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SERVICE AND INSTALLATION MANUAL EF and EMF Series

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1. RED WIRE USE 240 VOLT UNIT lt POWER SUPPLY SEE NAMEPLATE F y FUSE REQUIRE l OPER VOLTAGE FUSE REQUIRED ONL TH SIDES OF EQUIREMENTS AN LINE SIDE OF E LY F PES FUSE H ER SUPPLY 24 LT UNIT TYPE GREAKER SIZE j DLT UNIT AUTION 34 THIS UNIT MUST E 3E CROUNDE FAN AIR COOLED ONLY TERMINAL TRI CHUTE A m IN CONTROL AFETY S 3K NCTION 9 9 F S SN 1 4 E TACT 4 gt T 9 e 9 e 1 Bk c T i i IN CONTROL HICH PRESSURE a pp THERMOSTAT TROL Za k E FUSITE TECT LOW TEM RES d RM SAFETY TOP L Bk x K APACIT MOTO um ROT 5 j AUGE VE Oy RE OMS T CONTACT TROLS SHO AL ICE MAKING MODE oe ELAN HI PRESSURE CONTROL gt ONLY m H H LOW TEMP BIN CONTROL IN CONTROL ITCH SAFETY THERMOSTAT SAFETY SWITCH E L 9071958 01 Flake Ice Machines Electrical System EMF800A W
2. OPER VC N MEN E F 3 s FE a gt HA OLT UNIT THI IT T TYPE BREAKER SIZE gt E E FA OT Al LE L oft TERMINAL T TRI TIMER 0 Poe 6 0 CHUTE ASSY 5 e k C IN CONTROL AFETY TENTIAL ELA 9 i E HI RE E ONTROL TACT TROL THERMOSTAT ALTERNATE E H EXTERNAL 9 9 ES BUH E l sii asl ee ATE LE FUSIE gi ONLY lt TE rt SAFETY ELAY Ek L a TECT 9 ror E H INTERNAL OVERLOA TART 9 IT a TENTIAL TENTIAL TART ELA ELA APACIT e T N N k N T AUGE IVE 2 FA T AC ONLY Z NTACT TIMER TACT 4 IL TE THI ACHINE HAS 4 ELAY A ILL NOT BEGIN MAKI ICE TIL THE SET AMOUNT OF TIME TIMER 1 HAS PASSE ELA TROLS SHOWN AL y Au ICE MAKING MODE ri TECT AUGE ME LOW TE AFETY ELA MN TOP TROL HIGH PRE l TROL ITCH THE TAT TROL AFET ITCH E LY 9071954 01 Flake Ice Machines Electrical System
3. EMF Series Thermal Well NM LEN Sami Page G3 Flake Ice Machines Electrical System Mechanical Bin Control The mechanical bin control is located in the top panel of the ice bin on the EF Series and on the top of the down chute on the EMF Series When ice fills the down chute on the EMF Series units or ice fills the bin on EF Series units a rubber diaphragm pushes up against a switch To check the bin switch push up on the diaphragm or switch arm raising it approximately 1 8 inch This movement should actuate open the switch The switch should close when returned to the normal position The switch can be adjusted by loosening the adjusting screws and moving it to the proper position A T ITCH ACKET THAT ACTUAT E EST FLUSH IAGRAH FACE AS SHO gt j E Lr Um a X T gt ZZ f ZZ gt z zi i4 77 WA A Important The secondary bin switch should only be utilized as a safety If the machine is shutting off on the secondary control the primary control should be adjusted Auger Motor Relay The auger motor relay is used on modular models to energize the auger motor preventing excessive current through the bin control When power is supplied to the coil of the relay the normally open contacts close ener
4. E L EMF705 1005 1006A W sep Nameplate ros 1 KUSE REQUIRED ER VOLTAGE us EQUIREMENTS AN i E RE dl i st An LT UNIT THI IT VUST TYPE BREAKER SIZE E E FA TO Al ED ONL TERMINAL T TIMER v NE HUTE 4 e IN TROL AFETY S TENTIAL ELA k e M gt HI PRE E CONTROL NTROL TACT THERMOSTAT ALTERNATE COMPRE tT H EXTERNAL OVERLC ATE LE ELS ONL ee LOW TE ee AFET ELAY l l B ITECTOR 9 e uri c c Ld 9 e APACIT ESSO N H INTERNAL OVERLOA l 7 9 A T IT 9 9 AX Pour TENTIAL Ex E APACIT L IL 4 TENTIAL TART i 3 ELA 1 H PEN E id AUGE VE 7 T RC NM TACT TMER TACT 4 IL TE THIS MACHINE HAS A C ESSOR ELAY A ILL T BEGI AKI ICE UNTIL THE SET AVOUNT OF TIME N TIMER 1 HAS PASSE ELAY JA e e TROLS SH AL ia TECTO AUGE ICE MAKI E VE LOW TE AFETY ELA E 3 34 TOP NTROL HIGH PRE IN CONTROL TCH THE TAT ONTROL SAFETY SWITCH E L 9071956 01 Page G10 Flake Ice Machines Electrical System Ej L EE NAMEPLATE F EMF1106R ER VOLTAGE A EQUIREMENTS A 5 FA ER FUSE OR HAC Iz T TYPE BREAKER SIZE V 1 FUSE REQUIRE JTH S
5. Evaporator Float 1 AEA Gear Reducer V Belt Auger Motor Page A12 Flake Ice Machines CCC SChEduled Maintenance Danger Electrical shock and or injury from moving parts inside this machine can cause serious injury or death Disconnect electrical supply to machine prior to performing any adjustments or repair Maintenance Procedure Warning Failure to perform the required maintenance at the frequency specified will void warranty coverage in the event of a related failure To insure economical trouble free operation of the ice maker it is recommended that the following maintenance be performed every 6 months by a qualified service technician 1 Check the float reservoir for mineral build up or check the auger drive motor amp draw to determine if the water system needs cleaning Clean the water system if necessary per the instructions on Page B2 Local water conditions may require that cleaning be performed more often than 6 month intervals 2 Check the water level in the float tank as described on Page D1 3 Clean the condenser air cooled machines to insure unobstructed airflow 4 Check for leaks of any kind w
6. ELA TE l re 9 4 pa rs zT CAUTION THIS LAT AUGE TOR RE E USED ON UNIT ST BE 3K FAN MOTC K ZM 9071694 01 F lake Ice Machines Electrical System EF800A W ECONDARY BIN CONTROL DELS WITH FACTORY IN STORAGE ONLY ELECTRICAL L CT TE ITCH TROL AFET ALTERNATE COMPRE HOWN W EXTERNAL OVERLOA 9 e 9 Lr 9 ce C C O aN I TENTIAL S mure l 2 1 i ART e HIGH PRESSURE APACIT ECT ONTROL ATER 4 it le LJ e K H INTERNAL OVERLOA MA 9 9 pum TACT FUSE REQUIRED 4 4 LY Rs AUTION THI DEOR ERE NIT MUST BE JPPLY Ft m LT UNIT P AUGER MOTC EE NAMEPLATE FO E a FUSE HACR TYPE BREAKE b ees IZE A LTAGE REQUIREMENT VIE FA T OWE LY Al L MOT a FA LS SHO MOT AL ICE MAKI E L T TACT IL TH ONTROL J N ion HH HH nas ECONDARY BIN HIEPRESSURE TECT ONTROL na L 3 AUGE WE 9071963 01 Flake Ice Machines Electrical System EMF450 405A W 100120 V i wm
7. AUTION ER VOLTA E LY Fi EQUIREMENTS A 24 LT THI IT T ER FUSE HA E E TYPE BREAKER SIZE 1 TIMER Al SOOLE L 9 e I ete T FA NTROL 4 TERMINAL Al LE L CH TE HUTE A 4 e TROL TROL TENTIAL ELA HI PRES E d i i ALTERNATE E ONTROL a ri H EXTERNAL OVERLOA 6 ONIY e B us d 9 9 a s TACT FUSITE gk i APACHOR Pe TECT e 9 e CT THE TAT K TART APACIT ELAY E 9 s LOW TE LOW TE JHE in AFET AFET aM E ele H INTERNAL OVERLOA p ra TENTIAL ELA APACIT n MOT ae TENTIAL TART AN E ELA 1 E A E E 7 CONTROL FA L A ih FA T CONTACT By IMER CONTACT TE 4 COL THI HAS A CC E ELAY A ILL NOT BEGIN MAKING ICE TIL THE SET AMOUNT OF TIME TIVER 1 HA ASSE TROLS SH AL EL AUGE ICE MAKI ODE IVE e o i ri TECTOR TOP T LOW TE AFETY THERMOSTAT ELA N JM JM JA pi A ri Vi Vi Vi Vi Vi Vi LOW TEM HIGH PRE AFETY L THE TAT E L 9071955 01 Page G12 Flake Ice Machines Electrical System E EMF2306R L EE NAMEPLATE Fi E LTACE N A EQUIREMENTS A ai F ER FUSE H P T TYPE BREAKER SIZE s 1 FUSE REQUIRE TH SIDES OF E LY Fi LT IT HUT
8. Adjust water level or replace float if necessary YES Is suction pres sure higher than normal Check refriger ation system section F Excessive wear on evaporator and or auger See pg E3 Page C11 Flake Ice Machines Troubleshooting Trees Hot Evaporator Low Suction Pressure and Discharge Pressure Remotes Only Does the machine have the proper refrig erant charge Defective mix ing valve See page F10 Repair leak evacuate and weigh in charge as per serial plate Page C12 Flake Ice Machines Troubleshooting Trees Noise Coming from Evaporator Clean water system with ice machine NO LONGER NOISY cleaner See page B2 H Evaporator was dirty Perform cleaning more frequently Filters may need to be installed or replaced STILL NOISY Is the water level in the reservoir O OI set properly Adjust float valve See page D1 OK Check for an air bubble in the feed tube Check operating pressures If incorrect between the evaporator and float see appropriate troubleshooting tree or refer to section F2 See page D1 OK Check gear reducer for proper oil level See page E2 for proper level and oil type Disassemble evaporator barrel and inspect bearings and evaporator assem bly for damage or wear See page E3 Check auger motor and gear reducer for proper alignment C
9. EMF Series ICE DIPENSE AREA TO BIN IN BOTTOM F MACHINE DIA P p ICE WAKER WATER IN MALE FLARE 7 8 DIA KNOCK OUT FOI deed TO CONTROL PO FOR OUCON BB BOX m REMOTE CONDENSER FAN LEADS REMOTE ONL E ICE MAKER WATER OUT 1 2 15 PLASTIC TUBING N LIQUID LINE DIA MALE QUICK x NNECT PLING FOR USE WITH a N RT 325 OR RT 340 PRECHARGE N N LINE SET REMOTE ONL i DISCHRGE LINE 1 2 DIA MALE QUICK N NNECT COUPLING FOR USE WITH VON RT 325 OR RT 340 PRECHARGE LINE SET REMOTE ONLY 4 NDENSER WATER OUT l PPER TUBING ATEI LED ONL NDENSER WATER IN 8 0l PPER TUBING ATER COOLED ONLY Page A8 Flake Ice Machines EMF Series 48 Inch Wide General Information TYP MINIMUM WALL CLEARANCE co ICE DISPENSE AREA BIN IN BOTTOM F MACHINE DIA MINIMUM WALL CLEARANCE E FOR UTILITY CONNECTION TOP VIE ELECTRICAL CONNECTION 7 8 DIA HOLE FOI ELECTRICAL CONNECTION A P ad AIR IN NDENSER SIDE ICE MAKER WATER IN j FPT f 3 R F LIN HOLE FOR STRAI Ti REAR VIE MOUNTING TC ICE MAKER WATER OUT a er 4 All LEI NDENSER WATER IN EUER S eee Oat 3 8 Ol PPER TUBING WATER COOLED ONLY 7 8 KNOCKOUT
10. Ice O Matic SERVICE AND INSTALLATION MANUAL EF and EMF Series Flaked ICE Machines m TA Ice O Matic 11100 East 45th Ave Denver Colorado 80239 Part Number 9081325 01 Date 1 09 Flake Ice Machines Table Of Contents General Information Refrigeration System Continued Model and Serial Number Format A3 A4 Mixing Valve F10 Electrical and Mechanical Specifications A5 Pump Down System F11 Installation Guidelines A6 Liquid Line Solenoid F11 Electrical and Plumbing Requirements A7 A9 Receiver F12 Remote Condenser Installation A10 Refrigerant F13 Warranty Information A11 General Operation A12 Electrical System Control Circuit G1 Scheduled Maintenance Compressor and Start Components G1 Maintenance Procedure B1 Safety Control G3 Cleaning and Sanitizing Instructions B2 Bin Control G3 Winterizing Procedure B3 Auger Motor Relay G4 Cleaning Stainless Steel B4 Auger Motor G4 Compressor Delay G5 Troubleshooting Trees Pump Down System G5 Introduction C4 Pump Down Control G5 Machine Runs Does Not Make Ice C2 Machine Does Not Run C4 Wiring Diagrams Slow Production C5 EF240 255 405 EF450 A W G6 Low Suction Pressure C6 EF800 A W G7 High Suction Pressure C7 EMF450 405 A W G8 Machine Freezes Up Auger Seizes C8 EMF800 A W G9 Auger Motor Amperage Fluctuations C9 EMF705 1005 1006 A W G10 Water Leaking From Evaporator C10 EMF1106 R G11 Machine Produces Wet Ice C11 EMF2306 A W G12 Hot Evaporator Low Suction Pressure C12 EMF2306 R G13 Noise
11. 1051 7 3 61 208 230 60 1 3 12 8 20 R404A 24 680 EMF2306R 1828 830 8 1 61 208 230 60 1 3 15 5 20 R404A 240 6804 EMF Series 50 Hertz Machines EMF405A 432 196 3 16 1 230 50 1 3 6 6 15 R404A 12 340 EMF705A 821 373 4 1 34 5 230 50 1 3 8 6 15 R404A 17 482 EMF1005A 1080 490 5 2 42 230 50 1 3 10 15 R404A 34 964 R L A Rated Load Amps L R A Locked Rotor Amps Use refrigerant charge specified on Serial Plate when charging system Page A5 Flake Ice Machines General Information Installation Guidelines Note Installation should be performed by an Ice O Matic trained Service Technician 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 F 10 C Maximum Operating Temperature 100 F 38 C 110 F 43 C on 50 Hz Models Note Ice O Matic products are not designed for walk in cooler applications or outdoor installation Incoming Water Supply See Plumbing Diagram for line sizing Page A7 A9 Minimum incoming water temperature 40 F 4 5 C Maximum incoming water temperature 100 F 38 C Minimum incoming water pressure 20 psi 1 4 bar Maximum incoming water pressure 60 psi 4 1 bar Note If water pressure exceeds 60 psi 4 1 bar a water pressure regulator must be instal
