Home
Scotsman Ice AFE325 Ice Maker User Manual
Contents
1. Auger coupling worn Replace coupling and adapter stand Bearings worn Replace bearings and water seal Gearmotor loose on frame Tighten bolts check grommets Low water level Check water level in reservoir Tubing vibrating Check tubing for contact Tooth on a gear missing Check gears in auger drive Compressor too loud Replace compressor Gear noise Check gearmotor for oil leak Water leaks from cabinet Evaporator water seal worn or cracked Replace seal and bearings Tubing to evaporator leaks Replace tubing fittings Drain leaks Check drain tubes and fittings External drain restricted Clean out drain No refrigeration Gearmotor does not turn Check motor Centrifugal switch does not close Check switch Fan motor does not turn Check fan motor Lack of refrigerant Add refrigerant if problem is reduced locate leak and repair it Compressor does not pump Check replace start capacitor Check replace start relay Check replace compressor August 1994 Page 17 AFE325 Removal and Replacement Water System The water system consists of the reservoir and inlet water valve Reservoir 1 Shut off the water supply 2 Remove the top panel 3 Remove the left side panel 4 Drain the water reservoir and evaporator 5 Disconnect inlet and outlet tubes from the reservoir 6 Rem
2. Remove all ice from the storage bin 22 Add warm water to the ice storage bin and ea wash and rinse all surfaces within the in 23 Sanitize the bin interior by thoroughtly washing all interior surfaces of the bin with the balance of the sanitizer solution 24 Switch the master switch ON 25 Replace the top and the front panels January 1996 Page 12 AFE325 Maintenance and Cleaning In some areas the water supply to the ice maker will contain a high concentration of minerals and that will result in an evaporator and auger becoming coated with these minerals requiring a more frequent removal than twice per year If in doubt about the condition of the evaporator and auger the auger can be removed so the parts can be inspected Note Water filters can filter out suspended solids but not dissolved solids Soft water may not be the complete answer Check with a water treatment specialist regarding water treatment For more information on removal of these parts see REMOVAL AND REPLACEMENT To Inspect The Top Bearing 1 Disconnect electrical power and shut off the water AWARNING Electrical Shock Hazard Disconnect electrical power before beginning 2 Remove the two screws from the spout at the side of the evaporator Pull the spout away from the evaporator 3 Remove screw holding spout plate to evaporator 4 Remove the snap ring and cap and remove the bolt from the ice breaker and auger
3. de mineralization Schedule amp Responsibility A Scotsman Ice System represents a sizable investment of time and money in any company s business In order to receive the best return for that investment it MUST receive periodic maintenance It is the USER S RESPONSIBILITY to see that the unit is properly maintained The following is a list of recommended maintenance that will help keep the machine running with a minimum of problems Maintenance and Cleaning should be scheduled at a minimum of twice per year ICEMAKING SYSTEM In place cleaning 1 Check and clean any water treatment devices if any are installed 2 Remove screws and remove the top and front panels 3 Move the ON OFF switch to OFF 4 Open the door to the ice storage bin and remove the ice 5 Remove the cover to the water reservoir and block the float up 6 Drain the water reservoir and freezer assembly 7 Prepare the cleaning solution Mix 4 ounces of Scotsman Ice Machine Cleaner with 1 quarts of hot water The water should be between 90 115 F Scotsman Ice Machine Cleaner contains acids AWARNING These compounds may cause burns If swallowed DO NOT induce vomiting Give large amounts of water or milk Call Physician immediately In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN 8 Slowly pour the cleaning solution into the water reservoir until it is full Wait 15 minutes then switch the m
4. meet or exceed the standards of UL NSF and CSA BACK VIEW Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way including the use of parts and of other components not specifically approved by Scotsman FRONT VIEW Scotsman reserves the right to make design changes and or improvements at any time Specifications and designs are subject to change without notice 152 CM 6 IN RECOMMENDED FOR UTILITY CONNECTIONS 102 CM 4 IN RECOMMENDED FOR AIR VENTIALTION 609 CM m 24 N 26CM 153 4IN ki LIN LEFT SIDE VIEW 838 CM 33 IN o E T 305cm12in 38 8 CM 18 4 cm 71 4 in B46 155 161N 7om 23 4in of 3 2m 11 4 in Model Dimensions Basic Condenser Min Circ Max Fuse Refrigerant Charge H xW xD Electrical Type Ampacity Size R 134a AFE325AE 1A133 x 36 146x24 115 60 1 Air Cooled 10 7 15 11 oz AFE325AE 6A 33 x 36 146x 24 230 50 1 Air Cooled 5 4 15 11 oz August 1994 Page 2 To The Installer AFE325 A professional installation of any product is critical to the long term satisfaction of the user The AFE325 is designed to be installed indoors near a drain Determine the location from the anticipated use and any options planned for This air cooled machine blows air out the back and left
