Carrier 48TC Instruction Manual download pdf (Page 16)

Non--powered type: This type requires the field

installation of a general--purpose 125--volt 15--A circuit

powered from a source elsewhere in the building. Observe

national and local codes when selecting wire size, fuse or

breaker requirements and disconnect switch size and

location. Route 125--v power supply conductors into the

bottom of the utility box containing the duplex receptacle.

Unit--powered type: A unit--mounted transformer is

factory--installed to stepdown the main power supply

voltage to the unit to 115--v at the duplex receptacle. This

option also includes a manual switch with fuse, located in

a utility box and mounted on a bracket behind the

convenience outlet; access is through the unit’s control

box access panel. See Fig. 24.

The primary leads to the convenience outlet transformer

are not factory--connected. Selection of primary power

source is a customer--option. If local codes permit, the

transformer primary leads can be connected at the

line--side terminals on the unit--mounted non--fused

disconnect or HACR breaker switch; this will provide

service power to the unit when the unit disconnect switch

or HACR switch is open. Other connection methods will

result in the convenience outlet circuit being de--energized

when the unit disconnect or HACR switch is open. See

Fig. 26.

C08283

UNIT

VOLTAGE

CONNECT

PRIMARY

CONNECTIONS

TRANSFORMER

TERMINALS

208,

230

240

L1: RED +YEL

L2: BLU + GRA

H1 + H3

H2 + H4

460 480

L1: RED

Splice BLU + YEL

L2: GRA

H2 + H3

575 600

L1: RED

L2: GRA

Fig. 26 -- Powered Convenience Outlet Wiring

Using unit--mounted convenience outlets: Units with

unit--mounted convenience outlet circuits will often

require that two disconnects be opened to de--energize all

power to the unit. Treat all units as electrically energized

until the convenience outlet power is also checked and

de--energization is confirmed. Observe National Electrical

Code Article 210, Branch Circuits, for use of convenience

outlets.

Fuse on power type: The factory fuse is a Bussman

“Fusetron” T--15, non--renewable screw--in (Edison base)

type plug fuse.

NOTICE

Convenience Outlet Utilization

Maximum Intermittent use : 15 Amps 2 to 3 Hours

Maximum Continuous use : 8 Amps 24/7

50HJ542739 3.0

A9225

Fig. 27 -- Convenience Outlet Utilization Notice Label

Duty Cycle: the unit--powered convenience outlet has a

duty cycle limitation. The transformer is intended to

provide power on an intermittent basis for service tools,

lamps, etc; it is not intended to provide 15--amps loading

for continuous duty loads (such as electric heaters for

overnight use). Observe a 50% limit on circuit loading

above 8--amps.

Convenience outlet usage rating:

Continuous usage: 8 amps maximum

Intermittent usage: up to 15 amps maximum for

up to 2 hours maximum

Test the GFCI receptacle by pressing the TEST button on

the face of the receptacle to trip and open the receptacle.

Check for proper grounding wires and power line phasing

if the GFCI receptacle does not trip as required. Press the

RESET button to clear the tripped condition.

Factory--Option Thru--Base Connections (Electrical

Connections)—

This service connection kit consists of a

-- i n N P T g a s

adapter fitting (brass), a

--in electrical bulkhead

connector and a

--in electrical bulkhead connector, all

factory--installed in the embossed (raised) section of the

unit basepan in the condenser section. The

-- i n

bulkhead connector enables the low--voltage control wires

to pass through the basepan. The

--in electrical

bulkhead connector allows the high--voltage power wires

to pass through the basepan. See Fig. 14.

Check tightness of connector lock nuts before connecting

electrical conduits.

Field--supplied and field--installed liquid tight conduit

connectors and conduit may be attached to the connectors

on the basepan. Pull correctly rated high voltage and low

voltage through appropriate conduits. Connect the power

conduit to the internal disconnect (if unit is so equipped)

or to the external disconnect (through unit side panel). A

hole must be field cut in the main control box bottom on

the left side so the 24--v control connections can be made.

Connect the control power conduit to the unit control box

at this hole.

48TC

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Carrier 48TC Instruction Manual Page 16

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