AK9446BS User Manual

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MODELS MUA006A • MUA008A • MUA010A

Page 3

OUTSIDE AIR INTAKE LOCATION

Proper design and location of the outside air intake location is critical in

ensuring that the Damper can safely and reliably provide an opening for

fresh air to enter the home. The following requirements for the location

of the outside air intake must be met:

• Outsideairintakeislocatedaminimumof10’fromcombustionap-

pliance vents, chimneys, plumbing stacks, and bathroom or kitchen

exhaust vents. If local codes have more stringent separation re-

quirements, they shall apply.

• Outsideair intakeis placedhighenough abovegradetoprevent

blockage from snow or other debris such as leaves, and at a mini-

mum of 1’ above grade.

• Make-up air damper should not draw air from crawlspaces, ga-

rages, attics, adjacent dwelling units, or any enclosed part of the

building. The Damper should be installed to draw air directly from

outdoors.

OUTSIDE AIR INTAKE OPENING PROTECTION

Because the Damper, together with the end cap and outside air duct

which are installed with it, will allow outdoor air into the indoor environ-

ment, it is important to meet the following requirements:

• ModelAK00030(6”),AK00032(8”)andAK00052(10”)freshairinlet

wall caps include protective bird screens to keep out animals and

outside debris. Clean screens often and do not remove.

• Ifaprotectivebirdscreenotherthanthescreenprovidedisused,it

must cover the entire opening of the outside air duct. This screen

mustalsohaveopeningsofatleast¼”butnolargerthan½ ”.

• Theoutdoorairintakeopeningshouldmeetlocalcodeprovisions

for the protection of openings in exterior walls, including steps to

prevent moisture intrusion around the opening.

Note that the screen over the outside air opening is not a filter. It is

intended to prevent the intake of leaves, animals, or debris into the out-

side air duct. A downstream filter is necessary to remove pollen, dust,

and other airborne particles. Potential filter locations are shown below

in the Typical Installations section.

MINIMUM RETURN AIR TEMPERATURE REQUIREMENTS

HVAC equipment manufacturers may have minimum requirements for

the air temperature in the return air plenum. Introducing outdoor air to

the return side of the central duct system may impact this temperature.

The installer should adjust both the size of the outside air duct and the

location of its connection to the return side of the central duct system in

a manner so that minimum air temperature requirements are satisfied

under design conditions.

PLAN THE INSTALLATION

Planning the installation first requires selecting the most appropriate

installation approach. The chart below offers suggestions for the most

effective installation approach by considering a few important factors.

Further details on the two main types of installations are provided below.

Yes

• House has central duct work?

Yes

• Return-air side of duct work is

accessible -either the return-air trunk

or return- air plenum?

Damper connected to

return side of central

duct system

Damper ducted directly

to a ceiling, floor, or wall

WHAT IS INCLUDED IN THE

PACKAGE

-MotorizedDamper

- Transformer

-PressureSwitchKitwhichincludes:

- Pressure Switch

- Probe

-12”PVCtubing1/4”I.D.

- Gasket

-(6)SheetMetalScrews

TOOLS REQUIRED

-1/4”SocketDrive

- Flathead or Phillips Screw Driver

-3/8”DrillBit

- Duct Tape

- Low Voltage Wire (2 Conductor)

-(2)1/4”FemaleSpadeTerminals

- Wire Nuts

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User Manual - Page 3