Carrier 50TC Disconnect Switch and Unit, Units Without Factory-InstalledDisconnect, All units

50TC

The unit is factory wired for the voltage shown on ;the nameplate. Refer to the unit label diagram for additional information.

!WARNING

FIRE HAZARD

Failure to follow this warning could result in intermittent operation or performance satisfaction.

Do not connect aluminum wire between disconnect switch and air conditioning unit.. Use only copper wire. (See Fig. 17.)

ELECTRIC

DISCONNECT

SWITCH

COPPER

WIRE ONLY

ALUMINUM

WIRE

A93033

Fig. 17 - Disconnect Switch and Unit

Units Without Factory-Installed Disconnect —

When installing units, provide a disconnect switch of adequate size per local or national wiring code. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes. Do not cover unit informative plate if mounting the disconnect on the unit cabinet.

Units with Factory-Installed Disconnect —

The factory-installed option disconnect switch is located in a weatherproof enclosure located under the main control box. The manual switch handle is accessible through an opening in the access panel.

All units -

All field wiring must comply with all local codes. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 18 for power wiring connections to the unit power terminal block and equipment ground.

Provide a ground-fault and short-circuit over-current protection device (fuse or breaker) per local code (or U.S.A. NEC Article 440). Refer to unit informative data plate for MOCP (Maximum Over-current Protection) device size.

All field wiring must comply with the appropriate national electrical codes and local requirements.

Units Without Disconnect Option

C IFC

11 13 13

Disconnect

L1 L2 L3

Units With Disconnect Option

Factory

Wiring

1 3 5

Optional

Disconnect

Switch

2 4 6

L1 L2 L3

Disconnect factory test leads; discard.

C09411

Fig. 18 - Power Wiring Connections

Table 2 – American/European Wire Conversions

AMERICAN		EUROPEAN
Industry	American	European
Standard Size	Conversion (mm2)	Standard Size (mm2)
20 AWG	0.52	0.5
18 AWG	0.82	1.0
16 AWG	1.30	1.5
14 AWG	2.08	2.5

Thru-Base Connections —

This service connection kit consists of a 12.7 mm (1/2-in) electrical bulkhead connector and a 31.75 mm (11/4-in) electrical bulkhead connector, all factory-installed in the embossed (raised) section of the unit basepan in the condenser section. The 12.7 mm (1/2-in) bulkhead connector enables the low-voltage control wires to pass through the basepan. The 31.75 mm (11/4-in) electrical bulkhead connector allows the high-voltage power wires to pass through the basepan. See Fig. 19.

LOW VOLTAGE

CONDUIT

CONNECTOR

HIGH VOLTAGE

CONDUIT

CONNECTOR

C08637

Fig. 19 - Thru-Base Connection Fittings

14