Unitary products group CPH 060, Installation & Operation Instructions

Page: 16 / 24

JOHNSON CONTROLS
16
FORM 145.14-IOM1 (908)
MOTOR AND PULLEY DATA
STANDARD
BLOWER MOTOR AND DRIVE DATA
Model
Drive Range
(RPM)
Motor
Adjustable
Motor Pulley
Fixed
Blower Pulley
Belts
HP
Frame
Size
RPM
Eff.
(%)
Pitch Dia.
(in)
Pitch Dia.
(in)
Designation Qty
60 946-1419 1 143 1800 82.5 1.9-2.9 3.5 4L-400 1
96 968-1340 1-1/2 145 1800 84.0 2.4-3.4 4.5 4L-440 1
120 1010-1346 2 145 1800 84.0 2.8-3.8 5.0 A43 1
OVERSIZE BLOWER MOTOR AND DRIVE DATA
Model
Drive Range
(RPM)
Motor
Adjustable
Motor Pulley
Fixed
Blower Pulley
Belts
HP
Frame
Size
RPM
Eff.
(%)
Pitch Dia.
(in)
Pitch Dia.
(in)
Designation Qty
96 1117-1489 2 145 1800 84.0 2.8-3.8 4.5 A42 1
120 1212-1548 3 145 1800 86.5 3.4-4.4 5.0 A45 1
BLOWER SPEED ADJUSTMENT
The RPM of the supply air and condenser air blowers will depend on the required CFM, and the static resistances
of both the supply/discharge and the return/intake duct systems. With this information, the RPM for the blowers can
be determined from the blower performance tables. Adjustment of blower speed is accomplished as follows:
1) Loosen belt tension by moving motor towards the blower shaft via the adjustable mounting.
2) Loosen the setscrew in the adjustable motor pulley flange. Remove external key on pulleys 4 in. dia and
larger.
3) Slower speed will increase when moveable flange is adjusted towards the fixed flange (closed). Blower speed
will decrease when the moveable flange is adjusted away from the fixed flange (opened). Pulleys are adjust -
able only in half-turn increments. Do not open pulley more than five full turns for “4L” and “A” belts, or six full
turns for “B” belts.
4) Once the pulley has been opened/closed the appropriate number of turns, replace the external key and tighten
the adjustment setscrew. Proper torque is 110-130 in.-lbs.
5) Install drive belt and adjust motor mount to tension belt.