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1.  With inlet guard not installed, spin the blade assembly by hand and make sure that the blade 

assembly rotates freely and did not shift during shipment.  If the blades rub in the fan housing, refer 
to Page 8 for instructions on centering the blade assembly. 

2.  Check belt for proper tension. 
3.  Check motor pulley, driven disc and idler pulley (if present) for proper alignment. 
4.  Check to make sure all fasteners are properly tightened. 
5.  Check circuit phase, voltage and wiring connection against that shown on motor nameplate. 
6.  Check for correct fan rotation. 
7.  Replace the inlet guard.  The fan is now ready for proper operation. 

INITIAL STARTUP 

MAINTENANCE 

CLEANING  

• 

The fan should be cleaned regularly.  Always turn the fan off before cleaning.  

• 

The motor should be wiped with a cloth or a brush.  This will keep the motor running cool.  

DO NOT 

pressure 

wash the motor.   

• 

The blades should be wiped clean to maintain maximum air performance and minimize fan imbalance.  

DO 

NOT 

pressure wash the center of the disc assembly, or premature bearing failure may be induced.   

• 

The damper door assembly should be wiped clean so that the doors will pivot freely, open completely, and 
close securely. 

• 

The interior sides of the fan, wall housing & doors, should be washed properly after disinfecting the house to 
prevent rusting.  We recommend using Simple Green detergent or a similar product.  

CHECK FASTENERS 

Inspect all fasteners on the fan.  This is a very important safety issue.  If any loose hardware is found, tighten it 
immediately. 

CHECK BELT TENSION 

The belt must have proper tension to insure proper fan speed and maximum air performance.  

CHECK DRIVE ALIGNMENT 

The belt must be properly aligned in the pulleys to minimize pulley and belt wear.  Refer to Page 8 for instructions. 

CHECK DOOR-RING GASKET 

The door-ring is lined with a foam rubber gasket material.  This gasket provides a seal between the door-ring and 
the doors, insuring proper door function and minimizing air leakage.  This gasket should be checked periodically to 
make sure it is intact and properly sealed to the door-ring.  If the material should come loose from the door-ring, it 
must be re-sealed to the door-ring with appropriate adhesive. 

Page 11 

Summary of Contents for MNBCDD54

Page 1: ...s coolair com MNEFDD54L MNEFDD54M MNBCDD54L MNBCDD54M UNPACKING Inspect the fan for signs of shipping damage It is the responsibility of the customer to report any shipping damage to the freight carri...

Page 2: ...FRAMING Page 2 FRAME CONSTRUCTION RECOMMENDED MINIMUM SPACING IS 16 Figure 2 58 3 4 SQ I D Spacing POST CONSTRUCTION Figure 3 4 x 4 Post 58 3 4 SQ I D...

Page 3: ...two 1 4 whiz lock nuts fasten the two sheets at the overlapping holes on the inside corner of the two sheets Push the bolts from the outside in and thread the nuts on the inside This process should b...

Page 4: ...pulley and the fan hub pulley If necessary loosen the motor pulley set screw and or the motor mounting bolts and adjust as necessary Re tighten pulley set screw and motor mounting bolts IMPORTANT Mot...

Page 5: ...by finding the bottom cone quarter panel and one of the other panels side panel Place these two panels such that the edge of the side panel overlaps the bottom panel and the holes on the overlapping e...

Page 6: ...rocess on the opposite side for the other handle Figure 11 shows the handle placement To mount the cone assembly pick the assembly up by the handles and place the top of the smaller end over the fan p...

Page 7: ...et The other end of each spring should be attached to the inside door hole in the damper door To check for proper damper operation open the doors fully and allow them to close If either door fails to...

Page 8: ...side of the fan orifice it will be necessary to loosen the two 2 3 8 bolts that secure the blade assembly s hexagonal shaft to the fan x braces center the blade assembly and tighten the bolts to 25 30...

Page 9: ...n the idler arm see Figure 19 Re tighten the 3 8 bolt Turn the blade assembly by hand to insure free rotation Do Not Over Tension The Belt This will cause premature belt and bearing failure To check t...

Page 10: ...d cone See Figure 20 WARNING Protect Fan and Cone from Snow and Ice Buildup WARNING Fan and or cone damage caused by this type of external source WILL NOT be covered by AMERICAN COOLAIR warranties Fig...

Page 11: ...e disc assembly or premature bearing failure may be induced The damper door assembly should be wiped clean so that the doors will pivot freely open completely and close securely The interior sides of...

Page 12: ...USE UNLESS ELECTRICAL WIRING COMPLIES WITH ALL APPLICABLE CODES DO NOT WIRE WITHOUT PROVIDING FOR A POWER SOURCE DISCONNECT AT THE FAN ITSELF DO NOT SERVICE EXCEPT BY A QUALIFIED MAINTENANCE TECHNICIA...

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