Scotsman MAR 78 User manual

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09014400
Scotsman Ice Srl
Via Lainate, 31 - 20010 Pogliano M.se - Milano - Italy
Tel. [phone] (Aut. Sel.)- Telefax [phone]
Direct Line to Service & Parts:
Phone [phone] - Fax [phone]
Website: www.scotsman-ice.it
E-Mail: [email protected]
ISO 9001 - Cert. n. 0080
SERVICE MANUAL
MAR 78
MAR 108
MAR 128
MAR 208
MAR 308
SPLIT
RN
090144 00 - REV. 03/2016

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FOREWORD
SCOTSMANMARSPLITUNITSareavailablein
fivebasicmodelsMAR 78,MAR108,MAR128,
MAR208andMAR308operatingbyfreshwater.
MAR78,MAR128andMAR308onlyareavailable,
uponrequest,presettedtooperatebyseawater.
Theycomecompletewithastainlesssteelcabinet,
with a drive motor at V. 230/50/3 or 400/50/3-N
Volt,withexpansionvalve,heatexchanger,float
reservoir,timedelayswitch,binthermostat,water
pump, ice spout switch, liquid solenoid valve,
water pressure control evaporator pressure ctl.
valve.
The refrigerating and electrical system must be
completedbythepurchaseraspertheinstructions
given in this service manual who has to provide
forthecompletecondensingunit,itscontrolsand
refrigerant tubings.
Wesuggesttotaketime now to readthismanual
which contains a lot of valuable informations on
the MAR Split System.
For any further queries regarding the care or
operation of the machine, please contact:
ICE SYSTEMS
®
SCOTSMAN - EUROPE - FRIMONT SPA
Via Puccini, 22 - 20010 Bettolino di Pogliano (Milano) Italy
Tel. [phone] (Aut. Sel.)- Telefax [phone]
Direct Line to Service & Parts:
Phone [phone] - Fax [phone]
Website: www.scotsman-ice.com
E-Mail: [email protected]
®

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TABLE OF
CONTENTS
Foreword page 2
Table of contents 3
Specifications 4-9
Section I GENERAL INFORMATION
General 10
Application area 10
Condensing unit 10
Control devices 11
Location considerations 12
Refrigerant lines 12
Hydraulic circuit 12
Ice storage room 12-14
Unit layout 15
Section II INSTALLATION
Unpacking and inspection 16
Location and levelling 16
Refrigerant piping connections 16
Water piping connections 17
Water and refrigerant circuit 17
Electrical connections 18
Installation practice 19
Mar Split in multiple installation 20
Typical non-code commercial installation 20
Section III TESTING
Complete system leak test 21
Complete system evacuation 21
Complete system charging 21
Start-up & Check-out 21
Operational check-out 21-23
Section IV PRINCIPLE OF OPERATION - HOW IT WORKS
ICE maker 24
MAR Split electrical/refrigeration 25-26
Section V ADJUSTMENT & REMOVAL & REPLACEMENT
PROCEDURES
MAR Split 27-28
Section VI MAINTENANCE & CLEANING INSTRUCTIONS 29-32
Section VII SERVICE DIAGNOSIS 33-34
Section VIII WIRING DIAGRAMS 35

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SPECIFICATIONS
MAR 78 - 108 - 128 - 208 - 308
AB
C
Ø 1
Ø 2
Ø 3 Ø 4
(*) "THICK ICE" SETTING - AT 10°/10°C (ambient/water temp.)
TECHNICAL SPECIFICATION
SPLIT
MODEL Basic
Electricals Ice Production (*) Kg/24 Hr. Drive Motor Finish Shipping
Weight
VSea water Fresh W. Kcal/Hr Hp Amp kg
MAR 78 400/50/3 - N
230/50/3 510 3200 1/2 SS
MAR 108 400/50/3 - N
230/50/3 670 4800 1/2 1.2
2.1 SS
MAR 128 400/50/3 - N
230/50/3 1000 6000 1/2 1.2
2.1 SS
MAR 208 400/50/3 - N
230/50/3 1650 8250 1/2 1.2
2.1 SS
MAR 308 400/50/3 - N
230/50/3 2200 9700 1/2 1.2
2.1 SS
131
131
131
223
223
****
****
850
****
Cooling req.ts
1800
Evap.T.°C
-18
-24
-24
-20
-30
1.2
2.1
A B C Ø1Ø2Ø3Ø4
MAR 78 621 876 520 3/4" gas 3/8" gas 3/4" gas 21 mm
MAR 108 621 876 520 3/4" gas 3/8" gas 3/4" gas 21 mm
MAR 128 621 876 520 3/4" gas 3/8" gas 3/4" gas 21 mm
MAR 208 661 1297 520 3/4" gas 1/2" gas 28 mm 21 mm
MAR 308 661 1297 520 3/4" gas 1/2" gas 28 mm 21 mm
Ø1 = GAS LINE CONNECTION (SUCTION)
Ø3 = WATER INLET FITTING
Ø2 = LIQUID LINE CONNECTION
Ø4 = WATER OUTLET CONNECTION

