Safety devices
The boiler GASTER 56 N AW is equipped with devices that guarantee safety in case of
operation faults.
Automatic-reset temperature limiter (safety thermostat)
This device prevents the water temperature in the system from exceeding boiling point.
The maximum cut-in temperature is 110°C.
Automatic reset of the temperature limiter can only occur with cooling of the boiler (the
temperature must drop by at least 10°C) and identification and consequent elimination
of the problem that caused the shutdown. The safety thermostat (detail 7 of fig. 1) is lo-
cated inside the control panel.
Fume sensor safety device (fume thermostat)
The boiler is equipped with a fume evacuation control device (fume sensor - ref. 3 of
fig. 1). In case of anomalies in the fume evacuation system with consequent return of
burnt gases in the room, the unit shuts down. The anti-wind hood is equipped with a tem-
perature sensor bulb for measuring and controlling the fume temperature.
Any leakage of burnt gases in the room causes a temperature increase detected by the
bulb, causing the boiler to shut down within 2 minutes and stopping the gas to the burner.
If the fume sensor cuts in, unscrew the protection cover (ref. 3 of fig. 1) located on the
control panel and manually reset the device. The boiler will start working again.
If the sensor has to be replaced due to a failure, only use original accessories and ensure
that the electrical connections and bulb positioning are correctly carried out.
B
THE FUME SENSOR MUST NOT BE CUT OUT FOR ANY REASON!
Opening the front casing
To open the boiler front panel, see the sequence in fig. 4.
fig. 4 - Front panel opening
B
Before carrying out any operation inside the boiler, disconnect the power and
close the gas cock upstream.
14
EN
1
2
cod. 3541A171 - Rev. 01 - 03/2018
Cleaning the boiler and flue
For proper cleaning of the boiler (see fig. 5):
•
Close the gas cock ahead of the boiler and disconnect the electrical power
•
Remove the front panel of the boiler (fig. 4).
•
Lift the casing cover.
•
Remove the insulation 5 covering the anti-backflow device.
•
Remove the smoke chamber closing plate.
•
Remove the burner assembly (see next section).
•
Clean from the top downwards, using a flue brush. The same operation can be car-
ried out from the bottom upwards.
•
Clean the fume evacuation ducts between the cast iron elements of the boiler shell
with a vacuum cleaner.
•
Carefully refit all the previously disassembled parts and check the tightness of the
gas circuit and the combustion ducts.
•
During cleaning operations take care not to damage the fume thermostat bulb fitted
on the back of the fume chamber.
5
2
3
fig. 5 - Cleaning the boiler
1
Casing cover
2
Smoke chamber closing plate
3
Flue brush
4
Combustion analysis plug
5
Insulation
GASTER 56 N AW
1
4