Greenheck Fan 470656 manual Start-Up Blower

Voltage, Hertz, Phase

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

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.

SPECIAL TOOLS REQUIRED

•Voltage Meter (with wire probes)

•Amperage Meter

•Micro Amp Meter

•Pressure Gauges – (refrigerant)

•Tachometer

•Thermometer

•Incline manometer or equivalent

Warning

Check the housing, blower, and ductwork for any foreign objects before running the blower.

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.

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.

1. Check the Voltage

Before starting the unit, compare the supplied voltage, hertz, and phase with the unit and motor’s nameplate information.

VOLTS HZ PH

SUP HP

MCA MOP

Unit’s Total MCA

Electrical Nameplate

2. Check the Blower Rotation

Open the blower access
door and run the blower			io
			n
			t
momentarily to determine the		a
		o
	R	t
rotation.
Arrows are placed on the
blower scroll to indicate the			Blower
proper direction or reference			Housing
the example shown.	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.

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.

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.

®

Model IG / IGX Make-Up Air 23