5. check that the drain does not leak but drains the water rapidly 10 Replace all panels 11 Explain to the user the maintenance requirements and operation of the machine 12 Fill out the Warranty Registration and Customer Evaluation form Mail it to Scotsman 13 Leave the service manual with the owner user and explain who should be called if service is needed August 1994 Page 6 AFE325 User Operation The AFE325 is an automatic ice flaked machine All it requires is cool air clean water a drain and an adequate supply of electrical power The user must regularly sanitize and clean the machine Component Location amp Function Evaporator This is a vertical cylinder full of water and refrigerated Also in the cylinder is a slowly rotating auger The auger forces the ice up the evaporator walls and compresses it at the top The resulting flaked ice then falls by gravity into the ice storage bin Water Reservoir The water reservoir contains the inlet float valve and the water level sensor The float valve controls the flow of water into the reservoir Water Pressure Cut Out Switch The purpose of this switch is to stop the ice maker if the water supply fails Condenser The AFE325 uses an air cooled condenser It blows air out away from the fan motor The heat removed from the water is exhausted from the condenser Compressor The refrigeration system compressor provides the force to move the refrigeran
6. stand using the original bolts 7 Attach the auger to the top bearing and breaker 8 Return the auger to the evaporator and slide it down until the splines touch the coupling 9 Rotate the auger until the coupling splines align with the auger 10 Push the auger down and rotate the breaker until the screw holes line up with the pilot holes in the evaporator 11 When the auger is completely seated reinstall the breaker screws 12 Replace permagum and foam top 13 Switch on the water supply 14 Check bin cover for electrical grounds and switch on the electrical power 15 Observe operation The unit should make minimal noise while producing ice Catch first 2 minutes of ice and discard it 16 Replace the bin cover and all panels Evaporator Follow all steps to remove the auger amp bearings 1 Recover the refrigerant charge Note The refrigeration system must not remain open for more than 15 minutes 2 Unsweat suction and cap tube connections 3 Remove evaporator from the machine 4 Remove old drier 5 Install new evaporator 6 Install new HFC type drier Note The refrigeration system uses an HFC type refrigerant and MUST use an HFC type drier 7 Braze the drier connections cap tube and suction line together 8 Evacuate to 200 microns and weigh in the system charge Water Line Gear Reducer August 1994 Page 19 AFE325 Refrigeration System This ice machine uses R 134a as
7. 5 Have all of the electrical and drain connections been made Note For High Altitude Installations an Altitude Adjustment May Be Required 11 0354 01 20 Ranco brand bin thermostats only Adjustment Altitude ft Amount of above seal level adjustment from factory setting Range 2 000 35 Screw CW 4 000 90 6 000 145 8 000 190 Initial Start Up 1 Remove the following parts e Top panel Bin door e Rubber molding e Left molding cover Left track Upper front panel Upper baffle Left side panel Front louvered panel e Control box cover ethe top panel 2 Open the water shut off valve 3 Watch the water fill the reservoir Check that it flows in and fills the reservoir near to the mark molded into the side of the reservoir Check that the float shuts off the water flow when the tank is full Check for leaks Tighten hose clamps as needed 4 Plug the unit in or switch on the electrical power 5 Switch the master switch to ON 6 Let the machine operate listen for any unusual noises If needed reposition tubing amp panels to eliminate vibration After the unit has been operating for about 10 minutes there should be enough ice in the bin to test the bin thermostat 7 Pick up some ice and hold it up against the bottom of the ice thermostat tube 8 After a short time the bin thermostat should switch the machine off 9 Pour water into the bin and
