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4
TEST OF THE WATER HEATER AND SECURITY
Electronic ignition card
It controls the opening of the gas valve and the burner ignition. Since
when it receives the electrical feeding from the thermostat it initially
checks that the contacts of the pressostat are in position of operation
otherwise there is no ignition; on the contrary, subsequently, it makes
a pre ventilation cycle of the combustion chamber and the ignition
spark, if during this cycle it does not find the flame of ignition in the
pre fixed time, it is placed in block position; in it this case please wait
some second and then press the luminous reset key.
The survey of the flame happens for ionization through appropriate
probe on the burner, CE Homologated EN 298.
GAS VALVE
It is made of one multifunctional multigas valve with double safety B class
for silent operation.
The valve is equipped of pressure regulator and device for the slow ignition,
with adjustable gas capacity (factory pre setted) Homologated as for norms
.
EN 126
Fig. 03
The body is in fused aluminium it is supplied of inlet and outlet gas
connection 1/2". The unit is supplied of inlet gas filter.
The two electro valves are connected in series on the main pipe of
the gas and are feeded by co a single tripolar connector, to avoid
wrong connections. All the operations of calibration and regulation
must be executed from qualified staff.
In case of replacement of the valve be sure that the flow of the gas
is in compliance with the arrow on the body of the valve and that
during the assembly operations external substances do not enter.
AIR PRESSOSTAT
Fig. 02
Fig. 04
The function of this device is to control the combustion, interrupting
the operation of the burner in case of insufficient capacity of the
fan.
The device has 3 contacts,( two positions, one normally in open
position NA, the other normally closed NC.
MAGNESIUM ANODE
Magnesium anode is important to protect the water heater from
corrosion and galvanic currents. It is suggested to replace the anode
once every year, the anode is placed in the inspection flange, in the
frontal part of the tank.
FLANGE
Fig. 05
3
ANODE
APRIL 2009 Issue (Italy)
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