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Maintenance Schedule Teledyne API Model T201 NH
3
Analyzer Operator Manual
28 07271B DCN6646
Table 4-2. M501 NH
3
Converter Rebuild Parts List
Part No. Description
KIT000193 RETROFIT, M501 NH
3
INNER TUBE w/SCREEN
KIT000139 REBUILD, CERAMIC BUSHINGS, M501 NH
3
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