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furnace 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 B6BW 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
This unit is designed only for use with a supply and return
duct. 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 on the web.
WARNING:
All return ducts must be secured to the air handler
with sheet metal screws. 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.
• Plenums and air ducts must be installed in accordance
with the Standard for the Installation of Air Conditioning
and Ventilating Systems (NFPA No. 90A) or the
Standard for the Installation of Warm Air Heating and
Air Conditioning Systems (NFPA No. 90B).
• Design the duct work according to methods described
by the Air Conditioning Contractors of America
(ACCA).
• The return air duct must have the same free area as
the opening provided on the blower coil unit.
• The ducts should be appropriately sized to the capacity
of the air handler to ensure its proper airflow rating.
• 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.
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.
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.
Filter Requirements
B6BW Air Handlers are supplied with a single air filter
when shipped from the factory. Accessing the filter does
not require tools and can be removed from the front of the
unit. See Unit Maintenance on
for filter sizes
and installation information.
WARNING:
Never operate the furnace without a filter in place.
Dust and lint can build up on internal components,
resulting in loss of efficiency, equipment damage,
and possible fire.
