7. Rotate motor mount assembly back past original position
tow_ud evaporator coil.
8. Remove motor mounting nuts D and E (both sides).
9. Lift motor up through top of unit.
10. Reverse above procedure to reinstall motol:
11. Check and adjust belt tension as necessary.
50HJ017 UNITS (See Fig. 45)--The 50HJ017 units use a
fan motor mounting system that features a slide-out motor
mounting plate. To replace or service file motor, slide out the
bracket.
1. Remove the evaporator-fan access panel and file heating
control access panel.
2. Remove the center post (located between the evaporator
fan and heating control access panels) and all screws se-
curing it.
3. Ix_osen nuts on the two carriage bolts in the motor mount-
ing base.
4. Using jacking bolt under motor base, raise motor to top of
slide and remove belt. Secure motor in this position by
tightening the nuts on the carriage bolts.
5. Remove the belt drive.
6. Remove jacking bolt and tapped jacking bolt plate.
7. Remove the 2 screws that secure the motor mounting
plate to the motor support channel.
8. Remove the 3 screws from file end of the motor support
channel that interfere with the motor slide path.
9. Slide out the motor and motor mounting plate.
10. Disconnect wiring connections and remove the 4 mount-
ing bolts.
11. Remove file motol:
12. To inst_dl the new motor, reveLse Steps 1-11.
MOTOR _.
MOTOR UNIT TOP PANEL
PULLEY D A
FAN
_, PULLEY
FAN SCROLL
SIDE PLATES
DRAIN
CONNECTION
Fig. 44 -- 50HJ015 Evaporator-Fan
Motor Section
FAN PULLEY_
CENTER POST
BELT
MOTOR PULLEY
SUDING MOTOR
MOTOR _ PLATE
MOTOR
PLATE
\
MOTORSUPPORT
CHANNEL JACKINGBOLT
NOTE: A 31/2-in. bolt and threaded plate are included in the
installer's packet. They should be added to the motor support chan-
nel below the motor mounting plate to aid in raising the motor. The
plate part number is 50DP503842. The adjustment bolt is 3/8- 16 x
13/4 LG.
Fig. 45 -- 50HJ017 Evaporator-Fan Motor Section
Belt Tension Adjustment -- To adjust belt tension:
1. Loosen fan motor bolts.
2. Adjust belt tension:
a. Size 015 Units: Move motor mounting plate up or
down for proper belt tension (1/2 in. deflection with
one finger).
b. Size 017 Units: Turn motor jacking bolt to move
motor mounting plate up or down for proper belt
tension (3/8 in. deflection at midspan with one fin-
ger [9 lb forcel).
3. Tighten nuts.
4. Adjust bolts and nut on mounting plate to secure motor in
fixed position.
Condenser-Fan Adjustment
50HJ015 AND 017 UNITS (Fig. 46)
1. Shut off unit power supply.
2. Remove access panel(s) closest to the fan to be adjusted.
3. Loosen fan hub setscrews.
4. Adjust fan height on shaft using a straightedge placed
across the fan orifice.
5. Tighten setscrews and replace panel(s).
6. Turn on unit power.
_ 0"62 +-8:_5
NOTE: Dimensions are in inches.
Fig. 46 -- Condenser-Fan Adjustment,
50HJ015,017
36
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