8. AFE325 AFE325 Product Manual Purpose of this manual To provide detailed The refrigeration system is either air or water installation and operation instructions to give cooled and it uses R 134a as a refrigerant The insights into how the machine works to list control system uses thermostat as a bin control possible causes for problems and to suggest and a water pressure switch as the water safety procedures for specific types of service control The AFE325 is an ice maker that makes and stores flaked ice Table of Contents A Parts List and Wiring Diagram are located in the center of this manual printed on yellow paper August 1994 Page 1 AFE325 Specifications The finish for this machine is either painted enamel or stainless steel No panel kit is available to convert an enamel machine to stainless steel Scotsman ice machines like the AFE325 are designed to be installed indoors in a controlled environment The minimum and maximum operating conditions are e Minimum Air Temperature 50 F e Maximum Air Temperature 100 F Minimum Water Temperature 40 F e Maximum Water Temperature 100 F e60 Hz Voltage may vary between 104 and 126 volts e Water Pressure may vary between 20 and 80 psi Operating the machine outside these conditions constitutes misuse and voids the warranty Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance They
9. assembly to separate the ice breaker assembly from the auger Pull the ice breaker with bearing out of the top of the evaporator the auger should stay in the evaporator The bearings may be inspected for rust wear and roughness Reverse to reassemble To Inspect the Auger 1 Disconnect electrical power and shut off the water 2 Remove the two screws from the spout at the side of the evaporator Pull the spout away from the evaporator 3 Remove screw holding spout plate to evaporator 4 Pull up on cap hook located in the top of the freezer assembly to remove the ice breaker assembly auger and the top portion of the water seal 5 Inspect the auger and the water seal Clean the auger of any mineral build up Scotsman Ice Machine Cleaner and a scouring pad work well to clean the auger DO NOT USE steel wool 6 Replace the water seal see the instructions under Removal and Replacement August 1994 Page 13 AFE325 Maintenance Air Cooled Condenser Bearings 1 Disconnect electrical power AWARNING Electrical Shock Hazard Disconnect electrical power before beginning 2 Remove front louvered panel 3 Wipe the lint off the front of the condenser If needed clean the interior of the condenser 4 Use pressurized air to blow the lint from the inside of the condenser A vacuum cleaner hose should pick up most of the dust Check for interior dirt If needed use coil cleaner to de grease the con
10. aster switch to ON 9 As the ice maker begins to use water from the reservoir continue to add more cleaning solution to maintain a full reservoir 10 After all of the cleaning solution has been added to the reservoir and the reservoir is nearly empty switch the master switch to OFF 11 After draining the reservoir as in step 6 wash and rinse the water reservoir 12 Go thru steps 13 18 to sanitize the ice machine water system 13 Mix two gallons of sanitizer solution Use an approved sanitizer Apossible sanitzer solution may be obtained by mixing two gallons of warm 90 115 F potable water with 1 ounce of household bleach 14 Slowly pout the sanitizer solution into the water reservoir until it is full then switch the master switch to ON 15 As the ice machine uses water from the reservoir continue to add sanitizing solution to keep the reservoir full 16 After 1 2 of the sanitizer solution has been added to the reservoir and the reservoir is nearly empty switch the master switch OFF 17 Drain the reservoir and thoroughly wash the interior of the reservoir and cover with sanitizer solution 18 Remove the block from the float in the water reservoir 19 Switch the master switch to ON 20 Continue ice making for at least 15 minutes to flush out any cleaning solution Switch the master switch OFF DO NOT USE any ice produced from the cleaning solution Be sure no ice remains in the bin 21
11. at are carried along with the water and may be filtered out and dissolved solids those that are part of the water and have to be treated A water filter is always a good idea but does require regular maintenance to change the cartridge In some water conditions water treatment may be required Generally this means a polyphosphate feeder of some kind Water softeners are not recommended for the AFE325 Airflow Direction Cool Air In August 1994 Page 3 AFE325 For The Plumber Drains The ice maker requires a gravity drain for There are two drains and one water inlet the reservoir overflow and bin drain The pitch on connection to make the drain tubes must be at least 1 4 inch fall per foot of horizontal run On long horizontal runs a vent at the back of the cabinet will improve draining and is recommended The water inlet connection is a 3 8 male flare Water supply Route a drain line to the reservoir overflow drain hose Route a separate drain to the bin drain tube The drains are a copper bin drain tube and a rubber reservoir overflow tube Connect cold potable water to the machine A oc hand valve near the location is recommended A Route the inlet water line to the fitting on the water filter is also a good idea corner post Follow all local codes Water Inlet 3 8 Male Flare Drain 746 1 D Flexible Hose January 2005 Page 4 For The Electrician Electrical connections Follow All Local State am
