Carrier 24VNA9 Infinity 19VS Installation Instructions Manual page 6

NOTE: Install branch circuit disconnect of adequate size per NEC
to handle unit starting current. Locate disconnect within sight from
and readily accessible from unit, per Section 440- -14 of NEC.
Route Ground and Power Wires
Remove access panel to gain access to unit wiring. Extend wires
from disconnect through power wiring hole provided and into unit
control box.
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
The unit cabinet must have an uninterrupted or unbroken
ground to minimize personal injury if an electrical fault
should occur. The ground may consist of electrical wire or
metal conduit when installed in accordance with existing
electrical codes.
Connect Ground and Power Wires
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 6.
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
FIELD POWER
WIRING
FIELD GROUND
WIRING
Fig. 6 - - Line Power Connections
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
WARNING
TERMINAL
BLOCK
GROUND
LUG
Connect Control Wiring- - Infinity Touch
Connect to Infinity connections. Only two wires (AB) to Infinity
capable indoor unit (furnace or fan coil) are required. Connect C if
additional grounding is required (see Fig. 7).
IMPORTANT: This system requires the power supplied to the
outdoor unit, and the indoor unit, for the UI to communicate with
the outdoor unit.
Connect Control Wiring- - Non- - Communicating
4 wires are required when connecting 24VNA9 models to
non- -communicating 2- -stage thermostats. Use Fig. 8 For required
connections. Unit is configured by factory for Infinity
communicating control.
control, disconnect the green (A) and yellow (B) wires from
ABCD plug and connect appropriate wires to low voltage terminal
block. Use wire nuts to attach thermostat wire to LVCH harness.
General Information
Use No. 18 AWG or larger color- -coded, insulated (35C
minimum) wire for low voltage control wires.
All wiring must be NEC Class 2 and must be separated from
incoming power leads.
Use furnace transformer, fan coil transformer, or accessory
transformer for control power requirement of system accessories
external to the OD unit. The outdoor unit has its own transformer
power.
Final Wiring Check
IMPORTANT: Check factory wiring and field wire connections to
ensure terminations are secured properly. Check wire routing to
ensure wires are not in contact with tubing, sheet metal, etc.
User Interface (UI)
D
C
B
A
A14028
Humidifier
Fig. 7 - - Infinity Furnace or Fan Coil Wiring with
Communicating Variable Speed AC
6
To wire unit for non- -communicating
Furnace or Fan Coil
D
C
B
A
'C' connection optional
Catalog No: 24VNA9--- 3SI (rev 1)
Replaces: 24VNA9--- 2SI
VS AC
D
C
B
A
A11144AC