8/8/2014
VECTOR COMPACT
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ELECTRICAL CONNECTIONS, GROUNDING AND BONDING
All a/c 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 this manual. The correct size circuit breaker
should be used to protect the system as specified on the a/c unit’s data plate label. A minimum of 12 AWG boat cable should be
used to supply power to the a/c unit and the sea water pump. All connections shall be made with ring or fork terminals. Turn off
a/c power supply circuit breaker before opening electric box.
Each a/c unit installed requires its own dedicated circuit breaker. If there is only one a/c unit installed, the sea water pump does
not require a circuit breaker, the wiring from the sea water pump is connected to the terminal strip in the electric box. If two or
more a/c units use the same sea water pump, the pump wires will be connected to a pump relay panel (PRP) which in turn has
its own dedicated circuit breaker sized for the pump (20 amp max). Please see the wiring diagram furnished with the PRP
(NOTE: PRP triac must have mounting screw installed in order to dissipate heat). 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 fuses or HACR circuit breakers must be installed for branch circuit protection. See data plate for
maximum fuse/circuit breaker size (mfs) and minimum circuit ampacity (mca). All units must be effectively grounded to minimize
the hazard of electrical shock and personal injury. The following are to be observed:
1.AC (alternating current) grounding (green wire) must be provided with the AC power conductors and connected to the
ground terminal (marked A) at the AC power input terminal block of the unit(s), per ABYC standard E-8, or equivalent.
2.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.
3.When servicing or replacing existing equipment that contains a chassis-mounted Aground@ stud, the service person or
installer must check the vessel’s wiring for the existence of the connection required in item 2 above.
ABYC standards are available from:American Boat and Yacht Council
Telephone: (410) 956-1050
The a/c 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 sea water circuit that are isolated from the a/c unit by PVC or rubber
hoses must be individually bonded to the vessels bonding system also. This will help eliminate any possibility of corrosion due to
stray current or voltage.
FAILURE TO PROPERLY GROUND AND BOND THE SYSTEM WILL VOID WARRANTY!
3 PHASE NOTICE
It is extremely important to insure that wiring and phase sequencing of a three phase power source is correct. Marine wiring
standards call for power source phases L1, L2, and L3 to be color-coded BLACK, WHITE, and RED, respectively. These
must be connected to the unit with the proper sequence, otherwise, it will not operate properly. If the wiring sequence is
incorrect, the unit’s compressor (Scroll type only) and pump (if applicable) will run in the reverse direction at a significantly