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MAR 78 SPLIT
Set for Fresh water Operation
ICE MAKING CAPACITY
IMPORTANT OPERATING REQUIREMENTS:
WATER LEVEL IN DRUM RESERVOIR 115-120 mm
WITH WATER PUMP / SPRAY BAR
DRUM ROTATING SPEED 1.1 RPM (thick ice)
CONDENSING CAPACITY 4900 Kcal/hr (TD 10 ÷15 °C)
HEAD PRESSURE SETTING 15 ÷17 Bar on air cooled units
17 Bar on water cooled unit
LOW PRESSURE SETTING 2.2 Bar on air cooled units
1.8 Bar on water cooled units
HI-PRESSURE CONTROL SETTING 34 ±2 Bar A/C
30 ±2 Bar W/C
LO-PRESSURE CONTROL SETTING 0.2 Bar
WATER PRESSURE CONTROL SETTING 0.8 Bar
MAX. WATER TEMPERATURE 35 °C
MIN. WATER TEMPERATURE 5 °C
MIN. WATER PRESSURE 1 atm.
MAX. WATER PRESSURE 5 atm.
MIN. AMBIENT TEMPERATURE 5 °C
MAX. AMBIENT TEMPERATURE 40 °C
MAX. VOLTAGE VARIATION ±10%
NOTE.Theproductiondiagramsherebelowrepresentedcanbeusedasreference,sincethedata
indicated have been obtained with a air/water cooled condensing unit equipped with a hermetic
compressor type U.H. TFH 2480Z providing - 3200 Kcal/hr at -18 ° C Refrigerating capacity.
520
500
480
460
440
420
400
380
360
340
Kg./24 h
°C
32 27 21 15
°C
10
21
32
38
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10
Thicker scale ice

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MAR 108 SPLIT
Set for Fresh water Operation
ICE MAKING CAPACITY
IMPORTANT OPERATING REQUIREMENTS:
WATER LEVEL IN DRUM RESERVOIR 115-120 mm
WITH WATER PUMP / SPRAY BAR
DRUM ROTATING SPEED 1.5 RPM (thick ice)
2.3 RPM (thin ice)
CONDENSING CAPACITY 7500 Kcal/hr (TD 10 ÷15 °C)
HEAD PRESSURE SETTING 15 Bar on air cooled units
15 Bar on water cooled unit
LOW PRESSURE SETTING 1.6 Bar on air cooled units
HI-PRESSURE CONTROL SETTING 36 Bar
LO-PRESSURE CONTROL SETTING 0.2 Bar
WATER PRESSURE CONTROL SETTING 0.8 Bar
MAX. WATER TEMPERATURE 35 °C
MIN. WATER TEMPERATURE 5 °C
MIN. WATER PRESSURE 1 atm.
MAX. WATER PRESSURE 5 atm.
MIN. AMBIENT TEMPERATURE 5 °C
MAX. AMBIENT TEMPERATURE 40 °C
MAX. VOLTAGE VARIATION ±10%
NOTE.Theproductiondiagramsherebelowrepresentedcanbeusedasreference,sincethedata
indicated have been obtained with a air/water cooled condensing unit equipped with a hermetic
compressor type U.H. TAG 2516Z providing - 4800 Kcal/hr at -24 ° C Refrigerating capacity.
750
700
650
600
550
500
450
Kg./24 h
°C
32 27 21 15
°C
10
21
32
38
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10
Thicker scale ice

