Ice-O-Matic MFI Service And Installation Manual Download Page 40 | Manualshive

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MFI Series

MFI0805/1255 Wiring Diagram

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Wiring Diagram MFI0805, MFI1255 Air

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Summary of Contents for MFI

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: ...ervice Department E Mail Tech service iceomatic com Telephone Numbers Any Service communication must include 800 423 3367 All Departments Model Number 888 349 4423 Technical Assistance Only Serial number 303 371 3737 A detailed explanation of the problem Keep this manual for future reference The MFI Series Service Parts Manual is available separately Ice O Matic icemakers and dispensers are not ap...

Page 4: ...d Cleaning Page 16 Bearing Maintenance Page 17 Sensor Maintenance Page 18 Air Cooled Maintenance Page 19 Auger Maintenance Page 20 Service Diagnosis Page 21 Control System Diagnostics Page 23 Removal and Replacement Water Reservoir and Bin Controls Page 24 Removal and Replacement Bearing and Breaker Page 25 Removal and Replacement Auger Page 26 Removal and Replacement Water Seal Page 27 Removal an...

Page 5: ...or carrier s inspection Visible Loss or Damage Any external evidence of loss or damage must be fully described and noted on your freight bill or express receipt and signed by the carrier s agent Claim should be filed on a form available from the carrier Concealed Loss or Damage If loss or damage does not appear until merchandise has been unpacked make a written request for inspection by the carrie...

Page 6: ...e interruption in the electrical or water supply charges related to the replacement of non defective parts or components damage by fire flood or acts of God This warranty is valid only when installation service and preventive maintenance are performed by a Company authorized distributor a Company authorized service agency or a Company Regional Manager The Company reserves the right to refuse claim...

Page 7: ...nsate pumps for draining water is not recommended by Ice O Matic Ice O Matic assumes no responsibility for improperly installed equipment Water Filtration A water filter system should be installed with the ice machine Clearance Requirements Self contained air cooled ice machines must have a minimum of 6 inches 15cm of clearance at the rear and sides of the ice machine for proper air circulation St...

Page 8: ...MFI Series For The Installer Page 2 ...

Page 9: ...nsable Ice Machine Specifications Refrigerant Charge oz R404 Maximum Fuse Size Minimum Circuit Ampacity Condenser Basic Electrical WxDxH Inches Model Number MFI0500AS 21x24x27 115 60 1 Air 15 8 20 22 MFI0500WS 21x24x27 115 60 1 Water 14 4 20 18 MFI0800AS 21x24x27 115 60 1 Air 19 5 30 24 MFI0806AS 21x24x27 208 230 60 1 Air 10 2 15 24 MFI0806WS 21x24x27 208 230 60 1 Water 10 2 15 20 MFI0805AS 21x24x...

Page 10: ...ar forward on the bin the opened door may not be stable resulting in an unexpected closing of the bin door If the ice machine is to be mounted on a bin or dispenser other than an Ice O Matic refer to the manufacturer s instructions for machine mounting Ice O Matic will not be responsible for damage or injury that results from unexpected closing of the bin door as a result of the ice machine being ...

Page 11: ... 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 maintenance access is also important If two units are placed side by side on a bin side access becomes even more important Two Units on One Bin Allow 6 Clearance for Air Circulation ...

Page 12: ...tment should be followed Drains Air Cooled Models Connect a rigid drain tube to the FPT drain fitting at the back of the cabinet The drain is a gravity type and a inch per foot fall is the minimum acceptable pitch for the drain There should be a vent at the highest point of the drain line and the ideal drain receptacle would be a trapped and vented floor drain Use only inch rigid tubing Water Cool...

Page 13: ... to earth ground Connect the ice machine to its own electrical circuit so it is individually fused Voltage variation must remain within the limitations even under starting conditions Note All external wiring must conform to national state and local electrical codes The use of a licensed electrician is required to perform the electrical installation Electrical Inlet Power Supply Water Cooled Models...

Page 14: ...made and checked for leaks _____5 Is the ice machine and storage bin level _____6 Is there a minimum of 6 inches of clearance at the back of the machine for proper service access and air circulation _____7 Is the water pressure a minimum of 20 psig _____8 Has the ice machine been secured to the bin _____9 Is there clearance over the top of the ice machine for service access ____10 Is there a water...

