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Teledyne API M701H High Performance Zero Air Generator MAINTENANCE
06712B (DCN5875) 6-5
6.7 Replacing The Hydrocarbon (HC) Scrubber
1. Turn off power and unplug the M701H power cord.
2. Disconnect the HC scrubber power at the Controller.
3. Unplug the thermocouple from the control board.
4. Remove the heat shield from the HC scrubber.
5. Disconnect the pneumatic connections at the CHARCOAL SCRUBBER INLET AND
AT THE REAR END OF THE COPPER COOLING COIL, using 1/2 and 9/16
wrenches.
CAUTION
WAIT FOR THE SCRUBBER TO COOL. THE SCRUBBER CASING
AND THE COPPER COOLING COIL WILL BE VERY HOT.
5. Remove the four screws holding the scrubber, under the chassis.
6. Lift out the scrubber.
7. Install a new Teledyne API-supplied scrubber (these are purged at the factory).
8. Screw it down.
9. Attach and tighten the pneumatic connections.
CAUTION
ENSURE THAT THE COPPER COOLING COIL IS NOT TOUCHING
ANY WIRE OR CABLE.
10. Plug the scrubber into the control board.
CAUTION
BE SURE THAT YOU USE A TELEDYNE API-SUPPLIED, PURGED
SCRUBBER. OTHERWISE, DOWNSTREAM COMPONENTS MAY BE
DAMAGED. AN UNPURGED HYDROCARBON SCRUBBER
PRODUCES A LOT OF WATER WHEN FIRST TURNED ON.
11. Plug the thermocouple into the control board.
12. Turn on the M701H.
13. Connect a millivolt meter to J12 (labeled “Thermal Couple” in Figure 5-3) on the
temperature controller.