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INSTALLATION INSTRUCTIONS
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.
WARNING
!
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
3 PHASE ONLY
FIELD GROUND
WIRING
Fig. 6 - Line Power Connections
Connect Control Wiring
Route 24- v control wires through control wiring grommet and
connect leads to control wiring. See Thermostat Installation
Instructions for wiring specific unit combinations.
Use No. 18 AWG color- coded, insulated (35_C minimum)
wire. If thermostat is located more than 100 ft. (30.48 m)
from unit, as measured along the control voltage wires, use
No. 16 AWG color- coded, insulated wire to avoid excessive
voltage drop.
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, 24- v/40- va minimum.
NOTE: Use of available 24- v accessories may exceed the
minimum
40- va
power
6
CONTACTOR
BLUE
GROUND
LUG
requirement.
Determine
total
Specifications subject to change without notice.
R- 410A Split System Heat Pumps
transformer load and increase the transformer capacity or
split the load with an accessory transformer as required.
Observer
Communicating
Wall Control
Green
DX+
Yellow
DX-
White
C
Red
R
S1
Optional Remote
Room Sensor
S2
Humidifier
Connection
Fig. 7 - Observer Communicating Wall Control Four- Wire
Connection Diagram
Non- Communicating
Non- Communicating
HP Thermostat
Fig. 8 - Generic Wiring Diagram for Standard Thermostat
Installations
NOTE: Wiring must conform to NEC or local codes.
NOTE: For standard thermidistat or thermostat wiring, see
Installation Instructions for those products.
Communicating
Variable Speed
Furnace/Fan Coil
Green
DX+
DX+
Yellow
DX-
DX-
White
C
C
Red
R
R
HUM
COM
Fan Coil
428 01 5400 00
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