Greenheck Model G - Manual (Page 4)

4 Downblast Centrifugal Roof Exhaust Fans
WARNING
Installation, troubleshooting and parts replacement is
to be performed only by qualified personnel.
WARNING
Disconnect power before installing or servicing.
CAUTION
A fan manufactured with an explosion resistant motor
does not certify the entire unit to be explosion proof.
Installation
Typical Roof Mounting Installation
1. On the roof surface, cut an appropriate sized hole
and follow manufacturer’s instructions on curb
installation. Caulk and flash the curb to ensure a
water tight seal.
2. If unit is equipped with a backdraft damper, it
should be installed now.
3. Remove motor cover. Access to the motor
compartment is accomplished by removing the
screws as shown in Figure 3.
4. Only on GB Belt Drive fans. On the drive frame use
the lifting lugs to lift and place the unit on top of
roof curb. (Refer to Figure 2 on page 2).
5. Secure fan to curb using a minimum of eight lag
screws, metal screws or the suitable fasteners.
Shims may be required depending upon curb
installation and roofing material.
Note: Severe duty applications may require
additional fasteners.
6. Verify power line wiring is de-energized before
connecting fan motor to power source.
7. Connect power supply wiring to the motor as
indicated on the motor nameplate or terminal box
cover. Check the power source for compatibility
with the requirements of your equipment.
8. Check fan wheel for free rotation, recenter if
necessary.
9. Check all fasteners for tightness.
10. Mount and wire safety disconnect switch under
motor cover. Wire control switches at ground level,
refer to Figure 4.
11. Replace motor cover.
MOTOR
L1
115/208-230/60/1 208-230/460/60/3
MOTOR
J-BOX J-BOX
SUPPLY VOLTAGE SUPPLY VOLTAGE
L2
L1
L2
L3
Typical Wiring Diagram
Vari-Green Wiring
For Vari-Green wiring, refer to the Vari-Green Motor
and Controls Installation, Operation and Maintenance
Manual, Document #473681 for complete wiring and
operation instructions.
Figure 4
®