12. F 40 F 36 158 110 100 F 61 352 EMF450A 90 F 70 F 56 290 70 F 50 F 52 222 50 F 40 F 51 131 110 F 100 F 57 374 EMF450W 90 F 70 F 50 250 70 F 50 F 48 250 50 F 40 F 46 250 110 F 100 F 54 250 Page F3 Flake Ice Machines Refrigeration System Refrigerant Pressures Continued The operating pressures for models utilizing the Sporlan thermostatic expansion valve are listed below Model Number EF250 255 EMF405A EF EMF450A EMF450W EMF705A EF EMF800A EMF800W EMF1005A EMF1106A EMF1106W EMF1106R EMF2306A Air Temp F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F 70 F 90 F SPORLAN Manufactured Expansion Valve Water Temp F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F 50 F 70 F Suction Pressure PSIG 52 56 55 59 50 53 54 57 49 53 53 57 50 52 52 53 38 40 42 45 45 48 49 51 41 43 41 43 38 42 42 45 41 43 43 47 38 39 38 40 39 41 43 37 38 42 Page F4 Discharge Pressure PSIG 192 LAC 240 LAC 240 310 225 285 290 260 320 325 250 250 270 345 350 275 340 345 250 250 295 300 328 333 270 320 325 250 250 215 220 257 273 278 268 275 330 335
13. Flake Ice Machines Refrigeration System Refrigerant Pressures Continued The operating pressures for models utilizing the Sporlan thermostatic expansion valve are listed below SPORLAN Manufactured Expansion Valve Model Air Water Suction Discharge Pressure PSIG Number Temp F Temp F Pressure PSIG 192 LAC 240 LAC EMF2306W 70 F 50 F 35 250 90 F 70 F 37 250 EMF2306R 70 F 50 F 36 210 266 90 F 70 F 41 275 280 260 Air Cooled Condenser Except Remote Self Contained Models EF Series The condenser and fan motor are located in front of the cabinet behind the front louvered panel Air is pulled through the left side panel and through the condenser and discharged through the front panel gt Modular Models EMF Series Except 48 Inch Wide Units The condenser is located in the front of the machine Air is pulled through the front louvered panel and through the air condenser by a fan motor Air is discharged through the left and right hand side panels gt TM Modular Models EMF Series 48 Inch Wide Units The condenser is located in the back of the cabinet Air is pulled through the condenser by two 2 fans and discharged through both louvered side panels Page F5 Flake Ice Machines Refrigeration System To properly cool the condenser there must be adequate airflow around the machine The ambient air temperature should not exceed 100 F 3850 See Installation Guideline on Page A6 T
14. REMOTE ELECTRICAL OF NNECTION LIQUID LINE 3 8 MALE QUICK N d DISCHARGE LINE MALE QUICK NNECT COUPLING FOR USE NNECT COUPLING FOR USE ITH RT 325 OR RT 34 ITH RT 325 OR RT 34 PRECHARGED LIME SET N PRECHARGED LINE SET REMOTE ONLY REMOTE ONLY PECIAL MODEL EMF2306LP PECIAL MODEL EMF2306LP 1 2 O D COPPER TUBING b O D COPPER TUBING REAR VIE LED REMOTE Page A9 Flake Ice Machines General Information Remote Condenser Installation The EMF1106R2 and EMF2306R2 remote ice makers incorporate the mixing valve in the condenser This configuration allows up to a 100 foot calculated remote line set run Reference the diagram below to calculate the maximum 100 foot line set run 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 failure and may void all warranties Remote condensers must be installed per local building codes A two to four inch diameter roof penetration will be needed for refrigerant lines and electrical conduit The penetration should be within two feet of where the condenser will be located A roof jack must be installed at the penetration Installation Guidelines e Ambient operating temperatures 20 F 28 9 C to 120 F 48 9 e Condenser Airflow Condensers must have a vertical airflow ICE Machine Model Number Remote Condenser Model Number EMF1106R2
15. Coming From Evaporator C13 EMF2305L G14 Water System Float Valve and Reservoir D1 Water Seal and O Rings D2 Drip Boot D2 Drive System Auger Drive Motor and V Belt E1 Gear Reducer E2 Coupler E2 Evaporator and Internal Components E3 Evaporator Disassembly E3 Evaporator and Auger Inspection E5 Bearing Water Seal and O Rings E6 Seal Face Installation E7 Evaporator Reassembly E7 Refrigeration System Refrigeration System and Components F1 Compressor F1 Refrigerant Pressures F2 Air Cooled Condenser F5 Water Cooled Condenser F6 Water Regulating Valve F6 High Pressure Safety Control F6 Expansion Valve F7 Production Check F8 Evaporator F9 Remote System F10 Page A1 Flake Ice Machines How To Use This Manual Ice O Matic provides this manual as an aid to the service technician for installation operation and maintenance of flaked ice machines This manual covers all EF and EMF series flaked ice machines If used properly this manual can also help the service technician troubleshoot and diagnose most of the problems that may occur with the machine Sections A and B of this manual provide general and maintenance information The remainder of the manual beginning with Section C provides troubleshooting information Section C contains flow charts called troubleshooting trees Page C1 provides instructions on using the troubleshooting trees Each troubleshooting tree is named to describe a particular problem with the operation of the machin
16. Machines General Information General Operation A general description of the flake ice machine operation is given below The remainder of the manual provides more detail about the components and systems Water enters a reservoir through the float valve and is gravity fed into the evaporator barrel through an opening in the bottom of the barrel Water fills the evaporator to the same level as the water in the reservoir A float valve which stops the flow of water into the reservoir when the reservoir becomes full maintains this water level When the ON OFF switch is turned on or when the bin control closes the auger motor energizes The compressor is delayed for 2 to 4 minutes After the compressor delay period the condenser fan motor air cooled machines only and compressor start and the temperature of the evaporator barrel drops The water in the evaporator freezes to the inner walls of the evaporator barrel A belt driven gear reducer a a AN continuously turns the auger inside the evaporator As the auger m turns it pushes the ice upward and forces it out of the top of the barrel through the delivery chute and into the storage bin As ice is pushed out H E f through to top of the evaporator make up water enters the bottom of the evaporator
17. a screwdriver while using compressed air to blow all the water out of the condenser a Remove all of the ice in the storage bin and discard oW E i i a LN Eh j TED m SES PEN Disconnect tubing from float to evaporator and drain water from the evaporator Page B3 Flake Ice Machines Cabinet Care Cleaning Stainless Steel Commercial grades of stainless steel are susceptible to rusting It is important that you properly care for the stainless steel surfaces of your ice machine and bin to avoid the possibility of rust or corrosion Use the following recommended guidelines for keeping your stainless steel looking like new 1 Clean the stainless steel thoroughly once a week Clean frequently to avoid build up of hard stubborn stains Also hard water stains left to sit can weaken the steel s corrosion resistance and lead to rust Use a nonabrasive cloth or sponge working with not across the grain 2 Don t use abrasive tools to clean the steel surface Do not use steel wool abrasive sponge pads wire brushes or scrapers to clean the steel Such tools can break through the passivation layer the thin layer on the surface of stainless steel that protects it from corrosion 3 Don t use cleaners that use chlorin
18. and install the complete lower housing into the evaporator by applying even pressure upward It may be necessary to tap the housing with a rubber mallet or with a hammer and hard wooden block Install and tighten the lower evaporator nut Install and tighten the lower nut setscrews NS 7 A X Apply silicone sealant to the N N rubber side of the seal do not moh apply silicone to the flat portion of 7 the seal S ON N I Carefully install the seal face as shown do not damage the flat portion of the seal SS ame A 7 4 15 T E Carefully install the auger and upper housing assembly into the evaporator barrel taking care not to scrape the evaporator walls Push downward on the housing until the bearing housing is seated against the evaporator barrel A rubber mallet may be needed to tap the housing into place Install the grease cap and tighten the upper evaporator nut 7 Reverse the first 6 steps in the Evaporator Disassembly Section lal Torque setscrews to 55 inch pounds V ZEE Auger should turn freely by hand Page E7 Flake Ice Machines Drive System Exploded Vi
19. for the following e Cube ice machines GEM model compressed ice Ice storage bins Twenty four 24 month parts and labor machines MFI model flake ice machines and remote condensers Thirty six 36 months parts and labor EF and EMF model flake ice machines Twenty four IOD model dispensers Twenty four 24 months parts Twelve 12 24 months parts and labor months labor e CD model dispensers Thirty six 36 months parts and e Water filter systems Twelve 12 months parts and labor not including labor filter cartridges An additional twenty four 24 month warranty on parts excluding labor will be extended to all cube ice machine evaporator plates and compressors GEM model compressed ice machine compressors and MFI model flake ice machine compressors from the date of original installation An additional thirty six 36 month warranty on parts excluding labor will be extended to all EF and EMF model flake ice machine compressors from the date of original installation The company will replace EXW Incoterms 2000 the Company plant or EXW Incoterms 2000 the Company authorized distributor without cost to the Customer that part of any such machine that becomes defective In the event that the Warranty Registration Card indicating the installation date has not been returned to Ice O Matic the warranty period will begin on the date of shipment from the Company Irrespective o
