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4.0 Start-up/shutdown
4.1 General
Before being packed, each appliance is fully tested for safety and correct operation. Among other
checks, the gas pressure and CO2 are set. You must however always check the gas pre-pressure.
Never turn the adjusment screws without good cause. Do not forget to instruct the user on the
proper use and operation of the appliance and peripherals.
4.2 Checks
– Switch off the electricity supply at the main switch.
– Set the room thermostat to the minimum temperature.
– Open the gas stop cock, then carefully purge the gas pipes of air and check for leaks. Under no
circumstances use a naked ame! [27]
– Close the gas stop cock.
– In the case of the GSX, check whether the vanes in the air discharge port are set to the open
position (open to a min. of 45º).
– Switch on the electrical supply at the main switch and set the room thermostat to maximum
temperature. After the purge time has elapsed, the automatic ignition control will generate an
electric spark and the safety valve on the gas control unit will open. Because the gas stop clock is
closed, no ame will appear. The automatic ignition control will lock out after 4 attempts at
ignition, each lasting about 5 seconds. After waiting for approximately 30 seconds, the automatic
controller can be reset and the same cycle can be repeated.
– Open the gas stop cock, the appliance will now start up.
– Check the ame pattern at the main burner (clearly dened inner core, even combustion).
– In the case of appliances with an external fan, check that the maximum temperature increase of
30K is not exceeded.
4.3 Checkthattheroomthermostatisfunctioningcorrectly
If the setting is lower than the ambient temperature, the burner will extinguish. At a setting higher
than the ambient temperature, the burner should ignite.
4.4 Check the pre-pressure
The gas pre-pressure must be measured at the gas unit when the appliance is in operation. The pre-
pressure is indicated on the appliance’s type plate. To check, the volume of gas consumed [3] can be
measured via the gas meter (temporarily switch off all other appliances that consume gas).
4.5 Check appliance operation.
Finally, check that the operation of the appliance cannot be inuenced by other appliances close to
it, localised air ows or corrosive or explosive vapours, etc.
4.6 Set the gas control unit [6]
Before being packed, each appliance is fully tested for safety and correct operation. The correct
combustion values are set during this procedure. If checks indicate that the CO2 value is different
from that in table [3], adjustments may be made (difference of more than 0.2%). Never adjust set
screws without the correct measuring equipment.