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MAR 128 SPLIT
Set for Fresh water Operation
ICE MAKING CAPACITY
NOTE.Theproductiondiagramsherebelowrepresentedcanbeusedasreference,sincethedata
indicated have been obtained with a air/water cooled condensing unit equipped with a hermetic
compressor type U.H. TAG 2522Z providing - 6000 Kcal/hr at -24 ° C Refrigerating capacity.
IMPORTANT OPERATING REQUIREMENTS:
WATER LEVEL IN DRUM RESERVOIR 115-120 mm
WITH WATER PUMP / SPRAY BAR
DRUM ROTATING SPEED 2.4 RPM (thick ice)
CONDENSING CAPACITY 9750 Kcal/hr (TD 10 ÷15 °C)
HEAD PRESSURE SETTING 14 ÷16 Bar on air cooled units
LOW PRESSURE SETTING 1.6 Bar on air cooled units
HI-PRESSURE CONTROL SETTING 36 Bar
LO-PRESSURE CONTROL SETTING 0.2 Bar
WATER PRESSURE CONTROL SETTING 0.8 Bar
MAX. WATER TEMPERATURE 35 °C
MIN. WATER TEMPERATURE 5 °C
MIN. WATER PRESSURE 1 atm.
MAX. WATER PRESSURE 5 atm.
MIN. AMBIENT TEMPERATURE 5 °C
MAX. AMBIENT TEMPERATURE 40 °C
MAX. VOLTAGE VARIATION ±10%
1000
950
900
850
800
750
700
650
600
38 °C
32 27 21 15
AIR COOLED UNITS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
10 5
10
21
Thicker scale ice

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MAR 208 SPLIT
Set for Fresh water Operation
ICE MAKING CAPACITY
NOTE.Theproductiondiagramsherebelowrepresentedcanbeusedasreference,sincethedata
indicated have been obtained with a air/water cooled condensing unit equipped with a hermetic
compressor type DORIN K500 CS providing - 8250 Kcal/hr at -20 ° C Refrigerating capacity.
IMPORTANT OPERATING REQUIREMENTS:
WATER LEVEL IN DRUM RESERVOIR 90-95 mm
WITH WATER PUMP / SPRAY BAR
DRUM ROTATING SPEED 1.05 RPM (thick ice)
1.60 RPM (thin ice)
CONDENSING CAPACITY 11000 Kcal/hr (TD 10 ÷15 °C)
HEAD PRESSURE SETTING 16 ÷18 Bar on air cooled units
16 ÷17 Bar on water cooled unit
LOW PRESSURE SETTING 1.9 Bar
HI-PRESSURE CONTROL SETTING 36 Bar
LO-PRESSURE CONTROL SETTING 0.2 Bar
WATER PRESSURE CONTROL SETTING 0.8 Bar
MAX. WATER TEMPERATURE 35 °C
MIN. WATER TEMPERATURE 5 °C
MIN. WATER PRESSURE 1 atm.
MAX. WATER PRESSURE 5 atm.
MIN. AMBIENT TEMPERATURE 5 °C
MAX. AMBIENT TEMPERATURE 40 °C
MAX. VOLTAGE VARIATION ±10%
1700
1600
1500
1400
1300
1200
1100
Kg.
38 °C
32 27 21 15
°C
32
38
AIR COOLED UNITS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
WATER COOLED UNITS
10 5
10
21
1900
1800
1700
1600
1500
1400
1300
Kg.
38 °C
32 27 21 15
°C
DE 10 A' 38
o
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10 5
10
21
Thicker scale ice
Thiner scale ice

