Greenheck Fan Hooded Propeller Roof Fans User Manual

18 281/4 13 23 10 401/4 271/4 48 x 51 18 201/2 20 301/4 16 27 11 441/4 281/4 54 x 51 20 221/2 24 341/4 18 29 11 461/4 281/4 66 x 63 24 261/2 30 401/4 20 34 14 511/4 311/4 75 x 75 30 321/2 36 461/4 22 391/2 171/2 563/4 343/4 88 x 87 36 381/2 42 521/4 24 421/2 181/2 593/4 353/4 86 x 99 42 441/2 48 581/4 24 431/2 191/2 603/4 363/4 93 x 111 48 501/2 54 641/4 261/2 49 221/2 661/4 393/4 112 x 111 54 561/2 60 701/4 261/2 50 231/2 671/4 403/4 124 x 123 60 621/2 72 821/2 29 53 24 701/4 411/4 136 x 135 72 741/2

GREENHECK

P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410

PH. 715-359-6171

READ AND SAVE THESE INSTRUCTIONS

Hooded Propeller Roof Fans Belt Drive and Direct Drive

Installation, Operating and Maintenance Manual

Upon receiving the unit, check for any damage and report it immediately to the shipper. Also assure all accessory items are accounted for.

To minimize installation time, most fans are shipped completely assembled. Due to shipping size limitations, hoods for larger fans will be shipped in sections. For these fans the hood and fan components can be transported to the roof location separately. Hood assembly should begin after the fan is attached to the roof curb. Hood assembly instructions are included with the hood components.

Care must be taken not to bend or distort the fan panel or drive components during installation.

Part # 455305

Exhaust / Supply (Direct Drive Sizes 18-54 - Belt Drive Sizes 20-72)

Filtered Supply (Belt Drive Sizes Only 20 - 72)

All dimensions given in inches

A sq.

/2"

Tall Base Option

A sq.

Tall Base Option

Access to the motor compartment

On fan sizes 18 to 48:

- Remove two fasteners shown in fig. 1. Carefully swing the hood 180 degrees and let it rest on

the roof. If desired, the entire hood may be removed by removing the two additional fasteners on the opposite side of the fan.

Use caution when handling the hood in strong winds.

On fan sizes 36 to 60 access to the motor compartment can also be made by either:

- Removing birdscreen or filters and standing under the hood of large fans.

- Removing one interlocking hood end section of smaller units

Fasteners

Fig. 1

Fan

Size

Base

Sq.

BDTBTD

W x L

Damper

Size

Sq.

Roof Opg.

Sq.

Standard

Base

Tall

Base

20 301/4 16 27 11 441/4 281/4 54 x 51 20 221/2 24 341/4 18 29 11 461/4 281/4 66 x 63 24 261/2 30 401/4 20 34 14 511/4 311/4 78 x 87 30 321/2 36 461/4 22 391/2 171/2 563/4 343/4 94 x 87 36 381/2 42 521/4 24 421/2 181/2 593/4 353/4 93 x 99 42 441/2 48 581/4 24 431/2 191/2 603/4 363/4 112 x 111 48 501/2 54 641/4 261/2 49 221/2 661/4 393/4 124 x 123 54 561/2 60 701/4 261/2 50 231/2 671/4 403/4 136 x 135 60 621/2 72 821/2 29 53 24 701/4 411/4 136 x 147 72 741/2

Fan

Size

Base

Sq.

BDTBTD

W x L

Damper

Size

Sq.

Roof Opg.

Sq.

Standard

Base

Tall

Base

Belt Span

Deflection =

Belt Span

ROUTINE MAINTENANCE

Once the fan has been put into operation, a periodic maintenance program should be set up to preserve the reliability and performance of the fan. Items to be included in this program are:

• BELTS

• BEARINGS

• FASTENERS

• SET SCREWS

• LUBRICATION

• REMOVAL OF DUST/DIRT

WRONG WRONG

WRONG CORRECT

WARNING

DISCONNECT AND SECURE TO THE "OFF" POSITION ALL ELECTRICAL POWER TO THE FAN

PRIOR TO INSPECTION OR SERVICING. FAILURE TO COMPLY WITH THIS SAFETY PRECAUTION

COULD RESULT IN SERIOUS INJURY OR DEATH.

Fig. 3

Fig. 4

BELTS

Premature belt failures are frequently caused by improper belt tension (either too tight or too loose) or misaligned pulleys. The proper tension for operating a V-belt is the lowest tension at which the belts will not slip at peak load conditions. For initial tensioning, the proper belt deflection half way between pulley centers is 1/64" for each inch of belt span. For example, if the belt span is 64 inches, the belt deflection should be one inch using moderate thumb pressure at midpoint of the drive (Fig. 3).

Check belt tension two times during the first 24 hours of operation and periodically thereafter. To adjust belt tension, simply loosen four fasteners (two on each side of the motor plate) and slide the motor plate away from the fan shaft until proper belt tension is attained. On some fans, fasteners attaching the motor to the motor plate must be loosened in order to adjust the belt.

It is very important that the drive pulleys remain in proper alignment after adjustments are made. Misalignment of pulleys will result in premature belt wear, noise, vibration and power loss. See Fig. 4 .

PRESTARTING CHECKS

Check all fasteners and set screws for tightness. This is especially important for bearing set screws.

The propeller should rotate freely and not rub on the fan panel venturi. Rotation direction of the propeller should be checked by momentarily turning the unit on. Rotation should be in the same direction as the rotation decal affixed to the unit or as shown in Fig. 2. For 3-phase installations, fan rotation can be reversed by simply interchanging any two of the three electrical leads. For single phase installations follow the wiring diagram located on the motor.

FOR BELT DRIVE FANS

The adjustable motor pulley is preset at the factory for the specified fan RPM. Fan speed can be increased by closing or decreased by opening the adjustable pulley. Two or three groove variable pitch pulleys must be adjusted an equal number of turns open. Any increase in fan speed represents a substantial increase in horsepower required from the motor. Always check motor load amperage and compare to name plate rating when changing fan speed.

Fig. 2

ELECTRICAL CONNECTIONS

Before electrical connections are made, the supply voltage, phase and ampere capacity must be checked for compatibility with the fan motor. In addition, the supply wiring must be properly fused and conform to local and national electrical codes.

If the electrical supply is to be routed to the fan from the interior of the building, it should pass through the conduit hole in the fan panel. The supply wires are then connected to an optional safety disconnect switch (if supplied) or wired directly to the motor.

Airflow

Rotation

Airflow

Rotation

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