Carrier 50TFQ008-012 Installation, Start-Up And Service Instructions Manual page 26

To align the fan and motor pulleys:
1. Loosen the fan pulley setscrews.
2. Slide the fan pulley along the fan shaft.
3. Make angular alignment by loosening the motor from the
mounting plate.
To adjust belt tension:
1. Loosen the fan motor mounting nuts.
2. Sizes 008 and 009 — Slide the motor mounting plate
away from the fan scroll for proper belt tension (
deflection with 5 to 10 lb of force) and tighten the mount-
ing nuts (see Fig. 38).
Size 012 — Slide the motor mounting plate downward to
tighten belt tension ( 1 /
2
force). Secure the motor mounting plate nuts. See Fig. 39.
3. Adjust the bolt and nut on the mounting plate to secure
the motor in fixed position.
Fig. 38 — Typical Belt-Drive Motor Mounting for
Size 008 and 009
UNIT INDOOR-FAN
50TFQ MOTOR
Standard,
Alternate
008
High Static
Standard
009
High Static
Standard
012 Alternate
High Static
LEGEND
BHP — Brake Horsepower
*Extensive motor and electrical testing on these units ensures that the full horsepower range of the
motors can be utilized with confidence. Using fan motors up to the horsepower ratings shown in
this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be
affected.
1
/
-in. deflection with 5 to 10 lb of
MOTOR MOUNTING
PLATE NUTS
Table 9 — Fan Motor Performance
UNIT
VOLTAGE
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
-in.
2
Fig. 39 — Typical Belt-Drive Motor Mounting for
Fig. 40 — Indoor-Fan Pulley Adjustment
MAXIMUM ACCEPTABLE
CONTINUOUS BHP*
2.40
3.70
2.40
3.70
2.40
2.90
5.25
26
Size 012
MAXIMUM ACCEPTABLE
OPERATING WATTS
2120
3313
2120
3313
2120
2615
4400
MAXIMUM
AMP DRAW
6.0
3.0
3.0
11.7
5.5
5.5
6.0
3.0
3.0
11.7
5.5
5.5
6.0
3.0
3.0
8.6
3.9
3.9
17.3
8.5
8.5