Field controls AB-2 User Manual

AIR BOOSTER

Model: AB-2

The Air Booster is designed to increase the flow of heated air or cooled air in
branch ducts of a heating and central air conditioning system. The Air Booster, can
also be used to improve the air flow of a gravity warm air furnace.

The Air Booster should be installed in branch ducts serving individual rooms, where
proper air flows can not be achieved.

Note: Installer must supply junction box.

INSTALLATION

Figure 1A

Figure 1B

Figure 2A

Figure 3A

The Air Booster is not designed for installation in
the main air supply ducts. Locating the Air
Booster near the outlet end of a problem branch
duct will provide the best performance.

The Air Booster is designed to operate in round
ducts 6-inches in diameter or larger and
rectangular ducts 6-inches wide by 6-inches
deep or larger.

CAUTION: Do not install the Air
Booster where the air temperature
within the duct exceed 180oF. The
Air Booster should not be installed
into vertical duct pipes.

1. Locate the Air Booster in the
duct pipe near the problem
area. Allow adequate space for
the removal of the unit for
servicing or annual inspection.

2. Attach the self-adhesive
template provided to the duct
surface. Make sure the arrows
on the template point in the
direction of the desired air flow.
After the template has been
secured to the duct pipe, cut a
slot in the pipe along the
indicated lines on the template.
Then remove the remainder of
the template from the pipe.

(See Figure 1A or 1B)

Figure 2B

3. Insert the Air Booster into the
slot, making sure the fan blade
points in the direction of the air

Figure 3B

flow. Position the Air Booster so
the fan blade does not rub
against the inside surface of the duct. Mark on the duct the location of the 6-hole positions in the base plate. Remove
the Air Booster and drill 1/8-inch diameter holes through the duct pipe where indicated.

4. Remove center knockout from the installer supplied outlet box bottom. (See Figure 2A) Before installing Air Booster
into the duct pipe, fasten the outlet box onto the base plate with the #10-32 UNF screws and nuts provided. (See
Figure 2B)

5. Insert the Air Booster into the cut slot of the duct pipe. Make sure the fan blade is pointed toward the outlet of the

duct. Secure the Air Booster onto the duct with the sheet metal screws provided. (See Figure 3A or 3B)

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UNIT WIRING INSTRUCTIONS

Figure 5

ELECTRICAL DATA

VOLTS AMPS HZ WATTS RPM THERMAL OR IMPEDANCE PROTECTION

120 VAC .60 60 35 3000 YES

A permanent wiring method must be used for power connection. It is recommended that a minimum size of 14 AWG wire
for electrical supply connections and wiring should be suitable for 90oC (194oF) temperature. The Air Booster should be
wired with an overcurrent protection device (fuse or circuit breaker) rated 15 amperes or less. Wiring method should be in
accordance with the National Electrical Code and any local code requirements.

CAUTION: Disconnect electrical power before wiring. Do not route electrical wiring along heated duct pipes.

WIRING METHOD NO. 1

Controlling the Air Booster through a standard on/off wall switch. (See Figure
4 for wiring diagram) This method allows for manual control of the Air Booster

unit in the area desired.

WIRING METHOD NO. 2

Controlling the Air Booster through a central heating/air conditioning forced air

system. (See Figure 5 for wiring diagram) This method allows for automatic

operation of the Air Booster unit. The Air Booster is wired in parallel with the
appliance blower motor. This operates the Air Booster whenever the

appliance blower operates.

Figure 4

CAUTION: Do not wire the Air Booster to an appliance blower

motor if:

The appliance motor is not rated for 120 volts AC single phase
and operating at 60 cycles.

The blower motor control is a variable speed tap type, solid
state speed control or any of the type of controls not designed
for dual motor control.

Consult appliance manual for this information.

NOTE: All wire splice connections should be made within an
electrical junction box.

MAINTENANCE

CAUTION: Disconnect electrical power supply before performing maintenance.

Periodic removal and cleaning of the Air Booster unit is recommended for forced central heating/air conditioning systems.
Annual removal and cleaning of the Air Booster unit is recommended for gravity warm air heating systems not equipped
with a return air filter.

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P/N 46422800 04/02