Air King AILT4 User Manual

IMPORTANT INSTRUCTIONS -

OPERATING MANUAL

Models: AIDB4Y, AILT4

Dryer Booster Fan

READ AND SAVE THESE INSTRUCTIONS

READ CAREFULLY BEFORE ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE OR MAINTAIN THE PRODUCT DESCRIBED. PROTECT

WARNING: DO NOT CONNECT POWER SUPPLY UNTIL FAN

IS COMPLETELY INSTALLED. MAKE SURE ELECTRICAL SERVICE
TO THE FAN IS LOCKED IN OFF POSITION.

WARNING: MODEL AIDB4Y DRYER BOOSTER FAN IS NOT

EXPLOSION PROOF. DO NOT USE IF A POTENTIALLY EXPLOSIVE
SITUATION MAY EXIST.

1. Read all instructions before installing or using fan.

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

YOURSELF AND OTHERS BY OBSERVING ALL SAFETY INFORMATION. FAILURE TO COMPLY WITH

INSTRUCTIONS COULD RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE!

RETAIN INSTRUCTIONS FOR FUTURE REFERENCE.

GENERAL SAFETY INFORMATION

When using electrical appliances, basic precautions

should always be followed to reduce the risk of fire,

electric shock and injury to person, including the following:

CAUTION: FOR GENERAL VENTILATING USE ONLY. DO

NOT USE TO EXHAUST HAZARDOUS OR EXPLOSIVE MATERIALS
AND VAPORS.

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

7. Ducted fans must always be vented to the outdoors.

8. To avoid motor bearing damage and noisy and/or unbalanced
impellers, keep drywall spray, construction dust, etc. off
power unit.

3. Before servicing or cleaning the 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.

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

5. 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.

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9. This unit has rotating parts and safety precautions should be
exercised during installation, operation and maintenance.

10. Guards must be installed when fan is within reach of personnel
or within seven (7) feet of working level or when deemed
advisable for safety.

11. DO NOT insert or allow fingers or foreign objects to enter the
motor.

12. DO NOT use with heated air in excess of 140°F (60°C).

1 of 8

INSTALLATION INSTRUCTIONS
CAUTION:

PANEL BEFORE STARTING INSTALLATION.

MAKE SURE POWER IS SWITCHED OFF AT SERVICE

SECTION 1

Preparing for Installation

1. Fan and Switch Mounting: The recommended location of the
booster fan is a minimum of 15 linear (not equivalent) feet of duct
from the dryer outlet. If the fan is mounted closer than the
recommended 15 feet, it may develop enough pressure to lift wet
lint into the fan impeller resulting in excessive lint loading in the
fan. The best location for the fan to be mounted is as close as
possible to the termination of the duct work. (Exception: If a
secondary lint filter is installed between the dryer and the booster
fan, the booster fan may be mounted within the minimum distance
otherwise recommended (Figure 1). A mounting bracket attached
to a rafter or joist should be used to stabilize the fan. Although not
recommended, a vertical rigid duct may support the fan if the duct
is securely stabilized. (Consult local codes prior to supporting the
fan in the duct alone.) Duct work should be attached to the inlet
and outlet of the fan by means of vibration isolation clamps (not
included) or ducting tape. The duct connection should be properly
sealed to prevent leakage and loss of fan performance. Flex duct
connections between the dryer duct connection and exhaust duct
should be stretched as smooth as possible.

Recommended

Fan Location

Alternative Fan

Location

Secondary Lint

Trap

2. The electricity to the booster fan is connected in series through a
normally open terminal on the switch. A pressure tap is connected
to a fitting on the side of the switch. When the dryer begins operation,
positive pressure in the duct causes the switch diaphragm to
expand, closing the circuit to the booster fan. An integral delay­on-break timer in the switch will cycle the fan on for intervals of
10 minutes. This will continue until the dryer has stopped and the
timer delay period has lapsed. Drying cycles, the booster fan, the
delay timer and the pressure switch are not adversely affected by
the starting/stopping intervals.

SECTION 3

Installation

1. Selecting Fan Location: Fan must be mounted a minimum of 15 feet
from the dryer outlet. If the fan is mounted closer than the
recommended 15 feet, it may develop enough pressure to lift wet
lint into the fan impeller resulting in excessive lint loading in the
fan. (Exception: If a secondary lint filter is installed between the
dryer and the booster fan, the booster fan may be mounted within
the minimum distance otherwise recommended (Figure 1). The best
location for the fan to be mounted, in any application, is as close
as possible to the termination of the duct work. In order to perform
recommended maintenance, fan location should allow sufficient
access for service. Refer to dimensional drawings shown above.