20. of the seal Use a 2 3 4 I D pipe for 3 inch seals and a 1 3 4 I D pipe for the 2 1 2 inch seals Insure that the pipe is cut off square Use extreme caution to prevent damage to the seal Remove any excess silicone from the flange Apply a small bead of silicone to the seal flange circumference Lower O Ring a c N Bearing Page E6 FR X PVC Pipe Water Seal Flake Ice Machines Drive System Torque bolt to 40 ft lbs Seal Face Installation installation Fill cavity with grease T Lightly lubricate the rubber portion of the seal face and Pack bearing um 15 RE NK ape L it it i cani apply a small amount of silicone sealant to the metal grease prior to uU MS NK part of the seal face rubber side that seats against the auger Install the seal face on the auger Caution Do not scratch or damage the seal face F re Evaporator Reassembly Lubricate the upper O Ring with food grade white grease and attach the upper housing to the auger Pack the tapered roller bearing with Chevron Oil FM Grease EP NLGI 0 or equivalent Fill the cavity below the bearing with grease Install the bearing over the bearing journal install the washer and bolt tighten to 40 ft Ibs Lightly lubricate the O Ring on the lower housing
21. see if it is engaged If the contactor is not engaged the problem is not with the compressor or the compressor start components If the contactor is engaged and there is correct voltage through the contactor there could be a problem with one of the starting components or the compressor It is recommended that the compressor starting components be replaced when replacing a compressor Page G1 Flake Ice Machines Electrical System Compressor Check ne if the compressor uses AWARNING Disconnect power before servicing an internal overload be certain that the compressor has cooled and the overload has reset before diagnosing the compressor If the compressor is cool and is still not running check the compressor motor windings by first removing the wires at the compressor terminals With an ohmmeter check for continuity between all three terminals if an open circuit exists between any of the terminals the compressor may need to be replaced Check for continuity from each terminal to the compressor body if continuity is found from any terminal to the compressor body the compressor windings are shorted to ground and the compressor will need to be replaced If the compressor appears to be good at this point it is advisable to use a compressor analyzer to isolate the compressor from the start components while checking for a locked rotor If an analyzer is not available the compressor starting components must be checked If all starting compon
22. system See Section F Check water regulating valve for proper Adjust or operation and adjustment See page F6 replace water regulating OK Check refrigeration system See Section F Page C5 Flake Ice Machines Troubleshooting Trees Low Production Is the water in the reser voir even with the insu lation around evaporator Check float for proper adjust ment or restric tion Adjust or clean float NO Purge valve leaking YES LOW Does the NO Check for correct head pressure machine have See page F2 a remote con denser Low charge locate amp repair leak NORMAL OR evacuate and HIGH recharge system Check mixing valve and pump down system See page F10 DRY SYSTEM p Correct restricted tubing Check expansion valve for moisture based restriction Check for refrigerant tubing restriction crimps etc WET SYSTEM Replace drier evacuate and recharge system Expansion valve is defective See page F7 Page C6 Flake Ice Machines Troubleshooting Trees High Suction Pressure Have you checked the slow produc tion tree Go to troubleshoot ing tree page C5 NOT OK Is the head pres Check compressor page F1 sure also high Replace co
23. the machine off within approximately 3 minutes Once the water supply has been turned back on the control should close and the machine should start within approximately 5 minutes The safety control can be adjusted by turning the adjusting screw clockwise to lower the cut out temperature colder and counterclockwise to raise the cut out temperature warmer Bin Control A primary thermostatic bin control and mechanical secondary bin switch in used to shut the machine off when the bin becomes full of ice Adjustment Screw Thermostatic Bin Control The thermostatic bin control is located in the control box with the capillary tube housed in a thermal well located in the bin or down chute When ice comes in contact with the thermal well the contacts in the control open and the machine shuts down When ice is removed the machine comes back on Check the thermostatic bin control for proper adjustment with the machine running by covering approximately 6 inches 15CM of the thermal well The machine should shut off in approximately 3 minutes Remove the ice once the machine shuts off and the machine should restart within approximately 5 minutes The bin control can be adjusted by turning the adjusting screw clockwise to lower the cut out temperature colder and counterclockwise to raise the cut out temperature warmer EF Series Bin Pus E Thermal Well TEN J fua B
24. using a punch and hammer Tap out the lower bearing and water seal To remove the lower bearing and water seal turn over and support the housing assembly by the flange on the housing carefully tap on the bearing with a punch and hammer until the water seal and bearing are removed from the housing Support housing on housing flange EN Remove the O Rings and clean the upper and lower bearing housings Housings Shown Inverted Install the new upper bearing race and lower bearing in their respective housings with a bearing press or a bearing driver Do not use a hammer directly in the bearing or bearing race Install new O Rings in the upper and lower housings lightly lubricate the O Rings with white food grade grease Lubricate the upper bearing and bearing race Install the lower water seal in the bearing housing by first applying a thin bead of silicone around the water seal flange NE circumference This will prevent water from leaking between the Ps housing and metal portion of the seal Upper O Ring s A D of pipe to match O D p Press the water seal into the housing with a bearing press and a of water seal flange short piece of PVC pipe Place the pipe over the seal so that the pipe is in contact with the flange portion
25. E HUTE e C 9 TROL NTROL AFET AFETY E Hi INTERNAL ERL 9 9 9 e e 4 LIQUID LINE 7 LENO NN TENTIAL h Z AUGER DRIVE D ELA IT TENTIAL TART ESSOR 4 RELA AP CIT T EMOTE FA TACT uum LIQUID LINE 4 oL RELAY M e e TECT AUGE NOTE ME THI ACHINE HA E ELA ILL NOT BEGIN MAKI ICE UNTIL THE SET AMOUNT OF TIME DS EPR PANA AREE TIMER 1 HAS SSE M REL VI L E V FI j ONT Vi Fai OL BIN CONTROL NTROLS SHOWN AL TAT SAFET ICE MAKI E HICH PRE TROL Ind TROL E LY Page G13 Flake Ice Machines Electrical System EMF2305L ALL CONTROLS SHO ry OP OLTAGE FUSE REQUIRED IN NORMAL ICE REQUIREMENTS AND 3OTH SIDES OF IAKIN E PER FUSE OR HACR WE lv F 7 TYPE BREAKER SIZE LT UNIT 7 P E AUTI THI IT MUST iE E TERMINAL a
26. ESSOR 115 6 9 29 0 1 FAN 115 8 16W DRIVE 1 AUGER 115 4 6 1 4HP RATED POWER CONSUMPTION KW REFRIGERANT R404A CHARGE CIRCUIT 1202 340 GRAMS NUMBER OF REFRIGERANT circuits 1 DESIGN PRESSURES P S I 252 LO 450 HI BARS 17 7 L0 31 6 HI LISTED 361P C US ICE MAKER WITHOUT STORAGE MEANS MILE HIGH EQUIPMENT CO DENVER COLORADO 80239 MADE IN U S A RATED ENERGY EFFICIENCY KWH 100 LB 4 8 KJ KG 396 8 MINIMUM BIN ENERGY EFFICIENCY jo Verified in Accordance With Energy Standard CAN CSA 742 98 and ARI 810 91 by Underwriters Laboratories Inc Approved City of Los Angeles Mechanical Testing Laboratory Accepted for use City of New York Department of Buildings M 860074 MEA 37 00 E MODEL NUMBER EMF450AS2 SERIAL NUMBER 4071280010077 VOLTS HERTZ PHASE 115 60 1 MAX FUSE SIZE 15 0 REFRIGERANT R404A CHARGE CIRCUIT 1202 340 GRAMS LISTED 361P C US ICE MAKER WITHOUT STORAGE MEANS General Information Since all Enodis companies will eventually be utilizing same operating system a company wide format for serial numbers has been designed This format is 14 characters long and begins with a date code followed by the Ice O Matic identifier and then a sequential number This is an entirely numerical serial number The new serial number will look like the example 0407 1280 010077 010077 is the serial identifier 1280 is the identifier Ice O Matic 0407 is the date co
27. IDES OF E LY Fi 24 LT UNIT HUTE A I TROL AFETY E H INTERNAL ERL k k a L e J 9 ar 1 LIQUID LINE A LENOII e VOT 1 T A TENTIAL No n o AUGE NE ELA ACIT t TENTIAL TART ELA IT I E MOT HOT EMOTE FA zx TACT A TME LIQUID_ LINE d so ELA el TECT AUGEI TE THIS MACHINE HAS A E ELAY A ILL NOT BEGIN MAKI ICE UNTIL THE SET A T OF TIME LOW TE TIMER 1 HAS PASSE ALL VT VT V a 2 TOP C TROLS SH AL ITCH AFETY SWITCH ICE MAKING MODE JNTROL N TACT Ad t HIGH E ITROL E 9071962 01 Flake Ice Machines Electrical System EMF2306A W j SEE NAMEPLATE TH SIDES OF
28. VRC1061 EMF2306R2 VRC2061 Limitations for new remote machines that have the headmaster mounted in the condenser Maximum Drop is 15 feet Maximum equivalent run is 100 feet alr DRECTIO Maximum Rise is 35 feet Formula for figuring maximum equivalent run is as follows Rise x 1 7 Drop x 6 6 horizontal run equivalent run Examples 35 ft rise x 1 7 40 ft horizontal 99 5 equivalent feet line run 35 ft rise 40 ft horizontal Verify the ICE machine is compatible with the remote condenser Some ice machines and some remote condensers may or may not have a Mixing Valve Head Master Only one valve is required per system Kits are available to modify the ice machine or condenser for compatibility For more information contact your Ice O Matic Distributor Hl il DISECTIO 34ft horizontal 10ft drop 10 ft drop x 6 6 34 ft horizontal 100 equivalent feet line run Page A10 Flake Ice Machines General Information Ice O Matic Parts and Labor Domestic amp International Limited Warranty Mile High Equipment LLC the Company warrants Ice O Matic brand ice machines ice dispensers remote condensers water filters and ice storage bins to the end customer against defects in material and factory workmanship
29. a complete assembly Both seal and seal face must be replaced together O Ring Seal Face Lower bearing NN Drip Boot The drip boot is located at the bottom of the evaporator to catch condensation from the evaporator water seal leak will not drain into the drip boot since the water will track down the auger shaft Note Too cold of water temperature below 50 F and improper water level are two of the most common problems for flakers causing low production too hard and or wet ice Page D2 Flake Ice Machines Drive System Drive System The drive system consists of all components used to turn the auger The auger drive motor turns the gear reducer via a V Belt A coupler is used to connect the gear reducer to the auger The auger is located in the evaporator and is supported by two bearings one at each end Evaporator Auger Drive Motor and V Belt When facing the shaft the auger motor should turn counter clockwise Drip Boot A pulley on the shaft of the motor holds one end of the V Belt which is used to connect the auger motor to the input shaft of the gear reducer The pulley on the auger drive motor must be aligned with the pulley on the
