Bryant 345MAV Bedienungsanleitung PDF herunterladen (Seite 21)

WARNING: Blower access door switch opens 115-v

power to control center. No component operation can

occur. Do not bypass or close switch with panel removed.

Failure to follow this warning could result in personal

injury or death.

CAUTION: Furnace control must be grounded for

proper operation or control will lock out. Control is

grounded through green/yellow wire routed to gas valve

and burner box screw. Failure to follow this caution will

result in intermittent unit operation.

A. 115-v Wiring

Before proceeding with electrical connections, make certain that

voltage, frequency, and phase correspond to that specified on

furnace rating plate. Also, check to be sure that service provided

by power supply is sufficient to handle load imposed by this

equipment. Refer to rating plate or Table 4 for equipment electrical

specifications.

Make all electrical connections in accordance with National

Electrical Code (NEC) ANSI/NFPA 70-2002 and any local codes

or ordinances that might apply. For Canadian installations, all

electrical connections must be made in accordance with Canadian

Electrical Code CSA C22.1 or authorities having jurisdiction.

Use a separate, fused branch electrical circuit containing a properly

sized fuse or circuit breaker for this furnace. See Table 4 for wire

size and fuse specifications. A disconnecting means must be

located within sight from and readily accessible to furnace.

NOTE: Proper polarity must be maintained for 115-v wiring. If

polarity is incorrect, control center fault code indicator light will

flash rapidly and furnace will NOT operate.

WARNING: The cabinet MUST have an uninterrupted

or unbroken ground according to NEC ANSI/NFPA

70-2002 and Canadian Electrical Code CSA C22.1 or

local codes to minimize personal injury if an electrical

fault should occur. This may consist of electrical wire or

conduit approved for electrical ground when installed in

accordance with existing electrical codes. Do not use gas

piping as an electrical ground. Failure to follow this

warning could result in electrical shock, fire, or death.

J-BOX RELOCATION

1. Remove 2 screws holding auxiliary J-box. (See Fig. 31.)

2. Rotate J-box 180° and attach box to right side, using holes

provided.

CAUTION: If manual disconnect switch is to be

mounted on furnace, select a location where a drill or

fastener will not contact electrical or gas components.

Failure to follow this caution will result in intermittent

unit operation or performance satisfaction.

B. 24-v Wiring

Make field 24-v thermostat connections at 24-v terminal block on

furnace control. For proper cooling operation, Y wire from

thermostat MUST be connected to Y terminal on furnace control,

as shown in Fig. 30. The 24-v terminal block is marked for easy

connection of field wiring. (See Fig. 32.) The 24-v circuit contains

a 3-amp, automotive-type fuse located on furnace control. (See

Fig. 33.) Any electrical shorts of 24-v wiring during installation,

service, or maintenance may cause fuse to blow. If fuse replace-

ment is required, use only a fuse of identical size (3 amp) and type.

The control will flash code 24 when fuse needs replacement.

NOTE: Use AWG No. 18 color-coded copper thermostat wire for

lengths up to 100 ft. For wire lengths over 100 ft, use AWG No.

16 wire.

TABLE 4—ELECTRICAL DATA

UNIT

SIZE

VOLTS—

HERTZ—

PHASE

OPERATING

VOLTAGE RANGE

MAX

UNIT

AMPS

UNIT

AMPACITY†

MIN

WIRE

SIZE

MAX WIRE

LENGTH (FT)‡

MAX FUSE OR

CKT BKR AMPS**

Max* Min*

024040 115—60—1 127 104 6.1 8.4 14 44 15

036040 115—60—1 127 104 7.3 10.0 14 37 15

024060 115—60—1 127 104 6.1 8.4 14 44 15

036060 115—60—1 127 104 7.1 9.8 14 38 15

048060 115—60—1 127 104 9.5 12.8 14 29 15

036080 115—60—1 127 104 7.6 10.4 14 36 15

048080 115—60—1 127 104 10.0 13.4 14 28 15

060080 115—60—1 127 104 14.1 18.4 12 31 20

048100 115—60—1 127 104 10.2 13.5 14 27 15

060100 115—60—1 127 104 14.8 19.3 12 30 20

060120 115—60—1 127 104 14.6 19.1 12 30 20

* Permissible limits of voltage range at which unit will operate satisfactorily.

† Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier, etc.) full load

amps.

‡ Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.

** Time-delay type is recommended.

Fig. 29—Disconnect Switch and Furnace

CAUTION: Do not connect aluminum wire between

disconnect switch and furnace. Use only copper wire.

(See Fig. 29.) Failure to follow this caution will result in

intermittent unit operation or performance satisfaction.

A93033

COPPER

WIRE ONLY

ELECTRIC

DISCONNECT

SWITCH

ALUMINUM

WIRE

—21—

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 43 44

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