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MAR 308 SPLIT
Set for Fresh water Operation
ICE MAKING CAPACITY
NOTE.Theproductiondiagramsherebelowrepresentedcanbeusedasreference,sincethedata
indicatedhavebeenobtainedwithaair/watercooledcondensingunitequippedwithasemihermetic
compressor type DORIN K1000 CS providing - 9700 Kcal/hr at -30 ° C Refrigerating capacity.
IMPORTANT OPERATING REQUIREMENTS:
WATER LEVEL IN DRUM RESERVOIR 90 mm
WITH WATER PUMP / SPRAY BAR
DRUM ROTATING SPEED 1.6 RPM (thick ice - air cooled)
1.8 RPM (thick ice - water cooled)
2.9 RPM (thin ice)
CONDENSING CAPACITY 16200 Kcal/hr (TD 10 ÷15 °C)
HEAD PRESSURE SETTING 15 Bar on air cooled units
14 Bar on water cooled unit
LOW PRESSURE SETTING 1 Bar on air cooled units
0.75 Bar on water cooled unit
HI-PRESSURE CONTROL SETTING 34 ±2 A/C Bar
30 ±2 W/C Bar
LO-PRESSURE CONTROL SETTING 0.2 Bar
WATER PRESSURE CONTROL SETTING 0.8 Bar
MAX. WATER TEMPERATURE 35 °C
MIN. WATER TEMPERATURE 5 °C
MIN. WATER PRESSURE 1 atm.
MAX. WATER PRESSURE 5 atm.
MIN. AMBIENT TEMPERATURE 5 °C
MAX. AMBIENT TEMPERATURE 40 °C
MAX. VOLTAGE VARIATION ±10%
2600
2400
2200
2000
1800
1600
1400
Kg.
38 °C
32 27 21 15
°C
32
38
AIR COOLED UNITS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
WATER COOLED UNITS
10 5
10
21
2800
2600
2400
2200
2000
1800
1600
Kg.
38 °C
32 27 21 15
°C
DE 10 A' 38
o
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10 5
10
21
Thicker scale ice
Thiner scale ice

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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.

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The approximate heat transfer capacity for the
condenser selection is shown on the herebelow
table
The condenser is basically a heat exchanger
wheretheheatabsordedbytherefrigerantduring
theevaporatingprocessisgiventothecondensing
medium which could be the air or the water.
When using marine type condenser a marine
type, water regulating valve is requested as well
to modulate the cooling water flow within
condenser.
Recommendend valve is the pressure actuated
"PENN".
The Liquid receiver is a storage tank for liquid
refrigerant that can be useful on refrigeration
splitinstallationtomakethequantityofrefrigerant
in the system less critical.
It is normally provided with two service valves
and occasionally can be built-in the bottom of
condenser. It is a common component used in
refrigerationplantandshouldbelargeenoughto
hold all the refrigerant in the system.
TheOilseparatorshouldbefilledwithoilduring
installation until the float valve just begins to
open. This oil quantity always remains in the
separatorandwouldotherwisebetakenfromthe
compressor.
It is well known that when the compressor
operates, small amount of oil is pumped out
along with the hot compressed vapor and to
prevent it from going any further in the system,
the oil separator traps it to return, upon opening
of its float valve, to the crankcase of the
compressor.
CONTROL DEVICES
The scale-ice maker system must be completed
withallthenecessarysafetydevicesandcontrols
in order to fully protect it and to minimize
operational checks and functions, however any
excessinusingautomaticcontrolsandprotections
may complicate the situation at the point that
some of the controls be eliminated later, by the
user.
Inorderto help theinstallatorengineer to decide
with which controls he has to equip a given
system, we cover all the necessary ones
mentioning for each of them the positive factors
and eventually the negative ones.
High Pressure Control
Very important - No negative factors Set to
values shown on techn. spech. Not supplied.
Water Pressure Control
Very important - No negative factors Set to 0.8
atm-cut-in - 0.5 atm cut-out. Supplied.
Lo Pressure Control
Very important because in case of refrigerant
leaksattheevaporator, itpreventstodrawinthe
system some water from the drum reservoir. It
alsopreventstodrawairthroughthecompressor
crank-shaftseal.Thismayoccureduringvacuum
operations of the system.
However, it may inopportunely trip-off at the
systemstart-upandifsuctionoperatingpressure,
on account of the excessive rotating speed of
compressor or excessive compressor capacity,
is very close and gets below its setting value,
which is 0.2 atm. Not supplied.
MAR 78 MAR 108 MAR 128 MAR 208 MAR 308
300 lt/hr 450 lt/hr 84*****h1200 lt/hr 1600 lt/hr
Particularcaremustbedeservedtotheselection
of the water cooled condenser expecially the
marine type for fishing vessels installation.
They can be marine type (cupro-nickel) tube
within a tube condenser with plasticized heads.
Withwaterinlettemperatureof+20°Candoutlet
of+30°Catcondensingtemperatureof32°Cthe
water consumption should be:
MAR 78 MAR 108 MAR 128 MAR 208 MAR 308
4900 Kcal/h 7500 Kcal/h 9750 Kcal/h 11000 Kcal/h 16200 Kcal/h

