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5
1.4 Technical safety equipment
Gas control block
The water heater has been tted with
a gas control block consisting of a
thermo-electrical pilot ame safeguard,
pilot ame pressure regulator, burner
pressure regulator, a control thermostat
(adjustable between 30°C and 71°C)
and a safety thermostat (82°C). This gas
control block with its simple and secure
control respectively switches the gas
supply to the main burner on or off.
This gas control block is suitable for
gasses from the rst, second and third
gas family. The maximum inlet pressure
is 50 mbar.
Thermal Reux Safeguard
The heater is tted with a ue gas
blowback safety device. The functioning
of the safety device is based upon
the principle of the Thermal Reux
Safeguard – TRS for short – shown in
Fig.2.
This TRS can be recognized by the
copper coloured spiral that is tted to the
lower edge of the draught diverter. The
spiral is connected to a thermostat by
means of a capillary tube. The wiring of
the thermostat must be connected to the
thermocouple circuit.
6
1.2 Technical safety equipment
Gas control block
The water heater has been fitted
with a gas control block consisting of a
thermo-electrical pilot flame safeguard,
pilot flame pressure regulator, burner
pressure regulator, a control thermostat
(adjustable between 30°C and 71°C)
and a safety thermostat (82°C). This
gas control block with its simple and
secure control respectively switches
the gas supply to the main burner on or
off.
This gas control block is suitable for
gasses from the first, second and third
gas family. The maximum inlet pressure
is 50 mbar.
Thermal Reflux Safeguard
The heater is fitted with a flue gas
blowback safety device. The
functioning of the safety device is
based upon the principle of the Thermal
Reflux Safeguard – TRS for short
shown in Fig.2.
This TRS can be recognized by the
copper coloured spiral that is fitted to
the lower edge of the draught diverter.
The spiral is connected to a thermostat
by means of a capillary tube. The wiring
of the thermostat must be connected to
the thermocouple circuit.
Drawing 2 - Gas control block with T.R.S.
1) T.R.S. thermostat
2) Sensor T.R.S. thermostat
3) Thermocouple with built-in
interrupter
4) Thermocouple
5) Gas control block
6) Reset button
7) Pilot burner
8) Temperature regulator knob
1) T.R.S. thermostat
2) Sensor T.R.S. thermostat
3) Thermocouple with built-in interrupter
4) Thermocouple
5) Gas control block
6) Reset button
7) Pilot burner
8) Temperature regulator knob
Drawing 2 - Gas control block with T.R.S.
5


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