Bryant 549B - Manual (Page 20)

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To adjust belt tension:
1. Loosen the fan motor mounting plate nuts.
2. Size 090 and 102 — Slide the motor mounting plate
away from the fan scroll for proper belt tension ( 5 /
8
-in.
deflection with 8 to 10 lb of force) and tighten the
mounting nuts (see Fig. 31).
Size 120 — Slide the motor mounting plate down-
ward to tighten belt tension (
5 /
8
-in. deflection with 5
to 10 lb of force). Secure the motor mounting plate
nuts. See Fig. 32.
3. Adjust the bolt and nut on the mounting plate to
secure the motor in a fixed position.
Table 8 — Indoor-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
549B INDOOR-FAN
MOTOR
UNIT
VOLTAGE
MAXIMUM ACCEPTABLE
CONTINUOUS BHP*
MAXIMUM ACCEPTABLE
OPERATING WATTS
MAXIMUM
AMP DRAW
090 and
102
Standard
208/230
2.90 2615
8.6
460 3.9
High Static
208/230
4.20 3313
11.7
460 5.5
120
Standard
208/230
3.70 3313
11.7
460 5.5
High Static
208/230
5.25 4400
17.3
460 8.5
Fig. 32 — Typical Belt-Drive Motor
Mounting for Size 120
Fig. 33 — Indoor-Fan Pulley Adjustment
Fig. 31 — Typical Belt-Drive Motor
Mounting for Sizes 090 and 102
MOTOR MOUNTING
PLATE NUTS