Electrical Connections. Bryant 345MAV, Series F

WARNING: Gas valve ON and OFF switch MUST be facing forward or tilted upward. (See Fig. 46.) Failure to follow this warning could result in property damage or death.

CAUTION: If a flexible connector is required or allowed by authority having jurisdiction, black iron pipe shall be installed at furnace gas control valve and extend a minimum of 2 in. outside furnace casing. Failure to follow this caution will result in potential chaffing of flexible gas connection.

WARNING: Never purge a gas line into a combustion chamber. 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, explosion, 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 injury, or death.

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. 28.)

BOTTOM

CLOSURE

PANEL

FRONT FILLER

PANEL

Fig. 27—Removing Bottom Closure Panel

A93047

TABLE 3—MAXIMUM CAPACITY OF PIPE

(CU FT PER HR)*

NOMINAL

IRON

PIPE

SIZE

(IN.)

1/2

3/4

1

1-1/4

1-1/2

INTERNAL

DIAMETER

(IN.)

0.622

0.824

1.049

1.380

1.610

10

175

360

680

LENGTH OF PIPE (FT)

20

120

250

465

1400 950

30

97

200

375

40

82

170

320

50

73

151

285

770 660 580

2100 1460 1180 990 900

* 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.

—20—

If local codes allow the use of a flexible gas appliance connector, always use a new listed connector. Do not use a connector which has previously served another gas appliance.

WARNING:

FIRE OR EXPLOSION HAZARD

Failure to follow the safety warnings exactly could result in serious injury, death or property damage.

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 fire or explosion may result causing property damege, personal injury or loss of life.

An accessible manual shutoff valve MUST be installed external to furnace casing and within 6 ft of furnace. A 1/8-in. NPT plugged tapping, accessible for test gauge connection, MUST be installed immediately upstream of gas supply connection to furnace and downstream of manual shutoff valve.

NOTE: The gas valve inlet pressure tap connection is suitable to use as test gauge connection providing test pressure DOES NOT exceed maximum 0.5 psig (14-in. wc) stated on gas valve. (See

Fig. 46.)

If pressure exceeds 0.5 psig (14-in. wc), gas supply pipe must be disconnected from furnace and capped before pressure test. If test pressure is equal to or less than 0.5 psig (14-in. wc), turn off electric shutoff switch located on furnace gas valve and accessible manual shutoff valve before test.

The gas supply pressure shall be within the maximum and minimum inlet pressures marked on the rating plate with the furnace burners ON and OFF.

V.

ELECTRICAL CONNECTIONS

See Fig. 30 for field wiring diagram showing typical field 115-v and 24-v wiring. Check all factory and field electrical connections for tightness.

Field-supplied wiring shall conform with the limitations of 63°F

(35°C) rise.

GAS

SUPPLY

MANUAL

SHUTOFF

VALVE

(REQUIRED)

SEDIMENT

TRAP

UNION

Fig. 28—Typical Gas Pipe Arrangement

A93324