Table of Contents
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MAR 56
MAR 76
MAR 106
MAR 126
MAR 206
MAR 306
Scale ice machines
Scotsman Ice Srl
Via Lainate, 31 - 20010 Pogliano M.se - Milano - Italy
Tel. +39-02-93960.1 (Aut. Sel.)- Telefax +39-02-93550500
Direct Line to Service & Parts:
Phone +39-02-93960350 - Fax +39-02-93540449
Website: www.scotsman-ice.it
E-Mail: scotsman.europe@scotsman.it
SERVICE MANUAL
MS 1000.66 - REV. 06/2018
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Table of Contents
Related Manuals for Scotsman MAR 306
Summarization of Contents
SPECIFICATIONS
MAR 56
Details ice making capacity for MAR 56 air and water cooled models.
MAR 76
Details ice making capacity for MAR 76 air and water cooled models.
MAR 106
Details ice making capacity for MAR 106 air and water cooled models.
MAR 126
Details ice making capacity for MAR 126 air and water cooled models.
MAR 56-76-106-126 Detailed Specs
Provides dimensions, electrical data, and shipping weights for MAR 56-126.
MAR 206
Details ice making capacity for MAR 206 air and water cooled models.
MAR 306
Details ice making capacity for MAR 306 air and water cooled models.
MAR 206-306 Detailed Specs
Provides dimensions, electrical data, and shipping weights for MAR 206-306.
MAR 306 Remote Condenser
Technical specifications for the MAR 306 remote condenser.
SECTION I GENERAL INFORMATION & INSTALLATION
Description
Overview of the ice maker's attractive stainless steel cabinet and removable panels.
Storage Bin or Ice Room
Guidance on requirements for ice storage bins or rooms for MAR machines.
Unpacking and Inspection
Procedures for unpacking the unit and inspecting for shipping damage.
Location and Levelling
Guidelines for selecting a suitable location and ensuring the unit is level.
Electrical Connections
Instructions for proper electrical hook-up, including voltage and grounding.
Water Supply and Drain Connections
Details on water inlet, drain connections, and water quality requirements.
Remote Air-Cooled Condenser Installation
Procedures for installing the remote condenser and refrigerant lines.
Ice Level Control
Explanation of the thermostatic and timer-based ice level control systems.
Ice Chute
Information on the unit's ice chute and optional accessories.
Final Check List
A comprehensive list of checks before operating the ice maker.
Unit Installation Practice
Procedures for installing the unit in non-refrigerated and refrigerated ice rooms.
SECTION II OPERATING INSTRUCTIONS
Complete Unit Start-Up
Step-by-step guide for starting the ice maker, including initial checks.
Water and Refrigerant Circuit
Diagram and explanation of the unit's water and refrigerant flow.
SECTION III PRINCIPLES OF OPERATION - HOW IT WORKS
Ice Maker
Detailed explanation of the ice-making mechanism, including the drum and scraping blade.
Electrical / Refrigeration
Overview of electrical components and the refrigeration system.
Compressor Unit
Details on the compressor, including crankcase heater and thermal protection.
Drive Motor
Information on the three-phase drive motor for the evaporator drum.
Timer
Explanation of the timer's function for preset operation times.
Hi Pressure Cut-Out Hand Reset
Function of the safety control for high refrigerant pressure.
Water Failure Switch
Operation of the switch that cuts off the unit if water supply fails.
Lo-Pressure Cut-Out Automatical Reset
Function of the safety control for low refrigerant pressure.
Condenser Fan Motor
Details on the fan motors used in air-cooled units.
Fan Motor Pressure Control
Explanation of the control that maintains head pressure for fan motors.
Control Console
Description of the visual control console and warning lights.
Water Cooled Condenser
Description of the tube-within-a-tube water-cooled condenser.
Water Regulating Valve
Information on setting the water regulating valve for correct head pressure.
Automatic Expansion Valve
Explanation of the AEV's role in refrigerant flow and adjustment.
Evaporator Drum
Description of the evaporator drum construction and scraping blade clearance.
Refrigerant Seal System
Details on the leakproof joint for refrigerant inlet/outlet.
Heat Exchanger
Function of the heat exchanger in improving operating efficiency.
Sight Glass
How to check refrigerant level using the sight glass for bubbles.
Filter Drier
Information on the anti-acid filter drier installed in the liquid line.
Contactor
Description of the contactors used for system control.
Thermostat (Ice level control)
Function of the thermostat to control ice level in storage.
Ice Spout Safety Switch
Operation of the switch that stops ice making when ice backs up.
Ice Level Control
Alternative method using a sensing capillary to control ice production.
ON/OFF switch
Manual switch for starting or stopping the entire system.
Compressor Delay Timer
Timer that delays compressor start-up for 18 minutes.
Drum Rotation Delay Timer
Timer that delays drum stop for 18 minutes after unit trip-off.
3-phases Monitoring Relay
Relay that checks and ensures correct drive motor rotation.
Drum Rotation Control
System using Hall effect sensor to monitor drum rotation speed.
REFRIGERANT CHARGE
Refrigerant Charge and Operating Pressures
Table showing approximate refrigerant charge and operating pressures for different models.
MECHANICALS
Motor Shaft Pulley
How changing pulleys affects drum speed and ice thickness (THICK vs. THIN).
V Belt
Guidelines for adjusting V-belt tension and alignment for optimal performance.
Gear Reducer
Description of the gear reducer, its ratio, and maintenance requirements.
SECTION IV ADJUSTMENT & REMOVAL & REPLACEMENT PROCEDURES
Adjustment of the Water Regulator Assy
Procedure for adjusting the water regulator to increase or decrease head pressure.
Adjustment of the Automatic Expansion Valve
How to adjust the AEV for proper evaporator drum frosting.
Changing V Belt
Step-by-step guide for changing the V-belt to produce thin ice.
Removal and Replacement of the Compressor Assembly
Detailed steps for removing and replacing the compressor unit safely.
Removal and Replacement of the Water Cooled Condenser
Procedures for safely removing and installing the water-cooled condenser.
Removal and Replacement of the Water Regulator Assembly
Steps for removing and replacing the water regulator assembly.
Removal and Replacement of the Drier
Instructions for removing and replacing the filter drier, emphasizing moisture control.
Instructions for Refrigerant Mechanisms
General instructions for handling refrigerant system components during R&R.
Removal and Replacement of the Drive Motor
Detailed steps for removing and replacing the drive motor assembly.
Removal and Replacement of Gear Box
Procedures for removing and installing the gear box.
Replacement of Fiber Keys
Guide for replacing fiber keys when they break, ensuring proper drive engagement.
SECTION V MAINTENANCE & CLEANING INSTRUCTIONS
General Maintenance Guidelines
General advice on maintenance periods and site-specific requirements.
Icemaaker Maintenance Checks
Specific checks to perform on the ice maker unit for optimal function.
Cleaning Instruction (MAR 56-76-106-126)
Detailed cleaning procedures for MAR 56, 76, 106, and 126 models.
Cleaning Instruction (MAR 206-306)
Detailed cleaning and sanitizing procedures for MAR 206 and 306 models.
SECTION VI SERVICE DIAGNOSIS
Ice Making - Refrigeration System
Troubleshooting chart for common ice making and refrigeration system symptoms and corrections.
SECTION VII WIRING DIAGRAMS
Wiring Diagram - MAR 56-76-106-126
Electrical schematic illustrating the wiring for MAR 56, 76, 106, and 126 models.
Wiring Diagram - MAR 206-306
Electrical schematic illustrating the wiring for MAR 206 and 306 models.
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