Ductwork Acoustical Treatment; Supply Air Connections - Bryant 310AAV Installation, start-up, operating, and service and Installation & Operating Instructions Manual

FURNACE
CASING
WIDTH
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
Downflow Applications on Noncombustible Flooring
14–3/16
Downflow applications on combustible flooring (KGASB
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box (KGASB subbase
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
Downflow Applications on Noncombustible Flooring
17–1/2
Downflow applications on combustible flooring (KGASB
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box (KGASB subbase
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
Downflow Applications on Noncombustible Flooring
21
Downflow applications on combustible flooring (KGASB
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box (KGASB subbase
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
Downflow Applications on Noncombustible Flooring
24-1/2
Downflow applications on Combustible flooring (KGASB
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box (KGASB subbase
CFM at the design external static pressure. The furnace airflow
rates are provided in Table 5-AIR DELIVERY-CFM (With Filter).
When a furnace is installed so that the supply ducts carry air
circulated by the furnace to areas outside the space containing the
furnace, the return air shall also be handled by a duct(s) sealed to
the furnace casing and terminating outside the space containing the
furnace.
Secure ductwork with proper fasteners for type of ductwork used.
Seal supply- and return-duct connections to furnace with code
approved tape or duct sealer.
NOTE: Flexible connections should be used between ductwork
and furnace to prevent transmission of vibration. Ductwork pass-
ing through unconditioned space should be insulated and sealed to
enhance system performance. When air conditioning is used, a
vapor barrier is recommended.
Maintain a 1-in. clearance from combustible materials to supply air
ductwork for a distance of 36 in. horizontally from the furnace. See
NFPA 90B or local code for further requirements.

Ductwork Acoustical Treatment

NOTE: Metal duct systems that do not have a 90 degree elbow
and 10 ft of main duct to the first branch take-off may require
internal acoustical lining. As an alternative, fibrous ductwork may
be used if constructed and installed in accordance with the latest
edition of SMACNA construction standard on fibrous glass ducts.
Table 4—Opening Dimensions (In.)
APPLICATION
(KGASB subbase not required)
subbase required)
not required)
(KGASB subbase not required)
subbase required)
not required)
(KGASB subbase not required)
subbase required)
not required)
(KGASB subbase not required)
subbase required)
not required)
PLENUM OPENING
A
12-11/16
12-9/16
11-13/16
12-5/16
16
15-7/8
15-1/8
15-1/2
19-1/2
19-3/8
18-5/8
19
23
22-7/8
22-1/8
22-1/2
Both acoustical lining and fibrous ductwork shall comply with
NFPA 90B as tested by UL Standard 181 for Class 1 Rigid air
ducts.

Supply Air Connections

For a furnace not equipped with a cooling coil, the outlet duct shall
be provided with a removable access panel. This opening shall be
accessible when the furnace is installed and shall be of such a size
that the heat exchanger can be viewed for possible openings using
light assistance or a probe can be inserted for sampling the air
stream. The cover attachment shall prevent leaks.
Upflow and Horizontal Furnaces
Connect supply-air duct to flange on furnace supply-air outlet.
Bend flange upward to 90° with wide duct pliers. (See Fig. 14.)
The supply-air duct must be connected to ONLY the furnace
supply-outlet-air duct flanges or air conditioning coil casing (when
used). DO NOT cut main furnace casing side to attach supply air
duct, humidifier, or other accessories. All accessories MUST be
connected external to furnace main casing.
→
NOTE: For horizontal applications, the top-most flange may be
bent past 90 degrees to allow the evaporator coil to hang on the
flange temporarily while the remaining attachment and sealing of
the coil are performed.
12
FLOOR OPENING
B C
21-5/8 13-5/16
19 13-3/16
19 13-7/16
19 13-5/16
21-5/8 16-5/8
19 16-1/2
19 16-3/4
19 16-1/2
21-5/8 20-1/8
19 20
19 20-1/4
19 20
21-1/8 23-5/8
19 23-1/2
19 23-3/4
19 23-1/2
D
22-1/4
19-5/8
20-5/8
20
22-1/4
19-5/8
20-5/8
20
22-1/4
19-5/8
20-5/8
20
22-1/4
19-5/8
20-5/8
20