Bryant Deluxe 4-Way Multipoise Variable-Capacity Direct-Vent Condensing Gas 355MAV User Manual

Page 18

To remove bottom closure panel, perform following:

1. Tilt or raise furnace and remove 2 screws holding front

filler panel. (See Fig. 26.)

2. Rotate front filler panel downward to release holding tabs.

3. Remove bottom closure panel.

4. Reinstall front filler panel and screws.

Gas Piping

Gas piping must be installed in accordance with national and local
codes. Refer to NFGC in the U.S. Canadian installations must be
made in accordance with NSCNGPIC and all authorities having
jurisdiction. Gas supply line should be a separate line running
directly from meter to furnace, if possible. Refer to Table 3 for
recommended gas pipe sizing. Risers must be used to connect to
furnace and to meter. Support all gas piping with appropriate
straps, hangers, etc. Use a minimum of 1 hanger every 6 ft. Joint
compound (pipe dope) should be applied sparingly and only to
male threads of joints. Pipe dope must be resistant to propane gas.

CAUTION:

Connect gas pipe to furnace using a backup

wrench to avoid damaging gas controls.

WARNING:

Gas valve shutoff switch MUST be facing

forward or tilted upward. Failure to follow this warning
could result in property damage or death.

WARNING:

Never purge a gas line into a combustion

chamber. Never test for gas leaks with an open flame. Use
a commercially available soap solution made specifically
for the detection of leaks to check all connections. A
failure to follow this warning could result in fire, explo-
sion, personal injury, or death.

Fig. 24—Filter Installed for Side Inlet

A93045

FILTER
RETAINER

WASHABLE

FILTER

Fig. 25—Bottom Filter Arrangement

A00290

WASHABLE
FILTER

FILTER
SUPPORT

FILTER
RETAINER

⁄

-IN. WIDE

CASINGS ONLY:
INSTALL FIELD-SUPPLIED
FILTER FILLER STRIP
UNDER FILTER.

″

21-IN. WIDE
CASINGS ONLY:
SUPPORT RODS (3)
EXTEND 1/4" ON EACH
SIDE OF FILTER AND
REST ON CASING FLANGE

Fig. 26—Removing Bottom Closure Panel

A93047

BOTTOM
CLOSURE
PANEL

FRONT FILLER
PANEL

TABLE 3—MAXIMUM CAPACITY OF PIPE*

NOMINAL

IRON

PIPE
SIZE

(IN.)

INTERNAL

DIAMETER

(IN.)

LENGTH OF PIPE (FT)

1/2

0.622

175

120

3/4

0.824

360

250

200

170

151

1.049

680

465

375

320

285

1-1/4

1.380

1400

950

770

660

580

1-1/2

1.610

2100

1460

1180

990

900

* Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in. wc) or less, and a

pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas). Ref: Table
9-2 NFPA 54-2002.

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