12. d the centrifugal switch and remove the screw holding it to the rotor of the motor 12 Lift the centrifugal switch up and off the motor 13 Lift the motor cover up and off the motor 14 Pull the fan up and off the rotor If the windings are to be replaced remove the left side panel and control box cover 1 Locate the auger drive motor wires plugged into a relay on the circuit board 2 Disconnect the auger motor s wires and pull them back to the auger drive motor 3 Lift the auger motor windings off the gear reducer If the rotor needs to be removed 1 Run a screw into the top of the rotor 2 Grasp the screw with a grip pliers 3 Pull and or tap on the pliers to pull the rotor amp bearing out of the gear reducer 4 Inspect the bearing and input seal Replace them if worn Note When the rotor is re installed be certain that the bearing is fully seated in the gear case August 1994 Page 22 AFE325 Gear Reducer Shaft Seals 2 are used per shaft as shown Motor Cover amp Top Pees we Rotor Bearing Woodruff Key Spacer Washer Use To Adjust Height of Gears to Avoid Rubbing First Gear August 1994 Page 23
13. denser 5 Replace all panels and reconnect electrical power Auger and Bearing Inspection While in most areas regular in place cleaning with Scotsman Ice Machine Cleaner will be adequate to keep the interior of the evaporator free of excessive mineral build up some water conditions may require more intense methods In addition the auger bearings require physical inspection to determine that they are not wearing This physical inspection is recommended twice per year for the top bearing and once per year for the auger and both bearings Whenever the auger is removed replacement of the water seal is recommended If a bearing requires replacement the other bearing must also be replaced 1 Unplug or disconnect electrical power 2 Shut off the water supply 3 Remove top panel 4 Remove right side panel 5 Drain the evaporator and reservoir 6 Remove the two screws from the spout at the side of the evaporator 7 Remove screw holding spout plate to evaporator 8 Remove spout 9 Pull up on the pull ring to remove the auger If it is difficult to pull A Remove the breaker cover by taking the snap ring out B Unscrew the auger bolt C Use threaded rod or a slide hammer puller and screw into the auger slide the weight up against the stop to remove the auger If the auger still will not move bearing replacement is mandatory See Bearing Removal and Replacement August 1994 Page 14 AFE325 Mainte
14. e as a low pressure vapor At the compressor the cycle is repeated The AFE325 uses a low side pressure control as a safety it will shut the system down if the suction pressure is too low for reliable operation Evaporator Suction Line _ Compressor System Characteristics Note This ice machine has a sealed refrigeration system Tap into the system ONLY when it s absolutely necessary After tapping in recovery repair evacuation and recharging the piercing valve must be removed and the system re sealed Typical Low Side Pressure 7 10 PSIG Typical Discharge Side Pressure 130 165 PSIG Typical Auger Drive Motor Amps 60 Hz 2 8 3 1 Auger Drive Output RPM 60 Hz 9 6 System Refrigerant Charge 11 Ounces of R 134a Pressures depend upon air and water temperatures Numbers listed are for 70 F air 50 F water and 90 F air 70 F water Refrigeration System Schematic Capillary Tube Air Cooled Condenser August 1994 Page 9 AFE325 Water System Operation The water system consists of a float valve and reservoir The water level in the reservoir tank is the same level as that inside the evaporator Building water supply flows to the float valve and the float valve opens to add water to the reservoir as water flows out to the evaporator Inside the evaporator there is a water
