M&C CG Series, Instruction Manual

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18 MAINTENANCE
Before carrying out maintenance work, make sure that safety measures specific to the installation and
process are complied with!
W A R N I N G !
Dangerous voltage. Remove mains plug before opening the con-
verter’s housing!
The
CG... converter does not need special maintenance periods.
When replacing the catalyst cartridge, it is advisable to change the O-ring-seals provided.
The temperature controller is implemented in the front panel of the converter and can easily be dis-
mounted by pulling out the controller housing.
N O T E !
Remove mains plug before dismounting the temperature
controller!
18.1 REPLACING THE CATALYST CARTRIDGE
The catalyst cartridge can be replaced without the aid of tools. The converter does not need to be
switched off to replace the cartridge. The following steps should be followed:
•
Switch the converter's sample gas path either internally or externally to bypass;
W A R N I N G !
Hot catalyst cartridge. Touching the cartridge can lead to very se-
vere burns. Wear protective gloves and safeguard cartridge against
unauthorised access!
•
Turn the closing cap/adapter with handle

(see figures 4 and 5) counter-clockwise.
•
Pull the catalyst cartridge at the closing cap with a rotary motion out of the adapter;
The re-inserting has to be done in the opposite way.
N O T E !
In order to obtain the required gas-tightness, take care that the car-
tridge is always inserted into the adapter right up to the stop.
Moisten the outer O-rings helps placing the cartridge into the oven.
Do not use grease for O-rings because it could affect the efficiency
of the catalyst!
N O T E !
After mounting a new catalyst cartridge a start up time of approx. 2
hours is necessary to get stable CO and NO
X
values.