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1. The indoor unit is powered from the outdoor unit. A sufficient length of conduit and wiring shall be used from the
outdoor unit to the indoor unit.
2. To access the terminal block inside the indoor unit, remove the screw on the cover plate. (See Fig. A.)
3. Connect the inter unit conductors to terminals marked 1,2,3, on the indoor unit corresponding to the same numbered
terminals from the outdoor unit. (See Fig.B.)
Figure B
Terminal block of indoor unit
Installation & service manual _8
ELECTRICAL CONNECTIONS FOR INDOOR AND OUTDOOR UNITS
Terminal block
Cover plate
Figure A
INDOOR UNIT
OUTDOOR UNIT
Conduit
Conduit
connectors
Incoming power supply
To indoor unit
1. Two conduit connection openings are provided on the outdoor unit: one for incoming power supply and the second one for
the inter unit wiring.
2. Remove the terminal box cover to access the terminal block.
3. Connect the power supply conductors to terminal marked L1, N or L1, L2, and the grounding wire to terminal
marked .
4. Connect the inter unit conductors to terminals marked , 3, 2, 1.
Conduit
Conduit
connectors
Incoming power supply
To indoor unit
9SRA-HE | 12SRA-HE | 15SRA-HE (115V - 60Hz)
18SRA-HE | 24SRA-HE (208-230V - 60Hz)