Service; Compressor Solenoid; Fan Blade Setting Dimensions; Removal Of Fan Shroud - Bard WG Series Installation Instructions Manual

SERVICE

COMPRESSOR SOLENOID

(See Sequence of Operation on page 37 for function.)
A nominal 24-volt direct current coil activates the
internal compressor solenoid. The input control
circuit voltage must be 18 to 28 volts AC. The coil
power requirement is 20 VA. The external electrical
connection is made with a molded plug assembly.
This plug contains a full wave rectifier to supply direct
current to the unloader coil.
Compressor Solenoid Test Procedure
If it is suspected that the unloader is not working, the
following methods may be used to verify operation.
1. Operate the system and measure compressor
amperage. Cycle the compressor solenoid on
and off at 10-second intervals. The compressor
amperage should go up or down at least 25%.
2. If Step 1 does not give the expected results, shut
unit off. Apply 18 to 28 volts AC to the solenoid
molded plug leads and listen for a click as the
solenoid pulls in. Remove power and listen for
another click as the solenoid returns to its original
position.
3. If clicks can't be heard, shut off power and
remove the control circuit molded plug from
the compressor and measure the solenoid coil
resistance. The resistance should be 32 to 60
ohms depending on compressor temperature.
4. Next, check the molded plug.
Voltage Check
Apply control voltage to the plug wires (18 to 28
volts AC). The measured DC voltage at the female
connectors in the plug should be around 15 to 27 VDC.
Resistance Check
Measure the resistance from the end of one molded
plug lead to either of the two female connectors in the
plug. One of the connectors should read close to zero
ohms, while the other should read infinity. Repeat
with other wire. The same female connector as before
should read zero, while the other connector again
reads infinity. Reverse polarity on the ohmmeter leads
and repeat. The female connector that read infinity
previously should now read close to zero ohms.
Replace plug if either of these test methods does not
show the desired results.
Manual 2100-587J
Page 42 of 59

FAN BLADE SETTING DIMENSIONS

Shown below are the correct fan blade setting
dimensions for proper air delivery across the outdoor
coil.
Any service work requiring removal or adjustment in the
fan and/or motor area will require that the dimensions
below be checked and blade adjusted in or out on the
motor shaft accordingly (see Table 11).
FIGURE 19
Fan Blade Setting
AIRFLOW
MIS-1724
TABLE 11
Fan Blade Dimensions
Model
WG3S2
WG4S2
WG5S2

REMOVAL OF FAN SHROUD

1. Disconnect all power to unit.
2. Remove the screws holding both grills— one on
each side of unit—and remove grills.
3. Remove screws holding fan shroud to condenser
and bottom – nine (9) screws.
4. Unwire condenser fan motor.
5. Slide complete motor, fan blade and shroud
assembly out the left side of the unit.
6. Service motor/fan as needed.
7. Reverse steps to reinstall.
"A"
Dimension A
1.75"