Greenheck CUE, CUBE User Manual

Document 471560

Upblast Centrifugal Roof Exhaust Fans

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 CUE Direct Drive

Model CUE is a direct drive upblast centrifugal exhaust fan. These fans are speciﬁcally designed for roof mounted application. Performance capabilities range up to 6,400 cfm (10,874 m 3 in. wg (747 Pa) of static pressure. The maximum continuous operating temperature for fan sizes 098-200 is 400°F (204°C) and for fan sizes 060095 is 160°F (71°C). CUE fans are available in fourteen sizes with nominal wheel diameter ranging from 9 to 20 inches (229to 508 mm) (060 - 200 unit sizes). Each fan shall bear a permanently afﬁxed manufacturers engraved metal nameplate containing the model number and individual serial number.

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 are present. If more information is needed, contact a licensed professional engineer before moving forward.

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

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

Precaution should be taken in explosive atmospheres.

/hr) and up to

DANGER

CAUTION

Model CUBE Belt Drive

Model CUBE is a belt drive upblast centrifugal exhaust fan. These fans are speciﬁcally designed for roof mounted applications. Performance capabilities range up to 30,000 cfm (50,970 m up to 5.0 in. wg (1240 Pa) of static pressure. The maximum continuous operating temperature is 400°F (204°C). CUBE fans are available in

fourteen sizes with nominal wheel diameter ranging from 9 to 48 inches (229 to 1219 mm) (098 - 480 unit sizes). Each fan shall bear a permanently afﬁxed manufacturers engraved metal nameplate containing the model number and individual serial number.

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 Electrical 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.

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

is running.

/hr) and

Upblast Centrifugal Roof Exhaust Fans

Receiving

Upon receiving the product, check the bill of lading to ensure all items were received. Inspect each crate for shipping damage before accepting delivery. All damage should be noted on all the copies of the bill of lading and a claim should be ﬁled with the carrier. Any physical damage to the unit after acceptance is not the responsibility of Manufacturer.

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.

Fig. 2

Hook With Safety Latch (Supplied by others)

(2) Bearing Plate Lifting Points

(4) Drive Frame Lifting Points

Handling

CUE Direct Drive

Lift unit on to the roof utilizing hooks under the horizontal supports. Evenly space the hooks 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).

Fig. 1

Spreader Bar

Lifting Strap

Hook

CAUTION

Do not lift by the fan hood. Avoid lifting fans in a way that will bend or distort fan parts. Never pass slings or timbers through the venturi of fan. Fans with special coatings or paints must be protected in handling to prevent damage.

Fig. 3

Screw

CUBE Belt Drive

When lifting the unit onto 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 CUE/CUBE 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 CUE/CUBE installations, the electrical supply should be routed through the conduit chase located between the curb cap and the bottom of the motor compartment or through the motor cooling tube. Wiring must conform to local and national codes.

Upblast Centrifugal Roof Exhaust Fans

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 in. (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.

WARNING

Installation, troubleshooting and parts replacement is to be performed only by qualified personnel. Consult and follow all applicable national, state and local codes. They will supercede this document.

WARNING

Disconnect power before installing or servicing.

Upblast Centrifugal Roof Exhaust Fans

Installation

Caulk

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

b to

ter

tight seal.

Roof Curb Installation

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.

4. For CUBE Belt Drive fans only. On the drive frame use the lifting lugs to lift and place the unit on top of roof curb. (Refer to ﬁgure 2 on page 2).

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

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

7. 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.

8. Check fan wheel for free rotation, re-center if necessary.

9. Check all fasteners for tightness.

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

Typical Wiring Diagram

Fig. 4

MOTOR

J-BOX

SUPPLY VOLTAGE 115/208-230/60/1

L1 L2

MOTOR

J-BOX

SUPPLY VOLTAGE

208-230/460/60/3

11. Replace motor cover.

12. For restaurant and UL Listed for smoke evacuation applications, the electrical supply must enter the motor compartment through the breather tube. For other non-ﬂammable applications the electrical supply can be routed through the conduit chase between the curb cap and the bottom of the motor compartment.

IMPORTANT

ELECTRICAL - If fan motor is NOT thermally protected, remote overload protection must be installed having adequate rating as to voltage, frequency, horsepower, and full load current per phase. Where connected to a circuit protected by fuses, use time delay fuses. For supply connection use wires rated for at least 194˚F (90˚C).

