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SECTION I
GENERAL INFORMATION
GENERAL
The MAR SPLIT UNITS are pratically the
"EvaporatingUnitSection"completewithdriving
mechanism and control devices, all encased in
theirstainlesssteelcabinets,formakingcomple-
te scale-ice maker system
The MAR SPLIT UNITS must be remotely
connectedtoa corresponding size"Condensing
Unit" to become a MAR scale-ice maker plant, it
is therefore of primary importance first, the
selection of the right type and size of all the
componentstobeusedtocompletetherefrigerant
systemandsecondly-butnotleast-theskillness
oftherefrigeration engineers thatwill proceed in
completingthesystembymakingtherefrigerant,
hydraulic and electrical connections.
APPLICATION AREA
Thescale-icemakersystemusingtheMARSplit
Units,appliestodifferentsortofmarketsituations
where scale-ice is needed. Most specific areas
are:
a) Fishing Vessels
b) Fish Markets and Fish Processing Plants
c) Supermarkets
d) Meat packaging plants
Basicallytheycangoinanyplacewhere there is
alimitedspacesituationorwherethecondensing
unit (compressor/condenser) must be located in
aroomwherenoiseandheatisnotobjectionable.
MAR Split can be set to produce "THICK ICE"
generally used in the fishing industry or "THIN
ICE" generally used in the meat processing
industry.
Standard versions are set for "THICK ICE"
production (about 2 mm thickness) and for fresh
water operation. Different conditions should be
specified when ordering the Units.
Modular combinations are possible to increase
output ice production.
COMPLETE SYSTEM INSTALLATION - How
it is made
The complete scale-ice making system can be
divided in three major groups, that are:
a) thecompressorandcondenserunitwiththeir
own components with their own refrigerant
and water lines fittings and electric wires
terminal block.
b) the evaporator drum unit (MAR Split Unit
supplied by Frimont) complete with drive
mechanism,drivemotor,refrigerantandwater
linesfittings,refrigerantsexpansionvalveand
electric wire junction box.
c) consolepanelandcontrolboxwithcompressor
ON/OFF switch, relay, timer, warning lights,
pressure gauges and electrical wire terminal
block.
Forinstallationonboardoffishingvesselswhere
the electrical power available is not sufficient or
adequatetorunthecompressor,amechanicalor
hydraulic drive transmission must be used.
Thesedrivesystemswillnotbecoveredindetails
in this manual as it is assumed that their
fundamentals have been already mastered to
the installator engineer by more specific
publications.
CONDENSING UNIT
Thecompressor istrulytheheartofthesystem,
when it becomes inoperative refrigeration
immediately ceases. Therefore the selection of
propertypeandsizeofcompressortogetherwith
the proper type and size of condenser, their
components and controls, deserve the most of
attention by the refrigeration engineer.
ForourMARicemakingsystem,thecompressor
to take is consideration are ot two basic types:
a) the accessible Semi-Hermetic-Motor-
Compressorforinstallationonsiteswherethe
electricalpowersupplyisavailableinadequate
quantity and quality.
b) the Open Type Compressor for automative
installations(FishingVessels)withmechanical
pneumatic or hydraulic drive system through
a magnetic clutch.
Whatever is the type of compressor being used,
it is recommended, for its selection, to observe
the refrigerant capacity on the following table:
MAR 78 3200 Kcal/h -18°C Evap. Temp.
MAR 108 4800 Kcal/h -24°C Evap. Temp.
MAR 128 6000 Kcal/h -24°C Evap. Temp.
MAR 208 8250 Kcal/h -20°C Evap. Temp.
MAR 308 9700 Kcal/h -30°C Evap. Temp.
