Installation In A Garage; Plenums & Air Ducts; Unconditioned Spaces; Air Filters - Maytag B6BM series Installation Instructions Manual

• Before occupying the structure: The filter must be replaced
or cleaned, the duct work must be inspected and cleaned
of any construction debris, and the air handler must be
cleaned and/or repaired if found to be dirty, damaged, or
malfunctioning in any way by a qualified HVAC technician.
The air handler shall be inspected and approved by
applicable local authority even if this requires redundant
inspections.
• The serial number for the air handler used during
construction must be submitted in writing (fax and email
also acceptable). This information will be used to track the
long-term affects of air handler usage during construction.
Proof of this submittal shall be available for the final
inspection of the air handler prior to occupancy.

Installation in a Garage

wARNING:
Do not place combustible materials on or against
the cabinet. Do not place flammable materials,
(gasoline, paint thinners, etc.) or any other
flammable vapors and liquids, in the vicinity of
the air handler.
The B6 Series air handler may be installed in a residential
garage with the provision that the unit must be located or
protected to prevent physical damage by vehicles.
Plenums & Air Ducts
• Plenums and air ducts should be installed in accordance with
the standards of the National Fire Protection Association
Standard for Installation of Air Conditioning Systems
(NFPA 90A), Standard for Installation of Residence Type
Warm Air Heating and Air Conditioning Systems (NFPA
90B), and all applicable local codes. NFPA publications
are available by writing to: National Fire Protection
Association, Batterymarch Park, Quincy, ME 02269 or visit
www.NFPA.org online.
wARNING:
All return ducts must be secured to the air handler
using appropriate methods. All return ducts must
be adequately sealed. when return air is provided
through the bottom of the unit, the joint between
the air handler and the return air plenum must
be air tight.
Return air and circulating air ducts must not be
connected to any other heat producing device
such as a fireplace insert, stove, etc. this may
result in fire, explosion, carbon monoxide
poisoning, personal injury, or property damage.
• Design the duct work according to methods described by
the Air Conditioning Contractors of America (ACCA).
• This unit is designed only for use with a return and supply
duct. The return air duct must have the same free area as
the opening provided on the air handler. The ducts should
be appropriately sized to the capacity of the air handler to
ensure its proper airflow rating.
• Use transition fittings if the supply and/or return air openings
of the unit do not match the duct openings. These transitions
should be dimensioned in accordance with standard
practice as specified in the ASHRAE recommendations
for duct transitions.
• Flexible connectors may be used between the unit and the
ductwork to prevent transmission of vibration from the unit
to the structure. If electric heater kits are installed, heat
resistant material must be used for the flexible connector
at the supply air end of the unit.
• It is good practice to seal all connections and joints with
industrial grade sealing tape or liquid sealant. Requirements
for sealing ducts vary from region to region. Consult with
local codes for requirements specific to your area.

Unconditioned Spaces

All duct work passing through unconditioned space must
be properly insulated to minimize duct losses and prevent
condensation. Use insulation with an outer vapor barrier.
Refer to local codes for insulation material requirements.

Air Filters

B6 Series Air Handlers are not supplied with an air filter
when shipped from the factory. The installer must provide
a high velocity filter that is appropriately sized to the return
air duct opening or filter rack located in the bottom of the
unit. Accessing the filter does not require tools and can be
removed from the front of the unit by removing the filter
door. See Unit Maintenance
installation information.
wARNING:
Never operate the air handler without a filter
or with doors removed. Dust and lint can build
up on internal components, resulting in loss of
efficiency, equipment damage, and possible fire.

Acoustical Duct Work

• Certain installations may require the use of acoustical lining
inside the supply duct work. Acoustical insulation must be
in accordance with the current revision of the Sheet Metal
and Air Conditioning Contractors National Association
(SMACNA) application standard for duct liners. Duct lining
must be UL classified batts or blankets with a fire hazard
classification of FHC-25/50 or less.
• Fiber duct work may be used in place of internal duct liners
if the fiber duct work is in accordance with the current
revision of the SMACNA construction standard on fibrous
glass ducts. Fibrous duct work and internal acoustical
lining must be NFPA Class 1 air ducts when tested per
UL Standard 181 for Class 1 ducts.
• Damping ducts, flexible vibration isolators, or pleated
media-style filters on the return air inlet of the air handler
may be used to reduce the transmission of equipment
noise eminating from the air handler. These treatments
can produce a quieter installation, particularly in the
heated space. However, they can increase the pressure
drop in the duct system. Care must be taken to maintain
the proper maximum pressure rise across the air handler,
temperature rise and flow rate. This may mean increasing
the duct size and/or reducing the blower speed. These
treatments must be constructed and installed in accordance
with NFPA and SMACNA construction standards. Consult
with local codes for special requirements. For best sound
performance, be sure to install all the needed gaskets and
grommets around penetrations into the air handler, such
as for electrical wiring.
(page 15) for filter sizes and
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