BLOWER MOTOR MOUNTING LOCATIONS
Units are shipped from the factory less motor and drives. The blower motor and drive packages are ordered and shipped separately for field mounting. However, the units are shipped with the motor mounting assembly installed as shown in
1 for the LA300, LB360, LB480 and 2 for the LB600.
MOTOR MOUNTING
CHANNELS AND
MOUNTING PLATE
ARE ALWAYS
SHIPPED IN THIS
LOCATION.
FIGURE 1 - LA300 AN LB360/LB480 FACTORY MOTOR MOUNTING POSITION
NOTE: The 5HP motors are not inherently protected.
A lte r n a tiv e P o s itio n
1F o r P iv o t B o lts
A lte r n a te |
|
P o s itio n | 3 |
F o r P iv o t | B o lts |
LA300/LB360/LB480 MOTOR MOUNTING
The LA300, LB360 and LB480 ship from the factory with a motor mounting adapter plate for use with the 7.5 and 10 HP motors. If a 5 HP motor is used, the adapter is not necessary and should be removed and discarded.
LB600 MOTOR MOUNTING
The motor mounting plate will accommodate a 10 or 15 HP motor. One set of boltholes is provided on each end of the motor mounting plate for either motor. The motor mounting plate can be raised or lowered to any position on the adjust- ment screws to adjust the belt tension for the various pulley settings to cover the complete range of blower speeds.
The physical size of the 15 HP motor reduces the adjustment range of the motor mounting plate. To maximize this amount of adjustment, one set of boltholes is provided near the adjustment screws on each end of the motor mounting plate (refer to 4).
For some motor/blower wheel arrangements, however, the motor cannot be mounted in these bolt holes because the motor terminal box would interfere with one of the blower sec- tion panels. To make these motor/blower wheel arrange- ments possible, a second set of boltholes is provided near the pivot bolts on each end of the motor mounting plate.
1 5 H P
1 0 H P
1 5 H P
A lte r n a tiv e | P o s itio n | 1 5 | H P | |
2 | F o r P iv o t | B o lts |
|
|
A d ju s tm e n
t
S c r e w | ( 2 ) |
M o to r | M o u n tin g P la te |
( S ta n d a r d L o c a tio n
as S h ip p e d )
P iv o t B o lt
| 1 5 H P |
A d ju s t m e n t |
|
S c r e w H o le s | 1 5 H P |
( 2 ) |
|
| 1 0 H P |
FIGURE 2 - LB600 FACTORY MOTOR MOUNTING
POSITION
1 5 H P
FIGURE 3 - LB600 MOTOR MOUNT PLATE
The motors used with the evaporator blower are
NOTE: The
The 15 HP drive package requires two different lengths of belts to vary the blower wheel RPM over the complete range of rated conditions. When the motor is mounted near the adjustment screws, the two lengths of belt are interchange- able except for the higher and lower limits of blower wheel RPM. When the motor is mounted near the pivot bolts, the shorter length of belt is recommended for the higher blower wheel Rpm's and the longer length of belt is recommended for the lower blower wheel Rpm's. See Page 7 for the recom- mended blower motor locations.
Unitary Products Group | 7 |