When choosing the proper model Central System Multi Ton Condensing Unit, primary consideration should be given to calculated BTU loads and available power supply. Special consideration should be given in determining the reverse cycle heating capacities under anticipated conditions. Reverse cycle operation is affected by the sea water temperature. As it decreases, the units heat transfer capacity also decreases and proportionately affects the output of warm air. It is not recommended that the unit be operated in the heat cycle with water temperatures below 40 ° Fahrenheit.

The location of the condensing unit should be dry and accessible for service, and provide the most direct routing of refrigerant line sets relative to the evaporator location(s). The vibration isolated condensing unit should be secured to a horizontal shelf that is designed for the weight of the unit and torsion loads from the vessel's movement. The remote electrical box may be fastened to a bulkhead using the hardware provided.

When using the multiple evaporators with one condensing unit, locate all unions and tee fittings properly in areas accessible for service. Use approved flaring technique and refrigerant grade components for all connections.

Insulate fittings using cork insulation tape or foam tape (only after system has been leak-checked). Wrap fittings sufficiently to equal R-value of tube insulation. Reinforced marine grade hose should be used for the sea water circuit. All hose fittings should be double clamped. The hose should be routed upward from the thru hull intake to the condensing unit to prevent air locking and provide draining of the sea water circuit. The condensation drain should be connected and routed downward to a proper sump or overboard discharge.

All circuit breakers and wire gauge must be sized according to marine design standards. Only stranded tinned copper wire should be used. All equipment must be properly grounded.