primary pump to terminals 3 and 4. This works fine with one stat, when it calls for heat aswell as energising the secondary manifold pump it also energises the contactor and energises the primary pump. The problem is, is that when another stat calls for heat if the other stat goes off the contactor still stays energised until all stats are off. I don't think it's latching contactor I'm sure there non latching could be wrong tho. I'm sure it's a wiring fault so any help would be great .
I've installed the electrics for an underfloor heating system. The system has 6 manifolds each with a small pump. There is then a primary pump that pushes hot water through the system from an aerobic digester next door. I have fitted 6 contactor each using a switch wire from the thermostat to energise terminal 1 of the contactor, I have then linked from terminal one to a of the coil. I've taken a neutral to all contactor in parrelal in terminal 2 then from 2 to a2 of each contactor. I've then connected in parrelal the primary pump to terminals 3 and 4. This works fine with one stat, when it calls for heat aswell as energising the secondary manifold pump it also energises the contactor and energises the primary pump. The problem is, is that when another stat calls for heat if the other stat goes off the contactor still stays energised until all stats are off. I don't think it's latching contactor I'm sure there non latching could be wrong tho. I'm sure it's a wiring fault so any help would be great .
