For best results
when printing this document, choose LANDSCAPE formatting from your Print Set-Up
MCW Modular Chiller
7.5 and 10 ton
modules can be linked in any combination of 2, 3, 4 or 5 unit
groupings (or more) to provide a wide range of capacity
- Compact base
design provides flexibility in engine room layouts.
modules offer precise BTU requirements for any application.
aluminum construction enhances ease of installation while
providing corrosion-resistant durability.
- Easy component
access for field adjustments or service.
components provide full rated capacity and assure maximum
compressors offer reduced amperage draw up to 25%.
- Standard reverse
cycle operation keeps heat/cool amp draw consistent.
expansion valves balance systems between heat and cool modes.
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
- Control circuits
monitor and protect the system through the use of aqua stats,
pressure switches, timers, and freeze controls.
- 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.
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.
specifications are available upon request.
box may be remotely mounted.
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.)
voltage (24VAC) control circuits are available for multiple-staged
Guidelines for MCW Modular Chiller 7.5 and 10 ton
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
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
completion of leak tests to prevent condensation and energy or
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