Corp. Fan User Manual

23
Start-Up - Blower
Refer to the Start-Up Checklist in the Reference
Section Before Proceeding Further!
Pre Start-Up Check
Rotate the fan wheel by hand and make sure no
parts are rubbing. Check the V-belt drive for proper
alignment and tension (a guide for proper belt tension
and alignment is provided in the Belt Maintenance
section). Check fasteners, set screws, and locking
collars on the fan, bearings, drive, motor base, and
accessories for tightness.
WARNING
Check the housing, blower, and ductwork for any
foreign objects before running the blower.
WARNING
Disconnect and lock-out all power and gas before
performing any maintenance or service to the unit.
Failure to do so could result in serious injury or
death and damage to equipment.
1. Check the Voltage
Before starting the unit, compare the supplied voltage,
hertz, and phase with the unit and motor’s nameplate
information.
Electrical Nameplate
SUP HP
MCA
MOP
VOLTS HZ PH
Unit’s Total MCA
Voltage, Hertz, Phase
DGK
5. Air Volume Measurement & Check
Measure the unit’s air volume (CFM) and compare it
with its rated air volume. If the measured air volume
is off, adjust the fan’s RPM by changing/adjusting the
drive.
2. Check the Blower Rotation
Open the blower access
door and run the blower
momentarily to determine the
rotation.
Arrows are placed on the
blower scroll to indicate the
proper direction or reference
the example shown.
NOTE
To reverse the rotation on three phase units,
disconnect and lock-out the power, then
interchange any two power leads.
NOTE
To reverse the rotation on single phase units,
disconnect and lock-out the power, then rewire the
motor per the manufacturer’s instructions.
IMPORTANT
If the blower is rotating in the wrong direction, the
unit will move some air, but will not perform as
designed. Be sure to perform a visual inspection to
guarantee the correct blower rotation.
4. Motor Check
Measure the motor’s voltage, amps and RPM.
Compare to the specifications. Motor amps can be
reduced by lowering the motor RPM or increasing
system static pressure.
3. Check for Vibration
Check for unusual noise, vibration or overheating of
the bearings. Reference the Troubleshooting section
for corrective actions.
IMPORTANT
Excessive vibration may be experienced during
the initial start-up. Left unchecked, it can cause a
multitude of problems including structural and/or
component failure.
IMPORTANT
Generally, fan vibration and noise is transmitted
to other parts of the building by the ductwork. To
minimize this undesirable effect, the use of heavy
canvas duct connectors is recommended.
IMPORTANT
Additional starters and overloads may be provided
in the make-up air control center for optional
exhaust blowers. Any additional overloads must be
checked for proper voltage, amps and RPMs.
Blower Rotation
Blower
Housing
R
o
t
a
t
i
o
n
SPECIAL TOOLS REQUIRED
• VoltageMeter(withwireprobes)
• AmperageMeter
• MicroAmpMeter
• PressureGauges–(refrigerant)
• Tachometer
• Thermometer
• Inclinemanometerorequivalent
®
Model IG / IGX Make-Up Air