Blower - Greenheck IGX Installation, Operation And Maintenance Manual

Start-Up Instructions:
Blower System
Pre-Start Check List
1. Disconnect and lock-out all power switches to fan.
2. Check all fasteners, set screws and locking collars
on the fan, bearings, drive, motor base and
accessories for tightness.
3. Rotate the fan wheel by hand and assure no parts
are rubbing.
1. Check Voltage
Before starting the unit compare the supplied
voltage with the unit's nameplate voltage and the
motor voltage.
2. Check Blower Rotation
If the blower is rotating in the wrong direction, the
unit will move some air but not perform properly.
To check the rotation, open the blower access
door and run the blower momentarily to determine
the rotation.
To reverse the rotation, turn the power off and use
the following
procedure:
• For single phase
units, rewire the
motor per the
instructions on the
motor.
• For three phase
units, interchange
any two power leads. This can be done at the
motor starter.
3. Check for Vibration
Check for unusual noise, vibration or overheating
of bearings. Excessive vibration maybe
experienced during initial start-up. Left
unchecked, excessive vibration can cause a
multitude of problems, including structural and/or
component failure. Many conditions can be
discovered by careful observation. If observation
cannot locate the source of vibration, a qualified
technician using vibration analysis equipment
should be consulted. If the problem is wheel
unbalance, in-place balancing can be done
providing there is access to the fan wheel.
Generally, fan vibration and noise is transmitted to
other parts of the building by the ductwork. To
eliminate this undesirable effect, the use of heavy
canvas connectors is recommended. Refer to the
"Troubleshooting" section of this manual if a
problem develops.
4. Check the V-belt drive for proper alignment and
tension.
Special Tools Required
• Voltage meter
• Tachometer
• Amperage meter
4. Air Volume Check and Measurement
Along with the building balance, the units air
volume (cfm) should be measured and compared
with its rated air volume. The most accurate way to
measure the air volume is by using the pitot traverse
method in the ductwork away from the blower.
Other methods can be used but should be proven
and accurate. To adjust the air volume, change the
fan rpm or the system losses. See Trouble
Shooting in this manual.
5. Measure Motor Voltage, Amperage and
Fan rpm
All access doors must be installed except the
Rotation
control center door. Measure and record the input
voltage and motor amperage(s).
To measure the fan rpm, the blower door will need
to be removed. Minimize measurement time
because the motor may over amp with the door
removed.

Blower

Housing
Compare measured amps to the motor nameplate
full load amps and correct if over amping. See the
Trouble Shooting section in this manual.
6. Settings for Optional Components
Optional Freeze Protection:
This shuts down the blower if the output
temperature is below the set point. A timer allows
the blower to operate during start-up. This will
reset when turned off.
Typical settings are:
Optional 2 Hour Time Delay:
This allows the unit to operate for up to 2 hours
after the control panel switch has been turned off.
The timer is adjustable.
Optional Inlet Air Sensor:
This shuts down the heater if the incoming air
temperature is higher than the set point. this
switch will automatically reset as temperature
decreases. A typical setting is 60°F.
21
Discharge temperature = 45°F
Timer = 5 minutes