Speci C Wiring Method - ComfortStar AHU18-M Owner's Manual & Installation Manual

CAUTION
While connecting the wires, please strictly
•
follow the wiring diagram.
The refrigerant circuit can become very
•
hot. Keep the interconnection cable away
from the copper tube.
WARNING
ISOLATE THE POWER SUPPLY AND
COMMUNICATION LEADS AS SHOWN IN
THE DIAGRAM,KEEP POWER SUPPLY
LEADS AWAY FROM COMMUNICATION
LEADS.
5. Clamp down the cable with the cable clamp.
The cable must not be loose or pull on the
u-lugs.
6. Reattach the electric box cover.
Specific wiring method
Connection method A:
Refer to the wiring method of internal and
external machine communication and wired
controller as follows:
(A)
Indoor unit
Wired
controller R C L G Y1
Y1/Y2
Wired
controller
(B)
Indoor unit
Wired
controller
R C L G Y1 Y1/Y2 B W
Wired
controller
Page 40
 
B W W1 W2 E DH S1 S2
S1 S2
Outdoor
Unit
W1 W2 E DH L1(1) L2(2) S(3)
L1(1) L2(2) S(3)
Outdoor
Unit
WARNING
Please refer to the wiring nameplate for the
wiring method. Do not connect the power
cord to the communication line, as this may
damage the system.
Connection method B:
To use a 24V thermostat, you need to refer to the
following wiring:
(A)
R C G Y1 Y2 B W
R C G Y1 Y2 B W W1 W2 E DH L
24V thermostat
(B)
R C G Y1 Y2 B W
R C G Y1 Y2 B W W1 W2 E DH L
24V thermostat
NOTE: The wiring method of the thermostat and
the internal machine refers to the wiring of the
non-communication scheme.
Indoor unit
W1 W2 E DH L S1 S2
S1 S2
Outdoor
Unit
Indoor unit
W1 W2 E DH L
L1(1) L2(2) S(3)
L1(1) L2(2) S(3)
Outdoor
Unit