COOK Gemini - Manual (Page 5)

5
Operation
Pre-Start Checks
1. Lock out all the primary and secondary power
sources.
2. Inspect fasteners and setscrews, particularly those
used for mounting the fan, and tighten if necessary.
3. Inspect motor wiring.
4. Ensure fan and ductwork are clean and free of
debris.
5. Test the fan to ensure the rotation of the wheel is
the same as indicated by the rotation label.
6. Restore power to unit.
Start Up
Before attaching the grille, turn the fan on and inspect
for the following:
• Direction of rotation.
• Excessive vibration.
• Unusual noise.
• Motor noise.
• Improper motor amperage or voltage.
If a problem is discovered, immediately shut off the fan.
Lock out all electrical power and check for the cause of
the trouble — refer to the ‘Troubleshooting’ section.
Inspection
Inspection of the fan should be conducted at the first
30 minute interval of satisfactory operation. During the
inspection, stop the fan and inspect as per directions
below.
• Inspect bolts, setscrews, and motor mounting bolts.
• Adjust and tighten as necessary.
Grille Installation
Attach the grille by hand-tightening the grille screws.
When the unit is furnished with a filter, place the screws
through the hole in the grille. Install the filter through the
holes provided in the filter frame. See figure 2.
Maintenance
Establish a schedule for inspecting all parts of the fan.
The frequency of inspection depends on the operating
conditions and location of the fan.
Fans exhausting contaminated air (airborne abrasives)
should be inspected every three months.
Regular inspections are recommended for fans
exhausting non-contaminated air.
It is recommended the following inspections be
conducted twice per year.
• Inspect bolts and setscrews for tightness. Tighten
as necessary.
• Inspect for cleanliness. Clean exterior surfaces
only. Removing dust and grease on motor housing
assures proper motor cooling.
Access
Gemini 100:
To inspect, clean or repair refer to the diagram below
and follow these steps:
1. Remove grille.
2. Remove blower assembly from housing:
1. Disconnect the motor from electrical supply
2. Remove the mounting bolts on the inlet plate
assembly and remove the motor/wheel assembly
3. Remove the blower wheel with an allen wrench
Electrical Supply
Junction Box & Cover Grill Mount Holes
Gemini 200 - 700 series
To inspect, clean, or repair, refer to the follow diagram
and follow these steps:
1. Remove grille.
2. Remove blower assembly from housing:
1. Disconnect the motor from electrical supply.
2. Remove mounting bolts.
3. Slide discharge flange out of spring clip and
remove motor/blower assembly from box.
3. Remove inlet ring from blower housing.
4. Remove blower wheel with an allen wrench.
Blower Mounting Brace
Wheel
Unit
Mounting
Bracket
Adjustment
Bolts
Duct Collar
Damper
Blade
Motor
Wiring
Box
Mounting Bolts
Gemini 800 - 2000 series:
To inspect, clean, or repair, refer to the diagram below
and follow these steps:
1. Remove grille.
2. Remove blower assembly from housing: