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STANDARD BLOWER ASSEMBLY
TO INCREASE BELT TENSION
1- Loosen four bolts securing motor mounting base
to frame.
2- Turn adjusting bolt to the right, or clockwise, to
move the motor away from the blower housing.
IMPORTANT - Gap between end of frame and motor
allel along gap.
3- Tighten four bolts securing motor mounting base
to frame.
4- Relieve tension on two adjusting bolts.
PULLEY
MOTOR
SIDE VIEW
ALLEN
SCREW
BELT ADJUSTING BOLTS
- TURN CLOCKWISE
TO TIGHTEN BELT
MOTOR MOUNTING
BASE
LOOSEN BEFORE
ADJUSTING BELT TENSION
(TWO EACH SIDE)
REMOVE TWO SCREWS ON EACH
SIDE TO SLIDE FRAME PARTIALLY
OUT OF UNIT FOR SERVICE ACCESS
MOTOR
BLOWER
HOUSING
BLOWER
FRAME
GAP BETWEEN
EDGES SHOULD BE
PARALLEL ON BOTH
ENDS BEFORE
TIGHTENING MOTOR
MOUNTING BASE IN
PLACE
REMOVE TWO SCREWS
TO COMPLETELY SLIDE
BLOWER OUT OF UNIT
FIGURE 7
D-Determining Unit CFM
IMPORTANT - Units equipped with an inverter are facto-
ryset to run the blower at full speed when there is a blower
(G) demand without a heating or cooling demand. Use the
following procedure to adjust motor pulley to deliver the
full load cooling or heating CFM. See Inverter Start-Up
section to set blower CFM for all modes once the motor
pulley is set.
taken.
Note - Static pressure readings can vary if not taken
where shown.
Loosen Allen screw and turn adjustable pulley
shown in TABLE 1.
TABLE 1
Belt Minimum Turns
Open
Open
A Section 0
B Section 1* 6
O.D. or larger.
E-Blower Belt Adjustment
proper pulley alignment and belt tension are maintained.
This will allow belt to stretch and seat in the pulley grooves.
Make sure blower and motor pulleys are aligned as shown
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