+ Q: The power, pump, valve and boiler lights are coming on, but the system is still not heating up. What is the issue?
A: There has been a fault with some UB10s where the switching does not occur, so everything can be wired in correctly but still does not turn the system on. This would require a replacement.
+ Q: What is the red wire on the valve terminals linking between the Or (Orange) and Gr (Grey)?
A: This is a link wire. It should stay on the board if you are not using a local zone valve, such as if it is being controlled by the heat source. If you have a local zone valve, this link can be removed, and the Or and Gr from the valve should be wired in.
+ Q: Do I need the wiring centre to be wired into the boiler?
A: Yes. This is to let the boiler know when the UFH requires hot water.
+ Q: Can I use a wireless relay to link to the boiler?
A: Yes. This would be possible, but untested currently.
+ Q: Do I need a local zone valve wired into the wiring centre?
A: Usually, yes. A zone valve should be used in order to allow the wiring centre to control if water is being let into the system. You may not need this if it is being controlled by the heat source such as a heat pump.
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