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MCW Modular Chiller 7.5 and 10 ton

FEATURES ---------------
Innovative Modular Design
  • Individual modules can be linked in any combination of 2, 3, 4 or 5 unit groupings (or more) to provide a wide range of capacity requirements.
  • Compact base design provides flexibility in engine room layouts.
  • Multiplexed modules offer precise BTU requirements for any application.
  • Lightweight aluminum construction enhances ease of installation while providing corrosion-resistant durability.
  • Easy component access for field adjustments or service.
High Efficiency Components
  • Matched components provide full rated capacity and assure maximum performance.
  • High-tech compressors offer reduced amperage draw up to 25%.
  • Standard reverse cycle operation keeps heat/cool amp draw consistent.
  • Bi-flow expansion valves balance systems between heat and cool modes.
  • Compact stainless steel brazed plate heat exchangers are designed for maximum efficiency in a confined place.
  • Condenser coils are constructed with cupronickel to provide high corrosion resistance.
  • Control circuits monitor and protect the system through the use of aqua stats, pressure switches, timers, and freeze controls.
Quality Assurance
  • Each unit is pre-charged, load tested and calibrated at the factory.
  • Charge Guard© protection provides sealed access ports, ensuring environmental protection and system integrity.
  • All units meet or exceed applicable ABYC and U.S. Coast Guard regulations, CE Directives and general Air Conditioning and Refrigeration Industry (ARI) standards.

*Cooling and heating capacities are given at performance ratings of 100 degrees Fahrenheit (38 degrees Celsius) condensing temperature and 35 degrees Fahrenheit (2 degrees Celsius) evaporating temperature.
*460/380 specifications are available upon request.
*Electrical box may be remotely mounted.
*Standard models operate at 60Hz and 50Hz. However, there is a 17% reduction in capacity when operating at 50Hz. (Full capacity 50Hz only units are available upon request.)
*Low voltage (24VAC) control circuits are available for multiple-staged systems.

Model MCW90S-RC MCW120S-RC
Capacity (BTU/H)
Cool 90,000 120,000
Reverse Cycle 99,000 132,000
Refrigerant Electrical Data
Voltage (VAC) 230V/60Hz/3o 230V/60Hz/3o
FLA 19.6 24.6
LRA 195 247
KVA (Kilo-Volt-Amps) 5.8 8.0
Max. Circuit Breaker 100 125
Min. Circuit Ampacity 55 73
Dimensions (
Length 24.0/61.0 24.0/61.0
Width 16.0/41.0 16.0/41.0
Height 310/140 380/172
Installation Guidelines for MCW Modular Chiller 7.5 and 10 ton
When choosing the proper model MCW Modular Chiller 7-1/2 and 10 ton condensing unit, primary consideration should be given to calculated BTU loads and available power supply. Any special requirements (capacity modifications, voltages, cycles, auxiliary heat, etc.) should be determined prior to installation.

The location of the MCW Modular Chiller 7-1/2 and 10 ton condensing unit should b dry and accessible for service. Secure the condensing unit to level horizontal shelves with the Marine Air System's supplied hold-downs. These supports are designed to hold the weight of the equipment as well as handle any torsional movement. If a Marine Air Systems frame base is supplied and the chillers are already mounted, secure by drilling trough the frame base at convenient 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 sea water circuit. The hose is to be routed upwards from the thru-hull intake to the condensing unit to prevent air locks in the centrifugal sea water pump. All hose fittings are to be double-clamped. Circulation connections between the condensing unit and chilled water lines are to be made with properly sized fittings and reinforced marine grade hose. All fittings are to be double clamped. Ball valves should be installed at chilled water inlet/outlet of MCW unit and each air handler for overall serviceability of system. Insulate all hose and fittings proper

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 this drain pan spud and route it downward to a proper sump or overboard discharge outlet.

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 using the grounding lug provided on each unit's chassis. Electrical boxes are pre-wired and require no wiring to the electrical box. Mechanical control panels can be remote mounted in a convenient location, using the four mounting screws provided.

All chilled water condensing units use closed-refrigerant circuits, pre-charged with R-22. No additional refrigerant is required during the installation or at initial 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 the EPA, only certified technicians should perform service on, or make adjustments to, the refrigerant circuit

In the interest of product improvement, Marine Air Systems' specifications and design as outlined herein are subject to change without prior notice.

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