Power Ventilator 565L

INSTALLATION - When connecting electrical power to this fan, do not restrict motor movement for possible future belt or wheel adjustment.

CAUTION - Mount with the lowest moving part at least 8ft (2.5m) above ﬂoor or grade level. Not required on roof mounted ventilators or duct mounted ventilators provided with belt guards.

CUE - Direct Drive

Model

CUE 060, 065, 070, 075

CUE 080, 085, 090

CUE 095

CUE 098, 099, 101, 121, 131

CUE 141, 161

CUE 180-200

Curb

17 (432) 8 (203)

19 (483) 10 (254)

19 (483) 12 (305)

22 (559) 16 (406)

30 (762) 18 (457)

Cap

Damper

Roof

Opening

101⁄2

(267)

121⁄2

(318)

121⁄2

(318)

141⁄2

(368)

181⁄2

(470)

201⁄2

(521)

*Approx.

Weight

26 (12)

33 (15)

36 (16)

67 (30)

85 (39)

142 (64)

CUBE - Belt Drive

Model

CUBE 098, 099, 101, 101HP, 121, 131 CUBE 141, 141HP, 161, 161HP, 161XP

CUBE 180

CUBE 180HP

CUBE 200

CUBE 200HP

CUBE 220, 220HP

CUBE 240, 240HP, 240XP CUBE 300, 300HP, 300XP CUBE 360, 360HP, 360XP

CUBE 420

CUBE 480

• All dimensions are in inches (millimeters). *Approximate weight shown in lbs. (kg.) is the

largest cataloged Open Drip Proof motor.

• The roof curb should be 1½ in. (38 mm) less than the curb cap to allow for roofing and

flashing.

Curb

Cap

(483)

(559)

(762)

(864)

(1016)

(1168)

(1321)

(1473)

Shaft

Bearings

⁄2 (19) 12 (305)

⁄2 (19) 16 (406)

⁄4 (19) 18 (457)

1 (25) 18 (457)

⁄4 (19) 18 (457)

1 (25) 18 (457)

1 (25) 24 (610)

1 (25) 30 (762)

11⁄4 (32) 36 (914)

⁄4 (32)

11⁄2 (38)

Damper

(1067)

(1219)

Roof

Opening

141⁄2

(368)

181⁄2

(470)

⁄2

(521)

201⁄2

(521)

201⁄2

(521)

201⁄2

(521)

261⁄2

(673)

261⁄2

(673)

321⁄2

(826)

381⁄2

(978)

⁄2

(1130)

501⁄2

(1283)

*Approx.

Weight

66 (30)

87 (39)

126 (57)

142 (64)

174 (79)

175 (79)

313

(142)

440

(200)

578

(262)

675

(306)

Upblast Centrifugal Roof Exhaust Fans

General Ventilation Installation

Fig. 5 - Typical Roof Mounting Installation

Screw

Conduit Chase

3/4 in.

(19 mm)

8 or 12 in. min.

(203 or 305 mm)

Roof Deck

(32 mm)

Wiring by

Others

Damper

/4 in.

Recommended

Duct and

Damper Size

Recommended

Roof Opening

Screw

Factory Wired Motor to Disconnect

11/4 in.

(32 mm)

Kitchen Roof Mounting Installation

1. The size of the duct must be equal or larger than inlet opening.

2. Secure the fan to curb at all four corners using a minimum eight anchor bolts, lag screws or other suitable fasteners.

3. Area codes may require a continuous weld between duct and inlet.

4. To comply with NFPA 96 the fan discharge has to be a minimum 40 in. (1016 mm) above the roof surface and a minimum of 10 ft. (3048 mm) from any building air intake.

5. Ductwork to an upblast discharge exhaust fan is constructed of carbon steel not less than 16 MSG (1.6 mm) and extend a minimum of 18 in. (457 mm) above the roof surface.

6. Ensure that a minimum of 500 ft/min of air velocity through the fan is maintained per NFPA 96, clause 8.2.1.1, 2008 edition and UL 762, Issue #5, December 19, 2003, clause 6.2.

7. The following accessories may be required by NFPA-96 depending upon installation; Grease Trap, Hinge Kit or Hinged Base, Clean-out Port, and Vented Curb.

WARNING

Minimum duct velocities must be maintained in kitchen exhaust applications. If a speed controller is used, ensure compliance with all applicable codes.

Commercial Kitchen Installation

Fig. 6 - Typical Roof Mounting Installation

Screw

Minimum 40 in.

