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Control Assembly Service
310554V 27
7. Return the control assembly to normal operating
condition.
MAIN Power Switch Removal
Remove the MAIN power switch as follows:
1. Shut off system power at the main circuit breaker.
2. At the control assembly, move the MAIN power
switch to the OFF position. See F
IG. 14.
3. Unlock and open the hinged cover of the control
assembly.
4. Disconnect the lead wires from the four terminals on
the MAIN power switch. Refer to F
IG. 21 and FIG. 22
for lead wire identification. If necessary, label the
wires to facilitate reassembly after the switch is
replaced.
5. Remove one flat head screw that secures the red
rotor to the switch assembly. Lift the rotor from the
switch.
6. Remove two flat head screws from the yellow
mounting plate, which fastens the switch to the
hinged cover. Remove the switch.
MAIN Power Switch
Replacement
Replace the MAIN power switch as follows:
1. Assemble the switch assembly to the yellow mount-
ing plate with two flat head screws.
2. Assemble the red rotor, which is keyed, onto the yel-
low mounting plate with one flat head screw. See
Fig. 15.
3. Turn the rotor to point down to ensure that the
switch is in the OFF position.
4. Reconnect the lead wires to the terminals on the
switch. Refer to Fig. 18 to make sure that the con-
nections are correct.
5. Close and lock the hinged cover on the control
assembly.
6. Apply system power at the main circuit breaker.
7. Move the MAIN power switch to the ON position
applying power to the control assembly.
8. Verify that the switch operates correctly.
ELECTROCUTION HAZARD
Installing and servicing this equipment requires access
to parts which could cause an electric shock or other
serious injury. Have only qualified electricians access
the control assembly
FIG. 14
0/7%2
-/4/2&!5,4 25.
-!).
25.%.!",%
#/.42/,3%,%#4
!54/-!4)#
-!.5!,
-!.5!,30%%$#/.42/,
GND2
2132
2132
2331
2132
2132
2292
2292
2132
2292
2291
2082
2122
2121
2131
2131
2291
2291
2131
2131
2131
2261
2131
2081
2132
Red rotor
Yellow
MAIN
power
switch
8039B
mounting
plate
Red rotor
MAIN power switch (back panel)