Belt Tensioner Add-On Kit
for 48" Advantage Fans
built Sept. 16, 2003 and after
FH2416
Aerotech, A Munters Company
4215 Legion Dr. Mason, MI 48854-1036 USA
(517) 676-7070 Fax (517) 676-7078
FORM: QM1211
January 2004
Page 1 of 2
INSTALLATION INSTRUCTIONS
1) Remove the shutter or inlet guard from the fan. See Figure 1.
2) Remove the existing drive belt. See Figure 2.
3) Install the belt tensioner finger tight, in the left hole of the motor base as viewed from
the inlet (shutter side) of the fan. See Figure 3.
4) Install new belt on pulleys. Start by placing belt over motor pulley, then over idler
pulley and rotate around bottom of propeller pulley. See Figure 3 & 4.
AT481Z1 without
Tensioner
AT481Z1 with
Tensioner
Belt Tensioner Kit (FH2416) includes:
1 - Tensioner Assembly
1-
3
/8" x 1.75 Bolt, SS
1-
3
/8" Flat Washer, SS
Figure 2
Existing
Drive Belt
Motor Base
Motor
Figure 3
3
/8" x 1.75
Bolt
3
/8" Flat
Washer
Tensioner
Left Hole
Idler
Propeller
Pulley
Motor
Pulley
Figure 1
Inlet (shutter side)
WARNING
!
High Voltage,
disconnect power
before servicing.
Belt required, sold separately
!
Aerotech, A Munters Company
4215 Legion Dr. Mason, MI 48854-1036 USA
(517) 676-7070 Fax (517) 676-7078
FORM: QM1211
January 2004
Page 2 of 2
Drive Alignment
1) Use a straight edge to check the alignment of the pulleys. See Figure 5.
2) Check alignment of belt on idler pulley, it should be centered on the idler pulley. The belt tensioner’s idler
pulley is fixed in position, therefore, alignment must be obtained by adjusting the motor and propeller pulleys.
3) If an adjustment is needed, remove the belt, then loosen the set screws in the pulleys and move them as
necessary to achieve proper alignment.
4) Remember to tighten the pulley set screws after making an adjustment.
5) Drive alignment is very important for long belt life and proper operation.
Installation now complete, reconnect power to the motor and install the shutter or inlet guard.
Figure 5
Idler Pulley
Propeller
Pulley
Straight Edge
Belt
5) To torque the belt tensioner to the proper setting place a
15
/16" wrench onto the
15
/16" hex on the tensioner.
See Figure 4. Turn wrench counterclockwise until the single mark on one half of the belt tensioner is aligned
half way between marks 2 and 3 on the opposite half of the tensioner. See Figure 4. Hold tensioner at this
setting and tighten the
3
/8" x 1
3
/4" bolt fastening the tensioner to the motor base. Fasten tensioner
3
/8" bolt to
40ft. lbs of torque. See Figure 4.
Mark on Base
Second Mark on
Tensioner Arm
Motor
Pulley
Figure 4
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1
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2
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