Mark SHOPHEATER AR 1.1 Technisches Handbuch Seite 8

– Open the gas stop cock, then carefully purge the gas pipes and check for leaks. Under no
c r i u c m s a t c n s e u e s
– Close gas stop cock.
– Switch on the electricity mains switch, place the selector in position 1 (heat) and set the room
thermostat to the maximum temperature. After a pre-purge period, the automatic ignition
control will produce an electric arc on the burner and the gas control unit safety valve will
open. Because the gas stop cock is closed, no flame will appear. The automatic ignition control
will fail after 1 attempt at ignition, lasting approximately 5 seconds. After waiting for approxi-
mately 30 seconds, the automatic control can be reset and the same cycle can be repeated.
– Open the gas stop cock, the appliance will now start up.
– Check the flame profile on the main burners.
3.3 Check that the room thermostat is functioning correctly
At a setting below the ambient temperature, the burners should switch off. At a setting higher
than the ambient temperature, the burner should ignite.
3.4 Check the nominal pressure
Check A pre-pressure and B burner pressure by using a pressure gauge connected to the gas
pressure measuring nipples [8]. The pressure is found in the type plate and in table [4] under
"D". When connecting to the burner pressure measuring nipples, the main burners must tem-
porarily be turned down (using the room thermostat). Make sure that the appliance cannot be
switched off during this check by setting the thermostat to the highest setting. The burner pres-
sure can be corrected by first removing the cover screw C and adjusting the screw on the pres-
sure regulator (anti-clockwise gives a lower pressure; clockwise a higher pressure). Replace the
cover screw!
3.5 Check the pre-pressure
The gas pre-pressure on the gas unit must be measured on an appliance that is in operation. The
pre-pressure is indicated on the appliance's type plate. To check, the volume of gas consumed [4]
can be measured via the gas meter (temporarily switch off all other appliances that consume gas).
3.6 Check that the appliance is functioning correctly
Finally, check that the operation of the appliance cannot be influenced by other appliances close to
it, localised air flows or corrosive or explosive vapours, etc.
3.7 Shutting down the heater
For short periods of time:
– Set the room thermostat to the minimum temperature.
– Do not switch off the electricity mains switch as this may damage the maximum temperature
and safety thermostat.
For longer periods of time:
– Set the room thermostat to the minimum temperature.
– After ± 5 min., the electrical power may be switched off.
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n a o p n e a l f m ! e