Greenheck Fan NYD, NYB Inspection and Maintenance During Storage, Removing From Storage, Outdoor

The unit should be stored at least 3½ inches

(89 mm) off the floor on wooden blocks covered with moisture proof paper or polyethylene sheathing. Aisles between parts and along all walls should

be provided to permit air circulation and space for inspection.

Outdoor

Fans designed for outdoor applications may be stored outdoors, if absolutely necessary. Roads or aisles for portable cranes and hauling equipment are needed.

The fan should be placed on a level surface to prevent water from leaking into the fan. The fan should be elevated on an adequate number of wooden blocks so that it is above water and snow levels and has enough blocking to prevent it from settling into soft ground. Locate parts far enough apart to permit air circulation, sunlight and space for periodic inspection. To minimize water accumulation, place all fan parts on blocking supports so that rain water will run off.

Do not cover parts with plastic film or tarps as these cause condensation of moisture from the air passing through heating and cooling cycles.

Fan wheels should be blocked to prevent spinning caused by strong winds.

Inspection and Maintenance During Storage

While in storage, inspect fans once per month. Keep a record of inspection and maintenance performed.

If moisture or dirt accumulations are found on parts, the source should be located and eliminated. At each inspection, rotate the wheel by hand ten to fifteen revolutions to distribute lubricant on motor. If paint deterioration begins, consideration should be given to touch-up or repainting. Fans with special coatings may require special techniques for touch- up or repair.

Machined parts coated with rust preventive should be restored to good condition promptly if signs of rust occur. Immediately remove the original rust preventive coating with petroleum solvent and clean with lint-free cloths. Polish any remaining rust from surface with crocus cloth or fine emery paper and oil. Do not destroy the continuity of the surfaces. Thoroughly wipe clean with Tectyl® 506 (Ashland Inc.) or the equivalent. For hard to reach internal surfaces or for occasional use, consider using Tectyl® 511M Rust Preventive, WD-40®or the equivalent.

Removing From Storage

As fans are removed from storage to be installed in their final location, they should be protected and maintained in a similar fashion until the fan equipment goes into operation.

Pre-Starting Checks

1.Check all fasteners and setscrews for tightness. The wheel should rotate freely and be aligned as shown in figure 2.

Wheel Overlap Dimensions

Model	G - Overlap in. (mm)	H - Gap in. (mm)
NYD 075-090	-	3/32 (2)
NYD 075-140	-	1/4 (6)
NYB 100-140	1/4 (6)	-
NYB 180-240	3/8 (10)	-
	G	H
Figure 2

2.Wheel position is preset and the unit is test run at the factory. Movement may occur during shipment and realignment may be necessary.

3.Centering can be accomplished by loosening the bolts holding the drive frame to the shock mounts and repositioning the drive frame.

4.Wheel and inlet cone overlap can be adjusted by loosening the setscrews in the wheel and moving the wheel to the desired position.

5.Check wheel rotation by momentarily energizing the unit. Rotation should be clockwise as shown in figure 3 and correspond to the rotation decal on the unit. Rotation is determined when the unit is viewed from the motor or shaft pulley side. If wheel rotation is incorrect reverse two of the wiring leads or check motor wiring for single-phase.

Wheel Rotation (view from top of fan)
Clockwise	Counterclockwise
Airflow	Airflow
NYD 60-130	NYD 140
All NYB Models
Figure 3

WARNING

Correct direction of wheel rotation is critical. Reversed rotation will result in poor air performance, motor overloading and possible burnout.

Models NYD & NYB • Tamper-Resistant Centrifugal Roof Exhaust Fans

®

3