Greenheck Fan Ventilation Hood Hooded Propeller Roof Fans User Manual

Part # 455305  
READ AND SAVE THESE INSTRUCTIONS  
Hooded Propeller Roof Fans  
Belt Drive and Direct Drive  
GREENHECK  
P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410  
PH. 715-359-6171  
®
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.  
All dimensions given in inches  
Exhaust /Supply (Direct Drive Sizes 18-54 - Belt Drive Sizes 20-72)  
Standard  
Base  
Tall  
A
Damper Roof  
Fan  
Base  
Base  
Sq.  
C
W x L  
Size  
Sq.  
Opg.  
Sq.  
Size  
W
B
D
10  
11  
11  
14  
TB  
TD  
18  
20  
24  
30  
36  
42  
48  
54  
60  
72  
281/4  
301/4  
341/4  
401/4  
461/4  
521/4  
581/4  
641/4  
701/4  
821/2  
13  
16  
18  
20  
22  
24  
24  
261/2  
261/2  
29  
23  
27  
29  
34  
401/4  
441/4  
461/4  
511/4  
563/4  
593/4  
603/4  
661/4  
671/4  
701/4  
271/4  
281/4  
281/4  
311/4  
343/4  
353/4  
363/4 93 x 111  
393/4 112 x 111  
403/4 124 x 123  
411/4 136 x 135  
48 x 51  
54 x 51  
66 x 63  
75 x 75  
88 x 87  
86 x 99  
18  
20  
24  
30  
36  
42  
48  
54  
60  
72  
201/2  
221/2  
261/2  
321/2  
381/2  
441/2  
501/2  
561/2  
621/2  
741/2  
C
D
B
TB  
391/2 171/2  
421/2 181/2  
431/2 191/2  
TD  
Tall Base Option  
A sq.  
49  
50  
53  
221/2  
231/2  
24  
21/2"  
Filtered Supply (Belt Drive Sizes Only 20 - 72)  
L
Standard  
Base  
Tall  
A
Damper Roof  
Fan  
Base  
Base  
Sq.  
C
W x L  
Size  
Sq.  
Opg.  
Sq.  
Size  
B
D
11  
11  
14  
TB  
TD  
20  
24  
30  
36  
42  
48  
54  
60  
72  
301/4  
341/4  
401/4  
461/4  
521/4  
581/4  
641/4  
701/4  
821/2  
16  
18  
20  
22  
24  
27  
29  
34  
441/4  
461/4  
511/4  
563/4  
593/4  
603/4  
661/4  
671/4  
701/4  
281/4  
281/4  
311/4  
343/4  
353/4  
363/4 112 x 111  
393/4 124 x 123  
403/4 136 x 135  
411/4 136 x 147  
54x 51  
66 x 63  
78 x 87  
94 x 87  
93 x 99  
20  
24  
30  
36  
42  
48  
54  
60  
72  
221/2  
261/2  
321/2  
381/2  
441/2  
501/2  
561/2  
621/2  
741/2  
391/2 171/2  
421/2 181/2  
431/2 191/2  
Tall Base Option  
A sq.  
24  
261/2  
261/2  
29  
49  
50  
53  
221/2  
231/2  
24  
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.  
Fig. 1  
- Removing one interlocking hood end section of  
smaller units  
Fasteners  
 
