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| BLOWER INSTALLATION, ADJUSTMENT and SERVICE GUIDE for BELT DRIVE BLOWERS | ||||||||||||||||||||
 Belt Drive Blowers A GOOD INSTALLATION PAYS OFF ... There's good money to be made in the new or replacement blower business. But, you can eat up your profits in expensive service call-backs if you fail to install and adjust the blower correctly. Follow these simple steps for trouble-free installation.
1. BEGIN BY MOUNTING BLOWER FEET.... Feet can be mounted in any of four standard positions by using the slotted holes and screw holes in the housing sides. Any variation in position may be easily obtained by
2. ATTACH MOTOR MOUNTING BRACKET.... to the blower housing using the sheet metal screws, provided. Attach the motor on the mount, but don't tighten the bolts until after installing
3. MOUNT VARIABLE-PITCH MOTOR PULLEY.... on the motor shaft with its movable face towards the end of the shaft, away from the motor. On the side of |
4. MOUNT BLOWER PULLEY ... on the blower shaft by tightening its setscrew
5. WIPE OFF PULLEYS AND BELT ... with a clean rag to get rid of oil and dirt. Dirt
6. INSTALL V-BELT ... in the pulley grooves by loosening the belt take
7. ALIGN BOTH PULLEY AND SHAFTS ... by moving the motor on its motor mount.
8. A PULLEY ALIGNMENT SHORT-CUT
9. CHECK BELT TENSION... before proceeding further. Remember that a V Belt-Tension Adjustment Tip: Using the belt take-up or motor-adjusting screw, tighten the WARNING: Excessive belt tension is the most frequent cause of bearing wear and noise.
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10. RUN THE MOTOR ... to determine the direction of rotation. If necessary to reverse the rotation, follow the instructions on the motor terminal block for reversing the lead
11. INSTALL THE BLOWER ... in the furnace or air conditioning unit following the checklist below:
12. ADJUST BLOWER SPEED ... The blower speed can be adjusted to increase or decrease its output of air in a furnace or air conditioning unit by following the steps on page 2.
PREVENTATIVE MAINTENANCE FOR BELT DRIVE BLOWERS Show the homeowner how they can perform basic service on the blower:
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trimming off the tabs and drilling new screw holes. The hardware bag contains rubber Vibro-Pads. Slip one into each of the corner holes of the feet.
and aligning the belt and pulleys. Bolt the tension-adjusting bracket to the motor, start the adjusting screw, add the locknut, and place the rubber bumper on the end.
the pulley nearest the motor, tighten the setscrew on the "flat" or "key" of the motor shaft. Leave some clearance between the pulley and the end bell of the motor.
securely on the "flat" of the shaft. Be sure the blower pulley is perpendicular to the shaft; it will be used later as a guide for aligning the drive.
and grease are tough abrasives that cause the belt to wear out faster, throwing it out of balance and shortening its life.
-up or the adjusting screw on the motor. Do not "roll" or "snap" the belt on the pulleys; this causes too much strain on the pulleys. Be sure the belt doesn't "bottom" in the pulley grooves.
Hold a straight edge flush against the blower pulley, then move the motor until the belt is parallel to the straight edge.
... Sight down the top of the belt from slightly above it. If the belt is straight where it leaves the pulley and does not bend, the alignment is fairly accurate.
-belt "rides" the inside of the pulley faces. Since the sides of the belt wedge in the pulleys, the V-belt does not have to be tight. It should be as loose as possible without slipping in the pulley grooves.
belt until the slack side can be depressed about 3/4" for each foot of span between pulleys.
wires. The directions are usually found under the cover where the lead wires enter the motor. Run the blower for about five minutes, or until the belt tends to "seat" itself in the pulley groove.
