Carrier 50TFQ008-012 - Manual (Page 26)

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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 ( 1 /
2
-in.
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
-in. deflection with 5 to 10 lb of
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.
Table 9 — Fan Motor Performance
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.
UNIT
50TFQ
INDOOR-FAN
MOTOR
UNIT
VOLTAGE
MAXIMUM ACCEPTABLE
CONTINUOUS BHP*
MAXIMUM ACCEPTABLE
OPERATING WATTS
MAXIMUM
AMP DRAW
008
Standard,
Alternate
208/230
2.40 2120
6.0
460 3.0
575 3.0
High Static
208/230
3.70 3313
11.7
460 5.5
575 5.5
009
Standard
208/230
2.40 2120
6.0
460 3.0
575 3.0
High Static
208/230
3.70 3313
11.7
460 5.5
575 5.5
012
Standard
208/230
2.40 2120
6.0
460 3.0
575 3.0
Alternate
208/230
2.90 2615
8.6
460 3.9
575 3.9
High Static
208/230
5.25 4400
17.3
460 8.5
575 8.5
MOTOR MOUNTING
PLATE NUTS
Fig. 38 — Typical Belt-Drive Motor Mounting for
Size 008 and 009
Fig. 39 — Typical Belt-Drive Motor Mounting for
Size 012
Fig. 40 — Indoor-Fan Pulley Adjustment