Greenheck KSF (457646) - Manual (Page 7)

7
system startup:
For proper unit function and safety, follow everything in this startup procedure in the order presented.
1. Check Voltage
Before starting the unit compare the supplied voltage with the units 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. 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. This unit is flexible for varying air volume, but the actual air volume should be known for making
final adjustments. 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 rpms or the system losses. See Troubleshooting Section in this guide.
4. Measure Motor Voltage, amperage and Fan rpM
All access doors must be installed except the 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.
Compare measured amps to the motor nameplate full load amps and correct if over amping. See the
troubleshooting section in this guide.
Blower
Housing
Ro
ta
tio
n
• Voltage meter
special tools required • Tachometer
• Amperage meter