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1
WARNING
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS,
OBSERVE THE FOLLOWING:
1. Installation work and electrical wiring must be done by a qualified
person(s) in accordance with all applicable codes and standards, including fire-
rated construction codes and standards.
2. Validated performance testing certified for use with BEST, Broan, and Broan Elite
range hoods.
3. This unit is not designed to provide combustion air for fuel-burning appliances.
4. Do not connect the unit directly to a combustion appliance of any type.
5. Sufficient air is needed for proper combustion and exhausting of gases through
the flue (chimney) of fuel burning equipment to prevent backdrafting. 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.
6. 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.
7. When performing installation, servicing or cleaning the unit, it is recommended to
wear safety glasses and gloves.
8. During extreme weather events including snow storms, ensure that the intake
area for the outside air duct is not blocked and able to provide a clear pathway for
outside air to enter the system.
9. When cutting or drilling into wall or ceiling, do not damage electrical wiring or other
hidden utilities.
10. When notching or drilling into framing including floor supports, rim joists, and wall
studs, comply with code and manufacturer limitations on allowable modifications
to these structural members.
11. This unit is intended to be installed within the home in a location protected from
moisture.
12. This unit must be in an accessible location which allows for inspection of the unit.
13. Use this unit only in the manner intended by the manufacturer. If you have
questions, contact the manufacturer at the address or telephone number listed in
this document.
14. When federal, provincial or state legislation comprises more restrictive installation
and/or certification requirements, the aforementioned requirements prevail on
those of this document and the installer agrees to conform to these at his own
expense.
AUTOMATIC MAKE-UP AIR DAMPER WITH
TRANSFORMER & PRESSURE SWITCH
READ AND SAVE THESE INSTRUCTIONS
!
FOR RESIDENTIAL USE ONLY
!
CAUTION
!
1. Do not locate outside air inlet near hazardous materials or explosives.
2. Unit shall not be installed to introduce air from crawlspaces, garages, attics,
adjacent dwelling units, or other locations within the building shell. Unit shall be
installed to introduce air directly from outdoors.
3. Do not run the outside air duct directly above or closer than 2 ft to any furnace or
its supply plenum, boiler, or other heat producing appliance.
4. Any ductwork used in conjunction with the Damper must be installed in compliance
with all local and national codes that are applicable.
5. Do not operate the Damper for fresh air introduction until all system filters,
including the central duct system filter, have been installed per the system design.
6. Please read the unit specification label on the product for further information and
requirements.
7. The Damper’s outdoor air intake, ducting, and any filters should be inspected and
maintained on a regular basis.
8. Insulate the duct and damper to prevent build-up of condensation in cold weather
climates. Vapor barriers on both sides of insulation are recommended.
PLAN THE INSTALLATION
Planning the installation first requires selecting the most appropriate installation ap-
proach. 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 instal-
lations 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
No
No
Damper ducted directly
to a ceiling, floor, or wall
register
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 appliance vents,
chimneys, plumbing stacks, and bathroom or kitchen exhaust vents. If local codes
have more stringent separation requirements, 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 minimum of 1’ above grade.
• Make-up air damper should not draw air from crawlspaces, garages, attics, adja-
cent 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 environment, it is important to meet the
following requirements:
• Model 641FA (6”) and 643FA (8”) 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 outside 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 tempera-
ture 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.
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
MODELS
MD6TU • MD8TU • MD10TU
Register this product at www.broan.com/register. For Warranty Statement, or to order
Service Parts: go to www.broan.com and type the Model in the “Model Search” field
at the top of the page.
Broan, 926 W. State Street, Hartford, WI 53027 800-637-1453
Produktspecifikationer
| Varumärke: | Best |
| Kategori: | Inte kategoriserad |
| Modell: | MD8TU |
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