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Installation in a garage, Plenums & air ducts, Unconditioned spaces – Reznor B6BM Unit Installation Manual User Manual

Page 5: Air filters, Acoustical duct work, Warning

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5

• 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 (

page 16

) for filter sizes

and 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