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LOCATION CONSIDERATION
WARNING-TheMARSCALEICEMAKERS
arenotdesignedforoutdoorsinstallations
where air temperature falls below 5°C
(40°F) and may exceed 40°C (100°F)
Operating a machine with an unacceptable
configurationwillvoidtherefrigerationsystem
warranty.
For installation on board of fishing vessels, the
location for the condensing unit is generally the
engine room, while the evaporator unit can be
permanently placed in some area of the deck-
houseorifitisnottoocold(notbelow5°C),inside
the fish and ice hold.
Incaseastandisgoingtobemadeandusedplan
for adequately fastening the MAR SPLIT UNIT.
The stand must be steady made to do not cause
excessivevibrationsandmusthavethepossibility
to be securely fastened to the wall or to the floor.
In relation to evaporator position and situation a
certainkindoficechuteisrequired.Makesureto
have it available for the start-up of the system.
REFRIGERANT LINES
Inner diameter of refrigerant lines going from
condensing unit to evaporator unit and back,
must be of adequate size in relation to tubing
lenght.
Thetablebelowshowtherecommendedsizesof
refrigerant lines:
MODELL Lenght of tubes Suction line Liquid line
MAR 78 5 to 15 mt 18 mm 12 mm
MAR 108 5 to 15 mt 18 mm 12 mm
MAR 128 5 to 15 mt 18 mm 12 mm
MAR 208 5 to 15 mt 28 mm 12 mm
MAR 308 5 to 15 mt 42 mm 12 mm
2. Insulate lines that will be exposed to outside
temperature that will be below freezing for
extended period of time.
3. Follow straight line routing, when possible,
howevergivetothesuctionlineacertainpitch
(2 cm per meter).
Onliquidlinebesuretodonothaverestrictions.
Bends and fittings should be the minimum
necessaryastheycanincreasetheresistance
to the fluid flow.
4. To prevent any condensing unit vibration
travelling into the lines, vibration absirbers
may be installed in the suction and the liquid
lines near the condensing unit.
Because the appearence of an installation is
important, the piping should be put-in as
neathly as possible.
Forbest sound absorb-tion, it isbest to put-in
two absorbers in each line, one vertically and
one horizontally.
For evacuation and charging operations two
service valves must be provided.
One on the liquid line and one on the suction
line.
5. A drier and a sight glass should be installed
in the liquid line at the condensing unit.
HYDRAULIC CIRCUIT
Anotheritemthatrequiresapreliminarlyattenzion
for the MAR SPLIT installation is the water
supply to the ice making section and to the
condensingunitcaseawatercooledcondenser
is being used. Separate water linea are
recommendedwithhandshut-offvalveandwater
filter on individual line.
Remember:
– Maximum Water Temperature 35°C
– Minimum Water Temperature 5°C
– Minimum Water Pressure 1 atm
– Maximum Water Pressure 5 atm
The Ice Making Section (MAR SPLIT UNIT)
generally requires:
– 21 lt/hr MAR 78
– 29 lt/hr MAR 108
– 42 lt/hr MAR 128
– 70 lt/hr MAR 208
– 91 lt/hr MAR 308
of constant water supply.
The water consumption of the water cooled
condenser (in case of water cooled condensing
unit) to be taken on account, with water inlet
temperature at 15°C is:
– 300 lt/hr MAR 78
– 480 lt/hr MAR 108
– 1200 lt/hr MAR 128
– 1500 lt/hr MAR 208
– 1600 lt/hr MAR 308
For installation on fishing vessels, using
seawater, to carry sea water from sea chest to
the condensing unit and to evaporating unit
through appropriate strainers, you may use
aluminium brass pipes or PHE plastic pipes to
avoid corrosion problems.
Never use copper tubes.
ICE STORAGE ROOM
Ice storage situations are of two kinds:
a) Short terms storage
b) Extended terms storage
Being, as stated scale ice made by MAR
machinesflat,dryandsubcooled,thereforewith
the tendency to stick toghether, particular
attention is required for proper ice storage
conditions for better ice handling. An insulated
ice storage bin or room is always required, then
accordingtoiceenduseapplication,thiscanbe
refrigerated or non-refrigerated.

