Greenheck CUBE-101, CUBE-131, CUBE-101HP, CUBE-121, CUBE-141 Installation, Operating And Maintenance Manual

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Page 1

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

Move fan to desired location and fasten securely through mounting holes in base. Shims may be necessary depending upon roofing material thickness. The diagram below shows dimensions for Model CUBE.

Access to the motor compartment is accomplished by removing the screws designated “R” in Fig. 1. The cover can then be removed and placed on a flat surface in an area protected from strong winds.

The motor’s amperage and voltage rating must be checked for compatibility to the supply voltage prior to final electrical connection. For NFPA - restaurant CUBE 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.

Consult local code authorities for your specific requirements.

A drain trough is provided on all CUBE fans for single-point drainage of water and residue. Some means for collection of this residue must be provided, either a container directly under the trough or use of an adapter and pipe to carry the residue to a remote collection point. An optional grease trap with water separator baffles is available from your Greenheck representative.

Installation, Operating and Maintenance Manual

READ AND SAVE THESE INSTRUCTIONS

Model CUBE Belt Drive

Upblast Centrifugal

Roof Exhaust Fan

PN 457693

MODEL A B *C D

Shaft

Bearings

Damper

Size

Roof

Opening

Approx.

Unit

Weight

CUBE-098, 101, 101HP, 121, 131 19 24

/8 281/4 173/83/4 12x12 141/2 x 141/2 66

CUBE-141, 141HP

CUBE-161, 161HP, 161XP

22 28

/8 293/4 193/83/4 16x16 181/2 x 181/2 87

CUBE-180

CUBE-180HP 1

126

CUBE-200

30 35

/8 285/8 21

18x18 201/2 x 201/2

CUBE-200HP 1

142

CUBE-220, 220HP

CUBE-240, 240HP, 240XP

34 42

/4 337/8 251/2 1 24x24 261/2 x 261/2 175

CUBE-300, 300HP, 300XP 40 50 36 29 1 30x30 32

/2 x 321/2 313

CUBE-360, 360HP, 360XP 46 58

/8 391/8 293/8 36x36 381/2 x 381/2 440

CUBE-420 52 65

16 44

4 35

11/4

42x42 441/

2 x 44

2 578

CUBE-480 58 74

16 48

8 36 1

2 48x48 50

2 x 50

2 675

Dimension “A” is the inside dimension of the curb cap. The roof curb should be 11/2 in. less than the curb cap to allow for roofing and flashing.

All dimensions are in inches. *May vary depending on motor size.

Dimensional Data

/4 in.

Fig. 1

Installations

Recommended General Ventilation Installation

Recommended Commerical Kitchen Installation

/4 in.

8 in. or 12 in. min.

Wiring by

Others

Damper

Roof Deck

11/4 in.

Recommended

Duct and

Damper Size

Recommended

Roof Opening

Minimum 40 in.

Discharge

Height

(per NFPA)

Grease Trap

8 in. min.

Welded Duct

by others

min. of 18 in.

above roof

deck (per

NF PA)

Roof Deck

Recommended

Roof Opening

Factory Wired Motor to Disconnect

11/4 in.

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

Vented Curb Extension

Liquid Tight Flexible Conduit by Others

Page 2

WHEEL ROTATION

All CUBE fans have CW wheel rotation when viewed from top of fan.

WHEEL OVERLAP DIMENSIONS

Fig. 2

Fig. 3

Fig. 4

Fig. 6

Fig. 5

Direction of wheel rotation is critical. Reversed rotation will result in poor air performance, motor overloading and possible burnout. Check wheel rotation (viewing from the shaft side) by momentarily energizing the unit. Rotation should be clockwise as shown in Fig. 3 and correspond to the rotation decal on the unit.

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 Fig. 4 )

For all CUBE units belt tension can be adjusted by loosening four fasteners (marked “R”) on the drive frame. The motor plate slides on the slotted adjusting arms and drive frame angles in the same manner (see Fig. 5). Belt tension should be adjusted to allow 1/64 inch of deflection per inch of belt span. For example, a 15 inch belt span should have 15/64 inch (or about 1/4 inch) of deflection with moderate thumb pressure at mid-point between pulleys. (See Fig. 6). Overtightening will cause excessive bearing wear and noise. Too little tension will cause slippage at startup and uneven wear.