30. ally all of the following symptoms will be present e Higher than normal suction pressure e Cold or frosted compressor suction line Slow ice production and or wet ice If the coil is separated the evaporator must be replaced If the outlet of the evaporator is not frosted the problem is not with coil separation Refer to the Troubleshooting Trees in Section C As liquid refrigerant leaves the evaporator it changes to a low pressure vapor before returning to the compressor Important Liquid refrigerant must not return to the compressor or damage may result Frost on the suction line at the inlet of the compressor indicates liquid may be returning to the compressor Check for frost during the freeze cycle If liquid refrigerant is returning to the compressor the problem must be located and corrected Page F9 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 re
31. ally 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 CONDENSER LIQUID bypasses the condenser increases as the ambient INLET 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 DISCHARGE GAS INLET Page F10 Flake Ice Machines Refrigeration System Mixing Valve Diagnosis Line returning from condenser is cool allowing refrigerant through condenser Problem Possible Cause Remedy Head pressure low Valve defective not a Replace valve Line between valve allowing discharge and receiver cold gas into receiver Ambient condenser temp below 70 F 21 C Head pressure low System low on a Leak check Recover Line between valve charge refrigerant and weigh and receiver hot Valve defective not in proper charge allowing liquid into b Replace valve receiver Head pressure low Valve defective not a Replace valve Ambient condenser temperature is above 70 F 21 C Pump Down System Remote Only The pum
32. ater refrigerant oil etc 5 Check the Primary Bin Control for proper adjustment as described on Page G3 6 Check the Secondary Bin Control for proper adjustment as described on Page G4 7 Check the Safety Control for proper adjustment as described on Page G3 8 Check the water requlating valve water cooled machines for proper adjustment by measuring the water temperature at the outlet of the condenser drain It should be between 100 F 37 750 and 110 F 43 3 C 9 Check the TXV bulb to make sure that it is securely fastened and properly insulated 10 Check all electrical connections tightness Warning Disconnect electrical supply 11 Oil the auger motor if the motor has oil fittings 12 Check the V Belt for wear and proper tension as described on Page E1 Page B1 Flake Ice Machines Scheduled Maintenance CAUTION Protective eyewear and gloves should be worn when using cleaning products CLEANING AND SANITIZING INSTRUCTIONS 1 Turn the machine and water supply to the float off 2 Remove or melt all ice in the bin 3 Prepare one gallon 3 75 of non chlorine ice machine cleaner i e Nu Calgon Nickel Safe as directed on container 4 Turn the machine on remove the float reservoir cover and add cleaning solution to the reservoir 5 As the machine makes ice keep the reservoir filled with the cleaning solution until the entire gallon is used up 6 Turn the machine off 7 Prepare 1 gallon 83 75 of approv
33. block with a hammer Remove the upper bearing housing from the auger by removing the mounting bolt and washer Caution Do not hit the auger shaft with a metal hammer as damage to the auger shaft will result Upper Nut Remove the seal face from the auger by prying it off with a screwdriver a Te Remove the lower m P evaporator retaining nut Bearing 5 TS by first using an 1 8 inch SPN 3 ANP h NS an Do AN howe ind a Upper Housing Assembly ee J j S screws from the lower nut Remove the lower Auger evaporator retaining nut EN by using a chain wrench wrap chain around the lower part of the nut to loosen the nut Right Hand Thread Caution If the two 2 sets screws are not removed damage to the evaporator threads will result Remove the lower bearing housing assembly from the evaporator barrel by placing a dowel approximately 18 inches long against the lower bearing and tapping lightly on the dowel until the bearing housing is S removed from the evaporator Seal Face Bearing Lower Seal O Ring Remove 2 setscrews Lower Housing Assembly Lower Nut Right Hand Thread Page E4 Flake I
34. ce 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 claims made for ice machines or bins used in more than one location This Limited Warranty does not cover ice bills normal maintenance after install adjustments and cleaning Limitation of Warranty This warranty is valid only for products produced and shipped from the Company after January 2007 A product produced or installed before that date shall be covered by the Limited Warranty in effect at the date of its shipment The liability of the Company for breach of this warranty shall in any case be limited to the cost of a new part to replace any part which proves to be defective The Company makes no representations or warranties of any character as to accessories or auxiliary equipment not manufactured by the Company REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE CUSTOMER MILE HIGH EQUIPMENT SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY ON THIS PRODUCT EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ON THIS PRODUCT IS LIMITED IN DURATION TO THE LENGTH OF THIS WARRANTY Filing a Claim All claims for reimbursement must be received at the factory within 90 days from date of servic
35. ce Machines Drive System Vertical Score Lines Guide the Ice Upward Evaporator Barrel and Auger Inspection Inspect the evaporator for damage around the dispense opening If it is cracked or bulged outward it is probably due to a bin control failure Check both bin controls for proper adjustment and operation before the machine is put back into service Inspect the interior of the evaporator barrel for damage The interior of the evaporator should be smooth and have no scoring or damage due to the auger coming in contact with the evaporator side If damage is present the evaporator will require replacement The evaporator is available as an assembly which includes all internal components or is available as the evaporator barrel only which does not include the internal components Clean the auger and inspect for corrosion or wear If the auger is corroded or if the flights are worn from contact with the evaporator walls it should be replaced The auger bearing journals can be checked for wear by using hand pressure to install a new bearing onto the journals The bearing should fit tightly around the journal If the bearing does not fit tight the auger is worn and must be replaced or machined to the proper size Augers used in the 3 inch diameter evaporators should have a journal diameter between 1 1803 and 1 1809 inches for both the upper and lower journals Augers used in the 2 1 2 inch diameter evaporators should have an uppe
36. de in YYMM format 2004 July The date code will change monthly and yearly to reflect the date of manufacture Large data plate will be placed on the back of the unit Small data plate will be placed by the service valves Page A4 Flake Ice Machines Electrical and Mechanical Specifications Production per General Information 24 Hours No of Minimum Max 90 FA 70 FW Compressor wires incl Circuit Fuse Refrigerant Model Number Lbs Kg RLA LRA Voltage ground Ampacity Size Type Oz Grams EF Series 60 Hertz Machines EF250A 319 145 5 7 30 2 115 60 1 3 12 4 15 R404A 12 340 EF450A 360 163 7 2 40 115 60 1 3 14 5 15 R404A 17 482 EF800A 616 280 10 4 51 115 60 1 3 18 2 20 R404A 15 426 EMF Series 60 Hertz Machines EMF450A 372 169 6 9 40 115 60 1 3 14 1 15 R404A 12 340 EMF450W 472 214 6 8 40 115 60 1 3 13 1 15 R404A 14 397 EMF800A 632 287 10 5 51 115 60 1 3 19 8 20 R404A 17 482 EMF800W 756 343 9 5 51 115 60 1 3 16 5 20 R404A 16 454 EMF1106A 816 370 4 5 34 2 208 230 60 1 3 9 4 15 R404A 34 964 EMF1106W 1008 458 4 4 34 2 208 230 60 1 3 8 5 15 R404A 15 426 EMF1106R 912 414 4 5 34 2 208 230 60 1 3 10 4 15 R404A 160 4536 EMF2306A 1808 821 8 4 61 208 230 60 1 3 14 9 20 R404A 78 2211 EMF2306W 2240
37. e When following the troubleshooting trees the service technician will be led through questions and checks and end up at a probable solution When using the troubleshooting trees it is important that the service technician understand the operation and adjustments of the components being checked and the component suspected of being defective A detailed description of the operation and adjustments of the components as well as other service information is laid out in the pages that follow Section C Each section after Section C focuses on a particular system in the ice machine water system drive system refrigeration system and electrical system It is important that these sections be used together with the troubleshooting trees in Section C Most aspects of flake ice machines are covered in this manual However should you encounter any conditions not addressed herein please contact the Ice O Matic Technical Service Department for assistance at the numbers listed below or write the Ice O Matic Service Department Ice O Matic 11100 East 45 Ave Denver CO 80239 Attn Technical Service Department Phone 800 423 3367 After Hours Only 888 FIX 4 ICE 349 4423 Fax 303 576 2944 E Mail Tech service iceomatic com Any service communication must include e Model Number e Serial Number e A detailed explanation of the problem WARNING Always disconnect electrical power and shut off water supply whenever maintenance or repairs are
38. e or chlorides Don t use chlorine bleach or products like Comet to clean the steel Chlorides break down the passivation layer and can cause rusting 4 Rinse with clean water If chlorinated cleansers are used you must thoroughly rinse the surface with clean water and wipe dry immediately 5 Use the right cleaning agent The table below lists the recommended cleaning agents for common stainless steel cleaning problems Cleaning Activity Cleaning Agent Method of Application Routine cleaning Soap Ammonia Windex or Apply with a clean cloth detergent with water or sponge Rinse with Fantastik 409 Spic nSpan clean water and wipe dry Liquid are also approve for Stainless Steel Removing grease or Easy Off or similar oven Apply generously allow fatty acids cleaners to stand for 15 20 minutes Rinse with clean water Repeat as required Removing hard water spots Vinegar Swab or wipe with clean and scale cloth Rinse with clean water and dry Page B4 Flake Ice Machines Troubleshooting Trees 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 mo
39. e rises the bellows expand increasing the water flow through the condenser Adjusting the spring pressure screw at the top of the valve can change the rate of water flow The unit should be run for 10 minutes then the valve should be adjusted as needed to maintain a refrigerant discharge pressure of 250 PSI 18 3 Bar Water exiting the condenser should be between 100 F 38 C S and110 F 43 C When the machine is off either on full bin or when the A selector switch is in the off position the regulating valve will close completely stopping the flow of water through the condenser If the water flow does not stop when the machine is not running the valve should be replaced Air Cooled Condenser Remote See Pages F10 or go to Page A10 for remote condenser installation High Pressure Safety The high pressure safety control is a normally closed control If the discharge pressure becomes too high the high pressure safety control will open and shut the machine off The high pressure safety control is an automatic reset type and will close and restart the machine when the pressure drops The high pressure safety control is used on all water cooled and remote machines and some air cooled machines Page F6 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 pres
