Component Replacement - AADCO 737 Series Operating Instructions Manual

Pure air generators
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11.0

COMPONENT REPLACEMENT

11.1
THE PURIFICATION REACTOR.
11.2
Should it become necessary to replace the purification reactor: (a) order
replacement unit from factory, being certain to specify type of purification reactor
("A", "B", "C", or "D") as indicated on the serial number tag, Figure 2 (7), on the rear
of the unit; (b) all flows for the replacement unit are factory set and should not be
altered; and (c) all fittings and electrical connections are supplied with the unit to
permit rapid substitution.
11.3
Once all plumbing and electrical connections have been disconnected so that the
purification reactor is ready for removal from the pure air generator: (a) place the
pure air generator between two level surfaces so that the bottom of the chassis is
exposed; and (b) remove the two 10-32 screws and the one-inch washers holding
the reactor in place. The reactor is now ready for removal and replacement.
11.4
Install the replacement purification reactor and reverse the procedure in Section
11.3. Once operation of the pure air generator has begun, leak check all fittings
with soap solution and tighten as required.
11.5
THE METHANE REACTOR.
11.6
To replace the methane reactor: (a) disconnect the three methane reactor leads
at TS-1 and the two-conductor thermocouple disconnect leading from the
pyrometer to the methane reactor, (b) disconnect and remove the cooling coil, (c)
disconnect the
methane reactor, (d) remove the three 8-32 kep-nuts and the one-inch washers
from the underside of the generator cabinet which hold the methane reactor in
place, and (e) remove the methane reactor from the cabinet.
11.7
Install the replacement methane reactor and reverse the procedure in Section 11.6.
11.8
THE PUMP SWITCH.
11.9
To replace the PUMP switch: (a) disconnect the blue, white and black leads for this
switch at TS-1; (b) use a 9/16 inch wrench to loosen the nut behind the front panel
which holds the switch in place; and (c) unscrew the black bezel which encircles the
red lens cap while holding the switch inside the unit with the other hand; and (d)
install the new switch after transferring the nut and washer from the defective
switch, reversing procedures (a) through (c).
11.10
THE POWER SWITCH.
11.11
To replace the power switch: (a) disconnect the blue and white leads for this switch
inch tubing from the outlet of the rotameter to the inlet of the
1/4
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