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Scotsman NWH Series - User Manual

Scotsman NWH Series
155 pages
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NW(H) SERIES
DICE & HALFDICE
CUBERS
TECHNICAL SERVICE TRAINING
Welcome to another Scotsman Technical Service Presentation that
cover all NW models
REV. 03/2018
Full Cube 12 gr Half Cube 6 gr
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Summary

Unpacking Procedures

Initial Machine Unpacking

Inspect the carton box and wooden base conditions before removing securing strips and tape.

Removing Machine Panels

Visually inspect the machine exterior, remove front/side panels and base securing screws.

Removing Internal Components and Tapes

Remove hoses, adhesive tapes, air baffle deflector, and ice thickness sensor tape.

Storage Bin and Contents Unpacking

Unpack the storage bin, inspect its exterior, and remove internal contents like legs and hoses.

Installation Guide

Installing Legs and Drain Tube

Install the four adjustable legs and their leveling nuts on the bottom base, along with the water drain tube.

Securing the Ice Machine to the Bin

Install the ice machine on top of the storage bin and secure it with side screws.

Airflow Management and Clearances

Install air baffle, manage clearances, and attach top grids for specific NW models for proper ventilation.

Connecting Utilities and Leveling

Check data plate, conditions, connect utilities, and level the unit using adjustable legs.

Start Up and Operational Checks

Initial Power and Water Turn-On

Open the water tap/valve and switch on the electrical supply line to initiate the startup process.

Automatic Clean and Pressure Balance

Machine performs an automatic clean cycle for reservoir rinsing and enters pressure balance mode.

Compressor Crankcase Heater Operation

Explains the NW 1008 crankcase heater delay and its bypass mechanism.

Freezing and Harvest Cycle Initiation

Machine enters freezing, then harvest cycles based on ice thickness and bin status.

Operating Principles and Components

Refrigerant System Operation

Diagrams illustrate refrigerant flow during freeze and harvest cycles.

Water System Cycle Functions

Diagrams show water system operations during freezing and harvest phases.

Key Refrigerant System Components

Identifies Compressor, Condenser, Evaporator, TXV Valve, Drier, Hot Gas Valve, High Pressure Ctrl.

Key Water System Components

Identifies Water Inlet Valve, Sump, Pump, Distributor Tube, Flow Adjusters, Drain Valve.

Electronic Control System Components

Identifies PC Board, Ice Thickness Sensor, Condenser Sensor, Magnet, Magnetic Switch, Water Level Sensor.

Maintenance Procedures

Maintenance Schedule and Tools

Overview of maintenance frequency (monthly sanitizing, bi-monthly cleaning) and required tools.

Machine Shutdown and Disassembly

Steps to safely shut down the machine, prepare the bin, and disassemble internal water system parts.

Water System Cleaning and Sanitizing

Detailed process for cleaning the water system, including solution preparation and cycle execution.

Bin Interior Hygiene Procedures

Regular sanitization of the ice bin interior to prevent bacterial accumulation.

Reassembly and Air Filter Check

Reassemble cleaned parts, check ice batch quality, and clean the rear air filter.

Service Analysis and Troubleshooting

Ideal Dice Cube Characteristics

Defines the ideal Scotsman Dice cube appearance: clear, solid, with specific rim and depression.

Ice Thickness Sensor Calibration

Adjusting the ice thickness sensor clearance to ensure proper freezing cycle length and cube size.

Ice Size Variation Troubleshooting

Explains how freezing cycle length affects ice cube size and how to adjust the sensor.

Uneven Ice Formation Diagnosis

Identifies uneven ice formation due to clogged spray jets and suggests cleaning the spray bar.

Factors Affecting Ice Quality

Reasons for ice quality issues like oversized/undersized cubes due to TXV or refrigerant charge.

Refrigerant System Pressure Analysis

Checking operating pressures and identifying potential TXV valve or serpentine welding issues.

Scotsman NWH Series Specifications

General IconGeneral
MaterialStainless Steel
Ice TypeNugget Ice
Storage CapacityVaries by model
Water ConnectionRequired
RefrigerantR404A
Power ConsumptionVaries by model
Dimensions (H x W x D)Varies by model
WeightVaries by model

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