PROPER WIRING
The following is a summary
of proper electrical
connections
1. All crimp connections should meet ABYC standards and be watertight. Heat shrink tubing should be used to ensure these connections are watertight. Fork or ring terminals must be used on all connections made within the electrical box. Bare wires cannot be connected to the power terminals.
2. All 115/230 V AC power feeds must be installed and grounded following ABYC standards.
3. The proper circuit protection must be used. SC05DC/SC07DC 50A, SC12DC/RadAir™ (RT12DC) 60A, SC05VI/ SC09VI 10A, SC17VI 15A.
4. If installing more than one air conditioner, each one will need to have a dedicated circuit breaker.
5. The color touch display is connected to the display and the air conditioner control box
with a standard 15’ CAT5 ethernet cable. If the cable is not long enough, a longer cable, up to 50’, can be purchased from any electronics store. The color touch display should be installed in a dry location inside the boat. The current color touch
display is not water-proof.
6. For proper wire sizes, please use a wire gauge calculator or ABYC chart. 3% is the maximum recommended voltage drop. On DC calculations, length is round trip, not one way.
7. Our 12 V DC air Conditioners SC5DC,
SC7DC, SC12DC, and RadAir™ (RT12DC) need to have the drain pan grounded or bonded to the ship’s ground. This is seen in the
picture below.
DC Grounding Screw
For Mabru 12V DC air conditioners (SC5DC, SC7DC, and SC12DC), bonding or grounding to the ship’s ground is required. Failure to ground the DC air conditioner will void the unit’s warranty and increase the risk of
corrosion.
Wire Sizing Table/ 3% Loss
Full 12V DC System
Wiring Diagram for SC5DC, SC7DC and SC12DC