Power Supply And Wiring - Carrier REFRIGERANT R-410A Installation And Service Instructions Manual

Power Supply and Wiring —
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.
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)
ELECTRIC
DISCONNECT
SWITCH
WIRE ONLY
ALUMINUM
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
Check the unit data
COPPER
WIRE
1
/ -in. ring terminal.
4
FAN SCROLL
MOTOR
AND DRIVE
CONDENSATE
DRAIN
CONNECTION
(HORIZONTAL)
FILTER
ELEMENTS
FILTER
RETAINER
CLIP
LEGEND
TXV — Thermostatic Expansion Valve
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.
FAN
CONTACTOR
24V
TERMINAL
BLOCK
POWER
WIRING
KNOCKOUT
Fig. 16 — Fan Contactor Box and Terminal Block
(Cover Removed) (Typical)
17
FAN
CONTACTOR
BOX
WIRE
ACCESS
FAN DRIVE
PULLEY
COIL
TXV BULB
ACCESS
REFRIGERANT
PIPING ACCESS
CONDENSATE
DRAIN
CONNNECTION
(VERTICAL)