Table of Contents
Advertisement
Installer's Guide
Power Supply Wiring
1. Open the side covering plate.
2. Connect the power wiring to the terminals "L1", "L2" and also to the grounding bolt, and
then connect the wiring terminals "N(1), 2, 3" of the indoor unit to those of the outdoor unit
correspondingly.
3. Fix the power wiring with wire clips to provide strain relief for the field wiring.
4. Run the power wiring through conduit (as required by NEC) attached to the round electrical
connection ports.
Note: When connecting the power supply wiring, make sure that the phase of the power supply
matches with the voltage and phase on the nameplate, If not, the compressor will run improperly.
Field Wiring Specifications Between Indoor and Outdoor Units
The wiring, including the ground wire, between the indoor and outdoor units should be at least
14 AWG, 600 volt rated, type stranded, four conductor wire, with an absolute maximum length of
230 ft. (70m). Type SO cable (temporary wire) is not recommended. Shorter lengths result in more
robust communication between the indoor and outdoor unit. Please select an appropriate length
according to the installation conditions. The wires cannot be cut and spliced together.
Consult local and regional codes, as well as the NEC, for installation requirements that are
applicable to the selected type of cable including watertight conduit and raceway requirements.
Power supply wiring should be installed according to the NEC, local and regional codes. Refer to
the equipment nameplate for electrical requirements.
Grounding Requirements
•
Follow your local, State and National Electric Codes (NEC) when grounding this unit.
•
The air conditioner is classified as a Class I appliance and must be grounded.
•
The yellow-green wire of the air conditioner is the ground wire and cannot be used for other
purposes or cut off, otherwise it would create an electric shock hazard.
•
Do not ground the unit to a utility pipe, arrester or telephone ground. Incomplete ground may
cause electrical shock or fire. A high current surge from lightning or other sources may cause
damage to the air conditioner.
Installation of Controllers
Refer to the controller installation manual for instructions and functionality.
28
88-M4MHW23-1A-EN
Advertisement
Table of Contents
