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IS183-17E  

J&D Manufacturing • 6200 Hwy 12 • Eau Claire, WI 54701 • 1-800-998-2398 • www.jdmfg.com 

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Construct structurally sound 77” 

square rough opening.

Correct orientation of fan. Drainage 

holes down. NOTE: Drainage holes 

MUST

 be free from obstruction.

77”

77”

ROUGH

OPENING

(Inside Dimensions)

Please read over all instructions carefully before you begin. 

If you have any questions please call your local dealer, or 

contact J&D Manufacturing at 1-800-998-2398. 

INSTALLATION

PARTS LEGEND

INCLUDED ASSEMBLY HARDWARE - TO SCALE

MEGA STORM 

72” FIBERGLASS EXHAUST FAN

WARRANTY

J&D Manufacturing warrants all products are free from defects in materials and 

workmanship under normal use for the period of one year from date of purchase. 

Our warranty does not cover normal or regular wear and tear. J&D Manufacturing 

can repair or replace at our option, any product or part of the product that is found 

to be defective. Our warranty applies to materials only, and does not include return 

freight, delivery, loss or damage to personal property, cost of removal or 

installation, any incidental or consequential damages or labor. This warranty does 

not apply to products which are misused, abused, altered, improperly installed or 

subject to negligence. All warranties must be approved through our warranty 

department. The original purchaser must present a copy of the invoice for the 

defective product. One year is our standard warranty unless specified on our 

literature or in the installation instructions or user manuals.  

RECOMMENDED TOOLS FOR INSTALLATION AND ASSEMBLY  

(NOT PROVIDED)

INSTALLATION HARDWARE IS NOT PROVIDED

Guard

(14) Stainless Steel Rivet

3/16” x 1/2"

(14) Backup Washer

3/16”ID x 1/2"OD

(14)

Shutter Clips

Shutter

(8) Nylock Flange Nut

5/16”-18

Housing

View from inlet side of fan

Drainage Holes

Measuring Tape 

Safety Glasses

1/2" Socket

Socket Wrench

Rivet Gun

(8) Carriage Bolt

5/16”-18 x 1”

Drill

 and Drill Bit

3/8”

Summary of Contents for MEGA STORM

Page 1: ...t or part of the product that is found to be defective Our warranty applies to materials only and does not include return freight delivery loss or damage to personal property cost of removal or installation any incidental or consequential damages or labor This warranty does not apply to products which are misused abused altered improperly installed or subject to negligence All warranties must be a...

Page 2: ...nting Foot Carriage Bolt Assembly Side View 1 Mark all remaining guard footing locations 1 from venturi edge Drill holes using 3 8 bit and insert bolts and nuts exactly as you did in step 1 Once all bolts and nuts are installed go back and tighten each securely Fan Flange Shutter Clip Rivet Washer Rivet Washer Fan Flange Shutter Clip 3a 3b Using the 14 pre drilled holes in the housing flange attac...

Page 3: ...ate freely and not come in contact with the housing Connecting power to the unit Install manual disconnect switch inside building adjacent to fan Route wire to motor with drip loop and secure Drip loop will drain accumulated moisture away from the motor Configure internal wires to match supply voltage and wire according to motor nameplate Test to verify correct rotation Shut off manual disconnect ...

Page 4: ...ed technician Lubrication If fan motor has grease fittings adhere to the lubrication schedule and quantity as stated on yellow motor label If fan motor does not have grease fittings it is sealed and does not require additional lubrication Every 4 months or as required remove dust and debris from shutter louvers fan blades motor fan housing guards If using a pressure or power washer to clean unit a...

Page 5: ...nclude return freight delivery loss or damage to personal property cost of removal or installation any incidental or consequential damages or labor This warranty does not apply to products which are misused abused altered improperly installed or subject to negligence All warranties must be approved through our warranty department The original purchaser must present a copy of the invoice for the de...

Page 6: ...with a rivet gun using 14 3 16 rivets and 14 3 16 backup washers Review the illustrations below for placement and assembly Measure and mark the exterior of the venturi 2 from edge of opening as shown in illustration These will be your guides for properly installing the cone in Step 6 e d g e o f v e n t u r i 2 1 2 4 4 From the inside of your structure insert fan into the finished opening Interior...

Page 7: ...idewalls of the housing DO NOT distort the housing Venturi must not be distorted and prop must be able to rotate freely and not come in contact with the housing 5 7 Slide cone onto venturi so that venturi and cone overlap by 2 Use marks made in Step 2 as your guide 6 Place guard onto cone flange Using the guard mounting feet as guides and a 5 16 drill bit drill holes through cone flange Secure the...

Page 8: ...hutter clips over shutter flange 10 MAINTENANCE INSTRUCTIONS Failure to follow maintenance instructions will void warranty drainage holes To prevent serious injury or death disconnect power before cleaning or maintaining fan or fan motor Service and repair of fan and motor should only be completed by a qualified technician Lubrication If fan motor has grease fittings adhere to the lubrication sche...

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