Radiator Valve with Gravity System
My system is set as “Gravity Fed”, controlled by a wireless air thermostat which (correctly) turns on both the Hot Water Relay and the Pump Relay when thermostat requires.
I have now fitted a Thermostatic Radiator Valve in an another room from where the air thermostat is fitted. This turns on and off the pump relay when required, but does not switch the Hot Water relay.
How do I set up the system, so that the radiator valve switches both relays, otherwise it pumps round cold water!?
Answers
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@DocFlight As we understand it, the normal call for heat first comes from your existing wireless thermostat. These normally have two components:
- The wireless sensor which transmits to the receiver calls for heat when needed. This only communicates with its wired receiver.
- A wired receiver which responds to commands from the wireless thermostat. This is normally wired directly into the boiler's controls. However in your case it seems that the wireless receiver is also wired into a wiring centre, which does the following:
- It switches on the central heating pump
- It commands a call for heat from the boiler.
You've also stated that a radiator valve is present elsewhere, which has the capacity to turn on the pump by itself. Thats unusual, very unusual. It likely passes on its request to turn on the pump through the wiring centre - but whoever wired that valve in, did not use the main wiring centre.
I would suggest you look at the wiring centre and get an electrician to ensure that when the radiator valve turns on SWITCHED LIVE, that that command goes to the same place as the other thermostat, not directly to the pump on its own.
There is however a little confusion in my head. Whats this got to do with Tado kit?
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