Installation Instructions

16 31-5000486 Rev. 2
Thermostat Connections
(Only for air handler without electric heater)
ATTENTION: Thermostat must energize reversing valve in heat mode using the “B” terminal.
Installation Instructions
Indoor Unit
Outdoor Unit
Power
Power
Thermostat
Y
B
W1
R
C
G
Y
B
W1
R
C
G
Y
B
W1
R
C
G
L2
L1
XT1
XT2
L2
L1
G
L2
L1
G
L2
L1
XT1
XT2
X1
X1
8kw Heat Kit
See Note
G
CB1CB1
AP1
Power
G
L1
L2
Fan motor
X1
1
XT3
DC_MOTOR1
TC
RD
BK
BU
YE
WH
1
X1
2 3 4 5 6
G
M
XT1-1
XT1-2
8KW HEAT KIT
G
CB1 CB1
L1
L2
G
YEGN
W1
W2
BK
RD
AP2
G
CN1
COM2
W7 W8
W9
W10
W11
W12
Thermostat
Heat
W13
X1 X2
X10
X4
X3
X9 X13X7
Y
B
W1
R
C
G
Y
XT2
C
Y
G G
Y
C
B B B
W1 W1 W1
R R R
C
①
W5
W6
W3
W4
N 2
1
XT1
1
Code Name
CB1 Circuit breaker
TC Transformer
XT1~XT3 Wiring board
Y
B
4-way valve control
signal, energized under
the heating mode
W1 Heater control signal
R 24V AC power supply
C 24V common
G Indoor unit fan signal
Indoor Unit - 2/3 ton
Note:
1. Please refer to the Instruction Manual to check
whether the unit can connect to the engineerig
electric heating.
2. When the unit doesn't connect to the engineering
electric heating, connect the engineering power
supply to the L1 and L2 of wiring board.
3. When the unit connects to the engineering electyric
heating, connect the engineering power supply to
the breaker.
Note:
1. Please refer to the instruction manual to check whether the unit can connect to the engineering electric heating.
2. When the unit doesn’t connect to the engineering electric heating, connect the engineering power supply to the W5(BK) and W6(WH) of X1.
3. When the unit connects to the engineering electric heating, connect the engineering power supply to the breaker.
4. The primary input voltage of transformer is defaulted at 230V(BK). When switching the power supply of the complete unit to 208V, connect the
primary input voltage of transformer to 208V(BU), which can be realized by exchanging the black wire and the blue wire.
5. 1 Only applicable for the unit whose motor is with earthing wire.