LG ARNH963K2A2 - Dry Contact Wiring

36
MULTI V Hydro Kit Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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ROUGHING-IN
Dry Contact Wiring
Dry Contact - Wiring
Procedure
Connect a CN_DRY with the third party binary contact and moni-
toring relays to CN-DRY terminals 1 through 4 as shown in either
Figure 27 or Figure 28. External wiring is provided by others.
Dry contact
Controller
CN-CC
DRY CONTACT
PCB
INPUT
AC 220V
LG does not
supply this section
4 4
3 3
2 2
1 1
2 2
1 1
RY1
RY2
CN_DRY
NL
Operation Display
Error Check Display
Figure 27: Dry Contact - Direct Power Wiring
DRY CONTACT
PCB
LG does not
supply this section
Dry contact
Controller
CN_DRY
4
3
2
4
3
2
1 1
2
2
1
1
L
N
AC 220V
RY1
RY2
CN-CC
DRY CONTACT
PCB
Operation Display
Error Check Display
Figure 28: Dry Contact - Indirect Power Wiring
Dry Contact May Be Powered Using Two Methods
•Power Source wired directly to the Dry Contact Terminals 1
and 2 and subsequently providing power to the third party
binary switch (Figure 27).
•Power source wired to the third party binary switch (device)
providing power to the Dry Contact (Figure 28).