I have been wiring a heating system. The main hot water tank is heated by an oil boiler, a multifuel rayburn, some solar panels, and an electric immersion. There are 4 seperate heating zones including two underfloor with network stats and a separate circuit for towel rails.
This is not like any of the more straight forward systems I've done in the past!
All is now wired and seems to be working correctly but I have one issue left to solve: There is a high limit pipe stat which is designed to open all zone valves (overiding the room stats) should the tank temperature exceed about 85 degrees. However, I can't just connect this to the zone valves (brown wire) as this will just open all the valves during normal operation regardless of whether the zone stat is calling for heat or not. Therefore, I need some sort of relay which will have at least 4 separate outputs, un-connected to each other which will operate simultaneously when the high limit stat operates.
I've not much experience with relays so any help to determine which relay with do the job and where to get it would be appreciated....
This is not like any of the more straight forward systems I've done in the past!
All is now wired and seems to be working correctly but I have one issue left to solve: There is a high limit pipe stat which is designed to open all zone valves (overiding the room stats) should the tank temperature exceed about 85 degrees. However, I can't just connect this to the zone valves (brown wire) as this will just open all the valves during normal operation regardless of whether the zone stat is calling for heat or not. Therefore, I need some sort of relay which will have at least 4 separate outputs, un-connected to each other which will operate simultaneously when the high limit stat operates.
I've not much experience with relays so any help to determine which relay with do the job and where to get it would be appreciated....
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