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.

Voltage, Hertz, Phase

VOLTS

 

 

HZ

 

PH

 

SUP HP

 

 

EXH HP

 

 

 

 

 

 

MCA

 

 

 

MOP

 

 

 

 

 

 

 

Electrical Nameplate

8Model VSU Make-Up Air

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.

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Greenheck Fan VSU manual Start-Up Blower

VSU specifications

Greenheck Fan VSU, or Variable Speed Unit ventilators, represent a significant advancement in the field of HVAC technology. Designed to enhance air quality and energy efficiency, these units are particularly suited for commercial applications such as schools, offices, and industrial facilities. They provide a reliable solution for both heating and cooling, ensuring optimal comfort and productivity in diverse environments.

One of the hallmark features of the VSU is its variable speed motor. This innovation allows the fan speed to adjust according to the specific demands of the space, leading to substantial energy savings compared to traditional fixed-speed units. By operating at reduced speeds during lower load conditions, the VSU minimizes energy consumption while maintaining comfortable indoor conditions. This adaptive capability not only lowers utility bills but also contributes to a reduced environmental footprint.

In addition to energy efficiency, the VSU is equipped with advanced controls that provide precise temperature management and air distribution. These controls can be integrated into existing building management systems, giving facility managers the ability to monitor and fine-tune operations remotely. The ability to set specific schedules and program temperature settings enhances overall building performance and ensures that spaces are only conditioned when necessary.

The VSU is designed with a robust and durable construction, featuring corrosion-resistant materials that prolong the unit's lifespan. This reliability is further enhanced by its easy accessibility for maintenance, making it a cost-effective solution for long-term use. Users can expect a quiet operation due to the fan’s advanced design, which significantly reduces noise levels compared to traditional models.

Furthermore, the VSU supports a variety of custom configurations, allowing it to meet the specific needs of different applications. Whether it's integrating with other HVAC components or adapting to varied ceiling heights, the flexibility of the Greenheck Fan VSU makes it a versatile choice for engineers and building owners alike.

In conclusion, the Greenheck Fan VSU stands out for its combination of energy efficiency, advanced control options, durability, and adaptability. As the demand for sustainable and effective HVAC solutions continues to grow, the VSU positions itself as a top choice for those seeking to enhance indoor air quality while minimizing operational costs.