(1016 mm)

Discharge Height

(per NFPA)

Optional Grease Trap

8 in. min. (203 mm)

Roof Deck

Power Ventilator Restaurant Exhaust Appliances 13G3 Maximum Operating Temperature 400˚F

INSTALLATION - When connecting electrical power to this fan, do not restrict motor movement for possible future belt or wheel adjustment.

Must be installed in accordance with the requirements of MFPA 96 or must have minimum clearances of zero inches to non-combustibles, 3 inches to limited combustibles, 18 inches to combustibles.

CAUTION - Mount with the lowest moving part at least 8 ft (2.5m) above ﬂoor or grade level. Not required on roof mounted ventilators or duct mounted ventilators provided with belt guards.

Welded Duct

by others

minimum of

18 in. (457

mm) above

roof deck

(per NFPA)

Recommended

Roof Opening

IMPORTANT

Screw

Optional NEMA 3R Disconnect factory wired from motor to disconnect through the breather tube

Optional Vented Curb Extension

Liquid Tight Flexible Conduit by Others

Upblast Centrifugal Roof Exhaust Fans

Electric Connection Emergency Smoke Control

The motor’s amperage and voltage rating must be checked for compatibility to the supply voltage prior to ﬁnal electrical connection. Also, the motor itself cannot have thermal overload.

For emergency smoke removal application, the electrical supply must enter the motor compartment through the breather tube. Disconnect must be mounted outside the fans motor compartment. Consult local code authorities for your speciﬁc requirements. Shown below is the UL Listed label that the fan will bear.

IMPORTANT

Power Ventilator For Smoke Control Systems 76Y9

connection use wires rated for at least 194˚F (90˚C). INSTALLATION - When connecting electrical power to this

fan, do not restrict motor movement for possible future belt or wheel adjustment.

CAUTION - Mount with the lowest moving part at least 8ft (2.5m) above ﬂoor or grade level. Not required on roof mounted ventilators or duct mounted ventilators provided with belt guards.

Grease Trap Installation

Polypropylene trap designed to collect grease residue to avoid drainage onto roof surface. Follow all local codes, as well as the National Fire Protection Agency (NFPA) where applicable.

NFPA 96: Upblast fans shall have a drain directed to a readily accessible and visible grease receptacle not to exceed 1 gal. (3.8L)

Refer to Document 476370 - Grease Trap installation Installation, Operation and Maintenance Manual for parts listing and speciﬁc instructions.

Grease Trap Maintenance

Regular inspection of grease trap is recommended. Depending on the amount of grease discharged through the fan, the grease trap should be changed accordingly to ensure proper operation.

• Check grease absorber (if included) every month. Replace grease absorber after every cleaning and/ or as needed between cleanings.

• Replacement grease absorbers (P/N 476084) can be ordered from your local Representative.

Recommended Emergency Smoke Control Installation

Factory Installed Heat Bafﬂe

8 in. (203 mm)

minimum

Roof Deck

Screw

Recommended

Roof Opening

NEMA-3R Disconnect factory wired from motor to disconnect through the breather tube

Liquid Tight Flexible Conduit by Others

Screw

Hinged Base

NFPA 96: A hinged base is required on upblast fans and in conjunction with grease trap accessory.

Refer to Document 462865 - Hinge Kit Installation, Operation and Maintenance Manual for parts listing and speciﬁc instructions.

For belt drive units in emergency smoke removal installations, the electrical supply must be kept out of the airstream. They may also require an isolated power supply so that if power is cut to the building in the event of a ﬁre, the fan will continue to operate. Check the local and national electrical codes for emergency smoke removal fans.

Upblast Centrifugal Roof Exhaust Fans

Pre-Starting Checks

1. Check all fasteners and set screws for tightness. The wheel should rotate freely and be aligned as shown in ﬁgure 7.

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

CUE unit - Centering height alignment can be

accomplished by loosening the set screws in the wheel and moving the wheel to the desired position.

CUBE unit - Centering can be accomplished by

loosening the bolts holding the drive frame to the shock mounts and repositioning the drive frame.

CUBE unit - Wheel and inlet cone overlap can be

adjusted by loosening the set screws in the wheel and moving the wheel to the desired position.

3. Check wheel rotation (viewing from the shaft side) by momentarily energizing the unit. Rotation should correspond to the rotation decal on the unit, see ﬁgure 8. If wheel rotation is incorrect, reverse two of the wiring leads or check motor wiring for single phase.