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Alsoaweightvolumeratioof2.1cm. mt. per ton,
must be taken into consideration for correct ice
storage.
a) Non-refrigerated room for short term
storage
The scale ice is produced continuously for 24
Hours per day, whereas the use period is
generally for no longer than 8 hours per day.
Thereforestoragefacilitiesshouldbeprovided
to accomodate a minimum of 16 hours of
production, this means that every MAR ice
machine must be installed with a properly
insulated storage room which should have a
minimum capacity of 2/3 the daily ice
production.
Withawellinsulatedroomanddulysubcooled
scaleice,thelimitedlossesofheatthroughthe
walls of a properly designed room with
adequate arrangements, are largely offset,
and excess melting will not occur. In most
situationswherewholequantityoficeproduced
isbeingusedonadailybasis,itisnotnecessary
to provide cooling for the ice storage room.
b) Refrigerated room for extended storage
and long distance conveying
When scale ice is to be transported at a
considerabledistance,suchasaboardfishing
vessels, or in locations with normal ambient
temperatures conditions, or when used in
industrialplantswheredemandisintermittent,
its subcooling power must be preserved
absolutely in the storage bin by a proper
cooling system keeping air temperature at a
pre-establishedandconstantvalue.Theideal
icestorageroomisthetypewithmechanically
refrigerated jacket space surrounding the ice
bin.
Goodpracticecallsforanicestoragecapacity
of about two times the daily ice machines
production with an inside temperature of -6°C
minimum (20°F).

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NON REFRIGERATED ICE STORAGE ROOM 1 Condensing unit
2 Liquid line
3 Evaporator drum unit
4 Suction line
5 Power supply line
6 Hand disconnect switch
7 Water supply line
8 Hand shut-off valve
9 Water filter
10 Condenser water inlet
11 Condenser water outlet
12 Evaporator water supply
13 Water drain line
14 Liquid line service valve
15 Suction line service valve
REFRIGERATED ICE STORAGE ROOM
(Jacket system) 1 Condensing unit
2 Liquid line
3 Evaporator drum unit
4 Suction line
5 Power supply line
6 Hand disconnect switch
7 Water supply line
8 Hand shut-off valve
9 Water filter
10 Condenser water inlet
11 Condenser water outlet
12 Evaporator water supply
13 Water drain line
14 Refrigerant coil
15 Insulated panel
16 Air gap
17 Ice bulkhead

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MAR 78-108-128 MAR 208-308
mm (inch) mm (inch)
A 621 (24.45) 661 (26.02)
B 876 (34.48) 1296 (51.03)
C 520 (20.38) 520 (20.38)
D 813 (32) 853 (33.58)
E 231 (9.09) 440 (17.32)
F 3/4" GAS 28 mm
G 3/8" GAS 1/2"
UNIT LAYOUT AND OVERALL DIMENSIONS
AB
C
D
E
F
G

