Power supply and wiring, In. ring terminal, Fig. 14 — disconnect switch and unit – Carrier REFRIGERANT R-410A User Manual

Page 17

Power Supply and Wiring —

Check the unit data

plate to ensure that available power supply matches electrical
characteristics of the unit. Provide a disconnect switch with an
integrated lock-out feature of size required to provide adequate
fan motor starting current. See Tables 4-6 for unit electrical
data.

Fig. 14 — Disconnect Switch and Unit

Install disconnect switch and power wiring in accordance with
all applicable local codes. See Fig. 15-17 and the unit label
diagram. Connect power wiring with

-in. ring terminal.

Fig. 15 — Wiring and Service Access

(Side Panel Removed)

Fan motors are factory-installed on all units. Indoor-fan
contactors are located in the fan contactor box behind the side
access panel (see Fig. 15 and 16). Wire the thermostat to the
24-v control circuit terminal block located in the side of the fan
contactor control box, according to Fig. 17 or the unit label
diagram. If the air handler is part of a split system, complete the
wiring from the condensing unit to the thermostat shown in
Fig. 17.

Fig. 16 — Fan Contactor Box and Terminal Block

(Cover Removed) (Typical)

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.

FIRE HAZARD
Failure to follow this warning could result in intermittent
operation or performance satisfaction.
Do not connect aluminum wire between disconnect switch
and condensing unit. Use only copper wire.
(See Fig. 14)

COPPER

WIRE ONLY

ELECTRIC

DISCONNECT

SWITCH

ALUMINUM

WIRE

FILTER
ELEMENTS

FILTER
RETAINER
CLIP

FAN SCROLL

CONDENSATE
DRAIN
CONNECTION
(HORIZONTAL)

MOTOR
AND DRIVE

FAN
CONTACTOR
BOX

WIRE
ACCESS

COIL

FAN DRIVE
PULLEY

TXV BULB
ACCESS

REFRIGERANT
PIPING ACCESS

CONDENSATE
DRAIN
CONNNECTION
(VERTICAL)

LE GEND

TXV — Thermostatic E xpansion Valve

2 3

2 2

2 1

1 3

1 2

1 1

FAN
CONTACTOR

24V
TERMINAL
BLOCK

POWER
WIRING
KNOCKOUT