Wheel Overlap and Gap Dimensions

Model G - Overlap in (mm) H - Gap in (mm)

CUE 060-095 – 3/32 (2)

CUE 098-161 1/4

CUE 180-200 1/2 (13) –

CUBE 098 – 3/32 (2)

CUBE 099-161 1/4 (6) –

CUBE 180-300 1/2 (13) –

CUBE 360-480 3/4 (19) –

Fig. 7

(6) –

Model CUBE

Pre-Starting Belt Tension Checks

4. Always loosen tension enough to install belts without stretching, see ﬁgure 9.

Belts

Fig. 9

5. For units with two groove pulleys, adjust so the tension is equal in both belts.

6. If adjustments are made, it is very important to check the pulleys for proper alignment. Misaligned pulleys lead to excessive belt wear vibration, noise and power loss, see ﬁgure 10.

Fig. 10

The fan has been checked for mechanical noises at the factory prior to shipment. If mechanical noise should develop, suggested corrective actions are offered in the Troubleshooting section.

Over tightening will cause excessive bearing wear and noise. Too little tension will cause slippage at startup and uneven wear.

Do not force belt(s). Forcing the belt(s)

will break the cords and cause belt failure

WARNING

IMPORTANT

Wheel Rotation

Clockwise Airﬂow

All CUE Models All CUBE Models

Fig. 8

WARNING

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

7. Belt tension can be adjusted by loosening four fasteners on the drive frame, see ﬁgure 11. The motor plate slides on the slotted adjusting arms and drive frame angles in the same manner.

Fasteners

(4) *Fasteners

*Identical fasteners on opposing side must also be loosened.

Fig. 11

Upblast Centrifugal Roof Exhaust Fans

8a. Sizes 071-161: Belts should be tensioned just

enough to prevent slippage at full load. Note: Belts should have a slight bow on the slack side while running at full load (see ﬁgure 12a).

8b. Sizes 180-540: Belt tension should be adjusted to

allow 1/64 in. (0.397 mm) of deﬂection per inch of belt span. For example, a 15 in. (381 mm) belt span should have 15/64 in. (0.234 mm) (or about 1⁄4 in. (6 mm)) of deﬂection with moderate thumb pressure at mid-point between pulleys (see ﬁgure 12b).

Deﬂection

Slack Side

Fig. 12a Fig. 12b

9. The adjustable motor pulley is factory set for the RPM speciﬁed. Speed can be increased by closing or decreased by opening the adjustable motor pulley.

10. Any increase in speed represents a substantial increase in the horsepower required by the unit.

11. Motor amperage should always be checked to avoid serious damage to the motor when speed is varied.

Operation: CUE / CUBE

1. Before starting up or operating fan, check all fasteners for tightness. In particular, check the setscrews in wheel hub (and pulleys, if applicable).

2. While in the OFF position or before connecting the fan to power, turn the fan wheel by hand to be sure it is not striking the venturi or any obstacle.

3. Start the fan and shut it off immediately to check rotation of the wheel with directional arrow in the motor compartment, see ﬁgure 8.

4. When the fan is started, observe the operation and check for any unusual noises.

5. With the system in full operation and all ductwork attached, measure current input to the motor and compare with the nameplate rating to determine if the motor is operating under safe load conditions.

6. Keep inlets and approaches to fan clean and free from obstruction.

IMPORTANT

Adjust (tighten) belt tension after the first 24-48 hours of operation.

Inspection: CUE / CUBE

Inspection of the fan should be conducted at the ﬁrst 30 minute and 24 hour intervals of satisfactory operation.

30 Minute Interval

Inspect bolts, setscrews and motor mounting bolts. Adjust and tighten as necessary.

24 Hour Interval

Check all internal components. On CUBE unit only, inspect belt alignment and tension. Adjust and tighten as necessary.

Maintenance: CUE / CUBE

Installation and maintenance are to be performed only by qualiﬁed personnel who are familiar with local codes and regulations and who are experienced with this type of equipment.

Motor maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited to exterior surfaces only. Removing dust buildup on motor housing ensures proper motor cooling.

Greasing of motors is only intended when ﬁttings are provided. Many fractional horsepower motors are permanently lubricated and should not be lubricated after installation. Motors supplied with grease ﬁttings should be greased in accordance with manufacturers’ recommendations. Where motor temperatures do not exceed 104ºF (40ºC), the grease should be replaced after 2,000 hours of running time as a general rule.

