Bryant 340MAV VI. Bottom Closure Panel, VII. GAS Piping, Maximum Capacity of Pipe, Casings only

171⁄2-IN. WIDE

CASINGS ONLY:

INSTALL FIELD-SUPPLIED FILTER FILLER STRIP UNDER FILTER.

3″

24 1/2″

1″

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

BOTTOM

CLOSURE

PANEL

FRONT FILLER

PANEL

WASHABLE FILTER

A93047

Fig. 25—Removing Bottom Closure Panel

→CAUTION: Connect gas pipe to furnace using a backup wrench to avoid damaging gas controls. Failure to follow this caution will result in intermittent unit operation or performance satisfaction.

WARNING: Gas valve shutoff switch MUST be facing forward or tilted upward. Failure to follow this warning could result in property damage or death.

FILTER

FILTER RETAINER

SUPPORT

Fig. 24—Bottom Filter Arrangement

VI. BOTTOM CLOSURE PANEL

A00290

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.

WARNING: Use proper length of pipe to avoid stress on gas control manifold. Failure to follow this warning could result in a gas leak resulting in fire, explosion, personal

These furnaces are shipped with bottom enclosure panel installed in bottom return-air opening. This panel MUST be in place when side return air is used.

To remove bottom closure panel, perform following:

1.Tilt or raise furnace and remove 2 screws holding front filler panel. (See Fig. 25.)

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

3.Remove bottom closure panel.

4.Reinstall front filler panel and screws.

VII. GAS PIPING

Gas piping must be installed in accordance with national and local codes. Refer to current edition of NFGC in the United States. Canadian installations must be made in accordance with NSCNG- PIC 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.

injury, or death.

TABLE 3—MAXIMUM CAPACITY OF PIPE*

NOMINAL			LENGTH OF PIPE (FT)
IRON	INTERNAL
PIPE	DIAMETER
SIZE	(IN.)	10		20	30	40	50
(IN.)
1/2	0.622	175		120	97	82	73
3/4	0.824	360		250	200	170	151
1	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 12.2 NFPA 54-2002.

Install a sediment trap in riser leading to furnace. Trap can be installed by connecting a tee to riser leading to furnace so straight-through section of tee is vertical. Then connect a capped nipple into lower end of tee. Capped nipple should extend below level of gas controls. Place a ground joint union between gas control manifold and manual gas shutoff valve. (See Fig. 26.)

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