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Icematic N21 User Manual

Icematic N21
16 pages
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Cod. 71503341/0 - 3/00 - GB
OUR SYSTEMS CONFORM TO EC STANDARD 73/23 CEE - 89/336
SERVICE MANUAL
N21
AUTOMATIC CUBERS
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Icematic N21 Specifications

General IconGeneral
BrandIcematic
ModelN21
CategoryIce Maker
LanguageEnglish

Summary

General Information and Installation

Introduction

Provides specifications and step-by-step procedures for installation, startup, operation, maintenance, and cleaning of icemakers.

Unpacking and Inspection

Details procedures for safely unpacking the icemaker, inspecting for shipping damage, and reporting any issues to the carrier.

Location and Levelling

Specifies criteria for selecting an appropriate location, including ambient temperature, water inlet temperature, ventilation, and service access.

Electrical Connections

Outlines requirements for electrical connections, including grounding, circuit protection, voltage compatibility, and adherence to local standards.

Water Supply and Drain Connections

Provides guidance on selecting water supply, considering run length, clarity, purity, and pressure, and proper drain connections.

Final Check List

A comprehensive checklist for verifying all installation steps, electrical and plumbing connections, and operational readiness before use.

Installation Practice

Illustrates key installation components and practices, including shut-off valves, filters, fittings, and drain configurations.

Operating Instructions

Start Up

Guides the user through the initial startup procedure, including power connection and verification of water filling during the defrost cycle.

Operational Checks

Details checks to perform during the initial cycles, including spray system seating, water distribution, and proper functioning of components.

Principle of Operation

Freezing Cycle

Explains the process of refrigerant circulation, heat exchange, and ice formation within the evaporator during the freezing phase.

Defrost or Harvest Cycle

Describes the defrost phase where hot gas melts ice, releasing it for harvest, and the critical components involved.

Operation - Control Sequence

Details the sequence of operations controlled by the evaporator thermostat and timer, managing freezing and defrost cycles.

Operation - Electrical Sequence

Illustrates the ON/OFF status of electrical components during different phases of the icemaking cycle.

Operating Characteristics

Presents typical operating pressures and compressor amp characteristics for both air-cooled and water-cooled models.

Components Description

Evaporator Thermostat

Senses evaporating refrigerant temperature to control the freezing cycle duration and activate the harvest phase.

Bin Thermostat

Shuts off the icemaker when the ice storage bin is full, preventing overflow and ensuring proper operation.

Timer

Manages the duration of freezing and harvest cycles, adjustable to control ice cube size and defrost timing.

Hi Pressure Control

Maintains head pressure in water-cooled models by regulating condenser water flow.

Hi Temperature Safety Thermostat (Water air cooled models)

Shuts off the icemaker if the liquid line temperature exceeds the safety limit of 65°C.

Water Spray System

Consists of a spray bar with multiple nozzles that distribute water over the evaporator for ice formation.

Water Pump

Circulates water from the sump to the spray nozzles for ice production throughout the freezing cycle.

Water Inlet Solenoid Valve - 3/4 Male Fitting

Activates during the defrost cycle to supply metered water for assisting hot gas in melting ice cubes.

Hot Gas Solenoid Valve

Directs hot gas from the compressor into the evaporator serpentine to defrost formed ice cubes during the harvest cycle.

Fan Motor (Air cooled version)

Draws cooling air through condenser fins during the freezing cycle to maintain proper condensing pressure.

Water Inlet Solenoid Valve - 3/4 Male Fitting N 21 (water cooled version)

Supplies metered water to the condenser in water-cooled models to control temperature and refrigerant pressure.

Water Regulating Valve (Water cooled version)

Controls head pressure by regulating the flow of cooling water to the condenser.

Compressor

The hermetic compressor circulates refrigerant, compressing vapor to high pressure and temperature.

Service Diagnosis

Troubleshooting Unit Issues

Diagnoses common symptoms like unit not running, intermittent compressor cycling, and small ice cubes with suggested corrections.

Troubleshooting Ice Quality

Addresses issues like cloudy cubes and short water supply, providing potential causes and remedies.

Troubleshooting Ice Production

Covers problems like irregular cube size, decreased ice capacity, and poor harvest with corresponding solutions.

Troubleshooting Pressure and Water Issues

Diagnoses incorrect discharge pressure, excessive water in the base, and other related operational faults.

Maintenance and Cleaning Instructions

General Maintenance Guidelines

Provides general advice on maintenance frequency, local condition variability, and individual icemaker requirements.

Icemaker Maintenance Schedule

Outlines essential maintenance tasks to be performed at least twice a year, including checking water lines, leveling, and cleaning.

Cleaning Instructions of Water System

Details the step-by-step process for cleaning the water system, evaporator, bin, and spray jets using a cleaning solution.

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