8-1862-11039
20.Torque the stator mounting screws to 45--50 foot
pounds (6.2 to 6.9 Mkg).
NOTE
Mark each stator screw after it is torqued to
ensure that all the screws are torqued.
21.Look through the opening in the fan cover and en-
sure that the wires are not pinched and that they are
adequately routed.
22.Install the access cover (Item 14) using four screws
and washers (screws and washer are not included in
the kit).
23.Assemble the strain grommet (Item 15).
24.Reconnect wires, sensors and thermistor.
25.Reassemble engine into unit.
8.10 PUMPING UNIT DOWN OR REMOVING RE-
FRIGERANT CHARGE
NOTE
To avoid damage to the earth’s ozone layer, use
a refrigerant recovery system whenever remov-
ing refrigerant. When working with refrigerants
you must comply with all local government envi-
ronmental laws, U.S.A. EPA section 608.
NOTE
The unit must be in Service Mode before pump-
ing down and/or removing the refrigeration
charge. Refer to Section 5.2.3.
8.10.1 Pumping Down The Unit
In order to service the components downstream of the
king valve (and back to the compressor), the low
pressure side of the refrigeration system can be
pumped down:
a. Backseat suction and discharge service valves (turn
counterclockwise) to close off gauge connection and
attach manifold gauges to valves.
b. Open valves two turns (clockwise). Purge gauge line.
c. Frontseat the receiver manual shut--off valve (King
Valve) by turning clockwise. Start unit and run in high
speed cooling. Place SROS in the OFF position when
compressor suction pressure approaches 1 PSIG
(0.1 Bar).
d. Frontseat (close by turning clockwise) suction ser-
vice valve and the refrigerant will be trapped between
the compressor suction service valve and the manual
shut--off valve (King Valve).
e. Before opening up any part of the system, a slight
positive pressure should be indicated on the pressure
gauge.
f. When opening up the refrigerant system, certain
parts may frost. Allow the part to warm to ambient
temperature before dismantling. This avoids internal
condensation which puts moisture in the system.
g. After making necessary repairs, leak test and evacu-
ate the low side of the refrigeration system. (Refer to
Sections 8.11 and 8.12.)
h. Backseat manual shut--off valve (King Valve) and
midseat suction service valve.
i. Start the unit in cooling and check for nonconden-
sibles.
j.Check the refrigerant charge. (Refer to Table 2-1.)
NOTE
Store the refrigerant charge in an evacuated
container if the system must be opened be-
tween the compressor discharge valve and re-
ceiver. Whenever the system is opened, it must
be evacuated and dehydrated. (Refer to Section
8.12)
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