40. e to be eligible for credit All claims outside this time period will be void The model the serial number and if necessary proof of installation must be included in the claim Claims for labor to replace defective parts must be included with the part claim to receive consideration Payment on claims for labor will be limited to the published labor time allowance hours in effect at the time of repair The Company may elect to require the return of components to validate a claim Any defective part returned must be shipped to the Company or the Company authorized distributor transportation charges pre paid and properly sealed and tagged The Company does not assume any responsibility for any expenses incurred in the field incidental to the repair of equipment covered by this warranty The decision of the Company with respect to repair or replacement of a part shall be final No person is authorized to give any other warranties or to assume any other liability on the Company s behalf unless done in writing by an officer of the Company GOVERNING LAW This Limited Warranty shall be governed by the laws of the state of Delaware U S A excluding their conflicts of law principles The United Nations Convention on Contracts for the International Sale of Goods is hereby excluded in its entirety from application to this Limited Warranty Mile High Equipment LLC 11100 East 45 Avenue Denver Colorado 80239 303 371 3737 January 2007 Page A11 Flake Ice
41. ed U S FDA 21 CFR 178 1010 food equipment sanitizer to form a solution with 100 200 ppm free chlorine yield Reserve about 1 3 gallon for step 14 below 8 Turn the machine on and add the sanitizer to the reservoir keeping the reservoir filled with sanitizer until 2 3 gallon is used up 9 Turn the machine off 10 Replace the float reservoir cover and turn the water supply back on 11 Turn the machine on and allow the machine to make ice for 15 minutes 12 Turn the machine off and remove and discard all of the ice from the bin made during the cleaning operation 13 Clean the inside of the bin bin door and door frame with warm soapy water and rinse 14 Using the remainder of the sanitizing solution wipe all areas of the bin liner door and door frame etc and rinse 15 Turn machine back on Page B2 Flake Ice Machines Winterizing Procedures Winterizing Procedures Important Whenever the ice machine is taken out of operation during the winter months the procedure below must be performed Failure to do so may cause serious damage and will void all warranties 1 Turn off water to machine 2 Make sure all ice is out of the evaporator s 3 Place the ON OFF switch to the OFF position 4 Disconnect the tubing between the evaporator and water float 5 Drain the water system completely 6 On water cooled machines hold the water regulating valve open by prying upward on the water valve spring with
42. eed The gear reducer should be inspected for oil leakage noise and vibration during scheduled maintenance Mounting of the machine If the Bracket gear reducer is noisy Pa vibrating or seizing the oil level may be low internal parts may be 2 worn or the gear lt l r PES reducer may be under CAS LAC excessive load due to a I l NN A FO problem in the NM x evaporator If a problem NN is found with the gear R reducer it must be f OS replaced A D Output Shaft If the gear reducer is damaged it may bind or lock up causing the 2 auger motor to shut off Fe xa ur on overload This is usually caused by a i damaged worm gear due Input Shaft to lack of lubricant or excessive loading of the gear reducer Note The are no serviceable parts available for the gear reducer The 9171010 03 Gear Reducer is a sealed component and does not require service Coupler The coupler is a three piece assembly used to connect the gear H reducer to the auger The coupler includes the upper half lower half 1 and the nylon spider which fits between the teeth of the coupling L hil _ J ss halves preventing metal to metal contact of the coupling teeth There should be an 1 8 inch gap between the coupler halves The 1 spider should fit tightly between the coupling teeth If there is excessive play between the coupling halves the spider s
43. eed the problem Adjust repair or replace the component as necessary Page C1 Flake Ice Machines Troubleshooting Trees Machine Runs Does Not Make Ice Is float reservoir YES re al full of water Is compressor running YES Make sure water pressure is at least 20psi and that float valve is not restricted Problem in refrig eration system see section F Is water leaking from the evapora tor barrel NO VOLTAGE YES Replace water the seals Purge valve leak ing Page C2 Check for voltage at purge VOLTAGE NO Is compressor con tactor energized GO TO PAGE C3 Check compressor and com pressor start components Check purge timer for proper valve if machine has purge system 7 operation replace if defective Purge relay or relay socket defective Flake Ice Machines Troubleshooting Trees Machine Runs Does Not Make Ice VOLTAGE Check voltage at contactor coil CONT FROM PAGE C2 Defective contactor rA NO VOLTAGE Does the YES Does the YES machine have machine have a compressor delay timer a remote con denser Defective pump down control bypass relay or relay socket NO Timer Y defective Purge relay or relay socket defective Page C3 Flake Ice Machines Troubleshooting Trees Machine Does Not R
44. en or remove the two 2 screws securing the float reservoir bracket to the frame Raise or lower the reservoir so that the water level is even with the top of the insulation surrounding the evaporator Resecure the reservoir at this level l j f Water Wn V T Level Hr F s Bs H Jf Ti g Page D1 Flake Ice Machines Water System Water Seal and Lower O Ring The water seal is located in the bottom of the evaporator and prevents water from leaking out of the evaporator The water seal consists of two 2 components the seal and the seal face The seal is fitted into the lower bearing housing and the seal face fits around the auger shaft with the rubber side seating against the bottom of the auger When the water seal assembly is in place the top of the seal presses against the seal face If the water seal fails water will usually leak between the lower bearing and the auger shaft See Page E6 for water seal replacement procedure Note The water seal is available only as
45. ents are good check the amperage draw from the common terminal of the compressor making sure proper voltage is supplied to the compressor and all wiring is properly connected If the compressor does not start and there is excessive amperage draw see locked rotor amps on compressor tag the compressor has a locked rotor and should be replaced Important Compressors returned to the factory for warranty are tested and will not be covered under the warranty policy if they are not defective Overload External If there is no amperage draw check the compressor overload The compressor overload can be checked for continuity after removing it from the compressor and letting it cool to room temperature If there is no continuity between the two terminals replace the overload If the overload is suspected of opening prematurely it should be replaced with an overload which is known to be good Capacitors The start capacitor is an electrical storage device used to provide starting torque to the compressor If a start capacitor is defective the compressor will not start properly The run capacitor is an electrical storage device used to improve the running characteristics and efficiency of the compressor Before checking a capacitor it should be discharged by shorting across the terminals If a run or start capacitor is cracked leaking or bulging it should be replaced If a capacitor is suspected of being defective it can easily be checked by rep
46. er Recover refrigerant and weigh in proper charge Replace TXV and filter drier Recover refrigerant and weigh in correct charge Replace TXV Replace defective TXV Note Verify that the condenser is clean and the inlet water temperature and level is correct prior to performing a production check Flake Ice Machines Refrigeration System Evaporator When water fills the evaporator liquid refrigerant is circulated through the tubing wrapped around the evaporator As the liquid refrigerant in the tubing vaporizes it absorbs heat from the water causing it to freeze The evaporator should be completely flooded with refrigerant while the machine is making ice A flooded evaporator will build ice evenly in the evaporator A starved evaporator will produce less ice and the ice will be wetter than normal Most problems with ice quality or freeze ups are not related to a defective evaporator Use the Troubleshooting Trees in Section C for additional help If the evaporator is flooded but the suction pressure is lower than normal and the ice production is slow it is possible that the evaporator has a restriction If the evaporator is flooded but the suction pressure is higher than normal and ice production is slow it is possible that the evaporator has coil separation Evaporator coil separation is the separation of the refrigerant tubing from the evaporator barrel This is rare but may occur from time to time Usu
47. ew of the Evaporator RETAINING NUT AUGER SEAL FACE Page E8 GREASE CAP BOLT AND WASHER us UPPER BEARING _ WATER SEAL LOWER BEARING a ae LOWER HOUSING s O RING Flake Ice Machines Refrigeration System Evaporator Compressor Condenser High Pressure Vapor High Pressure Liquid Low Pressure Vapor Low Pressure Liquid Refrigeration System and Components Before diagnosing the refrigeration system it is 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 or measured See refrigerant charge information on Page A5 Refrigerant is circulated throughout the refrigeration system by a hermetic compressor Refrigerant in its vapor state is circulated from the compressor to the condenser Heat is removed from the refrigerant Heat is removed from the refrigerant either by forced air movement through the condenser or by a heat exchanger water cooled condenser that transfers heat from the refrigerant to the water The refrigerant changes to a liquid when cooled The refrigerant in a liquid state passes through a filter drier The filter drier traps moisture and foreign particles from the system Important The filter drier must be replaced whenever the refrigeration system is opened or if the refrigerant charge is lost Compressor The compressor runs during