Wheels require very little attention when moving clean air. Occasionally, oil and dust may accumulate causing imbalance. When this occurs the wheel and housing should be cleaned to ensure smooth and safe operation.

All fasteners should be checked for tightness each time maintenance checks are performed prior to restarting unit.

A proper maintenance program will help these units deliver years of dependable service.

WARNING

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

CAUTION

Uneven cleaning of the wheel will produce an out of balance condition that will cause vibration in the fan.

WARNING

This unit should be made non-functional when cleaning the wheel or housing (fuses removed, disconnect locked off).

Upblast Centrifugal Roof Exhaust Fans

Belt/Bearing Maintenance CUBE Unit

1. Belts tend to stretch after a period of time. They should be checked periodically for wear and tightness. When replacing belts, use the same type as supplied with the unit.

2. Matched belts should always be used on units with multi-groove pulleys.

3. For belt replacement, loosen the tensioning device enough to allow removal of the belt by hand.

4. Once installed, adjust belts as shown in “Pre-Starting Checks.”

5. Shaft bearings can be classiﬁed in two groups: relubricating and non-relubricating. All non-relubricating bearings on standard Model CUBE fans are factory lubricated and require no further lubrication under normal use (between

-20º to 180ºF (-29º to 82ºC) in a relatively clean environment).

6. On CUBE belt driven fans, the standard cast pillow block bearings are factory lubricated and are provided with external grease ﬁttings. Annual lubrication is recommended, or more frequently if needed, see Table 2. Do not over-grease. Use only one or two shots of lubricant with a hand gun. Maximum hand gun rating is 40 psi. Rotate bearings during lubrication where good safety practice permits. Caution should be employed to prevent over packing or contamination. Grease ﬁttings should be wiped clean. Extreme care should be used around moving parts.

7. Grease should be pumped in very slowly until a slight bead forms around the seal. A high grade lithium base grease should be used.

8. When installing restaurant exhaust applications follow NFPA 70 for cleaning fans.

9. Grease containers must be emptied at regular intervals to prevent overﬂow.

10. To ensure tightness, check pulley setscrews. Proper keys must be in keyways.

11. Fan RPM should not be readjusted. Only use pulleys of identical size and type when replacing pulleys.

12. During the ﬁrst few months of operation check bearing set screws periodically to ensure tightness.

13. If unit is to be left idle for an extended period, remove belts and store in a cool, dry place to avoid premature belt failure.

Recommended Relubrication Frequency in Months

NOTE: If unusual environment conditions exist (extreme temperature, moisture or contaminants) more frequent lubrication is required.

A good quality lithium base grease, conforming to NLGI Grade 2 consistency, such as those listed here may be used.

Table 2: Suggested Fan Bearing Greasing Intervals

Interval

(months)

1 to 3

3 to 6

6 to 12

12 to 18 Infrequent operation or light duty in clean atmosphere

Manufacturer Grease (NLGI #2)

U.S. Electric Motors Grease No. 83343

Chevron U.S.A. Inc Chevron SRI Grease #2

Mobil Oil Corporation

Texaco, Inc.

Amoco Oil Co. Rykon Premium #2

Exxon Unirex N2

Shell B Shell Alvania #2

Heavy duty in dirty, dusty locations; high ambient temperatures; moisture laden atmosphere; vibration.

12 to 24 hours per day, heavy duty, or if moisture is present

8 to 16 hours per day in clean, relatively dry atmosphere

Table 3: Grease Manufacturers

Type of Service

Mobilith

Mobil 532

Premium BRB #2

Texaco Multifak #2

Fan Inlet Connections

In order to assure proper fan performance, caution must be exercised in fan placement and connection to the ventilation system. Obstructions, transitions, poorly designed elbows, improperly selected dampers, etc, can cause reduced performance, excessive noise and increased mechanical stress. For performance to be as published, the system must provide uniform and stable airﬂow into the fan.

Good

Poor

Dampers must open fully. Use motorized dampers in low airflow applications to reduce losses.

Poor

Avoid sharp turns or entrance conditions which cause uneven flow. Use turning vanes in elbows to reduce adverse effects.

Provide uniform airflow at fan inlet to assure optimum performance.

Good

Provide uniform airflow at fan inlet and through the damper to assure optimum performance. The curb cap should be three wheel diameters from the radius. Use turning vanes in duct when possible.

