Carrier Condensing gas furnace Operations Instructions download pdf (Page 26)

by power supply is sufficient to handle load imposed by this

equipment. Refer to rating plate or Table 6 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.

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

(33°C) rise.

The furnace must be electrically grounded in accordance with local

codes; or in the absence of local codes, with the National Electric

Code ANSI/NFPA 70 and/or the Canadian Electric Code, CSA

C22.1, Part I, if an external electrical source is utilized.

Use a separate branch electrical circuit containing a properly sized

fuse or circuit breaker for this furnace. See Table 6 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, furnace control status code indicator light will

flash rapidly and furnace will NOT operate.

FIRE HAZARD

Failure to follow this warning could result in intermittent

operation or performance satisfaction.

Do not connect aluminum wire between disconnect switch

and furnace. Use only copper wire. (See Fig. 33.)

ELECTRICAL SHOCK AND FIRE HAZARD

Failure to follow this warning coud result in electrical shock,

fire, or death.

The cabinet MUST have an uninterrupted or unbroken ground

according to NEC ANSI/NFPA 70-2002 and Canadian Elec-

trical 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.

Factory Installed J-Box Location

Install power entry hole filler plugs (factory-supplied in loose parts

bag) in unused power entry holes. (See Fig. 34.)

J-Box Relocation

1. Remove 2 screws holding auxiliary J-box. (See Fig. 35.)

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

provided.

3. Install power entry hole filler plugs (factory-supplied loose

parts bag) in unused power entry holes. (See Fig. 34.)

FIRE OR ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in intermittent unit

operation or performance satisfaction.

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.

CONTINUOUS FAN (CF) SETUP SWITCHES

The CF setup switches are used to select desired airflow when

thermostat is in continuous fan mode or to select low-cooling

airflow for two-speed cooling units. This setup feature allows

continuous fan airflow or low-cooling airflow to be adjusted. To

set desired continuous fan airflow or low-cooling airflow:

1. Remove main furnace door and blower access panel.

2. Locate CF setup switches on furnace control. (See Fig. 37.)

3. Determine desired continuous fan airflow or low-cooling

airflow.

4. Use Fig. 55 or wiring schematic to determine proper setup

position of CF switches. (See Fig. 36 and 56.)

5. Replace main furnace door and blower access panel.

A93033

Fig. 33—Disconnect Switch and Furnace

COPPER

WIRE ONLY

ELECTRIC

DISCONNECT

SWITCH

ALUMINUM

WIRE

Table 6—Electrical Data

UNIT

SIZE

VOLTS—

HERTZ—

PHASE

OPERATING

VOLTAGE RANGE

MAXIMUM

UNIT

AMPS

MINIMUM

WIRE

SIZE

MAXIMUM WIRE

LENGTH (FT)‡

MAXIMUM FUSE OR

CKT BKR AMPS**

Maximum* Minimum*

040-14 115—60—1 127 104 8.9 14 31 15

060-14 115—60—1 127 104 8.9 14 31 15

080-14 115—60—1 127 104 8.9 14 31 15

080-20 115—60—1 127 104 13.8 12 32 20

100-20 115—60—1 127 104 13.8 12 32 20

120-20 115—60—1 127 104 13.8 12 32 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.

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Carrier Condensing gas furnace Operations Instructions Page 26

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