Mark GSX - Shutdown Procedures; Maintenance and Cleaning; Maintenance and Cleaning Guidelines

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Legend [6]
1 Measuring point for gas pre-pressure
2 Measuring point for offset
3 Offset adjustment screw
4 Throttle adjustment screw
Step 1
Set the appliance to run at full operational load by pressing and holding the reset button of the unit
for at least 5 seconds. The fault lamp in the reset button ashes at a high frequency. If the appliance
will not re up, you can try sealing the air opening in the gas mixer during ignition using your thumb
and index nger. This makes the mixture richer and easier to ignite. Check the CO
2
when the
appliance is operating at high output. If the CO
2
is too high, turn the throttle adjuster to the right
(less gas). If the CO
2
is too low, turn the screw to the left (more gas). The correct CO
2
value is
shown in table [3] (D1).
Step 2
Set the appliance to minimum load by shortly pressing the reset button of the unit. The fault lamp
in the reset button ashes at a low frequency. Check the CO
2
against the value in table [3] (D2). If
different, correct by turning the offset adjuster under the cap. To the left for lower CO
2
, to the right
for higher CO
2
.
After setting the gas control unit press the reset button again (the light goes out).
4.7 Shutting down the heater
For short periods of time:
– Set the room thermostat to the minimum temperature.
– Do not switch off the electricity supply at the main 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 minutes, the electrical power may be switched off.
5.0 Maintenance
5.1 General
The appliance must be subjected to maintenance at least once a year, more often if necessary. If
applicable, ask a qualied installer for maintenance advice. Maintenance may only be carried out by
qualied maintenance technicians. When carrying out maintenance, the appliance must have been
shut down for an extended period. Make sure that you comply with all safety rules.
5.2 Cleaning
All gas-red appliances require periodical maintenance. This maintenance work must be performed
by qualied maintenance technicians.
– Before starting maintenance work, the gas and electrical supplies must be shut off. See also
paragraph 4.7
– Check all gaskets and replace if required.
– The gas transport section is located on the side of the appliance in the electrical compartment.
The gas transport section can be removed from the appliance as a single assembly. To do so, six
M6 nuts must be removed and the electrical wiring disconnected.
EN