Bryant Condensing Gas 355CAV - Manual (Page 19)

19
Table 1 – Opening Dimensions (in./mm)
FURNACE
CASING
WIDTH
APPLICATION
(APPROVED FACTORY SUPPLIED CASED COILS AND COIL BOX:
CD5, CKR, CAPVP, CARVP, CAPMP, CARMP, CNPVP, CNRVP, AND
KCAKC)
PLENUM OPENING FLOOR OPENING
A B C D
17 ½ in.
445 mm
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
16 in./
406 mm
24--1/8 in./
613 mm
16--5/8 in./
422 mm
24--3/4 in./
629 mm
Downflow Applications on Noncombustible Flooring (KGASB
subbase not required)
15--7/8 in./
403 mm
19 in./
483 mm
16--1/2 in./
419 mm
19--5/8 in./
498 mm
Downflow applications on combustible flooring (KGASB sub-
base required)
15--1/8 in./
384 mm
19 in./
483 mm
16--3/4 in./
425 mm
20--3/8 in./
518 mm
Downflow Applications on Combustible Flooring with Factory
supplied cased coil or Factory supplied coil box (KGASB
subbase not required)
15--1/2 in./
394 mm
19 in./
483 mm
16--1/2 in./
419 mm
20 in./
508 mm
21 in./
533 mm
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
19--1/2 in./
495 mm
24--1/8 in./
613 mm
20--1/8 in./
511 mm
24--3/4 in./
629 mm
Downflow Applications on Noncombustible Flooring (KGASB
subbase not required)
19--3/8 in./
492 mm
19 in./
483 mm
20 in./
508 mm
19--5/8 in./
498 mm
Downflow applications on combustible flooring (KGASB sub-
base required)
18--5/8 in.
473 mm
19 in./
483 mm
20--1/4 in./
514 mm
20--3/8 in./
518 mm
Downflow Applications on Combustible Flooring with Factory
supplied cased coil or Factory supplied coil box (KGASB
subbase not required)
19 in./
483 mm
19 in./
483 mm
20 in./
508 mm
20 in./
508 mm
24--1/2 in./
622 mm
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
23 in./
584 mm
24--1/8 in./
613 mm
23--5/8 in./
600 mm
24--3/4 in./
629 mm
Downflow Applications on Noncombustible Flooring (KGASB
subbase not required)
22--7/8 in./
581 mm
19 in./
483 mm
23--1/2 in./
597 mm
19--5/8 in.
498 mm
Downflow applications on Combustible flooring (KGASB
subbase required)
22--1/8 in./
562 mm
19 in./
483 mm
23--3/4 in./
603 mm
20--3/8 in./
518 mm
Downflow Applications on Combustible Flooring with Factory
supplied cased coil or Factory supplied coil box (KGASB
subbase not required)
22--1/2 in./
572 mm
19 in./
483 mm
23--1/2 in./
597 mm
20 in./
508 mm
AIR DUCTS
General Requirements
The duct system should be designed and sized according to
accepted national standards such as those published by: Air
Conditioning Contractors Association (ACCA), Sheet Metal and
Air Conditioning Contractors National Association (SMACNA)
or American Society of Heating, Refrigerating and Air
Conditioning Engineers (ASHRAE) or consult The Air Systems
Design Guidelines reference tables available from your local
distributor. The duct system should be sized to handle the
required system design CFM at the design static pressure.
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 must 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.
Flexible connections should be used between ductwork and
furnace to prevent transmission of vibration. Ductwork passing
through unconditioned space should be insulated to enhance
system performance. When air conditioning is used, a vapor
barrier is recommended.
Maintain a 1--in. (25.4mm) clearance from combustible materials
to supply air ductwork for a distance of 36 in. (914.4mm)
horizontally from the furnace. See NFPA 90B or local code for
further requirements.
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.
Ductwork Acoustical Treatment
Metal duct systems that do not have a 90 degree elbow and 10 ft
(3 m) 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. 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
Upflow Furnaces
Connect supply--air duct to 3/4--in. (19.0mm)flange on furnace
supply--air outlet. The supply--air duct attachment must ONLY be
connected to furnace supply--/outlet--air duct flanges or air
conditioning coil casing (when used). DO NOT cut main furnace
casing to attach supply side air duct, humidifier, or other
accessories. All accessories MUST be connected external to
furnace main casing.
Downflow Furnaces
Connect supply--air duct to supply--air opening on furnace. The
supply--air duct attachment must ONLY be connected to furnace
supply/outlet or air conditioning coil casing (when used) when
installed on non--combustible material When installed on
combustible material, supply air duct attachment must ONLY be
connected to an accessory subbase or factory approved air
conditioning coil casing. DO NOT cut main furnace casing to
attach supply side air duct, humidifier, or other accessories. All
accessories MUST be connected external to furnace main casing.
Supply air opening duct flanges must be modified per Fig. 22.
Horizontal Furnaces
Connect supply--air duct to supply--air opening on furnace. The
supply--air duct attachment must ONLY be connected to furnace
supply/outlet or air conditioning coil casing (when used). DO
NOT cut main furnace casing to attach supply side air duct,
355C
A
V