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INSTALLATION INSTRUCTIONS 

FOR 

DUCTED WHOLE HOUSE FANS 

 

 

Fan Models: CX1401, CX1801 

Read all warnings and instructions before beginning to install this fan.

 

WARNING

 – TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO 

PERSONS, OBSERVE THE FOLLOWING: 

a)

 

Installation work and electrical wiring must be done by qualified person(s) in accordance with all 
applicable codes and standards, including fire-rated construction. 

b)

 

Sufficient air is needed for proper combustion and exhausting of gases through the flue 
(chimney) of fuel burning equipment to prevent back drafting. Follow the heating equipment 
manufacturer’s guideline and safety standards such as those published by the National Fire 
Protection Association (NFPA), and the American Society for Heating, Refrigeration and Air 
Conditioning Engineers (ASHRAE), and the local code authorities. 

c)

 

When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden 
utilities. 

d)

 

WARNING

 – 

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT USE THIS 

FAN WITH ANY SOLID-STATE SPEED CONTROL DEVICE.

 

e)

 

Use this unit only in the manner intended by the manufacturer. If you have questions, contact the 
manufacturer. 

f)

 

Before servicing or cleaning unit, switch power off at service panel and lock the service disconnecting 
means to prevent power from being switched on accidentally. When the service disconnecting means 
cannot be locked, securely fasten a prominent warning device, such as a tag, to the service panel. 
 

CAUTION 

 

DOUBLE CHECK FAN BLADES ARE SECURE TO HUB PRIOR TO INSTALLATION. 

BLADES CAN BE DAMAGED DURING SHIPMENT AND CAN BECOME A HAZARD 

UPON ACTIVATION OF MOTOR!

 

 

 

1.

 

This unit has an unguarded propeller. Do not use in locations readily accessible to people or animals. 

2.

 

For general ventilating use only. Do not use to exhaust hazardous or explosive materials and vapors. 

3.

 

Carbon monoxide is an odorless, colorless gas that can kill. It may be drawn into the house by operating 
this fan if your fuel-burning equipment is not properly maintained, or if you lack adequate attic space.

 

 

 

Summary of Contents for CX1401

Page 1: ...er hidden utilities d WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT USE THIS FAN WITH ANY SOLID STATE SPEED CONTROL DEVICE e Use this unit only in the manner intended by the manufacturer If you have questions contact the manufacturer f Before servicing or cleaning unit switch power off at service panel and lock the service disconnecting means to prevent power from being switched on a...

Page 2: ...surface size in half DO NOT OVERSIZE YOUR FAN Additional installation of exterior vents may be required to provide sufficient Net Free Exhaust Area NFA for your fan to operate safely and effectively Remember bigger is not always better with Whole House Fans A smaller fan that operates efficiently will always be preferable to a fan that is too big for its application Tools Needed Materials Needed D...

Page 3: ...ind a spot where you would like to install the damper assembly drill a small hole in the middle of this location in the ceiling material and feed a wire through to mark it in the attic space above Step 2 In the attic Find the wire that was fed through the ceiling below and check for wires pipes and other obstructions around the area where the product will be installed If anything is in the way of ...

Page 4: ...gle to use as guides for cutting the ceiling material from the living space below as shown in Figure A Optional but recommended Measure the exact length between the two ceiling joists between which you have marked the rectangle Cut two pieces of lumber 2x4 or larger to fit in between the two ceiling joists Place these pieces of lumber flush with the ceiling material in the attic and running in bet...

Page 5: ... from the damper box assembly due to the length of the provided duct The further away from the damper box assembly the fan can be installed the quieter the apparent operation of the fan will be in the living space below Using a 3 8 drill bit drill a hole in the location chosen This hole needs to be 1 up from the long flat edge of the rafter as shown in Figure D Attach the rafter bracket to the top...

Page 6: ...ion down to the damper assembly box Fit the duct transition over the top of the damper assembly box Ensure that it sits flush against the top of the damper assembly box as shown in Figure E Use the provided foil tape to seal the seam between the duct transition and damper assembly box to prevent air leakage when the unit is running D ...

Page 7: ...ce plate Keep these screws to re close the wiring box after wiring is completed Run a length of three conductor wire in between the fan wiring box and the location in the living space below where the switches will be installed There should also be the two conductor wire run from the power supply panel or breaker box to the switch location Connect the fan High speed Black to the Black wire of the t...

Page 8: ...o the bottom left terminal of the High Low switch LOW Connect the incoming common wire usually White to the wire from the common lead White of the motor Connect the incoming ground wire usually bare copper to the grounding screws on each switch 4 5 and to the ground wire connected to the ground screw in the fan wiring box marked with a ground symbol Install the switches in the UL listed double gan...

Page 9: ...fter 10 20 Minutes Insufficient intake or exhaust Net Free Air Open more doors and windows or increase the amount of ventilation in the attic Unit is Noisy Moving the fan further into the attic will reduce the apparent noise Make sure all screws and bolts are tightened Verify Exhaust NFA Inadequate NFA will result in the unit working harder and making more noise Not Enough Airflow Verify NFA intak...

Page 10: ...cement and return to you of any part or component not covered by this warranty including parts or components damaged by you The company reserves the right to demand and receive written evidence of the date of purchase before undertaking its obligations under this warranty The right to demand and receive written evidence of date of purchase extends to all licensed dealers of Ventamatic Ltd products...

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