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Heating, return
Piping to transfer the water returning from the radiators, underfloor heating and air supply unit to the heat
exchanger.
Heating circuit filling
Valve for filling the radiator, underfloor heating and air heating circuit. Fill the network by opening both
consecutive shut-off valves until the network has reached the correct pressure value. When the network is
full, close both filling shut-off valves.
Record the filling date. If you need to fill the network repeatedly, either the network has leaks or the pre-
charge pressure of the expansion tank has decreased.
Heating circuit pressure gauge
The heating circuit pressure gauge measures the static pressure in the network.
Heating, safety valve
The safety valve prevents the pressure in the heating circuit from rising too high. It is a spring-loaded valve
whose opening pressure is 2.5 bar. We recommend that you check the valve for proper operation yearly.
Heating, circulation pump
The heating circulation pump circulates water in the heating circuit. The pump is of the wet motor
structure.
The installation technician selects the pump pressure according to the site plan to achieve the desired flow.
The pump must be stopped if there is no pressure in the network. Stopping the pump for the summer is not
recommended. See also the attached circulation pump instruction manual.
G-Power 2/100, 2/150 and 2/200
P2
G-Power 3/100
P2 and P3
Heating, return water temperature sensor
Measures the temperature of the water returning from the network, which can be seen on the controller
display.
G-Power 2/100, 2/150 and 2/200
TE2C
G-Power 3/100
TE2C and TE3C
Control valves
The domestic hot water balancing valve (TV1) controls the district heating water flow in the domestic hot
water heat exchanger according to the signals from the controller.
The heating balancing valve (TV2, TV3) controls the heating supply water temperature according to the
signals from the controller.
G-Power 2/100, 2/150 and 2/200
TV1 and TV2
G-Power 3/100
TV1, TV2 and TV3
Summer shut-off valve
The shut-off valve stops the district heating flow in the heat exchanger for heating. By closing the heating
summer shut-off valve unnecessary heating of the building during the summer can be avoided.
