Greenheck Vari-Green 309025, Installation, Operation And Maintenance Manual

Page: 37 / 92

Clockwise
Airflow
All
ew
and
eWB
models
have clockwise rotation
when viewed from top
of
tan
Figure 7
Pre-Starting Checks
1. Check all fasteners and setscrews for tightness.
The wheel should rotate freely and be aligned as
shown in figure 7.
2. Wheel position is preset and the unit is test run at
the factory. Movement may occur during shipment
and realignment may be necessary.
Wheel Overlap and Gap Dimensions
3. Only CW unit - Centering height alignment can
be accomplished by loosening the set screws in
the wheel and moving the wheel to the desired
position.
4. Only
cwe
unit - Centering can be accomplished by
loosening the bolts holding the drive frame to the
shock mounts and repositioning
the drive frame.
5. Only
cwe
unit - Wheel and inlet cone overlap
can be adjusted by loosening the setscrews in
the wheel and moving the wheel to the desired
position.
6. Only
cwe
unit - Fan RPM should be checked and
verified with a tachometer.
7. Check wheel rotation (viewing from the shaft
side) by momentarily energizing the unit. Rotation
should be clockwise and correspond to the rotation
decal on the unit, see figure 8. If wheel rotation is
incorrect reverse two of the wiring leads or check
motor wiring for single phase.
Wheel Rotation
FigureS
cW/cwe
Models 098 - 300
m
CW Models 060-095
Ii
--0
3. Once the mounting plate has been attached to the
wall, the unit can be installed. The unit should be
aligned with the breather tube (7) pointing down.
The electrical chase should be guided through the
hole in the motor compartment.
The horizontal
support channels (8) should slide over the mounting
angle clips (10) on the mounting
plate until the holes
in the windband and clips are aligned. Replace
fasteners (9) and tighten. Wiring now can be done.
Consult local code authorities
for your specific
requirements.
4. During shipping, wheel position may shift.
Alignment should be as shown above (centered in
the inlet) and can be accomplished
by loosening the
fasteners (11) located in the motor compartment.
For belt drive units, additional
vertical alignment can
be accomplished by loosening the four fasteners on
the drive frame support angles, and the 2 fasteners
that hold the L-brackets
to the support angles on
top (13). Also, horizontal alignment can be made by
loosening the bearings from the bearing plate.
Removal of the entire power pack (motor, drives
and wheel) for maintenance
or cleaning can be
accomplished by removing the breather tube (12) and
fasteners (11).