2. Mounting the Bracket: Using the wood screws provided, attach the
mounting bracket to a support beam at the selected location. Bracket
is provided with grommets in order to isolate any vibration and
prevent the transmission of sound through the structure. Be careful
not to overtighten. Fan mounting can be in any angle (Figure 2),
however, vertical mounting is recommended to reduce condensation
buildup in the fan. If a horizontal installation is necessary and
condensation buildup may pose a problem, wrap insulation around
the fan to minimize buildup.

Vertical Mounting

Horizontal Mounting

Bracket

Bracket

or

Stud

Joist

Figure 1

2. Calculating Duct Run: To calculate the length of your planned duct
run, measure from the dryer to external venting point in roof or
wall. For each bend or elbow add 5-7 feet to your total duct run
calculations. This booster fan can be used on runs up to 108 feet.

Figure 2

3. Mounting the Fan: For proper operation, the switch diaphragm
must be positioned vertically (Figure 3). Wiring box should be
positioned for easy access. Attach fan to the mounting bracket
with the self tapping screws provided. Care should be taken not to
strip the plastic housing. Although screw pilot holes are not required,
3|32" (or smaller) pilot holes are recommended (Figure 4).

SECTION 2

Understanding the Pressure Sensor Switch

1. This unit is equipped with a pressure switch. This is a positive
pressure sensing switch which recognizes dryer operation and
activates the booster fan from an independent electrical circuit.
This eliminates connections through the dryer circuit which may
void the manufacturers’ warranty as well as manual systems which
require the attention of the operator or costly current/temperature
sensing systems.

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Correct Positions

Incorrect Positions

Figure 3

2. Bring incoming electrical service through the romex connector
and the fan knockout. Be sure to place the connector nut over the
wiring coming into the terminal box. There are three open ports
on the terminal strip. Using a small regular screwdriver, tighten
the Neutral (white) wire of the incoming supply under the open
terminal labeled "N". Tighten the Line (black) wire of the incoming
supply under the open terminal labeled "L". Tighten the Ground
(green) wire of the incoming supply under the open terminal labeled

(Figure 6). For reference, a wiring diagram is included on the

" "
inside of the terminal box lid.

Supply from house

Ground

Green

Fan

Stud

Figure 4

NOTE: Steps 2 and 3 may be reversed.

Bracket

Screws

SECTION 4

Electrical Connections

CAUTION: MAKE SURE POWER IS SWITCHED OFF AT SERVICE

PANEL BEFORE STARTING INSTALLATION.

CAUTION: ALL ELECTRICAL CONNECTIONS MUST BE MADE

IN ACCORDANCE WITH LOCAL CODES, ORDINANCES, OR NATIONAL
ELECTRICAL CODE. IF YOU ARE UNFAMILIAR WITH METHODS OF
INSTALLING ELECTRICAL WIRING, SECURE THE SERVICES OF A
QUALIFIED ELECTRICIAN.

NOTE: The fan motor, capacitor and pressure switch connections are

pre-wired from the factory.

1. Remove the screws securing the terminal box cover plate located
on the side of the fan. All fan motor connections are prewired to
an electrical terminal strip. A 3|8" romex type cable restraint
connector will be needed to secure the wiring through the knockout
provided on the side of the terminal box (Figure 5).

Black

Black

White

Capacitor

L

N

Black

White

Blue

Brown

Red

Figure 6

3. Secure the incoming supply with the romex connector and replace
the fan terminal box cover.

4. Restore power to the unit and test the installation.

SECTION 5

Finishing the Installation

1. Included with the unit is an identifying label that must be placed
above the dryer. This label serves as a reminder that there is a
booster fan installed and that periodic cleaning must take place.

SECTION 6

Use and Care

CAUTION: MAKE SURE POWER IS SWITCHED OFF AT SERVICE

PANEL BEFORE SERVICING THE UNIT.

1.

Fan impeller may accumulate lint. Periodic inspection, based upon
dryer usage, should be performed to ensure that the fan impeller
is not obstructed or loaded with lint. Under normal conditions, fan
should be inspected a minimum of every Six (6) Months.To inspect
and clean the impeller:

a. Disconnect the incoming power supply at the source.
b. Remove the duct from the fan inlet and remove any lint buildup

on the impeller.

c. Reconnect the duct to the fan. Turn power supply on.

NOTE: Excessive booster fan noise or vibration may be an indication
of lint buildup on the impeller.

Screws

Figure 5

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Terminal Box

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2. The fan’s bearings are sealed and provided with an internal
lubricating material, no additional lubrication is necessary.