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Ice-O-Matic MFI manual

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Table of contents for the manual

  • Page 1

    Ice-O-Matic 11100 East 45th Ave Denver, Colorado 80239 Part Number 9081358-01 17-3168-01 Date 10/08 SERVICE AND INSTALLATION MANUAL MFI Series[...]

  • Page 2

    [...]

  • Page 3

    MFI Series Introduction Page i How To Use This Manual Ice-O-Matic provides this manual as an aid to the end user and service technician in installation and maintenance of the MFI Series ice machines. Do not attempt to perform installation, start-up or maintenance unless you have read and fully understand this manual. If, at any time, you encounter [...]

  • Page 4

    MFI Series Table Of Contents Page ii Table of Contents Introduction ................................................................................................................... ............... Page i Table Of Contents.............................................................................................................. .......... Page[...]

  • Page 5

    MFI Series Freight Claim Procedure Page iii Important! Inspect Promptly This merchandise has been carefully inspected and packed in accordance with the carrier’s packing specifications. Responsibility for safe delivery has been assumed by the carrier. If loss or damage occurs, you as the consignee must file a claim with the carrier and hold the c[...]

  • Page 6

    MFI Series Warranty Page iv Ice-O-Matic Parts and Labor Domestic & International L imited Warrant y Mile High Equipment LLC (the “Company”) warr ants Ice-O-Matic brand ice machines, ice di spensers, remote conde nsers, water filters, and ice storage bins to the end customer against defects in mate rial and factory workmanship for the follow[...]

  • Page 7

    MFI Series For the Installer Page 1 Installation Guidelines: For proper operation of the Ice-O-Matic ice machine, the following installation guidelines must be followed. Failure to do so may result in loss of production capacity, premature part failures, and may void all warranties. Ambient Operating Temperatures: Minimum Operating Temperature: 50?[...]

  • Page 8

    MFI Series For The Installer Page 2[...]

  • Page 9

    MFI Series For the Installer Page 3 Bin Application The MFI Series is designed to fit the following Ice-O-Matic Bins. ● B42, using Bin Top KBT 24 ● B25, B40 B55 using Bin Top KBT19. ● B100 using Bin Top KBT 23 (one unit) or KBT 22 (two units). ● B120, B150, B170-Not designed for MFI Series. Dispenser Application Flaked ice is not dispensabl[...]

  • Page 10

    MFI Series For the Installer Page 4 Location: Ice-O-Matic ice machines are designed to be installed indoors in a contro lled environment. Install the ice machine in a location where it has enough space around it t o be accessible for service. A minimum of 6 inches must be allowed at the back for air circulation on air cooled models. Try to avoid ho[...]

  • Page 11

    MFI Series For the Installer Page 5 A llow 6 “Clearance for Air Circulation A proper installation locates the ice machine indoors, but in a place where the heat and noise it produces are not objectionable. Air cooled machines discharge hot air out the back and must have a minimum of 6 inches of clearance behind the ice machine. Space for maintena[...]

  • Page 12

    MFI Series For the Plumber Page 6 Water Inlet: ● Air Cooled Models: The recommended water supply is clean, cold water. Use 3/8 inch O.D. copper tubing, connect to the 3/8 inch male flare at the back of the cabinet. Install a hand valve near the machine to control the water supply. ● Water Cooled Models: A separate 3/8 inch O.D. copper line is r[...]

  • Page 13

    MFI Series For the Electrician Page 7 Electrical Connections: Check the ice machine nameplate (located on the back panel) for the voltage requirements, and minimum circuit ampacity. The ice machine requires a solid chassis to earth ground. Connect the ice machine to its own electrical circuit so it is individually fused. Voltage variation must rema[...]

  • Page 14

    MFI Series For the Installer Page 8 Final Check List: _______ 1. Is the ice machine installed indoors in a location where the air and water temperatures are controlled and where they do not exceed the design limitations? _____2. Is there an electrical service disconnect within sight of the installed machine? _____3. Has the voltage been checked and[...]

  • Page 15

    MFI Series Start Up Page 9 Pre-Start Inspection: 1. Remove the front and side service panels. 2. Check that any shipping blocks have been removed. 3. Inspect the interior of the ice machine for loose screws or wires. 4. Check that no refrigerant lines are rubbing each other. 5. Check that t he fan blades turn freely (Air Cooled). 6. Check that t he[...]

