Haier FlexFit Pro Series Service Manual page 52

Electrical Connections Indoor and Outdoor Units
14/4 AWG stranded wire only. (Central Controller Not Used)
Maintain 10 feet of separation between TV and any radio wiring.
Note: High ESP Duct unit ships with YR-E17 wired controller. See Section E for more information.
See Step 3.2 of the outdoor unit installation section for how to pull a vacuum.
Step 3 - Electrical Connections
Indoor uni t
3wire 1 4/4AWG
Control Wiring
Step 4 - Evacuate System
Indoor uni t
3wire 1 4AWG
Control Wiring
50
Outdoor unit
Power
Wiring
Power
Wiring
FlexFit Pro