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SECTION II
INSTALLATION
MAR SPLIT UNIT - UNPACKING AND
INSPECTION
1. Visually inspect the exterior of the shipping
container and skid and any severe demage
notedshouldbereportedtothedeliverycarrier;
and a concealed damage claim filled subject
to internal inspection with carrier represen-
tative present.
2. Remove the packing and remove the side
panelstounloosetheshippingboltssecuring
the unit to the skid.
3. Remove screw and all panels from cabinet
andinspectforanyconcealeddamage.Notify
carrier of any concealed damage claims as
stated in step 1 above.
4. Remove all internal packing from unit
compartment.
5. Check that refrigerant lines do not rub or
touch lines or surfaces and that all wires are
securely fastened to their terminals.
6. Use clean damp cloth or disposable paper
wipertowipeclean theexteriorsurfaceofthe
cabinet.
7. See DATA PLATE on the cabinet base and
check that the location source voltage
correspondswiththevoltagespecifiedonthe
dataplate.
CAUTION - Unproper voltage supplied to
the icemaker will void your parts
replacement programm.
MAR SPLIT UNIT - LOCATION AND
LEVELLING
1. PositiontheMARSPLITUNITintheselected
permanent location which could be on top of
ice storage cabinets, on the side of cold
storage room supported by special pre-set
standsor,incaseoffishingvesselinstallation,
inside or on top of the fish hold.
2. After having placed the unit on the support
stand,levelthecabinetonboththelefttorigh
and front to rear directions, by inserting
between the unit base and a support stand
few rubber pads. Fit in unit base holes in the
cabinet, appropriate bolts to fasten unit to
stand.
Makesuretoleaveenoughspacearoundthe
unit to allow access to internal components
for inspection and servicing and also for the
fitting of the ice chute if needed.
3. Proceed to position the condensing unit in its
location and to mount it firmly to avoid a
suddenshiftthatwouldendagertherefrigerant
lines. Precautions to be observed vary with
the kind of situation in which the unit is to be
placed. The area should be well ventilated to
permit escape of refrigerants in case unit
develops a leak.
MAR SPLIT UNIT - REFRIGERANT PIPING
CONNECTION
Fitting sizes:
Liquid Line Suction Line
MAR 78-108-128 3/8" Gas 3/4" Gas
MAR 208 1/2" Gas Ø 28 mm
MAR 308 1/2" Gas Ø 42 mm
Take extreme care to keep refrigeration tubing
clean and dry prior to installation.
Following procedure should be followed:
a) Donotleavedehydratedcompressororfilter-
drieropentotheatmosphereanylongerthan
itisabsolutelynecessary.(Oneortwominutes
maximum suggested).
b) Use only refrigeration grade copper-tubing,
properly sealed against contamination.
c) Permanent suction lines filters and liquid line
filter-driers are recommended in all filled
installed system.
d) When brazing refrigerant lines, an inert gas
should be passed through the line at low
pressure to prevent scaling and oxidation
inside the tubing. Dry nitrogen is preferred.
e) Line connection to vibration eliminators be
made with silver solder alloy.
Arrange that refrigerant lines run along the walls
andcellingsandbesupportedatintervalsfrequent
enough to keep tubing atraight and firmly in
place. In all cases the tubing should be run
horizontallyandverticallywithneatlookingbends
of as perfect radius as possible.
The liquid line presents no difficulties as to its
slandandposition,butyoumustinstallthesuction
linesothetubingwilldraintowardthecompressor.
Duringpreparationofliquidlinetakethenecessary
measuretoinstallafterevacuationofsystem,the
filter-drierofsuitablesizeforconstantoperation.
Youmayaswellconsidertoinstallonsuctionline
a suction tube filter, specially if the required
cleaness cannot be guaranteed.
After all lines are connected, the entire system
must be leak tested.
The complete system should be pressurized to
no-morethan12-13atm.withrefrigerantanddry
nitrogen or dry CO2for being leak tested by
means of an electronic type leak detector.

Page 17
Page 17
For pressurizing, evacuating and charging the
system, two service valves are necessary; one
should be in the Suction Line at the inlet side of
suctionfilterandoneshould be in theLiquidLine
at the outlet side of filter dryer.
The two Service Valves, if properly capped can
be left permanently in the system. Connection
should be 3/8" or 1/2" size.
MAR SPLIT UNIT - WATER PIPING
CONNECTIONS (PLUMBINGS)
MAR SPLIT UNIT is supplied with float valve in
position to maintain the water level in drum
reservoir at the height required for fresh water
operation or if required, for sea water operation.
Waterinletline mustgodirectlytofloatvalveline
fitting of 3/4" gas, (copper tube is not
recommended for sea water supply) also make
sure to fit on this same a hand shut-off valve
closeenough toMAR unit and a proper kind and
size of filter strainer.
Incomingwatergeoesthroughthefloatreservoir
first and then to drum basin.
Outletwaterlineshouldbeshapedadequatelyto
drain by gravity any water passing through it.
Wateroutletfittingfromfloatreservoirrequires a
20 m/m I.D. water hose.
All plumbing connections should be made in
accordance with local plumbing codes.
WATER AND REFRIGERANT CIRCUIT - SPLIT UNITS
1. Liquid line
2. Heat exchanger
3. Automatic expansion valve
4. Suction line
5. Water inlet
6. Float valve
7. Water basin
8. Evaporation drum
9. Scraping blade
10. Water pump
11. Spray bar
12. Water tube - Pump / spray bar
13. Liquid line valve

