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4
Maintenance
Inspection of the electrical
connections and of the heating
element and thermostat set by a
specialised technician is strongly
recommended, at maximum
intervals of 2 years.
Ensure that the electrical capacity of
the house is sufficient for the
correct operation of the heating
element together with the other
appliances already in use.
The PTR valve should be periodically
bled to remove metal filing deposits
or other types of dirt and check if
the purge valve is not obstructed.
Restarting the power supply
Check the need to restart the
heating system.
B Press the restart pin on the safety thermostat
(
Fig. 9, position 1).
Draining the system
Be aware that there is scalding risk
and that the roof top might be
slippery.
B Switch off the electrical supply by using the
breaker.
B Close the water flow.
B Open a hot water tap.
B Open the safety valve purge.
TSS
Maintenance | 9
6 720 644 138 (2011/09)
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