The adjustable motor pulley is factory set for the RPM specified. Speed can be increased by closing or decreased by opening the adjustable motor sheave. Two groove variable pitch pulleys must be adjusted an equal number of turns open or closed. Any increase in speed represents a substantial increase in the horsepower required by a unit. Motor amperage should always be checked to avoid serious damage to the motor when speed is varied.

CORRECT WRONG WRONG WRONG

Belt Span

Deflection =

Belt Span

NOTE: Identical fasteners on opposing side

Pre-Starting Checks

Check all fasteners for tightness. The wheel should rotate freely and be aligned as shown in Fig. 2. Wheel position is preset and the unit is test run at the factory. Movement may occur during shipment, and realignment may be necessary. Centering can be accomplished by loosening the bolts holding the drive frame to the shock mounts and repositioning the drive frame. Wheel and inlet cone overlap can be adjusted by loosening the set screws in the wheel and moving the wheel to the desired position.

MODEL G

098-161 1/4 in.

180-300 1/2 in.

360-480 3/4 in.

Page 3

MAINTENANCE

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. Matched belts should always be used on units with multigroove pulleys. For belt replacement, loosen the tensioning device far enough to allow removal of the belt by hand. Do not force belts on or off. This may cause cords to break, leading to premature belt failure. Once installed, adjust belts as shown in “Pre-Starting Checks.”

Shaft bearings can be classified in two groups: relubricating and non-relubricating. All bearings on standard Model CUBE fans are factory lubricated and require no further lubrication under normal use (between -20°F and 180°F in a relatively clean environment). Units installed in hot, humid or dirty locations should be equipped with special bearings. These bearings will require frequent lubrication. Caution should be employed to prevent overpacking or contamination. Grease fittings should be wiped clean. The unit should be in operation while lubricating. Extreme care should be used around moving parts. Grease should be pumped in very slowly until a slight bead forms around the seal. A high grade lithium base grease is recommended.

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 motors are permanently lubricated and should not be lubricated further. Motors supplied with grease fittings should be greased in accordance with manufacturers’ recommendations. Where motor temperatures do not exceed 104°F (40°C), the grease should be replaced after 2000 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.

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

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.

CAUSE CORRECTIVE ACTION

System resistance too high Check system: Proper operation of

backdraft or control dampers, obstruction in ductwork, etc.

Unit running backwards Correct as shown in Fig. 3.

Excessive dirt buildup on wheels Clean wheel.

Improper wheel alignment Center wheel on inlets.

Bad bearings Replace.

Belts too tight or too loose Refer to Fig. 6 and adjust tension.

Wheel improperly aligned and Center wheel on inlets. See Fig. 2. rubbing

Loose drive or motor pulleys Align and tighten. See “Pre-Starting

Checks.”

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

Unbalance of wheel caused by Remove buildup. excessive dirt and grease buildup

REDUCED

AIRFLOW

PROBLEM

EXCESSIVE

NOISE OR

VIBRATION

TROUBLESHOOTING

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

Page 4

WARRANTY

Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the date of purchase. Any units or parts which prove to be defective during the warranty period will be replaced at our option when returned to our factory, transportation prepaid. Motors are warranted by the motor manufacturer for a period of one year. Should motors furnished by Greenheck prove defective during this period, theyshould be returned to the nearest authorized motor service station. Greenheck will not be responsible for any removal or installation costs.

IOM CUBE FS

Rev. 3 January 2005

NOTE: Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information

will assist the local Greenheck representative and the factory in providing service and replacement parts.

PARTS LIST

GREENHECK

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

PH. 715-359-6171

www.greenheck.com

* For replacement, the windband, vertical supports, drain

trough and curb cap/venturi come as one complete assembly.

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

BEARINGS

FAN SHAFT

DRIVE FRAME ASSEMBLY

BIRDGUARD

*VERTICAL SUPPORTS

CONDUIT CHASE

*DRAIN TROUGH

*CURB CAP / VENTURI

SHAFT PULLEY

BELT

MOTOR PULLEY

HOOD

MOTOR

HOOD BAND

BREATHER TUBE

SHOCK MOUNTS (4)

*WINDBANDS

WHEEL