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Doku VARIOMAX_engl_06 12
June. 2012
Goch GmbH & Co. KG
Maintenance of the actuators and flame monitoring modules as well as of other
safety devices may only be performed by the manufacturer or by his representative.
However, the appointed service technician is allowed to replace entire components
or assemblies with appropriate parts.
The operator is recommended to sign a service contract in order to make sure a
yearly maintenance of the heating installation is performed.
At the end of a service and maintenance intervention, the entire installation
must be switched on to confirm the correct operation of the heaters.
9. Changeover to different gas type
Before servicing and maintenance make sure to close the gas valve
and cut electrical power to the heater off. The heater must be de-
energized and secured against switching on!
The changeover will be performed in the following steps:
For new nozzle orifice, new air plate and new nozzle pressures see Ch. 13
Use open-end wrench size 24 and box-end wrench size 30 to unscrew nozzle
piece
(2).
Insert and fix new nozzle piece.
Unscrew the 4 hexagonal screws M8 from the nozzle housing
(4).
Change air plate
(5)
(embossing to the outside)
Fix nozzle housing again.
Turn on gas and power.
Adjust nozzle pressure accordingly.
Close test nipple.
Perform leak-test.
Change the rating plate according to the current settings.
1
3
2
4
1
5