15. en closing 1 and 2 The power for the gearmotor is then connected to a point in the series circuit ahead of the low pressure control the low water pressure control and the bin thermostat so that if any of these open the gearmotor will continue to run pushing ice out of the evaporator The refrigeration system uses a hermetic compressor specifically designed for R 134a forced draft air cooled condenser capillary tube and vertical flaked ice evaporator Inside the evaporator is a slowly rotating auger The auger is supported by bearings at each end and there is a face type water seal above the bottom bearing The auger is driven by a 1 10 HP direct drive gear reducer The auger drive motor has a speed operated switch on it that will keep the compressor from operating if the auger motor is not turning at full speed Water flows from the building supply to the reservoir Water from the reservoir is used to make ice The bin and reservoir overflow have separate drains August 1994 Page 11 AFE325 Sanitation and Cleanin Maintenance The water and ice making systems will need to be periodically sanitized and de mineralized The air cooled condenser will also need to be kept clean Detailed instructions are provided on page 14 Schedule the sanitation cleaning and de mineralization on a regular basis to keep the ice clean and the machine operating efficiently Water System The water system requires periodic sanitation and
16. er must be used 34 29 5 As with any other refrigerant do not place 35 30 4 pressurized air or oxygen into the refrigeration 40 35 0 system i E tion to 200 microns is recommended oe i eas 50 45 4 75 78 7 90 104 3 110 146 4 120 171 1 130 198 7 150 262 8 August 1994 Page 20 Gear Reducer Removal 1 Disconnect electrical power AWARNING Electrical Shock Hazard Disconnect electrical power before beginning 2 Shut off the water supply 3 Remove the top front and side panel 4 Remove the control box cover 5 Remove the centrifugal switch cover on the top of the auger drive motor 6 Disconnect the electrical wires from the centrifugal switch 7 Drain the evaporator and reservoir 8 Disconnect the water inlet tube from the evaporator 9 Remove the three screws holding the evaporator to the adapter stand 10 Lift the evaporator up high enough for the auger to clear the adapter stand 11 Remove the mounting bolts holding the gear reducer to the cabinet frame 12 Trace auger drive motor wires back to the control box 13 Disconnect the drive motor wires from the relay on the circuit board 14 Pull the wires back to the auger drive motor 15 Pull the gear reducer out the side of the cabinet to remove it from the machine Note If there is evidence of water near the output shaft of the gear reducer it would be a wise precaution to pull the auger from the evaporat
17. nance Component Inspection Auger The auger is made of stainless steel It has a polished surface that may be very shinny or dull Allow the auger to dry if mineral scale is found on the auger s surface clean off the auger with ice machine cleaner and a scrubbing pad Remove the water seal and clean off the shoulder of the auger Bearings The top bearing should spin freely with no rough spots If it feels rough when spun by hand replace it There should be minimal rust or dirt If in doubt replace the bearing The bottom bearing must be removed from the evaporator when replacing the water seal Remove the three bolts holding the evaporator to the gearmotor adapter and lift the evaporator up slightly Tap the water seal and bottom bearing out from the top down Check the bottom bearing the same way as the top Replace the water seal and install a new bearing set if needed To replace the water seal 1 Remove old rotating half from the auger Clean the mounting area 2 Place a bead of food grade sealant such as Scotsman part number 19 0529 01 onto the shoulder of the auger where the rotating half of the water seal will be installed 3 Wash the new seal in water While wet slip it onto the bottom of the auger rubber side toward the auger Push up until seated against the sealant Do not allow any sealant to come into contact with the face of the seal 4 Wash the stationary half the water seal with water Sli
18. o the low side of the refrigeration system is designed as a by pass circuit to the auger drive motor whenever the low side refrigerant pressure is at it s normal ice making range At start up the contacts between terminals 1 and 2 are open The line side power does not pass any further through the auger delay pressure control until the compressor starts and the low side pressure drops The next control the power is connected to is the Low Water Pressure Control This switch is designed to open should the water pressure to the machine drop too low The next control is the Bin Thermostat It is closed when there is no ice on the portion of the control inside the ice bin It is open when there is ice on the portion of the control inside the ice bin Closing of the bin thermostat begins the process of making ice because the line side power now goes to the compressor gearmotor and if air cooled the fan motor Power is initially connected to the gearmotor through contacts 3 and 2 of the auger delay pressure control This causes the auger motor to start and run At the same time if the centrifugal switch on top of the gearmotor closes meaning the motor is at full speed the compressor is connected to the neutral side of the power supply and the compressor begins to run As the compressor runs the low side or suction pressure begins to fall when it reaches a preset point the contacts within it move opening 3 and 2 th
