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
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,
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.
Typical Wiring Diagram
MOTOR | MOTOR | |
SUPPLY VOLTAGE | SUPPLY VOLTAGE | |
L1 | L1 | |
L2 | L2 | |
L3 | ||
|
Figure 4
Vari-Green Wiring
For
4 Model G/GB Centrifugal Roof Exhaust Fans
®