  • Page 16

    MFI Series Component Description Page 10 ● Control Box: Contains the electrical controls that operate the machine. ● High Pressure Cut Out Switch: An auto-reset switch sensing the high side refrigeration pressure. It will shut the machine off if the discharge pressure e xceeds 450 psig. ● Low Pressure Cut Out Switch: An auto-reset switch sens[...]

  • Page 17

    MFI Series Component Description Page 11 ● Contactor: A definite purpose contactor connecting the compressor and the fan motor to the po wer supply. ● Circuit Board: Controls the operation of the ice machine using input from the sensors and pressure controls. Switches loads on and off thru relays. (Reference Photo Below) ● Potential Relay: Th[...]

  • Page 18

    MFI Series Component Description Page 12 ● Evaporator: A refrigerated vertical tube filled with water and containing a water seal and auger. ● Auger: A solid stainless steel double spiral auger, it pushes the ice crystals up to the top of the evaporator. ● Water Seal: A two part “face” seal, the top half rotating with the auger, the botto[...]

  • Page 19

    MFI Series Electrical Sequence Page 13 Electrical Sequence: There are 7 indicator lights on the control board: ● WTR-OK: (Water OK) Green . Normal=Glowing. Glow when there is water in the reservoir. ● PWR-OK: (Power OK) Green . Normal=Glowing. Glows when the power board has power and is functional. ● Service: Red . Normally Off. ● Freeze: R[...]

  • Page 20

    MFI Series Operation: Water Page 14 Water enters the machine through the 3/8 inch male flare at the rear of the cabinet, goes to the water reservoir which it enters through the float valve. The water then goes out the botto m of the reservoir tank to the bottom of the evaporator. Reservoir overflow or ev aporator condensation is routed to the drain[...]

  • Page 21

    MFI Series Operation: Performance Page 15 Beginning at the compressor, the refrigerant is compressed into a high temperature gas. The discharge line directs this gas to the condenser. At the condenser (air or water cooled) the gas is cooled by either air or water and then it condenses into a liquid. This high pressure liquid then goes through the l[...]

  • Page 22

    MFI Series Sanitizing and Cleaning Page 16 It is the USER’S RESPONSIBILITY to keep the ice machine and ice storage bin in a sanitary condition. Without human intervention, sanitation will not be maintained. Ice machines also require occa sional cleaning of their water systems with a specifically designed chemical. That chemical dissolves mineral [...]

  • Page 23

    MFI Series Bearing Maintenance Page 17 Bearing Maintenance: The bearing in the breaker should also be checked at least two (2) times per year. Switch the machine OFF and check the bearing. 1. Remove the chute cover. 2. Unscrew the ice sweep 3. Removing the water shed and unscrewing the breaker cover. Note: Left Hand Threads 5. Inspect the bearing. [...]

  • Page 24

    MFI Series Sensor Maintenance Page 18 Slide Bin Controls to Remove Bin Control Sensor: The bin control uses devices that se nse light, therefore they must be kept clean enough so that they can “see”. At least twice a year, remove the bin control sensors from the base of the chute, and wipe the inside clean, as illustrated. Water Sensor: The ice[...]

  • Page 25

    MFI Series Maintenance: Air Cooled Page 19 Clean the air cooled condenser: Air flow on this model is from front to back, so the inside of the ice mach ine will have to be available to clean the air cooled condenser. Use a vacuum cleaner or coil cleaner if needed. DO NOT use a wire brush. ● Disconnect electrical power , and remove the air filter i[...]

  • Page 26

    MFI Series Auger Maintenance Page 20 Auger: In some areas, the water supply to the ice machine will contain a high concentration of minerals, and that will result in an evaporator and auger becoming co ated with these minerals, requiring a more frequent removal than twice per year. If in doubt about the condition of the evaporator and auger, the au[...]

  • Page 27

    MFI Series Service Diagnosis Page 21 Symptom Possible Cause Probable Correction No ice is made nothing operates. •Unit off due to no power •Restore Power •Unit off due to master switch in OFF •Switch master Switch to ON position •Unit off due to low water level •Check water supply, filter s t r a i n e r , f l o a t v a l v e . C o r r [...]

  • Page 28

    MFI Series Service Diagnosis Page 22 Symptom Possible Cause Probable Correction Unit makes ice, but very slowly •High dischar ge pressure beca use •Clean filter and condenser. of a dirty condenser. •Low capacity because the auger and •Clean the water system. evaporator are coated with mineral s c a l e . •Low suction pressure due to low ?[...]