19. or and check the bearings 16 Rebuild or replace the gear reducer August 1994 Page 21 AFE325 AFE325 Gear Reducer Rebuild 1 After the gear reducer has been removed the internal components may be inspected and or replaced Remove all bolts holding the two case halves together 2 Tap against the roll pins at each end of the gear cases to split them 3 Pry the case halves apart 4 Check the internal condition of the gear reducer If rusty or water is present replace the complete assembly The oil should be black and the proper oil level is 1 8 from the top of the biggest gear with all gears installed Check the input seal The gears may be replaced individually Auger Drive Motor The windings or top bearing amp cover may be replaced without removing the evaporator or gear reducer from the machine 1 Disconnect electrical power AWARNING Electrical Shock Hazard Disconnect electrical power before beginning 2 Shut off water supply 3 Remove top panel 4 Remove right side panel 5 Drain the reservoir and evaporator 6 Disconnect the reservoir outlet tube from the bottom of the reservoir 7 Remove screws holding reservoir mounting bracket to the cabinet 8 Lift the reservoir up amp away from the top of the auger drive motor 9 Remove the 4 bolts holding the auger motor cover to the gear reducer case 10 Lift the plastic switch housing off the auger drive motor 11 Hol
20. ove screws holding reservoir to its mounting bracket 7 Remove reservoir from the machine 8 Reverse to reassemble Bearings Water Seal and Auger 1 Disconnect electrical power AWARNING Electrical Shock Hazard Disconnect electrical power before beginning 2 Shut off the water supply 3 Remove the top panel 4 Remove the front and side panels 5 Drain the reservoir and evaporator 6 Remove rubber cap from the top of the evaporator 7 Remove the two bolts from the spout on the side of the evaporator 8 Remove the screw holding the bearing retainer to the evaporator 9 Pull up on the ring to lift the auger out of the evaporator If the auger will not lift out 1 Remove snap ring holding bearing cover to breaker 2 Remove bearing cover 3 Unscrew bolt holding bearing to auger 4 Thread in a threaded rod and weight or slide hammer puller into the auger 5 Use the threaded rod amp weight or slide hammer puller to remove the auger Or 1 Remove three cap screws holding evaporator to the adapter stand 2 Lift evaporator up slightly and tip the bottom out to expose the splined end of the auger 3 Use a plastic mallet or dead blow hammer to tap the bottom of the auger and force the auger up Do NOT damage the splines of the auger or the auger will have to be replaced If the auger is frozen to the bottom bearing do not force the bottom bearing thru the evaporator Replacemen
21. p National Codes Check the nameplate for voltage and current requirements An electrical cord is not supplied Connect the AFE325 to a separate electrical circuit Wiring to the machine must conform to all codes A licensed electrician may be required in some situations The electrical connection is made in the control box inside the machine This unit must be grounded Route the electrical power cord thru the corner post to the control box inside the cabinet AFE325 To make the electrical connection remove the following parts Top panel Bin door e Rubber moulding Left moulding cover Left track Upper front panel Upper baffle Left side panel Front louvered panel e Control box cover If the machine will be started up later after making the electrical connections replace all panels Control Box Cover Top Panel Ice Discharge Tube Ref Electrical Inlet Left Side Panel Front Louvered Panel Upper Front Panel 1 i Bin Door Spacer Bin Door Left Track IA Left Moulding Cover Upper Baffle August 1994 Page 5 AFE325 Final Check List amp Initial Start Up 1 Is the machine located indoors where the temperature limitations are not exceeded 2 Is there at least 6 clearance on the left side and the back of the cabinet for adequate air flow 3 Is the water supply adequate and has a shut off valve been installed 4 Is the cabinet level