Page 18
Page 18
MAR SPLIT UNIT - ELECTRICAL
CONNECTION
Thesupplypower, voltagefrequencyandphase
must coincide with unit nameplate. MAR Split
units are internally wired and ready for field
wiring connections which must be made in
accordancewithanylocalcodesthatmayapply.
Wires should be of adequate size to handle the
connected load, individually fused (see
specificationsatpage5)andprovidedwithground
line.
Themaximumallowablevoltagevariation,should
not exceed ten percent of the nameplate rating,
even under starting conditions.
Low voltages can cause erratic operation and
may be responsible for serious damages to the
overload switch and motor windings.
Make the necessary steps so that the MAR Split
Unit be electrically connected to the condensing
unit control box contactor as illustrated on the
following wiring diagrams representing three
different electric supply line situation which are
respectively. 230/50/3 or 400/50/3-N.
WARNING - Correct Drum rotation - The
evaporator drum drive motor being a
threephase motor wired for 380 V. It is of
estremeimportancetocheckimmediately
upon unit start-up that motor rotates
CLOCKWISE in order that gear motor
pulley rotates in the direction of the
ARROWonitindicated.Shouldthemotor
turn counterclockwise, it is necessary to
instantly switch-off the unit and
interchangeonepolarityatterminalblock
connection at main electric cord.

Page 19
Page 19
INSTALLATION PRACTICE SPLIT
UNIT ASHORE 1 Condensing unit
2 Liquid line
3 Evaporator drum unit
4 Suction line
5 Power supply line
6 Hand disconnect switch
7 Water supply line
8 Hand shut-off valve
9 Water filter
10 Condenser water inlet
11 Condenser water outlet
12 Evaporator water supply
13 Water drain line
INSTALLATION PRACTICE SPLIT UNIT
ON OFFSHORE FISHING VESSEL 1 Deck house
2 Control panel & main switch
3 Ice chute
4 Evaporator drum unit
5 Ice hold
6 Fishing room
7 Réfrigérant lines
8 Condensing unit
9 Engine room

Page 20
Page 20
MAR SPLIT IN MULTIPLE INSTALLATION
Inmultipleinstallationvarioustypesofcommercial
refrigerating equipment are connected to the
samecondensingunit,whichisnormallylocated
in the machine room, as often occurs in
supermarkets.
MAR SPLIT can be one of the refrigerant units
connected to a multiple use condensing unit.
Inthis kind ofinstallation it willbe best toreplace
the standard AEV refrigerant control with a
corresponding size AMXV control, which, in
relationtothemultipleinstallationsituations(great
evaporating temperature difference) could be of
two temperature type.
Also a manifold with hand shut-off valves on
both liquid and suction line is recommended for
these installations.
In many multiple installations check valves are
putinthesuctionlineofthecoldestevaporatorto
prevent that warmer higher pressure low-side
vapormovesintocolderevaporatorduringtheoff
periods.
Also a pressure control valve is installed on
MAR SPLIT suction line to maintain constant
pressure on evaporator drum.
Therefore,fortheMARSPLITmultipleinstallation
you may need:
1. Automatic Expansion valve
Theautomaticexpansionvalveistheleading
multipleevaporatorsystemrefrigerantcontrol
as it does not regulate the low side pressure,
but,rathercontrolthefilling of the evaporator
with refrigerant, it is important to use a valve
for the correct capacity.
2. Solenoid valve
Two-waystypetobeconnectedinserieswith
anyMARSPLITprotectingandstartingdevice.
3. Pressure Control valve
OntheMARSPLITsuctionline.Itwillmantain
constantpressureonMARSPLITevaporator
drum.
4. Manifold with hand shut-off valve
One to be placed on the liquid line and the
other on suction line to isolate MAR SPLIT
unit when necessary.
Installation of MAR SPLIT in multiple system
should be done in the following order.
1. Put MAR SPLIT unit in place.
See Sec. II Location & Levelling.
2. Install valves and controls.
3. Install tubings.
See Sec. II Refrigerant piping connections.
4. Make water piping connections.
See Sec. II Plumbing.
5. Make electrical connections
See Sec. II Electrical connections.
6. Check for leaks.
See Sec. II Leak Test.
7. Dehydrate installation.
See Sec. III Evacuation / Charging.
8. Start unit.
See Sec. III Operazional Check-out.
TYPICAL NON-CODE COMMERCIAL INSTALLATION
1. Power line
2. Main switch
3. Relay / Starter
4. Suction line shutoff valves
5. Liquid line shutoff valves
MAR SPLIT ICE MAKER
DISPLAY CASE
MEET ROOM
CONDENSING UNIT