IDL SERIES
INLINE DUCT BLOWERS
MOTOR, PULLEYS & BELT
1.
Mount the blower pulley on the blower shaft and tighten the set screw securely on the key of the shaft.
2.
Mount the motor pulley on the motor shaft. Leave some clearance between the pulley and the motor end bell. Tighten the set screws
on the key of the motor shaft.
3.
Install the motor on the motor platform using the hardware provided.
4.
With the platform in its minimum position, install the V-belt within the pulley grooves. Position the motor on the motor platform to
ensure proper pulley alignment (see
Fig. 6
) and secure to the motor platform. (A straight edge across the face of the driven pulley
should be parallel to the belt once proper alignment has been achieved).
Note: Adjustments in the variable speed pulley require pulley
re-alignment.
5.
Pivot the motor platform to tension the V-belt and
lock in place using the 2 bolts on both sides of the blower.
(Ideal belt tension is the lowest tension at which the belt will not
slip during start up.)
As shown in illustration to right, a proper deflection of 1/64 of the
belt span is desired for belt tension.
ELECTRICAL
WARNING
EXCESSIVE BELT TENSION IS THE MOST FREQUENT CAUSE OF BEARING WEAR AND RESULTING NOISE.
PROPER BELT TENSION IS CRITICAL FOR QUIET EFFICIENT OPERATION.
Ideal belt tension is the lowest value under which belt slip will not occur at peak load conditions.
BELT ALIGNMENT
FIGURE 6
FIGURE 7
IDL-M-07_20_16
Page 3 of 5
WARNING
ENSURE POWER SUPPLY IS DISCONNECTED & LOCKED OUT PRIOR TO MAKING ELECTRICAL CONNECTIONS.
WARNING
A GROUND WIRE MUST BE CONNECTED FROM THE MOTOR HOUSING TO A SUITABLE ELECTRICAL GROUND.
X X
BEARING REPLACEMENT
Before connecting the motor to the electrical supply, check the electrical characteristics and wiring instructions as indicated on the motor
nameplate or inside the conduit box cover to ensure proper voltage and phase. Complete electrical connections as indicated.
