Carrier 48XL Install Electrical Connections, Fire or Explosion Hazard, HIGH-VOLTAGE Connections

IN

TEE

_-_ NIPPLE

CAP

C99020

Fig. 10 - Sediment Trap

7.Pressure test all gas piping in accordance with local and

national plumbing and gas codes before connecting piping to unit.

NOTE:

Pressure

test

the

gas

supply

system

after

the gas

supply

piping

is connected

to

the

gas

valve.

The

supply

piping

must

be

disconnected

from

the

gas

valve during

the

testing

of

the

piping

systems

when

test

pressure

is in

excess

of 0.5

psig. Pressure

test

the

gas supply piping system at pressures equal to or less than 0.5 psig.

The unit heating section must be isolated from the gas piping

system by closing the external main manual shutoff valve and

slightly opening the ground-joint union.

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in fire, explosion, personal injury, death and/or property damage.

•Connect gas pipe to unit using a backup wrench to avoid damaging gas controls.

•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.

•Use proper length of pipe to avoid stress on gas control manifold.

•If a flexible connector is required or allowed by authority having jurisdiction, black iron pipe shall be installed at furnace gas valve and extend a minimum of 2 in. (51 mm) outside furnace casing.

•If codes allow a flexible connector, always use a new connector. Do not use a connector which has previously serviced another gas appliance.

8.Check for gas leaks at the field-installed and

factory-installed gas lines after all piping connections have

been completed. Use a commercially available soap solution

made specifically for the detection of leaks (or method specified by local codes and/or regulations).

Install Electrical Connections

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal iniury or death.

The unit cabinet must have an uninterrupted, unbroken electrical ground. This ground may consist of an electrical

wire connected to the unit ground screw in the control

compartment, or conduit approved for electrical ground

when installed in accordance with NEC, NFPA 70 National

Fire Protection Association (latest edition) (in Canada,

Canadian Electrical Code CSA C22.1) and local electrical codes.

HIGH-VOLTAGE CONNECTIONS

The unit must have a separate electrical service with a field-supplied, waterproof disconnect switch mounted at, or within sight from, the unit. Refer to the unit rating plate, NEC and local codes for maximum fuse/circuit breaker size and minimum circuit amps (ampacity) for wire sizing.

The field-supplied disconnect may be mounted on the unit over the high-voltage inlet hole (See Fig. 5 and 6).

Operation of unit on improper line voltage constitutes abuse and may cause unit damage that could affect warranty.

UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in damage to the unit being installed.

1.Make all electrical connections in accordance with NEC NFPA 70 (latest edition) and local electrical codes

governing such wiring. In Canada, all electrical connections must be in accordance with CSA standard

C22.1 Canadian Electrical Code Part 1 and applicable local codes. Refer to unit wiring diagram.

2.Use only copper conductor for connections between field-supplied electrical disconnect switch and unit. DO NOT USE ALUMINUM WIRE.

3.Be sure that high-voltage power to unit is within operating voltage range indicated on unit rating plate.

4.Insulate low-voltage wires for highest voltage contained within conduit when low-voltage control wires are in same conduit as high-voltage wires.

5.Do not damage internal components when drilling through any panel to mount electrical hardware, conduit, etc.

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