Connecting The Cable Between Indoor Unit, Distributor Unit And Outdoor Unit; Connect The Cable To The Indoor Unit - LG MULTI F Installation Manual
Multi-zone heat pump systems
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- Engineering manual (224 pages) ,
- Installation manual (65 pages) ,
- Install (9 pages)
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Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit
Connect the cable to the Indoor unit.
Connect the cable to the indoor unit by connecting the wires to the terminals on the control
board individually according to the outdoor unit connection. (Ensure that the color of the wires
of the outdoor unit and the terminal No. are the same as those of the indoor unit.)
The ground wire should be longer than the common wires.
The circuit diagram is not subject to change without notice.
When installing, refer to the electrical diagram behind the front panel of Indoor Unit.
The wiring for the outdoor unit can be found on the inside of the Outdoor Unit control cover.
RECOMMENDATION:
• The circuit diagram is subject to change without notice.
• Be sure to connect wires according to the wiring diagram.
• Connect the wires firmly, so that they can not be pulled out easily.
• Connect the wires according to color codes by referring to the wiring diagram.
RECOMMENDATION: Provide a
circuit breaker between power
source and the outdoor unit as
shown below.
Outdoor Unit
Power source Fuse or breaker
Capacity
(Btu/h class)
18/24k
1ø,208/230V
36k
1ø,208/230V
54k
1ø,208/230V
RECOMMENDATION: The power cord connected to the outdoor unit should
comply with the following specifications: NRTL Recognized(for example, UL or
ETL recognized and CSA certified).
n Power supply cable
n Connecting cable
RECOMMENDATION: When using separate wires as the power cord, please secure
separate wires in the control box panel using tie wraps to hold all wires in place.
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit
Capacity
20A
25A
40A
As always, final wire selection is governed by local codes
and should be installed by a licensed professional contrac-
tor.
18/24kBtu/h
The power connecting cable between the outdoor and in-
door units must comply with the following specifications:
NRTL Recognized (for example, UL or ETL recognized and
CSA certified).
AWG 18-4 is the minimum recommended wire size,
however, the selected conductors must comply with local
codes and be suitable for installation in wet locations.
Main power source
Air
Conditioner
The minimum recommended wire size
36kBtu/h
54kBtu/h
Circuit Breaker
Use a circuit breaker
or time delay fuse.
AWG 14-3
AWG 12-3
AWG 8-3
Installation Manual 35
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