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FIGURE 21
BLOWER ASSEMBLY (SW 120)
TO INCREASE CFM
LOOSEN ALLEN SCREW &
TURN PULLEY CLOCKWISE
TO DECREASE CFM
TURN PULLEY
COUNTERCLOCKWISE
BLOWER
MOTOR
PULLEY
BLOWER ASSEMBLY
SLIDING BASE
REMOVE SCREWS TO
SLIDE BLOWER
ASSEMBLY OUT OF UNIT
TO INCREASE BELT TENSION
1-Loosen four bolts securing motor base to mounting
frame.
2-Turn adjusting bolt to the right, or clockwise, to
move the motor outward and tighten the belt.
3-Tighten two bolts on motor pulley side.
IMPORTANT - Align top edges of blower motor base
and mounting frame base parallel before tightening
two bolts on the other side of base. Motor shaft and
blower shaft must be parallel.
4-Tighten two bolts on other side of base.
BELT TENSION
ADJUSTING BOLT - TURN
CLOCKWISE TO TIGHTEN
FIGURE 22
BLOWER ASSEMBLY (SW 240)
TO INCREASE BELT TENSION
1-Loosen four screws securing blower motor to
sliding base.
2-Turn adjusting screw to the right, or clockwise,
to move the motor upward and tighten the
belt.
3-Tighten four screws.
TO INCREASE CFM
LOOSEN ALLEN SCREW &
TURN PULLEY CLOCKWISE
TO DECREASE CFM
TURN PULLEY
COUNTERCLOCKWISE
LOOSEN SCREWS
TO ADJUST BELT
TENSION
BLOWER
MOTOR
REMOVE SCREWS TO SLIDE
BLOWER ASSEMBLY OUT OF UNIT
LOOSEN SCREWS TO
ADJUST BELT TENSION
PULLEY
ALLEN SCREW
BELT TENSION
ADJUSTING SCREWS
BLOWER
ASSEMBLY
SLIDING BASE
PULLEY
MOTOR
ALLEN
SCREW
SIDE VIEW
CAV UNITS:
ALIGN TOP EDGES
PARALLEL BEFORE
TIGHTENING MOTOR IN PLACE
