Carrier Infinity 480CEN024 Installation Instruction page 13

UNIT COMPONENT DAMAGE H AZARD
Failure tofollow this caution could r esult indamage tothe u nit
being i nstalled.
1.Make a llelectrical connections inaccordance with NEC
ANSI/NFPA (latest edition) and local e lectrical codes
governing s uchwiring.In Canada, all electrical
connections must bein accordance withCSA standard
C22.1 Canadian Electrical (;ode P art 1and a pplicable local
codes. Refer tounit w iring diagram.
2.Useonlycopper conductor forconnections between
field-supplied electrical disconnect switch a nd unit. D O
NOT USE ALUMINUM WIRE.
3.Be sure t hat high-voltage power tounit i swithin o perating
voltage range indicated onunit r ating p late. On 3-phase
units, ensure phases are balanced within 2 percent. Consult
local power company forcorrection ofimproper voltage
and/or phase imbalance.
4.Insulate low-voltage wires f orhighest voltage contained
within c onduit when l ow-voltage control wires a re i nsame
conduit as high-voltage wires.
5.Donot d amage internal components when d rilling t hrough
any panel tomount electrical hardware, conduit, etc.
See u nit wiring l abel 16 or17 and F ig. 1 2 for r eference when m aking
high voltage and User Interface control connections.
TRANSFORMER PROTECTION
The t ransformer isofthe energy-limiting type. Itisset t owithstand
a30-sec. overload orshorted secondary condition.
HIGH-VOLTAGE CONNECTIONS
When routing power leads into unit, use only copper wire between
disconnect and unit. The high voltage leads should be inaconduit
until they e nter the duct panel; conduit termination at t he duct panel
must bewatertight.
Theunit musthavea separate electrical service w ith a
field-supplied, waterproof disconnect switch mounted at. o rwithin
sight from, the unit. R efer tothe unit r ating p late. NEC and local
codes formaximum fuse/circuit breaker size a nd minimum circuit
amps (ampacity) forwire sizing ( See Table 3forelectrical data).
The field-supplied disconnect switch box may b emounted onthe
unit o ver the high-voltage inlet h ole w hen t he standard power and
low-voltage entry p oints a re used ( See Fig. 5 and 6foracceptable
location).
Proceed as follows tocomplete the high voltage cnnnections tothe
unit.
User Interface
._.-
Outdoor Air Thermistor
HUMIDIFIER
(24 VAC)
LEGEND
Factory Wiring
Field Wiring
......
Infinity
Control Board
OAT
HUM
W2
Y1
HUM
G
?,OM
r/W1
'/Y2
R
Fig. 12 - Control-Voltage Connections
A06038
Single phase units:
1. Run the high-voltage (L1, L2) and ground lead into the
control box.
2. Connect ground lead to chassis ground connection.
3. Locate the black and yellow wires connected to the line side
of the contactor.
4. Connect field L1 to black wire on connection 11 of the
compressor contactor.
5. Connect field wire L2 to yellow wire on connection 23 of the
compressor contactor.
Three-phase units:
1. Run the high-voltage (L1, L2, L3) and ground lead into the
control box.
2. Connect ground lead to chassis ground connection.
3. Locate the black and yellow wires connected to the line side
of the contactor.
4. Connect field L1 to black wire on connection 11 of the
compressor contactor.
5. Connect field wire L2 to yellow wire on connection 13 ofthe
compressor contactor.
6. Connect field wire L3 to blue wire from compressor.
13