| When
choosing the proper model Passagemaker, primary consideration should
be given to calculated BTU loads and available power supply. Any
special requirements (box capacity, air condenser exhaust, wiring
sizes, etc.) should be determined prior to installation. The
location of the Passagemaker condensing unit should be dry and
accessible for service. The unit should be installed with the
fasteners provided and secured to a horizontal or vertical surface
sufficient to support the weight and torsion load from the vessel’s
movement. The remote electrical box may contain position-sensitive
components (labeled as such on the outside of the box). Fasten in
the appropriate position using the mounting hardware provided. The
sea water system must be installed below the water line and routed
on a continuous incline from a dedicated thru-hull intake to the
pump inlet, up to the condensing unit to prevent air locks in the
sea water pump. Reinforced marine grade hose should be used for the
sea water circuit, and all fittings should be double-clamped. The
refrigeration lines connecting the holding plate(s) to the
condensing unit must be constructed from refrigeration grade,
dehydrated copper and must be properly insulated (suction line only
or both lines insulated together). All fittings are designed for
flare connections, and these connections are to be made using proper
flaring tools and techniques during installation. A non-leak
compound may be used on flare connections, |
if
desired, to prevent refrigerant leaks (due to vibration or loosening
of suction side connections due to frost). This compound should be
applied sparingly to the male threads of the fitting, and great care
must be taken to prevent contact with the flare seat. Flare
connections must be adequately tightened, usually as tight as
possible, with the exception of 1/4” lines which can be crushed if
the flare is over tightened. All associated mechanical components
(solenoid valves, check valves and expansion valves) must be located
and secured properly. Thermostats are to be located and properly
secured in the box(es) or on bulkheads with sensing bulbs properly
secured into the sensing wells located on the holding plates.
Circuit breakers and wire gauges must be sized according to ABYC
marine design standards. Only stranded tinned copper should be used.
All equipment must be properly grounded. Refrigerant line sets and
holding plates must be thoroughly evacuated (recommended to 200
microns) and leak checked prior to releasing refrigerant from the
condensing unit into the system and start-up of the equipment. The
refrigerant charge may require adjustment once the entire system is
operational. In keeping with regulations set forth by the EPA, only
certified technicians should perform service on, or make adjustments
to, the refrigerant circuit. |
