Ice-O-Matic EF Series Remote System, Remote Condenser, Mixing Valve L.A.C., Headmaster

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Air Flow

Flake Ice Machines

Refrigeration System

Remote System

Machines that use remote condensers have several components that are not used in self contained machines. A mixing valve controls the head pressure when the ambient temperature at the condenser drops below 70°F (21°C). When the bin fills with ice or is turned off at the selector switch, the machine will pump all the refrigerant into the receiver before shutting off.

Remote Condenser

For proper operation, the remote condenser must be installed properly. Improper installation will void the warranty. See remote guidelines on page A10. The location of the remote condenser should be such that the ambient air temperature does not exceed 120°F (48.9°C). If ambient temperature exceeds 120°F (48.9°C) ice production will decrease until the ambient temperature decreases.

If the airflow is restricted or the condenser is dirty, the head pressure will be excessively high, slow production will result and the compressor may overheat and eventually become damaged. The condenser coil and fan blades must be kept clean. The condenser can be cleaned with

compressed air or by using a brush. If a brush is used, brush in the direction of the fins taking care not to bend the fins. If the condenser fins are bent, this will restrict the airflow through the condenser and the fins will need to be straightened with a fin comb. Problems related to a dirty condenser or poor airflow will not be covered under warranty. Note: The condenser fan motor runs continually, it will shut off when the icemaker shuts off.

Mixing Valve (L.A.C., Headmaster)

When the temperature at the condenser is above 70°F (21°C), the refrigerant flow from the compressor is directed by the mixing valve through the condenser and into the receiver. When the temperature at the condenser drops below 70°F (21°C), the pressure in the bellows of the mixing valve becomes greater than the pressure of the liquid refrigerant coming from the condenser. This change allows the valve to partially restrict the flow of refrigerant leaving the condenser and allows discharge gas to by-pass the condenser and flow directly into the receiver, mixing with the liquid refrigerant from the condenser. The amount of discharge gas that bypasses the condenser increases as the ambient temperature decreases. This action of the mixing

valve allows the discharge pressure to be maintained at approximately 240 psi (16.5 bar) during low ambient conditions. If the refrigerant system is undercharged and the ambient temperature is below 70°F (21°C), the mixing valve will not work properly. The mixing valve will allow too much refrigerant to bypass the condenser.

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Contents Service and Installation Manual Page Flake Ice Machines Table Of ContentsHow To Use This Manual General Information Model and Serial Number Format Model Numbers EF 80 0 aSerial Number Date Code Page RLA LRA Electrical and Mechanical SpecificationsDrains Installation Guidelines Ambient Operating TemperaturesElectrical Specifications AdjustmentsEF Series EMF Series EMF Series 48 Inch Wide A10 ICE-O-Matic Parts and Labor Domestic & International Limited WarrantyEvaporator Float Gear Reducer Belt Auger Motor General OperationMaintenance Procedure Scheduled MaintenanceCleaning and Sanitizing Instructions Winterizing Procedures Winterizing ProceduresCleaning Activity Cleaning Agent Cabinet CareMethod of Application How To Use The Troubleshooting Trees Troubleshooting TreesMachine Runs, Does Not Make Ice Flake Ice Machines Machine Does Not Run Slow Production Low Production High Suction Pressure Machine Freezes Up Auger Seizes Auger Motor Amp Draw Fluctuates Water Leaking From Bottom of Evaporator Machine Produces Wet Ice C12 Noise Coming from Evaporator Water System Water SystemFloat Valve and Reservoir Water Seal and Lower O-Ring Drip BootDrive System Drive SystemCoupler Evaporator and Internal Components Evaporator DisassemblyRemove 2 setscrews Evaporator Barrel and Auger Inspection Bearings, Water Seal and O-Rings Evaporator Reassembly Seal Face InstallationExploded View of the Evaporator Refrigeration System Refrigeration System and ComponentsCompressor Page Refrigerant Pressures EF/EMF450A Page Air Cooled Condenser Remote High Pressure SafetyWater Cooled Condenser Water Regulating ValveExpansion Valve Production Check Expansion Valve Diagnosis SymptomProblem RemedyEvaporator Remote System Remote CondenserMixing Valve L.A.C., Headmaster Mixing Valve Diagnosis Problem Possible Cause Remedy Pump Down System Remote OnlyLiquid Line Solenoid Refrigerant ReceiverMethod of Charging Refrigerant F14 Contactor Selector SwitchElectrical System Control CircuitOverload External CapacitorsStart Relay Safety Control Bin ControlThermostatic Bin Control Auger Motor Relay Mechanical Bin ControlPump Down Control Compressor DelayEF250/255/405 EF450A/W 9071694-01 EF800A/W 9071963-01 EMF450/405A/W 9071958-01 EMF800A/W EMF705/1005/1006A/W 9071956-01 EMF1106R EMF2306A/W EMF2306R EMF2305L 9071959-01 Page

EF Series, EMF Series specifications

Ice-O-Matic is a recognized leader in the ice-making industry, known for its innovative technologies and commitment to quality. Among its flagship products are the EMF Series and EF Series ice machines, designed to meet the demands of various commercial environments. These machines combine advanced features with user-friendly functionalities, making them suitable for restaurants, bars, hotels, and convenience stores.

The EMF Series stands out with its capability to produce ice in a range of styles, including half cubes, full cubes, and gourmet ice. This versatile output makes it an excellent choice for establishments that require different ice types for various applications. The EMF machines are designed with a built-in storage bin, optimizing floor space while ensuring a continuous supply of ice. With production capabilities that can range from 200 to 800 pounds of ice per day, they cater exceptionally well to high-volume demands.

On the other hand, the EF Series focuses on efficiency and reliability. Featuring modular designs, these machines can be stacked or used in tandem, providing flexibility for businesses as their needs evolve. The EF Series offers a robust production range, capable of generating up to 1,500 pounds of ice daily, allowing it to service larger venues without sacrificing performance. The high-density foam insulation ensures that ice stays intact longer, reducing waste and enhancing overall efficiency.

Both series are equipped with Ice-O-Matic’s innovative Pure Ice technology, which not only ensures high-quality ice but also addresses concerns related to water quality. The built-in water filter options reduce impurities, resulting in clearer and more appealing ice. Additionally, these machines utilize an easy-to-clean design, promoting hygiene and maintenance simplicity. The front-access service doors facilitate straightforward maintenance, further minimizing downtime in busy environments.

Both EMF and EF Series machines are energy-efficient, boasting ENERGY STAR certifications. They are built with an environmentally friendly refrigerant, which helps establishments reduce their carbon footprint while saving on energy costs.

In conclusion, Ice-O-Matic's EMF and EF Series ice machines bring together cutting-edge technology, versatility, and efficiency, making them prime choices for any commercial establishment seeking reliable ice production. Their superior design features, user-friendly maintenance, and commitment to quality ensure that they meet the varied demands of the foodservice industry while promoting sustainability.
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