Filter
Top Products
—27—
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 the end of the motor sup-
port 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
mounting bolts.
11. Remove the motor.
12. To install the new motor, reverse Steps 1-11.
V. BELT TENSION ADJUSTMENT
To adjust belt tension:
1. Loosen fan motor bolts.
2. Size 155 Units:
Move motor mounting plate up or down for proper
belt tension (
1
/
2
in. deflection with one finger).
Size 180 and 240 Units:
Turn motor jacking bolt to move motor mounting
plate up or down for proper belt tension (
3
/
8
in. deflec-
tion at midspan with one finger [9 lb force]).
3. Tighten nuts.
4. Adjust bolts and nut on mounting plate to secure
motor in fixed position.
VI. CONDENSER-FAN ADJUSTMENT
A. 581A155 and 180 Units (Fig. 33)
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.
B. 581A240 Units (Fig. 34)
1. Shut off unit power supply.
2. Remove fan top-grille assembly and loosen fan hub
screws.
3. Adjust fan height on unit, using a straightedge
placed across the fan orifice.
Fig. 31 — 581A155 Evaporator-Fan Motor Adjustment
NOTE:
A 3
1
/
2
-in. bolt and threaded plate are included in the installer’s
packet. They should be added to the motor support channel 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 1
3
/
4
-in. LG.
Fig. 32 — 581A180 and 240 Evaporator-Fan Motor Section
NOTE:
Dimension is in inches.
Fig. 33 — Condenser Fan Adjustment, 581A155 and 180
NOTE:
Dimension is in inches.
Fig. 34 — Condenser Fan Adjustment, 581A240