Carrier 50TJ016-028 - Manual (Page 26)

26
Belt Tension Adjustment — To adjust belt tension:
1. Loosen fan motor bolts.
2. Adjust belt tension:
a. Size 016 Units: Move motor mounting plate up or
down for proper belt tension ( 1 /
2
in. deflection with
one finger).
b. Size 020-028 Units: Turn motor jacking bolt to move
motor mounting plate up or down for proper belt ten-
sion (
3 /
8
in. deflection 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.
Condenser-Fan Adjustment
50TJ016,020 UNITS (Fig. 34)
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.
50TJ024,028 UNITS (Fig. 35)
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.
4. Tighten setscrews and replace rubber hubcap to prevent
hub from rusting to motor shaft.
5. Fill hub recess with permagum if rubber hubcap is
missing.
Fig. 32 — 50TJ016 Evaporator-Fan
Motor Section
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 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
1 3 /
4
in.-LG.
Fig. 33 — 50TJ020-028 Evaporator-Fan
Motor Section
NOTE: Dimensions are in inches.
Fig. 35 — Condenser-Fan Adjustment,
50TJ024,028
NOTE: Dimensions are in inches).
Fig. 34 — Condenser-Fan Adjustment,
50TJ016,020