Carrier 48TC Instruction Manual download pdf (Page 14)

Step 12 — Make Electrical Connections

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Do not use gas piping as an electrical ground. Unit

cabinet must have an uninterrupted, unbroken

electrical ground to minimize the possibility of

personal injury if an electrical fault should occur. This

ground may consist of electrical wire connected to

unit ground lug in control compartment, or conduit

approved for electrical ground when installed in

accordance with NEC (National Electrical Code);

ANSI/NFPA 70, latest edition (in Canada, Canadian

Electrical Code CSA [Canadian Standards

Association] C22.1), and local electrical codes.

WARNING

NOTE: Field--supplied wiring shall conform with the

limitations of minimum 63_F(33_C) rise.

Field Power Supply —

If equipped with optional Powered Convenience Outlet:

The power source leads to the convenience outlet’s

transformer primary are not factory connected. Installer

must connect these leads according to required operation

of the convenience outlet. If an always--energized

convenience outlet operation is desired, connect the

source leads to the line side of the unit--mounted

disconnect. (Check with local codes to ensure this method

is acceptable in your area.) If a de--energize via unit

disconnect switch operation of the convenience outlet is

desired, connect the source leads to the load side of the

unit disconnect. On a unit without a unit--mounted

disconnect, connect the source leads to compressor

contactor C and indoor fan contactor IFC pressure lugs

with unit field power leads.

Refer to Fig. 26 for power transformer connections and the

discussion on connecting the convenience outlet on page 15.

Field power wires are connected to the unit at line--side

pressure lugs on compressor contactor C and indoor fan

contactor IFC (see wiring diagram label for control box

component arrangement) or at factory--installed option

non--fused disconnect switch. Max wire size is #2 AWG

(copper only). (See Fig. 22.)

NOTE: TEST LEADS -- Unit may be equipped with

short leads (pigtails) on the field line connection points on

contactor C or optional disconnect switch. These leads are

for factory run--test purposes only; remove and discard

before connecting field power wires to unit connection

points. Make field power connections directly to line

connection pressure lugs only.

Disconnect

per

NEC

Disconnect

per

NEC

208/230-1-60

13 13

L2 L3

C IFC

(1-ph

IFM)

208/230-3-60

460-3-60

375-3-60

575-3-60

Units Without Disconnect Option

Units With Disconnect Option

Optional

Disconnect

Switch

Disconnect factory test leads; discard.

Factory

Wiring

C07494

Fig. 22 -- Power Wiring Connections

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. Discard the

factory test leads (see Fig. 22).

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 48TC unit. Use only copper wire.

(See Fig. 23.)

COPPER

WIRE ONLY

ELECTRIC

DISCONNECT

SWITCH

ALUMINUM

WIRE

A93033

Fig. 23 -- Disconnect Switch and Unit

48TC

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 47 48

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Carrier 48TC Instruction Manual Page 14

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