Upblast Centrifugal Roof Exhaust Fans

CUE Direct Drive Centrifugal Roof Exhaust Fan

Motor Cover

Hoodband

Motor

Shock

Mounts

Wheel

Conduit

Chase

Windband

Grease

Trough

Hood Clip

Disconnect

Motor Support Pan

Horizontal Support

Vertical Support

Breather Tube

Birdguard

Parts List

NOTE

Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information will assist the local representative and the factory in providing service and replacement parts. Before taking any corrective action, make certain unit is not capable of operation during repairs.

CAUTION

A fan manufactured with an explosion resistant motor does not certify the entire unit to be explosion proof.

Note: For replacement, the windband, vertical supports, drain trough and curb cap/venturi come as one complete assembly.

Curb Cap/

Venturi

CUBE Belt Drive Centrifugal Roof Exhaust Fan

Motor Cover

Hoodband

Shaft Pulley

Disconnect

Shock Mounts

Drive Frame

Assembly

Horizontal

Support

Belt

Motor Pulley

Motor

Hoodband Bracket

Fan Shaft

Wheel

Windband

Curb Cap/

Venturi

Upblast Centrifugal Roof Exhaust Fans

Vertical Support

Breather Tube

(Birdguard in Breather Tube)

Troubleshooting

WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.

PROBLEM CAUSE CORRECTIVE ACTION

Excessive noise

or vibration

High horsepower

Fan does

not operate

Motor overloads

or overheats

Reduced airﬂow

Wheel rubbing inlet

V-belt drive

Bearings

Wheel unbalance

Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.

Tighten pulleys on motor/fan shaft. Adjust belt tension. Align pulleys properly, see page 7/figure 9-10. Replace worn belts or pulleys.

Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.

Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.

Bad bearings Replace.

Belts too tight or too loose Adjust tension, see ﬁgure 12a-b.

Wheel improperly aligned and rubbing

Center wheel on inlet, see ﬁgure 7.

Loose drive or motor pulleys Align and tighten. See “Pre-Starting Checks”, see page 7-8.

Foreign objects in wheel or housing Remove objects, check for damage or unbalance.

Fan base not securely anchored Secure properly.

Motor hood loose and rattling Tighten fasteners to secure the motor hood.

Defective or loose motor bearings Replace motor with same frame size, RPM-HP

Fan

Duct system

Electrical supply

Check rotation of wheel, see figure 8. Reduce fan speed.

Resize ductwork. Check proper operation of face and bypass dampers. Check filters and access doors.

Check fuses/circuit breakers. Check for switches off. Check for correct supply voltage.

Drive Check for broken belts. Tighten loose pulleys or belts.

Motor

Assure motor is correct horsepower and not tripping overload protector.

Lubrication Check for excessive or insufficient grease in the bearing.

Mechanical

Replace damaged bearing. Relieve excessive belt tension. Align bearings. Check for bent shaft.

Belt slippage Adjust tension or replace bad belts, see page 7-8.

Over/Under line voltage Contact power company.

Incorrect wheel rotation Check motor wiring. See ﬁgure 8.

Wheel RPM too high

Check drives or slow down fan by opening variable pitch pulley on motor shaft.

Undersized motor Check motor ratings with catalog speed and air capacity chart.

Motor wired incorrectly Check motor wiring to wiring diagram located on fan motor.

System resistance too high

Check system: Proper operation of backdraft or control dampers, obstruction in ductwork, clean dirty ﬁlters.

Unit running backwards Correct as shown in ﬁgure 8.

Excessive dirt buildup on wheels Clean wheel.

Improper wheel alignment Center wheel on inlets, see Pre-Starting checks and ﬁgure 7.

Dampers closed Inspect and repair.

Blocked duct/clogged ﬁlter Clean or replace.

Belt slippage Replace and adjust tension.

Speed too slow Check for correct drives.

Upblast Centrifugal Roof Exhaust Fans

Our Commitment

As a result of our commitment to continuous improvement, Greenheck reserves the right to change speciﬁcations without notice.

Speciﬁc Greenheck product warranties are located on greenheck.com within the product area tabs and in the Library under Warranties.

Greenheck’s Centrifugal Upblast and Sidewall Exhaust catalog provides additional information describing the equipment, fan performance, available accessories, and speciﬁcation data.

Phone: 715.359.6171 • Fax: 715.355.2399 • Parts: 800.355.5354 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com

AMCA Publication 410-96, Safety Practices for Users and Installers of Industrial and Commercial Fans, provides additional safety information. This publication can be obtained from AMCA International, Inc. at www.amca.org.

Greenheck CUE, CUBE User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual