Electrical Connections, Grounding and Bonding
Turn off air conditioner power supply circuit breaker before opening electric box.
All air conditioner units have a terminal strip mounted inside the electric box. The terminal strip is labeled for proper
connections of the electrical supply, ground wires and pump circuits. A wiring diagram is provided in the electrical
box and later in this manual. The wiring diagram in the electrical box supersedes any found in this manual and
ABYC standards. The correct size circuit breaker should be used to protect the system as specified within the
technical specifications section. A minimum of 12 AWG boat cable should be used to supply power to the air
conditioning unit and the seawater pump. All connections should be made with ring or captive fork terminals.
Each air conditioner installed requires its own dedicated circuit breaker. If there is only one air conditioner installed,
the seawater pump does not require a circuit breaker; the wiring from the seawater pump is connected to the
terminal strip in the electric box. If two or more air conditioners use the same seawater pump, the pump wires will
be connected to a pump relay, Please refer to the wiring diagram. Electrical connections in the bilge and/or below
the waterline should use heat shrink type butt splices. Field wiring must comply with ABYC electrical codes. Power
to the unit must be within the operating voltage range indicated on the data plate. Properly sized marine grade
circuit breakers must be installed for circuit protection. All units must be effectively grounded to minimize the
hazard of electrical shock and personal injury. Make sure to connect the green grounding wire to the GRND stud
within the electrical box per ABYC standard E-8, or equivalent.
1. Connections between the vessel's AC system grounding conductor (green wire) and the vessel’s DC
(Direct Current) negative or bonding system should be made as part of the vessel's wiring, per ABYC
standard E-9, or equivalent.
• When servicing or replacing existing equipment that contains a chassis-mounted ground stud, the
installer must check the vessel's wiring for the existence of the connection required in item 1
above.
The air conditioner unit must be connected to the ship's bonding system to prevent
corrosion due to stray electrical current or voltage. All pumps, metallic valves and fittings
in the seawater circuit that are isolated from the air conditioning unit by PVC or rubber
hoses must be individually bonded to the vessels bonding system. This will help eliminate
any possibility of corrosion due to stray current or voltage.
To Next Page
Loading...
Need help?
General
