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10.18 Continued.
(b)
If resistance is zero, there is a short in the wiring inside the methane reactor.
(1)
Allow the methane reactor to cool, then disconnect and remove the
cooling coil, Figures 3 and 9 (9). Disconnect the tubing leading to the
inlet of the methane reactor. Remove the methane reactor from the
generator unit by removing the three 8-32 kep-nuts on the bottom of the
generator cabinet retaining same with the three one-inch washers for
later use.
(2)
Move the methane reactor to a suitable work area. Slide the top up and
over the inlet and outlet tube fittings as far as you can along the 3-
conductor black/red/white leads and thermocouple wire. Carefully
remove the white, high temperature insulation until the cartridge heater
and temperature control switch are exposed. Allow to cool for one hour.
(3)
Inspect all wiring and components for evidence of shorting. Repair any
shorted wire or replace methane reactor heater harness. See Section
13.0, Parts List.
(4)
If no shorts are apparent, lift the entire wiring harness from the methane
reactor block and lay it on a non-conducting surface. Take care not to
damage any of the wires.
(5)
Measure the resistance between the red lead and the black lead. It
should read zero, indicating continuity through the temperature control
switch. If not, replace the temperature control switch.
10.19
If the POWER fuse is not blown and the METHANE HEAT lamp remains on
constantly but the pyrometer indicates near room temperature, disconnect the three
electrical leads at TS-1 leading to the methane reactor.
(a)
Measure the resistance between the red lead and the white lead. If the pure
air generator operates on 120V, the resistance should be about 49-ohms if the
heater is okay. If the operating voltage is 220-240V, the resistance should be
about 194-ohms. In either case if the resistance is infinite, replace the
methane reactor heater.
(b)
Measure the resistance between the black lead and the red lead. It should
read zero indicating the temperature control switch is good. If the reading is
infinite, replace the methane reactor temperature control switch.
24
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