When using fan coils with MasterTherm Heat Pumps, they must be based/sized on the following water design temperatures.

Heating mode: +25 to +50°c

DEAD ZONE: +20 to 25°c

Cooling mode: +20 to +6°c

The change over temperature for heating is 25°c and 20°c for cooling.

The fan coils must be based on a 2 pipe system and must have the internal water thermostat set to operate at the above temperatures. The fan coils must be equipped with internal motorised valves.