Multi F Engineering Manual

Table Of Contents

From Indoor Units to Remote Controllers

• Communication cable from indoor unit to remote controller(s) is to be 22 AWG, 3-conductor, twisted, stranded, unshielded. Wiring must

comply with all applicable local and national codes.

• If using the LG Controller / Extension cable and the length needs to be extended, the LG Extension Kit (sold separately) must be used. A

maximum of four (4) kits (up to 165 feet) can be used.

• Remote controllers have hardwired connections: SIG - 12V - GND (Comm.) terminals.

• Indoor unit controller connections depend on type of indoor unit being installed. Some indoor units use terminal block connections; other

indoor units use Mollex connections. See diagrams below for the two options. Refer to the wiring diagram schematic found in the indoor unit

itself, or to the indoor unit wiring diagrams in the Engineering Manuals for more information.

•

NEVER splice, cut, or extend cable length with field provided cable. Always include enough cable to cover distance between the indoor

unit and the remote controller.

• Set the indoor unit operating parameters using DIP switches, or by setting up the remote controller. Refer to the indoor unit installation

manuals for more details.

Cable connected to Zone Controller is the factory default connection.

Figure 53: One Example of Indoor Unit to Zone Controller Connection.

BACnet+

BACnet-

BACnet Common

Not used

Common

456

13 14 15

Typical Indoor Unit

Signal

12VDC

CN-REMO

Indoor Unit

Front

CN-REMO

RDBKYL

Back

Figure 54: Another Example of Indoor Unit to Zone Controller

Connection.

,QGRRU8QLWV&RQWUROOHUV

ELECTRICAL CONNECTIONS

'XHWRRXUSROLF\RIFRQWLQXRXVSURGXFWLQQRYDWLRQVRPHVSHFL¿FDWLRQVPD\FKDQJHZLWKRXWQRWL¿FDWLRQ

62 | ELECTRICAL CONNECTIONS

Multi F and Multi F MAX Heat Pump System Engineering Manual

MULTI

MAX

MULTI