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6
Connect the wires to the corresponding terminal blocks. For wiring instructions, refer to wiring diagrams on page 13 to 24.
Name
F1
F2
F3
F4
Y1
Y2
Terminal Block
G
W1
W2
D
O/B
R
C
G1
Connector
G2
G3
Compression ring terminal specifications for connection to the AHU Control Unit (ACU) PCB.
Range of Permitted Wires
Rated Size Stud Size
AWG
mm² (inch²)
mm² (inch²) mm (inch)
0.25 to 1.65
22 to 16
(0.0003 to 0.0025)
(0.0023)
•
F1, F2 communication wire: Maximum distance from outdoor unit to the ACU: 100m (328 ft)
•
F1, F2 communication wires: 18 AWG solid core
G3 (RED)
G2 (BLU)
Fan speed (step) control
G1 (YEL)
Outdoor unit communication
Outdoor unit communication
Reserved
Reserved
Compressor Stage 1
Compressor Stage 2
Indoor fan
Auxiliary heater Stage 1
Auxiliary heater Stage 2
Dehumidification
4-way reversing valve
AC Power 24 V
AC Power 24 V
Fan speed (step) control, YEL
Fan speed (step) control, BLU
Fan speed (step) control, RED
t
1.5
3
0.7
(0.1181)
(0.0275)
Input
Description
E
W
Stud
F
L
t
Basic Size [mm (inch)]
ØD
G
E
3.8
10.0
4.5
(0.1496)
(0.3937)
(0.1771)
Output
ØD
G
F
W
6.5
6.0
(0.2559)
(0.2362)
(0.8346)
English
L
21.2
11
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