27
Control of any 3-way valve for the DHW circuit
The fireplace heating system control unit (supplied on request
with he fireplace heating system) is equipped with a control as
per standard for any motorised 3-way valve to be installed on the
domestic hot water circuit. The control unit electric control board
has three clamps (VALVE) to be used to control this 3-way valve.
The three clamps on the electric control board have the following
function:
N
=
COMMON TO 3-WAY VALVE
L
ON
=
FIREPLACE HEATING SYSTEM SIDE
L
OFF
=
GAS BOILER SIDE
Below find a connection example using a 3-way valve with spring
return. Remember that the hydraulic connection must be made in a
way that when the valve is at rest, the water passes from the gas
boiler. Only when the fireplace heating system temperature is
sufficient (value set on the valve thermostat), the 3-way valve is
powered and therefore closes the gas boiler circuit and opens the
fireplace heating system circuit.
cl
am
p
L
O
FF
Earth
cl
am
p
N
cl
am
p
L
ON
3-WAY VALVE