48. f the actual installation date the product will be warranted for a maximum of seventy two 72 months from date of shipment from the Company ICE model cube ice machines which are registered in the Water Filter Extended Warranty Program will receive a total of eighty four 84 months parts and labor coverage on the evaporator plate from the date of original installation Water filters must be installed at the time of installation and registered with the Company at that time Water filter cartridges must be changed every six 6 months and that change reported to the Company to maintain the extended evaporator warranty No replacement will be made for any part or assembly which I has been subject to an alteration or accident Il was used in any way which in the Company s opinion adversely affects the machine s performance III is from a machine on which the serial number has been altered or removed or IV uses any replacement part not authorized by the Company This warranty does not apply to destruction or damage caused by unauthorized service using other than Ice O Matic authorized replacements risks of transportation damage resulting from adverse environmental or water conditions accidents misuse abuse improper drainage 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 servi
49. fore replacing the liquid line solenoid Prior to replacing the valve disassemble and check for obstructions that may not allow the valve to seat Page F11 Flake Ice Machines Refrigeration System Receiver If the system has a remote condenser the refrigerant will enter a receiver before passing through the filter drier The receiver holds reserve liquid refrigerant during the freeze cycle The receiver also stores liquid refrigerant during the off cycle COMPRESSOR CONDENSER saaa Hiph Pressure Vapor LIQUID LINE Gu High Pressure Liquid SOLENOID EEEE Low Pressure Vapor Low Pressure Liquid Refrigerant Refrigerant in a high pressure liquid form is fed to an expansion valve where the refrigerant is reduced to a low pressure liquid Under this low pressure the liquid will absorb heat from the evaporator causing the liquid to change to a vapor This vapor is the drawn into the compressor where the temperature and pressure of the vapor are increased The high temperature high pressure vapor flows to the condenser where the heat is removed causing the vapor to return to the liquid form making the refrigerant ready to flow back to the evaporator to pick up more heat Most Ice O Matic ice machine use R134a or R404a refrigerant Always check the serial number data plate for the proper type of refrigerant and the amount used in the machine you are servicing R404a and R134a are both HFC refr
50. gizing the auger motor Auger Motor The auger drive motor is used to turn the gear reducer via a V Belt The auger motor should turn counter clockwise when facing the pulley end of the motor The auger motor uses an internal overload protector which opens if the motor is under excessive load If the overload protector A A opens the entire machine will shut off and will restart when the overload cools and resets Problems with the drive system such VOT LI as a dirty evaporator or bad bearings are TN T usually the cause of the overload protector RG tripping This can be checked by reading the gt AUGER VOT auger motor amp draw A fluctuation of more than 4 10 of an amp indicates there may be a problem in the drive system See the Troubleshooting Trees on Page C9 Note When replacing an auger motor make sure the new motor is wired properly Page G4 Flake Ice Machines Electrical System Compressor Delay When the machine starts the compressor delay timer is energized Once the timer counts out the contactor is energized and the compressor starts The compressor delay timer will keep the compressor off for approximately 5 minutes when the machine restarts for any reason This will reduce the load on the auger drive system On remote units the compressor delay timer energizes the liquid line solenoid Note The compressor delay timer is only utilized on the EMF1106 5 and EMF2306 5 units Pump Do
51. he 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 or distort the condenser fins If the condenser fins are bent this will also restrict the airflow through the condenser and the fins will need to be straightened with a fin comb Water Cooled Condenser If the machine has been installed properly the water flow through the condenser will be opposite the refrigerant flow For proper water flow the water for the condenser must be piped through the water valve first The water condenser must have a minimum of 20 PSI 1 4 Bar of flowing water pressure to the condenser The water temperature to the condenser must not exceed 100 F 38 C A water regulating valve is used to control to flow of water to the condenser In areas that have poor water quality the condenser may eventually become coated with mineral deposits This will decrease the efficiency of the condenser resulting in high head pressure and high water usage Water cooled condensers replaced because of failure due to excessive mineral build up will not be covered under warranty Water Regulating Valve The water regulating valve controls the head pressure by regulating the amount of water flow through the condenser The bellows of the water regulating valve are connected to the high side of the refrigeration system As the discharge pressur
52. heck coupling halves they should not be touching Check spi der for wear See page E1 Page C13 Flake Ice Machines Water System Water System The water system in the flaker uses a floated operated valve that maintains the water level in the evaporator barrel during ice making Float Valve and Reservoir Water enters the machine through the float valve located in the water reservoir and is gravity fed into the evaporator barrel through the water inlet tube As the evaporator fills with water the inlet tube and reservoir will fill to the same level When the evaporator is full and the machine is off water will lift the float ball stopping the flow of water approximately 1 4 inch before overflowing the reservoir The float valve can be adjusted by bending the arm attached to the float ball While the machine is making ice the float valve should maintain the water level so that is 1 4 inch below the top insulation surrounding the evaporator barrel The water in the evaporator will also be at this level It is important that the water be maintained at this level for proper operation of the machine If the water level is too high water at the top of the evaporator will not freeze and wet ice will result If the water level is too low ice will freeze harder than normal putting excessive load on the drive system To adjust the water level in the evaporator turn the machine on and wait for the machine to begin making ice Loos
53. hooting Trees Auger Motor Amp Draw Fluctuates Has the evapora tor barrel been cleaned Clean the evaporator See page B2 YES and tension setting See page E1 Check drive belt for excessive wear Adjust belt tension or replace if nec essary NOT OK Check the gear reducer See page E2 gt Replace gear reducer Remove and inspect upper and lower NOT OK evaporator bearings and check the auger journals for wear Install new bear ings and or auger and water seals Bad evaporator barrel Page C9 Flake Ice Machines Troubleshooting Trees Water Leaking From Bottom of Evaporator Is the lower retaining nut tight Tighten lower retaining nut and set screw YES Check the seal amp face assembly for wear and or cracks Replace lower seals and o ring Replace lower o ring and water seals Check the lower o ring for damage Check the auger for corrosion and or wear Replace auger lower seals and o ring Warped or cracked evaporator barrel Page C10 Flake Ice Machines Troubleshooting Trees Machine Produces Wet Ice Is the machine YES connected to a water softener Water softener may cause poor ice quality Bypass softener if possible Check water level in float tank See NOT OK page D1 ee
54. hould be inspected for wear and replaced Page E2 Flake Ice Machines Drive System Evaporator and Internal Components The evaporator assembly includes the evaporator and all of its internal components The internal components consist of the upper and lower bearings and housings water seal assembly upper and lower O Rings auger and upper and lower nuts The evaporator assembly will need to be disassembled for inspection or repair if one or more of the following conditions exist e Metal particles in the ice e Grease in the ice Follow the appropriate troubleshooting tree in Section C for the following symptoms before disassembling the evaporator e Water leaking from the bottom of the evaporator assembly e Auger seizing up e Auger motor amp draw fluctuating more than 4 10 of an amp with proper line voltage e Noise coming from the evaporator assembly Evaporator Disassembly It is recommended that the entire evaporator be disassembled and inspected whenever a problem occurs in the evaporator Disconnect electrical power and shut off the water supply to the ice machine Remove the condensation cap insulation and ice chute from the top of the evaporator On EF models remove the top panel and disconnect the wires from the secondary bin control and remove the bin control cap tube from the brass tube Drain the evaporator by disconnecting the water feed tube from the float to the evaporator On EF m
55. igerants which result in no ozone depletion factor R404a cylinders are orange in color R134a cylinders are light blue in color Important When discharging refrigerant from an icemaker recover as much of the refrigerant as possible with a recovery device or some other means to prevent the refrigerant from entering the atmosphere Page F12 Flake Ice Machines Refrigeration System Method of Charging Refrigerant In order to achieve a properly charged refrigeration system the system must be completely evacuated To achieve a complete evacuation you will need a service gauge manifold with properly maintained hoses and a vacuum pump capable of pulling a 50 micron vacuum This will require a two stage pump Connect the service gauge manifold to the high and low side service ports and vacuum pump Make sure the valves on the gauge manifold are closed then start the pump Note Do not use a refrigeration compressor as a vacuum pump Compressors are able to pull only a 50 000 micron vacuum After the vacuum pump has been started open the valves on the gauge manifold This will allow the refrigeration system to start being evacuated If there has not been an excessive amount of moisture in the system allow the vacuum pump to pull the system down to about 200 microns or 29 9 inches or less Once this has been achieved allow the vacuum pump to operate for another 30 minutes Then close the valves on the gauge manifold and stop the vacuum