Page 15: ...cooled models the condenser will begin to discharge warm air on water cooled models the water regulating valve will open and warm water will be discharged into the drain 5 The unit should soon be making ice if desired the low side pressure may be checked it should be 32 psig 2 psig The suction line temperature at the compressor is normally very cold nearly to the point of frost up to the compresso...

Page 16: ...tains the water level in the evaporator at a constant level and it also contains the water level sensor Water Level Sensor Senses if there is water in the reservoir to make ice out of Will shut the ice machine off if there is no water in the reservoir Ice Discharge Chute Directs the ice produced by the evaporator into the storage bin Ice Level Sensor An electronic eye it senses the presence of ice...

Page 17: ...rols 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 The compressor start relay Mode ON OFF Switch Manual control for the machine Control Board Water OK Light Power Light Service Light Freeze Light Bin Full Light LED3 LED1 Compressor Relay Auger Relay ...

Page 18: ...he sealing action being where the two faces meet Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute Breaker Divider Where the ice is compressed and much of the extra water is squeezed out of it before it is discharged into the bin Motor A split phase motor that drives the gear reducer Thrust Bearings As the ice is pushed up the evaporator the auger ...

Page 19: ...or opens The auger motor stays on for 1 more minute clearing out ice in the evaporator and then The auger motor relay opens LED3 goes out and the auger motor stops The compressor will not restart until 2 minutes or more have passed after last shutdown If the path between the ice level sensors remains clear for more than 10 seconds the ice machine will restart Control Board Protection Devices When ...

Page 20: ...tom of the reservoir tank to the bottom of the evaporator Reservoir overflow or evaporator condensation is routed to the drain Water cooled models have a separate water circuit for the cooling water The water enters at the rear goes to the water regulating valve then to the water cooled condenser and down the drain Water System Water Inlet Water Level Evaporator Water Inlet Ice Chute Evaporator Dr...

Page 21: ...cle is repeated Typical Low Side Pressure Air Cooled 34 38 PSIG Typical Discharge Pressure Air Cooled 220 275 PSIG Typical Compressor Amp Draw MFI0500AS 115 60 1 8 9 Amps MFI0500WS 115 60 1 8 9 Amps MFI0800AS 115 60 1 8 9 Amps MFI0806AS 208 230 60 1 5 6 Amps MFI0806WS 208 230 60 1 5 6 Amps MFI0805AS 230 50 1 5 6 Amps MFI1256AS 208 230 60 1 5 6 Amps MFI1255AS 230 50 1 5 6 Amps Typical Auger Drive M...

Page 22: ... and the reservoir is nearly empty switch the master switch to OFF 11 After draining the reservoir as in step 6 wash and rinse the water reservoir 12 Go thru steps 13 18 to sanitize the ice machine water system 13 Mix two 2 gallons of sanitizer solution Use an approved sanitizer A possible sanitizer solution may be obtained by mixing two 2 gallons of warm 90 115 F potable water with one 1 ounce of...

Page 23: ... 5 Inspect the bearing There should be plenty of grease in sight If grease is needed the bearing and breaker should be removed to check the action of the bearing It should rotate freely 6 To remove the breaker remove the lower ice chute then take out all four 4 Allen head cap screws and pull the breaker off the auger and evaporator 7 If the bearing only needs grease inject grease into the bearing ...

Page 24: ...an 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 machine uses a probe in the water reservoir to determine if there is water At least twice a year remove the probe from the reservoir and wipe the tip clean of mineral build up Clean the probe s tip with ice machine cleaner and a soft cloth ...

Page 25: ... filter if applicable The filter may be cleaned or replaced Clean the condenser the condenser may appear to be clean on the surface but it can still be clogged internally Check with a flashlight from the front to see if light can be seen through the condenser fins Step 1 Remove the Top Panel Step 2 Remove two screws and unplug fan motors Step 3 Pull fan motor assembly up and to the right to remove...

Page 26: ...on removal of these parts see Removal and Replacement 1 Disconnect electrical power to the ice machine 2 Turn off the water supply to the ice machine 3 To remove the auger remove the front and top panels 4 Push back the bail clamp holding the ice chute cover to the ice chute and remove cover 5 Remove ice chute from evaporator 6 Remove four 4 Allen screws holding breaker to evaporator 7 Drain the e...