  • Page 29

    MFI Series Control System Diagnostics Page 23 The Control System consists of: ● Control Board ● Water Sensors ● Ice Sensors ● High Pressure Cut Out ● Low Pressure Cut Out If the unit is OFF , check the control board: 1. Is the Power OK light on? If not check power to the unit. If it has power, and the Power OK light is not on, check the h[...]

  • Page 30

    MFI Series R&R- Water Reservoir, Bin Control Page 24 Water Reservoir: 1. Disconnect electrical power supply. 2. Shut off water supply to the ice maker. 3. Remove the front panel. 4. Disconnect water inlet tube from reservoir inlet fitting. 5. To remove float valve, push in “locking tabs” as shown and pull float up. Note: The plunger/seat is[...]

  • Page 31

    MFI Series R&R-Bearing and Breaker Page 25 Note : Removal of the auger, water seal, evaporator and gear motor must begin at the top of the assembly. To Remove the Breaker Bearing Assembly: 1. Disconnect electrical power. 2. Remove panels. 3. Push back bail clamp and remove ice chute cover. 4. Unscrew and remove ice sweep. 5. Lift up and remove [...]

  • Page 32

    MFI Series R&R-Auger Page 26 To Remove the Auger: 1. Disconnect electrical power. 2. Turn off the water to the machine. 3. Unclip the evaporator drain hose, pull it down and drain the evaporator into the bin or container. 4. Remove the top panel. 5. Swing bail clip down and remove the ice chute cover. 6. Unscrew ice sweep. 7. Remove ice chute b[...]

  • Page 33

    MFI Series R&R-Water Seal Page 27 To Remove the Water Seal: (Assuming all steps to remove the auger have been performed) 1. The gear motor/evaporator assembly will have to be exposed. 2. Remove the four (4) hex head cap screws holding the evaporator to the gear motor assembly. Lift the evaporator up and off the gear motor. 3. Remove the snap ri[...]

  • Page 34

    MFI Series R&R- Evaporator Page 28 To Replace the Evaporator: (Assuming all steps for removal of the thrust be aring, breaker, auger and water seal have been performed). 1. Recover the refrigerant from the ice machine. 2. Unsweat the refrigerant connections: a. At the thermostatic expansion valve outlet. Evaporator Auger Ice Chute Ice Swee p b.[...]

  • Page 35

    MFI Series R&R-Gear Motor To Check the Gear Motor: 1. Remove wires from terminals 1 and 2 2. Use an ohmeter to check for continuity. If there is none, replace only the motor. If there is continuity but the motor will not start, check the motor’s start switch. 3. Remove motor end bell or motor stator. With ohmeter wires attached to 1 and 2 mov[...]

  • Page 36

    MFI Series R&R-Fan Blade and Motor Page 30 To Remove the Condenser Fan Motor Assembly: 1. Disconnect electrical power to the ice machine 2. Remove top panel and the service panels. 3. Unplug the fan motor wire leadsfrom the fan motors. 4. Remove the two (2)head bolt from the top end of the fan motor assembly. (Fig 1) 5. Lift up the fan motors a[...]

  • Page 37

    MFI Series Refrigeration System Service Page 31 Refrigeration Service: General: This ice machine uses R404A refrigerant and polyolester oil. Do NOT use mineral oil in this refrigeration system. ● When the refrigeration system is serviced, a special liquid line drier is re quired. It is included with replacement compressor. ● R404A is not compat[...]

  • Page 38

    MFI Series MFI0500 Wiring Diagram Page 32 Wiring Diagram MFI0500 Air, MFI0500 Water[...]

  • Page 39

    MFI Series MFI0800 Wiring Diagram Page 33 Wiring Diagram MFI0800 Air, MFI0806 Air, MFI0806 Water W/BK[...]

  • Page 40

    MFI Series MFI0805/1255 Wiring Diagram Page 34 Wiring Diagram MFI0805, MFI1255 Air[...]

  • Page 41

    MFI Series MFI1256 Wiring Diagram Page 35 Wiring Diagram MFI1256 Air[...]

  • Page 42

    MFI Series Service History Page 36 What to Do Before Calling for Service: ● Check the water supply to the ice machine. The ice machine is design ed to shut off if there is no water to it. Check the water filters if there are any. ● Check the power supply to the ice machine. Reset the breaker if it is tripped. ● If both water and power have be[...]