Ice-O-Matic ICE0250 Series User Manual
Ice-O-Matic Freezers
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Table of contents
Document Outline
- Sheet1
- icea02text.pdf
- icea03text.pdf
- icea04text.pdf
- icea05textrevision.pdf
- icea06textnew.pdf
- icea09text.pdf
- icea11text.pdf
- icea12text.pdf
- icea13text.pdf
- icea14text.pdf
- icea15text.pdf
- icea16text.pdf
- icea17text.pdf
- icea18text.pdf
- icea20text.pdf
- icea21text.pdf
- icea22text.pdf
- icea23text.pdf
- icea24text.pdf
- iceb01text.pdf
- iceb02text.pdf
- iceb03text.pdf
- iceb04text.pdf
- icec01text.pdf
- How To Use The Troubleshooting Trees
- The troubleshooting trees were developed to be used in conjunction with the service information in the sections that follow. If used together as intended, these two parts of the manual will allow the ice machine service technician to quickly diagnose many of the problems encountered with the ice machines. When used as designed, the troubleshooting trees can lead you from a general symptom to the most likely component to suspect as the cause of the problem. The trees are not designed to be “parts changer guides”: please do not use them as such.
- icec02text.pdf
- icea17text.pdf
- Electrical and Plumbing Requirements: ICE1506 Remote
- icea18text.pdf
- Remote Condenser Installation
- Installation Guidelines
- (Ambient operating temperatures: -20°F (-28.9°C) to 120°F (48.9°C)
- Remote Condenser Installation
- iced01text.pdf
- iced02text.pdf
- iced03text.pdf
- Water Splash Curtain
- The water splash curtain covers the evaporator to prevent water from splashing into the bin and is also used to actuate the bin switch. When the bin becomes full of ice, the splash curtain is held open when the ice drops off of the evaporator. The actuator tab or wire bale on the splash curtain will release pressure on the bin switch and the machine shuts off. See bin control on page F9.
- On single evaporator units, the splash curtain can be opened or removed during the freeze cycle and the machine will continue to run until the ice drops from the evaporator. On dual evaporator units, if the curtain is opened or removed during the untimed freeze cycle, or during defrost, the machine will shut down. If the curtain is opened or removed during the timed freeze cycle, the unit will continue to operate.
- iced04text.pdf
- iced05text.pdf
- iceE01text.pdf
- Refrigerant Cycle and Components
- Before diagnosing the refrigeration system, it is very important that the refrigerant charge be correct. Whenever the refrigeration system has been opened, the filter-drier must be replaced and the proper refrigerant charge must be weighed in. See refrigerant charge data on page A5–A8.
- Refrigerant Pressures
- iceE02text.pdf
- Air Cooled Condenser (Self Contained)
- The air condenser is located in the back of the cabinet. Air is pulled through the condenser by a fan motor and discharged through the right hand side panel. The ICE1400 has 2 fan motors and discharges through the right side and left side panels. The ICE Undercounter air intake and discharge is through the front panel. A top air discharge is available on the ICE250-ICE0606.
- iceE03text.pdf
- Thermostatic Expansion Valve (TXV)
- The thermostatic 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 circulating over the evaporator. As the evaporator fills with liquid refrigerant, the evaporator becomes colder.
- The flow of refrigerant into the evaporator is controlled by the temperature at the outlet of the evaporator. The expansion valve bulb, mounted to the top of the suction line, senses the evaporator outlet temperature causing the expansion valve to open or close. As ice forms on the evaporator, the temperature drops and the flow of refrigerant into the evaporator decreases, resulting in a drop in suction pressure.
- The evaporator should become completely flooded (filled with liquid refrigerant) during the freeze cycle. A completely flooded evaporator will have a uniform freeze pattern (ice formation across the evaporator). A starved evaporator (not enough liquid refrigerant) will have poor or no ice formation at the top of the evaporator, and the tube(s) exiting the evaporator will not frost. All tubes should be within 10 degrees of each other and frosted approximately 5 minutes from the start of the freeze cycle.
- An expansion valve that is restricted or not opening properly will starve the evaporator resulting in lower than normal suction pressure. A low refrigerant charge will also starve the evaporator and cause low suction and discharge pressures. If not sure of the amount of charge in the system, the refrigerant should be recovered and the correct charge be weighed in before a defective valve can be diagnosed.
- If the evaporator is starved but the suction pressure is higher than normal, the TXV is not the problem; refer to the troubleshooting tree in section C. If the TXV sticks open or if the thermal bulb is not making good contact with the suction line, the flow of refrigerant into the evaporator will be too great and liquid refrigerant will flood the compressor. The suction pressure will remain higher than normal and the machine will remain in an extended freeze cycle. Ice will build evenly but will be very thick.
- Symptom Problem Possible Remedy
- Evaporator flooded but suction 1 TXV thermal bulb not making 1 Tighten bulb clamp and
- pressure not dropping. good contact with suction insulate bulb.
- Compressor has been checked line or uninsulated
- and appears to be good. 2 TXV bulb installed incorrect 2 Locate bulb on top of
- 4 TXV stuck open 4 Replace TXV
- Evaporator starved, no frost 1 Machine low on charge 1 Recover refrigerant
- on line(s) exiting evaporator. and weigh in proper
- Suction pressure is low. charge
- See Evap. Diagram Pg.E4 2 TXV restricted or stuck 2 Replace TXV and
- closed drier
- iceE04text.pdf
- iceE05text.pdf
- Note: Permanent discoloration of the evaporator plating is normal and will cause no problems with harvesting the ice or sanitary conditions. Before condemning the evaporator for plating problems, be certain it is not just discoloration. Good evaporators will not be covered under warranty. If the spillway (plastic evaporator top) becomes damaged, it can be replaced. It is not necessary to replace the entire evaporator.
- Harvest Cycle
- Hot Gas Valve
- Remote System
- Remote Condenser
- iceE07text.pdf
- iceF01text.pdf
- All machines in this manual are electro-mechanical controlled; however the control circuitry on the single evaporator units differs from the dual evaporator units and is detailed below.
- Selector Switch
- The selector switch is used to put the machine into the ICE making or WASH cycle or to turn the machine OFF. The WASH position allows only the water pump to run and is used during the cleaning process to circulate cleaning solution throughout the water system. When the selector switch is turned to the ICE position, the machine begins the freeze cycle.
- iceE11A.pdf