56. input shaft of the gear reducer This can be checked by placing a straight edge across the face of the IN two pulleys If out of alignment the i pulleys can be repositioned by 2s loosening the setscrew that holds the V pulley to the shaft realign the pulleys and then retighten the setscrew J p Coupler The V Belt can be adjusted by Auger Motor loosening the four 4 auger motor mounting bolts and moving the motor AY 7 until the proper belt tension is We ag achieved The belt should be 5s adjusted so that it will flex Gear Reducer approximately 1 2 inch when applying slight pressure to the center of the belt If the V Belt is too tight it will put an excessive load on the auger motor and gear reducer If the V Belt is too loose it may slip and reduce ice production Auger motors should be oiled once a year with approximately 4 to 5 drops of SAE 20 oil in each bearing Note Models with two evaporators use a single drive motor with a shaft on each end of the drive motor Page E1 Flake Ice Machines Drive System Gear Reducer The gear reducer transfers torque to the auger The auger drive motor turns the input shaft of the gear reducer at a high rate of speed The input shaft turns a worm screw type gear that meshes with a worm gear bronze gear The worm gear turns the output shaft at a reduced sp
57. lacing it with a capacitor of the correct size which is known to be good If the compressor starts and runs properly replace the original capacitor A capacitor tester can also be used Start Relay The start relay breaks the electrical circuit to the start windings when the compressor motor speed increases If the relay is defective the compressor will not start or it may start but will run for a very short time A compressor relay can be checked by removing the relay and checking the relay contacts for damage and check for continuity across the closed relay points Check the relay coil with an ohmmeter If no continuity is read replace the relay Page G2 Flake Ice Machines Electrical System Adjustment Screw Safety Control The low temperature safety control prevents the machine from x operating without water in the evaporator of if the v belt breaks If QE EM the evaporator temperature drops below approximately 30 F 1 C l fq the safety control will open and shut the machine off ol The safety control is located in the control box and the capillary tube is located in a thermal well attached to the bottom of the evaporator barrel just above the lower nut To check the safety control for proper operation turn the water supply to the float off and allow the machine to operate When the water in the float and feed tube has been depleted the safety control should open shutting
58. led Drains Route bin drain float drain and water condenser drain individually to a floor drain The use of condensate 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 around the entire machine Stacking EF and EMF Series ice machines are not designed to be stacked Dispenser Application EF and EMF Series ice machines are not designed to be placed on dispensers Electrical Specifications The machine must be installed on a separate circuit Refer to the serial plate at the rear of the ice machine or the charts on Page A5 Adjustments Level the machine Check the primary and secondary bin control for proper adjustment Page G3 Check the safety control for proper adjustment Page G3 Check the water in the water float for proper level Page D1 Check the water regulating valve adjustment if water cooled Page F6 Page A6 Flake Ice Machines General Information EF Series ELECTRICAL INLET 3 DIA KNOCKOUT NN N EL A FOT FITTING ICE MAKER WATER OUTLET ID PLASTIC TUBING Page A7 Flake Ice Machines General Information
59. mote 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 Li overheat and eventually become damaged The condenser coil and fan Air Flow 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 parti
60. mpressor Check condenser and fan blade and clean if necessary Expansion valve is defective See page F7 NO Check condenser fan motor and blade for NOT OK proper operation water regulator valve water cooled machines pg F6 Repair or replace ixi pg F1 mixing valve remote condenser pg F10 defective part STILL TOO HIGH Expansion valve is defective or TXV sensing bulb loose See page F7 System may be overcharged evacuate and recharge system Page C7 Flake Ice Machines Troubleshooting Trees Machine Freezes Up Auger Seizes ls the water FLUCTUATION in the reser Does freeze up voir even occur immediate Check the auger motor with the insu ly upon compres amp draw for fluctuations lation around sor start up See page G4 See Auger Motor Amp Draw Fluctuates trouble tree on page C9 evaporator Check compressor delay timer if used for proper operation See page G5 Check for a low suction pres sure See page F7 See Low Suction Pressure trouble tree Check the evaporator and bearings for damage or wear See page E3 Clean evaporator See page B2 See low suction pressure trouble tree page C6 Check the evaporator and bearings for damage or wear See page E3 Page C8 Flake Ice Machines Troubles
61. ne TOP EMBLY S K e 9 TIMER BK IN CONTROL AFETY 4 e CHUTE ASSEMBLY v LOW TEMP LOW TE lOe SAFETY SAFETY 3IN CC SAFETY Le 9 ese i p IN THERMOSTAT 9 Doe IN THERMOSTAT ELAY 4 f 9 9 x M y N 9 M ap MOTOR e BK LIQUID LINE T ENO OLENOI TIMER Le v LIQUID LINE St AUGE RIVE 5 OL GER ELAY DRIVE y OTC OTECT B Ti IN CONT LOW TE D T4 AFETY THERMOSTAT RELAY H H 1 Vt H M 1 o LOW TE 3I SAFETY THE TAT E L TROLS SH l AL 9071959 01 m Page G14
62. odels remove the chassis from the cabinet by disconnecting the water and drain lines and the incoming electrical at the cabinet junction box Remove the chassis mounting bolts and slide the chassis out of the cabinet Remove the drive belt and inspect for cracks or damage Remove the gear reducer by removing the 4 bolts holding the gear reducer to the frame Inspect the spider located between the coupling halves Remove the upper coupling half from the auger by using a V wrench to loosen the 5 16 bolt and pulling the coupler half off of the auger shaft If the coupler half is seized to the auger shaft remove the bolt and spray lubricant into the bolthole Let the lubricant soak then use a puller to remove the coupler half Do not pry or use a hammer on the coupler as damage may result Remove the drain tube from the drip boot and remove the drip boot by pulling down on one side and working the boot off of the evaporator lower retaining nut Page E3 Flake Ice Machines Drive System Remove the upper evaporator retaining nut by using a chain wrench wrap chain around the upper part of the nut to loosen the nut Setscrews are not used on the upper nut Right Hand Thread Caution Do not use a hammer and chisel to loosen the nut as damage will result Remove the auger and upper bearing housing assembly by tapping upward on the auger shaft with a rubber mallet or place a block of hardwood against the auger shaft and tap upwards on the
63. or flooded but suction pressure too high Compressor has been checked and appears to be good Suction line at compressor may be colder than normal 2 One evaporator starved and one evaporator properly flooded suction pressure lower than normal Production Check Check ice production by allowing the machine to produce ice into a container for 15 minutes If the machine has 2 evaporators be sure to collect the ice from each evaporator separately so that production from each evaporator can be checked Weigh the ice in each container and multiply the weight by 96 This will give you the approximate production in a 24 hour period a Problem TXV sensing bulb uninsulated or not making good contact with suction line TXV sensing bulb in wrong location System overcharged TXV stuck open Machine low on charge TXV restricted or stuck closed Machine low on charge TXV restricted or stuck closed System overcharged An expansion valve stuck open TXV restricted or sticking closed Weight of ice produced in 15 minutes X 96 production in 24 hours Page F8 Flake Ice Machines Refrigeration System Expansion Valve Diagnosis Remedv Clean suction line and clamp bulb securely Insulate bulb Relocate sensing bulb to top of suction line Recover refrigerant and weigh in correct charge Replace TXV Recover refrigerant and weigh in correct charge Replace TXV and filter dri
64. p down system prevents liquid refrigerant from migrating to the evaporator and compressor during the off cycle and prevents the compressor from slugging or starting under an excessive load Liquid Line Solenoid When a machine with a remote condenser shuts off the liquid line solenoid valve located at the outlet of the receiver is de energized causing the valve to close completely restricting the flow of refrigerant The compressor will pump all of the refrigerant into the condenser and receiver As the system pumps down the pressure on the low side of the system drops When the suction pressure drops to 19 psi 1 3 bar the pump down control opens and shuts the machine off See page G5 for pump down control operation Liquid refrigerant is stored in the condenser and receiver while the machine is off It is normal for the machine to pump down once or twice an hour as the pressures equalize When the machine comes back on the bin switch closes or the selector switch placed to the ICE position the liquid line solenoid valve opens and the refrigerant is released from the receiver When the suction pressure rises to 45 psi 3 1 bar the pump down control closes and the machine comes back on If the machine will not pump down the valve may not be closing all the way A weak compressor will also prevent the machine from pumping down Check for signs of a weak compressor be
65. performed on the ice machine and related equipment CAUTION Always wear protective eyewear whenever maintenance or repairs are performed on the ice machine and related equipment Page A2 Flake Ice Machines General Information Model and Serial Number Format Model Numbers EF 80 0A1 Level Condenser Type A Air W Water R Remote Voltage 0 115V 5 240 50 1 6 208 230 60 1 Approximate 24 hour ice production x 10 70 F 21 C Air and 50 F 10 C Water Series E Environmental Flaker Uses HFC Refrigerant F Self Contained Flake Ice Machine MF Modular Flake Ice Machine Serial Number Date Code The first letter in the serial number indicates the month and decade of manufacture The first digit in the serial number indicates the year of manufacture Example AOXX XXXXX Z is manufactured January 2000 A1XX XXXXX Z is manufactured January 2001 A4XX XXXXX Z is manufactured January 2004 1990 1999 MONTH 2000 2009 JANUARY FEBRUARY MARCH APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER N z caomovuzz rXc rommooumum Note The letter O and letter X are not used Page A3 Flake Ice Machines Model and Serial Number Format emeasoas2 04071280010077 AC SUPPLY VOLTAGE 115 HERTZ 60 TOTAL LOAD AMPS PHASE 1 MINIMUM CIRCUIT AMPACITY 14 1 WIRES 2 MAX FUSE SIZE OR HACR TYPE CIRCUIT BREAKER 15 0 HEATER WATTS MOTORS VOLTS RLA FLA W HP LRA 1 COMPR
