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11/07/00
COMBUSTION CHAMBER
It is placed in the lower part of the appliance and holds
the atmospheric burner, flame control sensor
(thermocouple) and the pilot burner with ignition elec-
trode.
1.4 CONTROL AND SAFETY DEVICES
MAGNESIUM ANODE
The water heater is protected against metal-to-metal cor-
rosion by a magnesium anode. It has to be replaced every
year in order to extend the working life of the appliance.
The anode is placed in the inspection flange, on the front
of the tank.
fig. 1.4 / 1
Anode position
GAS VALVE
It is GASTEC approved following the EN 126 regulation.
It is a multi-functional valve with on-off gas flow control
with double electro-valve. The operation happens through
one of 3 positions of control (ignition-working-
extinguish).
The inlet and outlet gas connections are threaded 1/2 RP”
UNI-ISO 7, whereas the fitting for the thermocouple is
M9x1. There also are two (inlet and outlet) Two pressure
test point are in the inlet and outlet. Gas valve has a gas
filter at the entry.
fig. 1.4 / 2
Gas valve
All the setting and regulation operations have to be made
by professional qualified people. In case of valve replace-
ment, be sure that the gas flow is in the direction of the ar-
row on the body the valve and while installing care should
be taken to ensure no foreign matter enters into the valve.
MAINTENANCE: the only operation allowed is the sole-
noid replacement, which has to be carried out by qualified
personnel..
Pressure safety valve.
We recommend a suitable safety valve is installed.
ADJUSTABLE CONTROL THERMOSTAT 40-80 °C
(VDE (Germany) and IMQ (Italy) approved).
It controls the operation of the appliance switching the
burner on and off, according to the water temperature set.
This is a single pole liquid filled sensing bulb with operat-
ing switch contacts.
SAFETY LIMIT THERMOSTAT
(Flue gas spillage control)
It cuts off the burner operating (by cutting the current to
Gas inlet max. pressure
60 mbar
Pressure outlet range
3 - 30 mbar
Voltage rating
220/240V 50 Hz
Pressure setting
B class
Flame detection
ignition time < 10 sec
switching time < 60 sec