Teledyne 701 6.7 Replacing The HC Scrubber

Teledyne API Model 701 Zero Air Generator MAINTENANCE
01671H (DCN6051) 6-5
6.7 Replacing The HC Scrubber
1. Turn off power and unplug the M701 power cord.
2. Disconnect the HC scrubber power at the Control PCA.
3. Remove the heat shield from the HC scrubber.
4. 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. BE CAREFUL, IT STAYS HOT FOR A LONG TIME.
7. Install a new Teledyne API-supplied scrubber which has been purged.
8. Screw it down.
9. Attach and tighten the pneumatic connections. BE SURE THAT THE COPPER
COOLING COIL IS NOT TOUCHING ANY WIRE OR CABLE.
10. Check that the thermocouple is plugged into the control PCA.
.
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 scrubber into the control board.
12. Turn on the M701.
13. Connect a millivolt meter to J12 on the control PCA.
Observe that the LED starts blinking at 11.2 mV (300ºC) and that the thermocouple
voltage holds steady.
14. When all traces of water have disappeared from the M701 output, the output may be
reconnected to the analyzers.