BEARINGS (For belt drive fans only)  
Bearings are the most critical moving part of the fan and should be inspected at periodic intervals. Locking collars  
and set screws, in addition to fasteners attaching the bearings to the bearing plate, must be checked for tightness. In a  
clean environment and temperatures above 32°F./below 200° F., fan shaft bearings with grease fittings  
should be lubricated semi-annually using a high quality lithium based grease. If unusual environmental conditions exist  
temperatures below 32°F./above 200°F., moisture or contaminants, more frequent lubrication is required.  
With the unit running, add grease very slowly with a manual grease gun until a slight bead of grease forms at  
the seal. Be careful not to unseat the seal by over lubricating or using excessive pressure. Bearings without grease fittings are  
lubricated for life.  
FASTENERS AND SET SCREWS  
Any fan vibration has a tendency to loosen mechanical fasteners. A periodic inspection should include checking all  
fasteners and set screws for tightness. Particular attention should be paid to set screws attaching the propeller to the  
shaft and the shaft to the bearings. Loose bearing set screws will lead to premature failure of the fan shaft.  
LUBRICATION  
Refer to the paragraph on bearings for bearing lubrication. Many fractional horsepower motors installed on the smaller fans are  
lubricated for life and require no further attention. Motors equipped with oil holes should be oiled in accordance with the  
manufacturer's instructions printed on the motor. Use a high grade SAE 20 machine oil and use caution not to over lubricate.  
Motors supplied with grease fittings should be greased according to directions printed on the motor.  
REMOVAL OF DUST AND DIRT  
Dirt clogs cooling openings on the motor housing, contaminates bearing lubricant and collects on propeller blades  
causing severe imbalance if left unchecked. The exterior surface of the motor, fan panel and entire propeller should be  
thoroughly cleaned periodically. Use caution and do not allow water or solvents to enter the motor or bearings. Under no  
circumstances should motors or bearings be sprayed with steam or water.  
DAMPER INSPECTION AND SERVICE  
If an optional tall base with damper is supplied, access to the optional dampers and actuators is provided by a removable door.  
Simply release the two cam latches and slide the damper out for inspection, cleaning or service.  
For fan sizes 24 through 36 supplied without a tall base, the entire unit must be lifted off the roof curb for access to the damper.  
For fan sizes 42 through 72 suppled without a tall base, access to the damper is made by removing one end birdscreen or filter  
and working on the damper from above. SEE WARNING ON PAGE 2.  
FILTER MAINTENANCE (FILTERED SUPPLY FANS)  
Aluminum mesh filters should be cleaned on a regular basis  
for optimum fan efficiency. The frequency of cleaning  
depends upon the cleanliness of the incoming air.  
To remove filters on fan sizes 24 to 30, first remove the hood  
as shown in fig.1. The filters can then be pulled from the  
slide-out racks (shown in photo). On fan sizes 36 to 60,  
access panels on the end panels are provided which allow  
the filters to be removed without removing the hood.  
Filters should be washed with a mild detergent in warm  
water. After the filters are dry, an adhesive spray available at  
most filter distributors may be applied to increase filter  
efficiency.  
Sliding filter out of filter rack.  
 
TROUBLESHOOTING  
PROBLEM  
CAUSE  
CORRECTIVE ACTION  
System resistance is too high.  
Check backdraft dampers for proper operation.  
Remove obstructions in ductwork. Clean dirty  
filters. Check for adequate supply air for  
exhaust fans or exhaust air for supply fans.  
Reduced airflow  
Fan too close to damper.  
Unit running backwards.  
Fan speed too low.  
Excessive dirt on propeller.  
Bearings  
Increase distance between fan and damper.  
See pre-starting checks.  
Increase fan speed.  
Clean propeller.  
Tighten bearing collars and set screws  
Lubricate bearings. Replace defective bearings.  
V-Belt drive  
Tighten pulleys on motor and fan shaft. Adjust  
belt tension. Align pulleys. Replace worn belts  
or pulleys. See "Routine Maintenance".  
Excessive Noise  
Excessive vibration  
Remove dirt build-up from propeller. Check all set  
screws and fasteners for tightness. Check for  
worn bearing. Correct propeller imbalance.  
Check for loose dampers, guards or ductwork.  
Defective Motor  
Replace motor.  
Motor load amperage must be checked and compared to nameplate rating to avoid serious damage to motor when speed is increased.  
Belt Drive Fans Parts List  
Direct Drive Fans Parts List  
10  
6
4
7
5
9
4
3
8
3
5
2
2
1
1
1. Fan Panel  
2. Propeller  
1. Fan Panel  
2. Propeller  
3. Drive Frame Channel (2)  
4. Motor Plate  
5. Motor  
3. Drive Frame Channel (2)  
4. Motor Plate  
5. Motor  
6. Motor Pulley  
7. Shaft Pulley  
8. Fan Shaft  
9. Bearings (2)  
10. Belt  
11. Bearing Plate (Level 3 fans only - not shown)  
IOM RB 10-95  
 

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