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Phase
MODEL NAME
and fre-
Voltage
quency
DX17VSS421AA
1 Phase
DX17VSS481AA
208/230V
60Hz
DX17VSS601AA
l
v
c
oW
oltage
onnectIonS
The unit is designed to work as part of a fully communicating
HVAC system, utilizing a ComfortNet™ thermostat, Comfort-
Net compatible indoor unit, and up to four wires. Route control
wires through the low voltage port and terminate in accor-
dance with the wiring diagram provided inside the top plate.
SHIELDING PLATE
LOW
VOLTAGE
WIRE
voltage Ports
note: The communicating thermostat is able to search and
identify the indoor and outdoor units when power is applied to
the system. Refer to the communicating thermostat's instal-
lation instruction manual for more information.
Connect low voltage communication wires (1, 2) to low volt-
age pigtail provided.
c
W
ommunIcatIon
IrIng
note: A removable plug connector is provided with the
control board to make thermostat wire connections. This plug
may be removed, wire connections made to the plug, and
replaced. Do not connect multiple wires into a single terminal.
Typical 18 AWG wire may be used to wire the system compo-
nents. However, communications reliability may be improved
by using a high quality, shielded, twisted pair cable for the
data transmission lines.
MOP
MCA
(Max.
Transmis-
(Min.
overcur-
sion line
circuit
rent
selection
amp.)
protective
device)
34.0 A
35 A
18 AWG
34.0 A
35 A
(typical)
35.5 A
40 A
Tie high voltage wire and
ground wire with clamp
material (accessory)
VINYL TUBE
(accessory)
GROUND
WIRE
HIGH
VOLTAGE
WIRE
t
-W
o
, f
Wo
Ire
utdoor
Low voltage wiring consists of two wires between the indoor
unit and air conditioner and four wires between the indoor
unit and thermostat. The required wires are data lines 1 and
2, "R" (24 VAC hot) and "C" (24 VAC common).
Never connect the power wiring to communication terminal.
(1, 2, R, C)
1
2
R C
(a)
(a)+(b)
=125 ft.(*)
1
2
R C
250 ft.(*)
1
2
R C
(*) Allowable Maximum Length
System Wiring (in case of ctK04)
Attention inStAller -
iMPortAnt notice!
Please read carefully before installing this unit.
• For DX17VSS, do NOT install the 24 Volt Transformer
that is included with the ctK04 Thermostat.
• Do not attach any wires to the R & C Terminals on the
Air Conditioner, as they are not needed for inverter
unit.
• Data line terminal #1 from air conditioner must connect
to terminal #1 on indoor unit and thermostat and data
line terminal #2 from air conditioner must connect to
terminal #2 on indoor unit and thermostat. Verify wires
are not reversed.
11
11
-W
I
W
our
Ire
ndoor
IrIng
CTK04
(b)
Thermostat
CT™ Compatible
Gas Furnace or
Modular Blower
1
2
Integrated Control Module
CT™ Compatible
Case Coil
Integrated
CT™ Compatible AC
Control Module
Integrated Control Module
R C
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