Installation Guidelines for MCW Chiller Series

When choosing the proper model MCW Chiller condensing unit, primary consideration should be given to calculated BRU loads and available power supply. Any special requirements (capacity modifications, voltages, cycles, auxiliary heat, etc.) should be determined prior to odering.

The location of the MCW Chiller condensing unit sould be dry and accessible with the supplied brackets. These brackets are designed to hold the weight od the equipment as well as handle any torsional movement. If a Mrine Air Systems frame base is supplied and the chillers are already mounted, secure by drilling through the frame base at convineint locations. Do not stack units directly on top of each other. Each condensing unit must be independently supported.

Reinforced marine grade hose is to be used for the seawater cirsuit. The hose is to be routed upwards from the thru-hull intake to the condensing unit to prevent air locks in the centrifugal seawter pump. Circulation connections between the condensing unit and chilled water lines are to be made with properly sized fittings and reinforced marine grade hose. All hose connections are to be double clamped. Ball valves should be installed at chilles water inlet / outlet of each MCW unit and each air handler for overall serviceability of system. Insulate all hose and fittings properly upon completion of leak tests to prevent condensation and energy or capacity loss.

The chassis has an integral condensation drain pan for removal of any water that may form. Secure a hose to the drain spud and route it downward to a proper sump or overhead discharge oulet.

All circuit breakers and wire gauge must be sized according to marine design standards. Only stranded tinned copper wire should be used. Route all wiring through the strain-relief connectors provided in the electrical boxes. All equipment should be properly grounded and bonded using the lug provided on each unit's chassis. Electrical boxes a pre-wired for power and control circuits. Electrical boxes can be remote mounted in a convenient location with the standard five foot harness. Field wiring is required between remote switch and unit electrical box.

All chilled water condensing units use closed-refrigerant circuits, pre-charged with R-22. No additional refrigerant is required the installation or at intial start-up and operation of the system. Refer to other individual component sheets for specifications and details of air handlers, controls and related parts. In keeping with regulations set forth by EPA, only certified technicians should perform service on, or make adjustments to, any refrigerant circuit.

Never install your air handler in bilge or engine room areas. Insure that the selected location is sealed from direct access to bilge and/or engine room vapours. Do not terminate condensate drain lines within four(4) feet of any outlet of engine or generator exhaust systems, nor in a compartment housing an engine or generator, nor in a bilge (vapours can travel up the drain line), unless the drain is connected properly to a sealed condensate or shower sump pump. Failure to comply may allow bilge or engine room vapours to mix with the air handlers return air and contaminate living areas.