Greenheck Fan 470658 MSX manual Start-Up Blower

Voltage, Hertz, Phase

Start-Up - Blower

2. Check the Blower Rotation

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

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 to the right.

			n
			io
			t
		a
R	o	t

Blower

Housing

Blower Rotation

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 due so could result in serious injury or death and damage to equipment.

SPECIAL EQUIPMENT REQUIRED

Required and recommended tools. Equivalent products may be used.

Voltage &	Manufacturer:	Fluke
	Model:	177
Amperage
	Phone:	1-800-44-FLUKE
Meter
	www.fluke.com
	Manufacturer:	Fluke
Thermometer	Model:	50
	Phone:	1-800-44-FLUKE
	www.fluke.com
Micro Amp	Manufacturer:	Fluke
	Model:	116
Meter	Phone:	1-800-44-FLUKE
	www.fluke.com
U-Tube	Manufacturer:	Dwyer
	Model:	Slack Tube
Manometer	Phone:	1-219-897-8000
	www.dwyer-inst.com
	Manufacturer:	Monarch
Tachometer	Model:	Pocket Tach 100
	Phone:	1-800-999-3390
	www.monarchinstrument.com

Warning

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

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	EXH HP
MCA		MOP

Electrical Nameplate

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.

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.

16 Model MSX Make-Up Air ®