Operation Manual

6
1.4 Technical safety equipment
1.4.1 Gas control valve
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.
1.4.2 Flue down draught safety
device
The appliance must be tted with a
ue down draught safety device. The
operation of the safeguard is based
on the principle of the Thermal Reux
Safeguard (T.R.S.).
The appliance has been tted with a
T.R.S., see Figure 2.
This T.R.S. can be recognized by
the brass colored helix coil which is
connected to the lower edge of the
draught diverter. The helix coil has been
connected to the thermostat by means
of a capillary tube. The wiring that is
connected to the thermostat must be
connected to the thermocouple.
It is the aim of the T.R.S. to prevent ue
gasses from the water heater entering
the room where the water heater has
been placed, instead of passing through
the ue to outside atmosphere. The
thermo-couple circuit is interrupted and
the gas supply is disconnected as soon
as the T.R.S. is activated by heating of
the sensor by the hot gasses.
After the cause of the reentry of ue
gasses has been traced the device can
be put back into operation again. In case
of T.R.S. the RESET button has to be
pressed rst.
If this failure occurs frequently, this
indicates that the ue suffers from down
draught conditions. We advice that
necessary remedial actions be carried
out by a competent person.
Important
The T.R.S. should never be put out
of operation. Reentry of ue gasses
to the building could be harmful and
cause poisoning or death.