Greenheck GB User Manual

Document 471558

Model G Direct Drive

Model GB Belt Drive

Downblast Centrifugal Roof Exhaust

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage!

Model G Direct Drive

Model G is a direct drive downblast centrifugal exhaust fan. These fans are speciﬁcally designed for roof mounted applications exhausting relatively clean air. Performance capabilities range up to 6,300 cfm (10,703

/hr) and up to 1.75 in. wg (435 Pa) of static

pressure. The maximum continuous operating temperature is 180°F (82ºC). G models are available in 20 sizes with nominal wheel diameter ranging from 8 to 22 inches (203 to 558 mm) (060 - 203 unit sizes). Each fan shall bear a permanently afﬁxed manufacturer’s engraved metal nameplate containing the model number and individual serial number. All fans are UL/cUL Listed Standard 705.

General Safety Information

Only qualiﬁed personnel should install this fan. Personnel should have a clear understanding of these instructions and should be aware of general safety precautions. Improper installation can result in electric shock, possible injury due to coming in contact with moving parts, as well as other potential hazards. Other considerations may be required if high winds or seismic activity is present. If more information is needed, contact a licensed professional engineer before moving forward.

1. Follow all local electrical and safety codes, as well as the National Electrical Code (NEC) and the National Fire Protection Agency (NFPA), where applicable. Follow the Canadian Electric Code (CEC) in Canada.

2. The rotation of the wheel is critical. It must be free to rotate without striking or rubbing any stationary objects.

3. Motor must be securely and adequately grounded.

4. Do not spin fan wheel faster than max cataloged fan RPM. Adjustments to fan speed signiﬁcantly affects motor load. If the fan RPM is changed, the motor current should be checked to make sure it is not exceeding the motor nameplate amps.

5. Do not allow the power cable to kink or come in contact with oil, grease, hot surfaces or chemicals. Replace cord immediately if damaged.

6. Verify that the power source is compatible with the equipment.

Model GB Belt Drive

GB model fans are belt drive downblast centrifugal exhaust fans. These fans are speciﬁcally designed for roof mounted applications exhausting relatively clean air. Performance capabilities range up to 44,700 cfm (75,950 m

3.25 in. wg (809 Pa) of static pressure. The maximum continuous operating temperature is 180°F (82ºC). GB models are available in 29 sizes with nominal wheel diameters ranging from 11 to 54 inches (279 to 1372 mm) (071-540 unit sizes). Each fan shall bear a permanently afﬁxed manufacturer’s nameplate containing the model number and individual serial number. All fans are UL/cUL Listed Standard 705.

7. Never open access doors to a duct while the fan is running.

DANGER

Always disconnect, lock and tag power source before installing or servicing. Failure to disconnect power source can result in fire, shock or serious injury.

CAUTION

When servicing the fan, motor may be hot enough to cause pain or injury. Allow motor to cool before servicing.

CAUTION

Precaution should be taken in explosive atmospheres.

DANGER

Pour écarter les risques d’incendie, de choc électrique ou de blessure grave, veiller à toujours débrancher, verrouiller et étiqueter la source de courant avant l’installation ou l’entretien.

ATTENTION

Lors de toute intervention sur la soufflante, le moteur peut être suffisamment chaud pour provoquer une douleur voire une blessure. Laisser le moteur refroidir avant toute maintenance.

ATTENTION

Faire preuve de précaution dans les atmosphères explosives.

/hr) and up to

Downblast Centrifugal Roof Exhaust 1

Receiving

Upon receiving the product, check to ensure all items are accounted for by referencing the delivery receipt or packing list. Inspect each crate or carton for shipping damage before accepting delivery. Alert the carrier of any damage detected. The customer will make notiﬁcation of damage (or shortage of items) on the delivery receipt and all copies of the bill of lading which is countersigned by the delivering carrier. If damaged, immediately contact your Greenheck Representative. Any physical damage to the unit after acceptance is not the responsibility of Greenheck Fan Corporation.

Unpacking

Verify that all required parts and the correct quantity of each item have been received. If any items are missing, report shortages to your local representative to arrange for obtaining missing parts. Sometimes it is not possible that all items for the unit be shipped together due to availability of transportation and truck space. Conﬁrmation of shipment(s) must be limited to only items on the bill of lading.

Figure 2

Figure 3

Screws

Hook With Safety Latch (Supplied by others)

(2) Bearing Plate Lifting Points

(4) Drive Frame Lifting Points

Screws

Handling

G Direct Drive

Lift unit on to the roof utilizing hooks under the lip of the shroud. Evenly space the hooks around the shroud using a minimum of four lifting straps. Use a spreader bar to ensure the straps do not come in contact with the unit (see Figure 1).

