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Maintenance Schedule Teledyne API Model M201E NH
3
Analyzer Operator Manual
36 05206H DCN5910
Table 4-2. M501 NH
3
Converter Rebuild Parts List
Part No. Description
KIT000193 RETROFIT, M501NH INNER TUBE w/SCREEN
KIT000139 REBUILD, CERAMIC BUSHINGS, M501NH
HE0000007 CERAMIC HEATER, 220W@60V M501XX
4.2 REPLACING THE CATALYTIC CARTRIDGE
1. Turn off power to the converter and allow to cool. IT IS VERY IMPORTANT
THAT THE CONVERTER BE COOL BEFORE ATTEMPTING ANY
DISASSEMBLY OR REPAIRS.
CAUTION VERY HOT
Will cause severe burns – disassembly while hot will
damage other converter components. Allow sufficient
time to cool.
2. Remove the chassis cover of the M501 NH
3
, remove the aluminum cover over
the oven, remove the two U-shaped hold down clamps.
3. Disconnect the 1) stainless steel and 2) PTFE tubes from the converter
cartridge.
4. Loosen the nut holding the cartridge assembly in the U-shaped angle bracket
mounted on the chassis floor.
5. Gently lift and tilt the converter assembly out of the U-shaped bracket and
slide the assembly out of the oven.
6. Loosen the ¼” SS tube fitting nearest the hold-down bracket; this fitting holds
the central tube in the converter. Replace the tube that is part of KIT000193.
7. Re-assemble the converter by doing the above steps in reverse order.
Figure 4-1. Catalytic Cartridge