Ice-O-Matic EMF Series, EF Series installation manual Expansion Valve

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Flake Ice Machines

Refrigeration System

Expansion Valve

The expansion valve meters the flow of refrigerant into the evaporator, changing its state from a high pressure liquid to a low pressure liquid. This drop in pressure causes the refrigerant to cool. The cooled refrigerant absorbs heat from the water in

the evaporator.

The flow of refrigerant into the evaporator is controlled by the temperature at the outlet of the evaporator. The expansion valve bulb, which is mounted to the top of the suction line, senses the evaporator outlet temperature causing the valve to open or close. As ice forms in the evaporator the temperature drops and the flow of refrigerant into the evaporator decreases.

The evaporator should become completely flooded (filled with liquid refrigerant). A completely flooded evaporator will form ice in the entire

evaporator. A starved evaporator (not enough liquid refrigerant) will have poor or no ice formation in the evaporator, and the tube exiting the evaporator will not frost.

The tubes in and out of the evaporator should frost within approximately 5 minutes from the time the compressor starts. An expansion valve that is restricted or not opening properly will starve the evaporator causing the suction pressure to be lower than normal. Wet ice or slow production will result.

A low refrigerant charge will also starve the evaporator and cause low suction and discharge pressure. It is important that the refrigerant charge be correct before diagnosing the valve. If not sure of the amount of charge in the system, the refrigerant should be recovered and the correct charge weighed in. If the evaporator is starved but the suction pressure is higher than normal, the compressor may be inefficient.

If the expansion valve sticks open or if the bulb is not making contact with the suction line, the flow of refrigerant into the evaporator will be too great and liquid refrigerant will flood back to the compressor. The evaporator temperature will be higher than normal resulting in wet ice and slow production.

A dual evaporator machine has one expansion valve for each evaporator. If one valve sticks open and the other is operating normally, the suction pressure will be higher than normal and the evaporator with the defective expansion valve will produce less ice than the side with the good valve. If one expansion valve sticks closed and one is operating normally, the suction pressure will be normal or low and the evaporator with the defective expansion valve will produce less ice than the side with the good valve.

Important!

Use only ICE-O-Matic O.E.M. replacement expansion valves. Warranty will be void if an expansion valve other than the correct ICE-O-Matic replacement part is used.

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Contents Service and Installation Manual Page Table Of Contents Flake Ice MachinesHow To Use This Manual General Information Model and Serial Number Format Model Numbers EF 80 0 aSerial Number Date Code Page Electrical and Mechanical Specifications RLA LRAInstallation Guidelines Ambient Operating Temperatures Electrical SpecificationsAdjustments DrainsEF Series EMF Series EMF Series 48 Inch Wide A10 Parts and Labor Domestic & International Limited Warranty ICE-O-MaticGeneral Operation Evaporator Float Gear Reducer Belt Auger MotorScheduled Maintenance Maintenance ProcedureCleaning and Sanitizing Instructions Winterizing Procedures Winterizing ProceduresCleaning Activity Cleaning Agent Cabinet CareMethod of Application Troubleshooting Trees How To Use The 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 Drip Boot Water Seal and Lower O-RingDrive System Drive SystemCoupler Evaporator Disassembly Evaporator and Internal ComponentsRemove 2 setscrews Evaporator Barrel and Auger Inspection Bearings, Water Seal and O-Rings Seal Face Installation Evaporator ReassemblyExploded View of the Evaporator Refrigeration System Refrigeration System and ComponentsCompressor Page Refrigerant Pressures EF/EMF450A Page High Pressure Safety Water Cooled CondenserWater Regulating Valve Air Cooled Condenser RemoteExpansion Valve Expansion Valve Diagnosis Symptom ProblemRemedy Production CheckEvaporator Remote System Remote CondenserMixing Valve L.A.C., Headmaster Mixing Valve Diagnosis Problem Possible Cause Remedy Pump Down System Remote OnlyLiquid Line Solenoid Receiver RefrigerantMethod of Charging Refrigerant F14 Selector Switch Electrical SystemControl Circuit ContactorOverload External CapacitorsStart Relay Safety Control Bin ControlThermostatic Bin Control Mechanical Bin Control Auger Motor RelayCompressor Delay Pump Down ControlEF250/255/405 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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