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Gas valve head pressure setting low fire:
When setting the gas pressure for propane low fire (first
stage) contact SF should be open. The low fire
pressure should be adjusted to the settings shown on
the data plate and the data in the manual provided by
adjusting screw RP1
Clockwise increases the pressare. Anti clockwise to
decrease the pressare. On completion replace the
plastic cover and seal with paint.
Remove manometer ensuring that the test point screw
is gas tight.
For heaters equiped with two gas valves it will be necessary to exclude both valves .
Assembly of primary air diaphragm:
Diagram showing the fitting of a primary air
diaphragm to single burner manifold (1-2-3-5)
Diagram showing the fitting of a primary air
diaphragm for a two burner manifold type (6)
Warning the diaphragm plates should only be used when using Propane gas G31, Butane gas G30.
Gas conversion adhesive label:
Once the heater has been converted to propane ensure that the correct label is fitted to the burner overtop of the factory
fitted one covering it completely. It is recommended that the diameter of the nozzles be checked also that the pressure
corresponds to that shown on the data plate provided
Ensure that all of the additional gas components are correct for the installation (including storage tank, pipes and
pressure valves etc
Ensure that the pressure regulators are sealed after carrying out the conversion.
Gas inlet pressure must not exceed 60 mbar at the gas valve inlet.
THERMOSTAT
The heater is supplied with thermostats to control the
FAN operation and LIMIT functions.
•
FAN OPERATION (SND)
When the air near the sensor SND reaches the set
temperature (30°C) which is approximately 30 seconds
after ignition the electrical contact closes and starts the
fan.
When the air temperature close to the sensor drops
below the set temperature (30°C) and about 3-4
minutes after the burner switches off the fan will stop.
This prevents cold air flows when the burner starts and
stops.
Fan control SND TR function is connected in
parallel through the control box to the fan operation
SND
•
FAN CONTROL THERMOSTAT (SND - TR)
If the air reaches the set temperature due to a fault in
the air circulation (SND – TR) thermostat (70°C), will
shut down the burner and the yellow light on the front of
the heater will illuminate. Once the heater has
sufficiently cooled down the thermostat will reset and
the light will go out. Continual operation should be
investigated.
•
LIMIT THERMOSTAT (LM)
When due to a fault the air temperature near the sensor
reaches exceeds the set value and reaches (100°C),
the yellow indicator light will flash and the burner will
shut down The overheat limit switch will have
to be
manually reset
