Scotsman MAR 76 User manual

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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 56
MAR 76
MAR 106
MAR 126
MAR 206
MAR 306
Scale ice machines
MS 1000.66 - REV. 06/2018

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FOREWORD
The "MAR" ice makers make flake ice of "scale"
typewhichisflat,harddryandsub-cooled,giving
to it an exceptional staying power for multiple
chilling operations.
Thedesignsimplicityaccountsfortheconfidence
in MAR scale ice machines. Their ice making
systemhasonlyonesealedmovingpart,resulting
in a minimum of maintenance operations for
continuous reliable machine service.
Ice is discharges through a large opening on the
backofunitcabinet,whenmountedontopofthe
refrigerated room, ice is gravity fed to storage
area.
Rugged, solid, heavy duty, the stainless steel
MAR cabinet has removable panels that facilita-
te the accessibility to mechanical and electrical
parts. A console panel with lights monitoring
water flow pressure, and temperature operating
refrigerant pressure and motors overloading
forewornthesystemmalfunctionbeforebecoming
major trouble.
We suggest you to take time now to read this
manual which contains a lot of valuable
informations on the MAR ice making system.
Ifyouhaveanyfurtherqueriesregardingthecare
or operation of the machine, please contact:
NOTE: Whenever writing please state model no. and serial no. of the machine
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]
®

TABLE OF
CONTENTS
Foreword page 2
Table of contents 3
Specifications - MAR 56 - 76 - 106 - 126 4-5-6
Specifications - MAR 206 - 306 7-8
Remote cond. 9
Section I GENERAL INFORMATIONS & INSTALLATIONS
Description 10
Unpacking & Inspection 10
Location & Levelling 11
Electrical connections 12
Water supply & Drain connections 12
Remote air cooled condenser installation 13
Ice level control 14
Ice chute 15
Final check list 15
Unit installation practice 15-16
Section II OPERATING INSTRUCTIONS
Start-up 17
Water & Refrigerant circuit 18-19
Section III PRINCIPLES OF OPERAZION - HOW IT WORKS
Ice maker 20
Electrical / Refrigeration 21-22-23
Refrigerant charge 24
Mechanicals 24
Section IV ADJUSTMENT & REMOVAL & REPLACEMENT
PROCEDURES
Water regulator assy 25
Automatic expansion valve 25
V Belt change on pulley 25
Compressor replacement 25
Water cooled condens. replacement 26
Water regulator replacement 26
Drier replacement 26
Drive motor replacement 27
Gear Box replacement 28
Fiber key replacement 28
Section V MAINTENANCE & CLEANING INSTRUCTIONS
General 29
Ice maker 29
Cleaning instruction 29-30-31-32
Section VI SERVICE DIAGNOSIS
Ice making - Refrigerant system 33-34
Section VII WIRING DIAGRAMS 35
MAR 56-76-106-126 - Wiring diagram 36÷38
MAR 206-306 - Wiring diagram Fig. 1 e 2 39÷42

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SPECIFICATIONS
NOTE. Daily ice capacity is directly related to condenser air water inlet temperature, water
temperature to make ice - and age of machine.
To keep your SCOTSMAN MAR performing at is maximum capacity, it is necessary to perform
periodic maintenance as outlined on page 29 of this manual.
MAR 56
AIR & WATER COOLED MODELS
THICK SCALE ICE
THIN SCALE ICE
ice making capacity
500
450
400
350
300
250
200
Kg./24 h
38 °C
32 27 21 15
°C
10
21
32
38
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
WATER COOLED MODELS
10 5
10
21
500
450
400
350
300
250
200
Kg./24 h
38 °C
32 27 21 15
°C
DE 10 A' 38
o
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10 5
MAR 76
AIR & WATER COOLED MODELS
ice making capacity THICK SCALE ICE
THIN SCALE ICE
AIR COOLED MODELS
540
500
460
420
380
340
300
Kg./24 h
38 °C
32 27 21 15
°C
o
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10 5
10
21
32
38

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SPECIFICATIONS
NOTE. Daily ice capacity is directly related to condenser air water inlet temperature, water
temperature to make ice - and age of machine.
To keep your SCOTSMAN MAR performing at is maximum capacity, it is necessary to perform
periodic maintenance as outlined on page 29 of this manual.
MAR 106
AIR & WATER COOLED MODELS
THICK SCALE ICE
THIN SCALE ICE
ice making capacity
MAR 126
AIR & WATER COOLED MODELS
ice making capacity THICK SCALE ICE
THIN SCALE ICE
AIR COOLED MODELS
750
700
650
600
550
500
450
Kg./24 h
38 °C
32 27 21 15
°C
o
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10 5
10
21
32
38
WATER COOLED MODELS
800
750
700
650
600
550
500
Kg./24 h
38 °C
32 27 21 15
°C
DE 10 A' 38
o
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10 5
AIR COOLED MODELS
1000
950
900
850
750
650
600
Kg./24 h
38 °C
32 27 21
°C
o
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10
21
32
38

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MAR 56-76-106-126 - SPECIFICATIONS
BASIC ELECTRICALS: 400/50/3N
* at 21 °C amb. / 15 °C water temp.
Water req. (l/h) Total Amps.
MODELS Finish
* Cond. Prod. 400 V kg. lbs.
MAR 56 AS Air 2 16 2.2 5 x 1.5 2.7 Stainless 194 427
MAR 56 WS Water 2 225 16 2.2 5 x 1.5 2.7 Steel 174 383
MAR 76 AS Air 2.5 21 2.5 5 x 1.5 2.7 Stainless 204 450
MAR 76 WS Water 2.5 300 21 2.5 5 x 1.5 2.7 Steel 201 442
MAR 106 AS Air 4 30 3.5 5 x 1.5 5 Stainless 221 487
MAR 106 WS Water 4 480 30 3.5 5 x 1.5 5 Steel 217 417
MAR 126 AS Air 4.5 41 4.5 5 x 1.5 6.5 Stainless 226 497
MAR 126 WS Water 4.5 41 4.5 5 x 1.5 6.5 Steel 222 488
Cond. Compr. Power Minimum
Unit (HP) (KW) wire size (mm)
Shipping weight

