To control the heating temperature, the EMR will operate a 24Vac/6VA powered modulating control valve via a 0-10V DC control signal. The valve can be a two port type that allows water to be injected into the under floor circuit, or a three or four port valve that allows water to be mixed from the boiler circuit down to the under floor circuit in the correct proportion.
- 0-10V output for actuator
- Relay for pump and boiler
- Timed overrun of pump
- LED indication of sensor error
- Night setback
- Frost protection
- Limitation of supply or return temperature
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