When choosing the proper model 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 unit's 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*F.

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.

Refrigerant-grade copper tubing should be properly sized for the specific application. Both the suction and liquid lines should be insulated separately with approved closed cell foam jackets (i.e., Rubatex 1/4" wall thickness). The refrigerant line ends should remain capped until the actual connections are made to prevent contamination. To prevent kinks in the tubing, which will adversely affect the performance and longevity of the system, tube benders are recommended.

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.

The installed line sets and evaporator(s) must be evacuated to remove air from these components and prevent moisture acidity formation. All connections should be properly leak-checked upon releasing the refrigerant charge must be "pumped down" back into the condensing unit or recovered to prevent it from escaping into the atmosphere.

Refer to other individual component sheets for specifications and details of evaporators, controls and related parts.