Carrier 50HJ009 - Typical Belt-Drive Motor Mounting; Evaporator-Fan Pulley Adjustment; Humidi-Mizer Adaptive Dehumidification System Static Pressure Drop

26
To align fan and motor pulleys:
1. Loosen fan pulley setscrews.
2. Slide fan pulley along fan shaft.
3. Make angular alignment by loosening motor from
mounting plate.
To adjust belt tension:
1. Loosen fan motor mounting nuts.
2. Sizes 008, 009 — Slide motor mounting plate away from
fan scroll for proper belt tension (
1
/
2
-in. deflection with 8 to
10 lb of force) and tighten mounting nuts (see Fig. 44).
Sizes 012, 014 — Slide motor mounting plate downward
to tighten belt tension. Secure motor mounting plate nuts.
See Fig. 45. Use
1
/
2
-in. deflection with 10 lb of force.
3. Adjust bolt and nut on mounting plate to secure motor in
fixed position.
6000
5000
4000
3000
2000
1000
0
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
DELTA P IN. WG
7.5 ton
8.5, 10 & 12.5 ton
CFM
Fig. 43 — Humidi-MiZer™ Adaptive Dehumidification System Static Pressure Drop (in. wg)
MOTOR MOUNTING
PLATE NUTS
Fig. 44 — Typical Belt-Drive Motor Mounting for
Sizes 008, 009
Fig. 46 — Evaporator-Fan Pulley Adjustment
Fig. 45 — Typical Belt-Drive Motor Mounting for
Sizes 012, 014