66. pressure on air cooled units will vary with ambient conditions The discharge pressure on remote models should not drop below 240 PSI See Mixing Valve later in this section ALCO Manufactured Expansion Valve Model Air Water Suction Discharge Pressure PSIG Number Temp F Temp F Pressure PSIG 192 LAC 240 LAC EMF800A 90 F 70 F 48 293 70 F 50 F 42 233 50 F 40 F 37 180 110 F 100 F 57 373 EMF800W 90 F 70 F 40 250 70 F 50 F 40 250 50 F 40 F 38 250 110 F 100 F 47 250 EMF1106A 90 F 70 F 41 293 70 F 50 F 34 225 50 F 40 F 29 177 110 F 100 F 45 366 EMF1106R 90 F 70 F 41 261 268 70 F 50 F 36 209 257 20 F 50 F 40 F 33 192 240 120 F 110 F 100 F 50 364 367 ENF1106W 90 F 70 F 37 250 70 F 50 F 35 250 50 F 40 F 24 250 110 F 100 F 42 250 EMF2306A 90 F 70 F 41 316 70 F 50 F 35 247 50 F 40 F 32 211 110 F 100 F 47 396 Page F2 Flake Ice Machines Refrigeration System Refrigerant Pressures Continued The operating pressures for models utilizing the Alco thermostatic expansion valve are listed below ALCO Manufactured Expansion Valve Model Air Water Suction Discharge Pressure PSIG Number Temp F Temp F Pressure PSIG 192 LAC 240 LAC EMF2306R 90 F 70 F 40 265 266 70 F 50 F 35 217 260 20 F 50 F 40 F 33 200 263 120 F 110 F 100 F 45 365 355 EMF2306W 90 F 70 F 38 250 70 F 50 F 37 250 50 F 40 F 36 250 110 F 100 F 42 250 EMF405A 90 F 70 F 56 274 70 F 50 F 53 215 50
67. pump Then watch your gauges A rise to 500 microns in three 3 minutes or less indicates a dry system under a good vacuum If your gauge registers a more rapid rise the system either has moisture remaining or there is a leak in the system requiring a check for the leak and repair and another complete evacuation Note Seal the ends of the gauge manifold hose and pull them into a deep vacuum to determine if the leak is not in the hoses The gauge manifold should be able to hold the vacuum for three 3 minutes If the refrigeration system is extremely wet use radiant heat to raise the temperature of the system This action will cause the moisture to vaporize at less of a vacuum The use of two 2 valves one between the vacuum pump and gauge manifold and the other between the refrigerant cylinder and the gauge manifold allows you to evacuate and charge the system without disconnecting any hoses If the hoses were disconnected air or moisture will have the opportunity to enter the hoses and then the system A properly charged icemaker is a service technician s greatest ally Proper charging will allow any concern with the icemaker to be accurately diagnosed The refrigerant charge must be weighed into the icemaker either by using a charging scale or with a dial a charge The amount of proper refrigerant required for the icemaker is printed on the serial data plate attached to the icemaker and is listed on the following pages Never var
68. r journal diameter between 9831 and 9836 inches and the 72 If the evaporator wall is scored by the auger the evaporator will need to be replaced 7 SS P 2 E j NE LEES f E 2 ow j j e prs Z 4 2 lower journal diameter between 7492 and 7498 inches Upper Bearing Journal e Lower Bearing Journal Damaged or worn evaporator components will cause high auger motor amp draw and may cause the evaporator to lock up Page E5 Flake Ice Machines Drive System Bearings Water Seal and O Rings There is a bearing at the top and bottom of the auger shaft to allow the auger to rotate freely with a minimum amount of friction The lower bearing is a sealed ball bearing and the upper bearing is a tapered roller bearing Tap the upper race out of the bearing housing The bearings can be inspected once removed from the machine by turning the bearing by hand If the bearing does not turn NN smoothly it should be replaced Visually check the tapered roller bearing if it is pitted corroded or shows signs of wear it must be replaced E Upper Bearing and Race ely pe To remove the upper bearing race from the upper housing turn AN the housing over and carefully tap the race out of the housing
69. rator is starved but the suction pressure is NC higher than normal the compressor may be inefficient f 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 E and liquid refrigerant will flood back to the compressor The evaporator temperature will be higher than normal resulting in wet ice and slow M 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 Page F7 Symptom Single Evaporator Machine 1 Evaporator flooded but suction pressure too high Compressor has been checked and appears to be good Suction line at compressor may be colder than normal Evaporator starved no frost on line exiting evaporator Suction pressure low Dual Evaporator Machine 1 Evaporat
70. st 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 Components returned to the factory for warranty are tested by the factory and will not be covered under the warranty policy if they are not defective The troubleshooting trees are made of three types of boxes o QUESTION boxes Circle ask a yes no question and the answer will lead to either another question box a check box or a solution box CHECK boxes Rectangle will suggest a point to check for proper operation and will often refer you to a page in the service information sections of this manual The result of the check may lead to another box or a solution box SOLUTION boxes Triangle suggest the most likely component to cause the malfunction described in the heading of the tree When reaching a solution box DO NOT immediately assume the component is defective The final step is to verify that the component is indeed defective by using the service information in the sections that follow To use the troubleshooting trees first find the page with the heading describing the type of problem occurring Begin at the top of the page and follow the tree step by step Whena check box is reached it may be necessary to refer to another section in the manual Once a solution box is reached refer to the appropriate section to verify that the component in the solution box is ind
71. sure causes the refrigerant to cool The cooled refrigerant absorbs heat from the water in the evaporator P d a BN The flow of refrigerant into the evaporator is controlled by the temperature A 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 n am be correct before diagnosing the valve If not sure of the amount of Se charge in the system the refrigerant should be recovered and the correct SS charge weighed in If the evapo
72. the entire ice making cycle If the valves in the compressor are damaged the compressor will be unable to pump refrigerant efficiently Damaged valves may be the symptom of another problem in the refrigeration system such as liquid returning to the compressor or high head pressure Whenever a compressor is replaced it is important that the refrigerant charge be weighed in or measured and the system checked for proper operation to prevent a repeat failure An inefficient compressor will usually have a higher than normal suction pressure and a lower than normal head pressure Production will be slow and ice will be wetter than normal Check the compressor amperage draw On Machine Data Plate after the compressor has been running for five minutes If the compressor amp draw is less than 70 of the rated load amp the compressor may be inefficient These symptoms may also be caused by other problems Therefore it is important to use the troubleshooting trees when diagnosing a problem See Electrical System for more information on the compressor and compressor start components Page F1 Flake Ice Machines Refrigeration System Refrigerant Pressures The operating pressures for models utilizing the Alco thermostatic expansion valve are listed below Note that the suction pressure varies with the water and air temperature The discharge pressure on water cooled models should be adjusted to 250 PSI See Water Regulating Valve on Page F6 The discharge
73. un Is auger motor relay energized YES if used a c Auger motor defective or motor overload open Check before replacing No or there is no auger motor relay TRIPPED Check high pressure safety Reset and identi fy reason for high head pres sure Check ON OFF switch for proper NOT OK operation a O Iyl Replace ON OFF Switch OPEN Check bin control s primary and sec ondary if used should be closed Adjust as required or replace if defective CLOSED Check low temperature safety control it CLOSED Does machine should be closed have a auger Auger motor motor relay defective or motor overload open Check before replacing YES Adjust as required or replace if defec tive Relay is defective Page C4 Flake Ice Machines Troubleshooting Trees Slow Production Check condenser YES nr in gi We if necessary i Replace purge valve or remove obstruction in valve Check for air lock in evaporator feed tube AIR LOCK Replace feed tube NO AIR LOCK Is this unit air cooled or water cooled AIR Check refrigeration system See Section F WATER Check temperature of water at outlet of condenser or check head pressure See page F6 Check refrigeration
74. wn System Remote Only If a remote machine is shut down by the selector switch or bin control the liquid line solenoid valve is de energized allowing the valve to close This blocks the flow of refrigerant causing all the refrigerant to be pumped into the receiver and condenser This is done to prevent liquid refrigerant from migrating into the compressor during the off cycle which could damage the compressor on start up Also see Pump Down System in the Refrigeration Section on page F11 As the refrigerant is pumped into the receiver the suction pressure begins to drop Once the suction pressure reaches approximately 19 psi 1 7 bar the pump down control contacts open which will de energize the compressor contactor Pump Down Control The pump down control is a low pressure control that shuts the machine off when the suction pressure drops during the pump down phase The control is factory set to open at 19 psi 1 7 bar and close at 45 psi 3 1 bar The pump down control does not normally need to be adjusted however an adjustment may be made by turning the adjustment screw Page G5 Flake Ice Machines Electrical System EF250 255 405 ONE DOCERE SD COMPRESSOR JUNCTION EF450A W EM STORAGE ONLY ELECTRIC STOP LOW TEM SWITCH ONTROL SAFETY B 9 Mm 9 iA HIGH PRESSURE Em
75. y the amounts from those listed Page F13 Flake Ice Machines Refrigeration System Remote models with sixty 60 foot lineset runs will need an additional fifteen 15 ounces of refrigerant added In some cases the complete refrigerant charge may not enter the refrigeration system In those instances close the gauge manifold high side valve and disconnect the manifold from the high side port When the icemaker is completely charged secure the caps to the service ports and check to make sure the ports are not leaking refrigerant Reference Tables on Page A5 Page F14 Flake Ice Machines Electrical System OTENTIAL ELAY x ELAY Control Circuit All machines in this manual are controlled basically the same way Selector Switch The selector switch is used to start the ice making cycle or to turn the machine off The machine is put into operation by switching the selector switch to the ON position Contactor When the selector switch is in the ICE position the contactor coil is energized and pulls in the contactor contacts This energizes the compressor start components which starts the compressor 15 Compressor and Start Components The compressor should run during the entire cycle If the machine is in the ICE position but the compressor is not running check the compressor contactor to

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