Figure 1

Spreader Bar

Lifting Strap

Hook

1¾ in. (44 mm)

Curb Cap

GB Belt Drive

When lifting the unit on to the roof, use either the four lifting points on the drive frame or the two lifting points on the bearing plate if present (see Figure 2 for lifting points). Access to the drive frame is accomplished by removing the screws pointed out in Figure 3. The cover can then be removed and placed on a ﬂat surface in an area protected from strong winds.

When G/GB unit is on the roof, move fan to desired location using lifting points and fasten securely through mounting holes in base. Shims may be necessary depending upon rooﬁng material thickness.

The motor amperage and voltage ratings must be checked for compatibility to supply voltage prior to ﬁnal electrical connection. For G/GB installations, the electrical supply should be routed through the conduit chase located between the curb cap and the bottom of the motor compartment. Wiring must conform to local and national codes.

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Storage

Fans are protected against damage during shipment. If the unit cannot be installed and operated immediately, precautions need to be taken to prevent deterioration of the unit during storage. The user assumes responsibility of the fan and accessories while in storage. The manufacturer will not be responsible for damage during storage. These suggestions are provided solely as a convenience to the user.

Indoor

The ideal environment for the storage of fans and accessories is indoors, above grade, in a low humidity atmosphere which is sealed to prevent the entry of blowing dust, rain or snow. Temperatures should be evenly maintained between 30° to 110°F (-1° to 43°C) (wide temperature swings may cause condensation and “sweating” of metal parts). All accessories must be stored indoors in a clean, dry atmosphere.

Remove any accumulations of dirt, water, ice or snow and wipe dry before moving to indoor storage. To avoid “sweating” of metal parts, allow cold parts to reach room temperature. To dry parts and packages, use a portable electric heater to get rid of any moisture buildup. Leave coverings loose to permit air circulation and to allow for periodic inspection.

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.

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 lintfree 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 equivalent. For hard to reach internal surfaces or for occasional use, consider using Tectyl Preventive, WD-40® or the equivalent.

506 (Ashland Inc.) or the

511M Rust

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.

Table of Contents

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.

General Safety Information ....................3

Receiving, Unpacking, Handling ................2

Storage ...................................3

Inspection and Maintenance during Storage ......3

Removing from Storage ......................3

Installation

Typical Roof Mounting Installation ............4

Typical Motor Wiring Diagram ...............4

Typical Roof Mounting Installation, Model G ....5

Typical Roof Mounting Installation, Model GB . . .5

Mounting for Severe Duty Installation ............6

Prestarting Checks ........................7-8

Operation ..................................8

Inspection .................................8

Routine Maintenance ........................9

Belt and Bearing Maintenance ...............9

Bearing Lubrication Schedule ..............10

Fan Inlet Connections .......................10

Troubleshooting ............................11

Parts List .................................12

Our Commitment ...........................12

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Installation

Typical Roof Mounting Installation

1. On the roof surface, cut an appropriate sized hole and follow manufacturer’s instructions on curb installation. Caulk and ﬂash the curb to ensure a water tight seal.

Roof Curb Installation

10. Check all fasteners for tightness.

11. Mount and wire safety disconnect switch under motor cover. Wire control switches at ground level, refer to Figure 4.

12. Replace motor cover.

Typical Wiring Diagram

MOTOR

SUPPLY VOLTAGE 115/208-230/60/1

J-BOX

L1 L2

Figure 4

Vari-Green Wiring

For Vari-Green wiring, refer to the Vari-Green Motor and Controls Installation, Operation and Maintenance Manual for complete wiring and operation instructions.

MOTOR

J-BOX

SUPPLY VOLTAGE

208-230/460/60/3

2. If unit is equipped with a backdraft damper, it should be installed now.

3. Remove motor cover. Access to the motor compartment is accomplished by removing the screws as shown in Figure 3, page 2.

4. On GB Belt Drive fans, use the lifting lugs on the drive frame or bearing plate to lift and place the unit on top of roof curb. Refer to Figure 2, page 2.

5. On G Direct Drive fans, lift and place the unit on top of roof curb using hooks under the lip of the shroud. Refer to Figure 1, page 2.

6. Secure fan to curb using a minimum of eight lag screws, metal screws or the suitable fasteners. Shims may be required depending upon curb installation and rooﬁng material.

Note: Severe duty applications may require additional fasteners. See page 6.

7. Verify power line wiring is de-energized before connecting fan motor to power source.

8. Connect power supply wiring to the motor as indicated on the motor nameplate or terminal box cover. Check the power source for compatibility with the requirements of your equipment.

9. Check fan wheel for free rotation, recenter if necessary.

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