IM-KSAIC03-02 Specifications subject to change without notice. 15
APPENDIX 2 - PIPING ADAPTER BUSHINGS/REDUCERS
A piping adapter kit 331831-701 (sold through RDC) is necessary when removing the factory supplied TXV on the indoor unit.
APPENDIX 3 - FV4C TRANSFORMER
This transformer is factory wired for 230V AC operation. For 208V AC applications, disconnect the black wire from the 230-v terminal on the
transformer primary side and connect it to the 208V terminal (See Fig. 22).
Fig. 22 —Transformer Connections on FV4C Fan Coils
APPENDIX 4 - ADDITIONAL REFRIGERANT CHARGE FOR CONVENTIONAL
FAN COILS
When matching the FMA4 and FMC/FMU indoor units, the size 12 units require 12.4 oz. (350 g) more refrigerant due to the size of the indoor
coil.
No refrigerant addition is necessary for the FV4 (any size).
All the outdoor units are shipped from the factory pre-charged for 25ft of piping length. See installation instructions of the outdoor unit for
additional charge requirements on longer piping lengths.
Model Size Bushings/Reducers Required (Field Supplied)
FMA
FMC
12-18
3/4” - 1/2” Suction only
3/8” - 1/4” Liquid
24-36
3/4” - 5/8” Suction only
3/8” - 1/4” Liquid
FMU
FV4
12-18 3/8” - 1/4” Liquid and 3/4” - 1/2” Suction
24-36 3/4” - 5/8” Suction only
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