Safety devices of the water heater:
Main Safety thermostat
(G1)
The main safety thermostat (G1) breaks the
control circuit when the w
ater temperature is too
high (>92°C ±3°C). The main safety thermostat
also protects the heating elements when the water
heater is activated when it is not filled with water.
The main safety thermostat (G1) probe is installed
above the middle element of the highest row. You
can use the white button on the thermostat body
to manually reset the thermostat when the water
temperature has dropped (<83°C). Make sure the
water heater is completely filled with water before
resetting the thermostat.
Row Safety thermostat
(G2)
The row safety thermostat (G2) breaks the
circuit (L1 and L2) of each row of elements when
the temper
ature of the water becomes too high
(>93°C ±3°C) due to a failure in the control
circuit. You can use the red button to manually
reset the thermostat when water temperature has
dropped (<83°C).
Thermal fuse The thermal fuse is integrated in the wiring of the
main safet
y thermostat (G1) and breaks the
control circuit when it detects overheat of the
element area. The thermal fuse cannot be reset.
The complete wiring, with thermal fuse, must be
replaced.
Safety devices of the installation:
Expansion vessel The expansion vessel temporarily stores expansion
w
ater to keep the pressure in the installation at the
correct level.
Expansion valve The expansion valve prevents excessive pressure in
the tank of the w
ater heater.
Pressure-reducing valve The pressure-reducing valve reduces the water
mains pressure, if necessary
.
Temperature and
pressure relief valve
(T&P valve)
(1)
The T&P valve prevents excessive pressure and
temper
ature in the tank.
1- All installations have a T&P valve connection. The use of a T&P valve is mandatory.
30 Installation, Maintenance and Service part
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