Page 27: ...n t turn Circuit board has not yet shut it down Unit is shut down Circuit board has shut ice machine down due to high auger motor amp draw Check for cause of high amp draw including bearings gear motor condition and scale on auger and in evaporator Low pressure control open Auger not turning due to motor failure auger relay failure on circuit board or or gears stripped Check drive train TXV restri...

Page 28: ...water seal leaks Check base of evaporator and drip pan If the seal leaks shut off the water remove the auger and replace the water seal Check the gear motor for water infiltration Excessive water use Water cooled model water regulating Adjust to 245 PSIG discharge valve not adjusted properly pressure Reservoir float valve leaks thru Replace float valve or seat Water cooled model overcharged Recove...

Page 29: ...the water sensor plugs into and place the other end in the water The WATER OK should go ON If it does not replace the board 3 Ice sensor Check Is the BIN FULL light OFF If it is OFF and the SERVICE light is OFF and the unit is not running replace the control board a If it is OFF and the auger motor is running but the compressor is not check the compressor contactor coil b If it is ON the ice senso...

Page 30: ... from reservoir bracket and remove reservoir from ice maker 9 Reverse to reassemble Water Sensor Float Assembly Locking Tabs Ice Chute Slide Bin Controls to Remove Bin Controls Ice Level Sensors 1 Disconnect electrical power supply 2 Remove the front panel 3 Remove the control box cover 4 Locate ice chute at the base of the chute in front of and behind it are two plastic bin control mounts 5 Slide...

Page 31: ... from auger and evaporator Fig 3 7 Service the bearing Check for rust rough spots and damage a The bearing is pressed into the breaker to remove the bearing and replace it an arbor press is needed b Replace lower seals before installing new bearing in breaker Note Seals must be pressed in with a tool pushing against the outer edge only they will not install by hand c Replace parts as required Re g...

Page 32: ...er from the breaker Note Left hand Threads b Unscrew auger stud from top of auger c Unscrew four 4 Allen head cap screws holding breaker to evaporator d Lift up and remove breaker from evaporator e If the auger is stuck use a slide hammer type of puller to pull on the auger at the threaded hole The size of that hole is 5 8 18 10 Inspect the auger the critical areas of the auger are a The auger bod...

Page 33: ...e bottom of the evaporator slightly past the groove for the snap ring 2 Replace the snap ring and pull the water seal down against it 3 The part of the water seal that rotates with the auger must also be replaced Remove the old part from the auger and clean the mounting area 4 Place a small bead of food grade silastic sealant Such as 732 RTV on the area of the auger where the water seal is to be m...

Page 34: ... the new evaporator at the old tubing connections 6 Install a new drier in the liquid line 7 Evacuate the system until dehydrated then weigh in the nameplate charge Check for leaks 8 Install auger breaker breaker bearing assembly and ice discharge chute in reverse order of disassembly To Reassemble the Evaporator and Auger 1 After the gear motor has been inspected fasten the evaporator to the gear...

Page 35: ...ews holding the gear motor to the base of the machine remove the gear motor from the machine Note Bench test the gear motor check for oil leaks noise and amp draw To Inspect the Gear Motor Water Shed 1 Remove the cap screws holding the gear motor case halves together and pry the two cases apart 2 To lift off the cover lift up until you can feel internal contact then pull the cover towards the outp...

Page 36: ... two 2 head bolt from the top end of the fan motor assembly Fig 1 5 Lift up the fan motors and bracket assembly about inch and pull out the fan assembly out the right service access hole Fig 2 6 Repair as needed 7 To Reassemble Place the fan motor assembly lower flange holes over the two Allen head cap screws in the base and install the hex head bolts at the top of the assembly Plug the fan motors...

Page 37: ...sight glass and or a restricting device such as a Charge Faster installed in it for metering liquid into the low side of the system 1 After a through evacuation shut off the manifold valves and switch off the vacuum pump R404A Tank Must Be in Liquid Dispensing Position Check Tank Low Side High Side Torque Stem to 6 8 ft lb Torque caps to 7 12 ft lbs 2 Place a drum of R404A onto an electronic scale...

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: ...___________________________________ ____________________________________________________________________________________________________________ ____________________________________________________________________________________________________________ ____________________________________________________________________________________________________________ _____________________________________...

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