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SPECIFICATIONS
NOTE. Daily ice capacity is directly related to condenser air water inlet temperature, water
temperature to make ice - and age of machine.
To keep your SCOTSMAN MAR performing at is maximum capacity, it is necessary to perform
periodic maintenance as outlined on page 29 of this manual.
MAR 206
AIR & WATER COOLED MODELS
ice making capacity THICK SCALE ICE
THIN SCALE ICE
1700
1600
1500
1400
1300
1200
1100
Kg./24 h
38 °C
32 27 21 15
°C
32
38
AIR COOLED MACHINES
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
WATER COOLED MACHINES
10 5
10
21
1900
1800
1700
1600
1500
1400
1300
Kg./24 h
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
MAR 306
AIR & WATER COOLED MODELS
ice making capacity
2600
2400
2200
2000
1800
1600
1400
Kg./24 h
38 °C
32 27 21 15
°C
32
38
AIR COOLED MACHINES
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32
38
WATER COOLED MACHINES
10 5
10
21
2800
2600
2400
2200
2000
1800
1600
Kg./24 h
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
THICK SCALE ICE
THIN SCALE ICE

MAR 206-306 - SPECIFICATIONS
BASIC ELECTRICALS: 400/50/3N
* at 21 °C amb. / 15 °C water temp.
Water req. (l/h) Total Amps.
MODELS Finish
* Cond. Prod. 400 V kg. lbs.
MAR 206 AS Air 5 69 7 5 x 2.5 17 Stainless 374 824
MAR 206 WS Water 5 1200 72 7 5 x 2.5 10 Steel 369 813
MAR 306 AS Air 10 88 10 5 x 4 20 Stainless 383 844
MAR 306 WS Water 10 1600 94 10 5 x 4 20 Steel 413 910
Cond. Compr. Power Minimum
Unit (HP) (KW) wire size (mm)
Shipping weight
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CONDENSER CAPACITY FAN MOTOR AIR FLOW
20 KW - 17200 Kcal/h 230/50/1 V - 0,8 A 4320 m3/h
MAR 306 REMOTE CONDENSER
TECHNICAL SPECIFICATIONS

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SECTION I
GENERAL INFORMATION & INSTALLATION
1. DESCRIPTION
An attractive compact cabinet of stainless steel
with control panel lights on the front. All panels
are removable to allow easy access to electrical
and mechanical components for cleaning and
maintenance.
Sealed Refrigeration System
To provide quite efficient operation of the ice
maker, the compressor is mounted on rubber
cushions.Thewatercooledmodels haveatube
within tube condenser with water regulation val-
ve for correct condensing water flow. The air
cooledmodels,excepttheMAR306haveabuilt
in condenser in copper and aluminium with the
fan motor controlled by pressure control. The
evaporator drum is powered by a separate drive
motorconnectedbyaV-beltandpulleysystemto
adoublegearbox.TherefrigerantusedisR404a
controlled by automatic expansion valve.
Storage Bin or Ice Room
Since the MAR Scale is a continuous flow type
ice maker and does not have its own attached
storagebin,itisnecessarytouseanauxiliarybin
or a pre-fabricated ice room for appropriate ice
storage.
Ice storage situations are of two kinds:
a) Short term storage
b) Extended terms storage
Being, as stated, scale ice made by MAR
machinesflat, dry andsubcooled, therefore with
the tendency to stick toghether, particular
attention is required for proper ice storage
conditions for better ice handling. An insulated
icestoragebinor roomsisalwaysrequired,then
according to ice end use application, this can be
refrigerated on non-refrigerated.
Also a weight volume ratio of 2,1 cu. mt. per
ton, must be taken into consideration for correct
ice storage.
a) Non-refrigerated room for short term
storage.
Thescaleiceisproduced continuouslyfor24
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 scale 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
scale ice, the limited losses of heat throught
the 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 absolutely
preserved 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. Good practice calls for an ice storage
capacity of about two times the daily ice
machines production with an inside tempera-
ture of -6°C minimum (20°F).
2. UNPACKING AND INSPECTION
1. Call your authorized SCOTSMAN Distributor
od Dealer for proper installation.
2. Visually inspect the exterior of the shipping
container and skid and any severe damage
noted should be reported to the delivering
carrier; and a concealed damage claim filled
subject to internal inspection, with carrier
representative present.
3. Removethepackingandremovetheshipping
bolts and the shipping base or skid.
4. When necessary, install the leg levellers in
the cabinet base sockets; then, raise the
cabinet to the upright position.
5. Remove screws and shipping tapes and all
doorsandservicepanelsfromthecabinetand
inspect for any concealed damage.
Notifycarrierofanyconcealeddamageclaims
as stated in step 2 above.
6. Remove all internal support packing, tape
and wires in machinery compartment.
7. Check that refrigerant lines do not rub or
touch lines or surfaces and that fan blades, if
any, moves freely.
8. Checkthatcompressorissnugonallmounting
pads.
9. Use clean damp cloth or disposable paper
wiperto wipe clean theexterior surface of the
cabinet.