22. p it up into the bottom of the evaporator until the bottom of the seal is inside the evaporator about 1 4 5 Push the bottom bearing against the water seal until the bottom bearing is inside the evaporator about 1 16 6 Replace the evaporator on the adapter and re attach the stand using the original bolts 7 Attach the auger to the top bearing and breaker 8 Return the auger to the evaporator and slide it down until the splines touch the coupling 9 Rotate the auger until the coupling splines align with the auger 10 Push the auger down and rotate the breaker until the screw hole lines up with the pilot hole in the evaporator 11 When the auger is completely seated reinstall the breaker screws 12 Replace spout and rubber top 13 Switch on the water supply 14 Observe operation The unit should make minimal noise while producing ice Catch first 2 minutes of ice and discard it 15 Replace all panels Coupling Use the grease zerk on the side of the coupling to add grease once per year That concludes normal maintenance If the fan motor has an oil plug it may be oiled after 10 years of operation August 1994 Page 15 AFE325 Service Diagnosis Problem No ice nothing is operating Possible Cause Unit has no power Probable Correction Restore power If breaker or fuse tripped check for overloaded circuit or short circuit Master switch off Switch unit on Determine why switch
23. seal This seal is the type that has a rotating half anda stationary half The area where the two seals touch are smooth flat surfaces When the auger is installed in the evaporator it forces the rotating half of the seal against the stationary half The stationary half is spring loaded and provides a firm pressure against the auger portion of the seal N Bin Thermostat Bracket Reservoir ol y Aa A JAIR Float Water Inlet _ q OOOO OQOOO6 E Water Line f Evaporator Reservoir Overflow Gear Reducer em ee es Bin Drain Water System Schematic August 1994 Page 10 AFE325 Mechanical Operation ELECTRICAL SEQUENCE There are two circuits in the AFE325 one is a series circuit with several switches connected in series to the compressor The other is a parallel branch of the series circuit controlling the gear drive motor The series circuit begins at the terminal strip in the control box From there the line side power is connected to the Master Switch e When the master switch is closed the power is then connected to the Spout Switch This switch located on the top of the ice chute is closed unless the ice chute has overfilled with ice it is a manual reset The line side power is also connected ina parallel circuit to terminal 1 of the Auger Delay pressure control This pressure control connected t
24. sides of the cabinet Do not install the machine where the air flow might be blocked The machine will require electrical power water and a drain Follow all local codes Rough in the utilities before placing the machine into position see For The Electrician and For The Plumber After uncrating install the legs or optional casters If the building s drain is a floor drain near the machine the cabinet can be placed on the floor and sealed around the edges Place the cabinet in the place where it will be operating Note that the electrical and water connections need to be made Level the unit front to back and left to right MODEL NUMBER SERIAL NUMBER A C SUPPLY VOLTAGE MINIMUM CIRCUIT AMPACITY WIRES MAXIMUM FUSE SIZE HERTZ HEATER WATTS PHASE REFRIGERANT CHARGE oz MOTORS VOLTS RLA FLA WHP LRA COMPRESSOR F ORIVE OTHER DESIGN PRESSURE Low OR HACR TYPE CIRCUIT BREAKER Oso ScOTSMAN FAIRFAX OPERATION FAIRFAX SOUTH CAROLINA U S A HIGH Nameplate Is Located ASE On The Back Panel Utility Connections Here Warm Air Out Water Quality The quality of the water supplied to the machine will directly affect the purity of the ice and the reliability of the machine While the condition of the water supplied to a building is normally out of the control of the user water can be treated at the point of use There are two major types of water impurities suspended solids those th
25. t 1 Replace the bearings and water seal Replace the auger if the splines are damaged Replace the evaporator if more than 1 3 of the vertical rifle grooves are gone Sand or hone and sand the inside of the evaporator if mineral build up is heavy Top Bearing Replacement If the inner race is secure use an arbor press to push the top bearing out of the breaker If the inner race has separated from the bearing replace the breaker Insert a new bearing in the breaker Replace the O ring in the breaker Push the bearing in push only on the outer race August 1994 Page 18 AFE325 Water Seal amp Bottom Bearing Replacement 1 Remove old rotating half from the auger Clean the mounting area 2 Place a bead of food grade sealant such as Scotsman part number 19 0529 01 onto the shoulder of the auger where the rotating half of the water seal will be installed 3 Wash the new seal in water While wet slip it onto the bottom of the auger rubber side toward the auger Push up until seated against the sealant Do not allow any sealant to come into contact with the face of the seal 4 Wash the stationary half the water seal with water Slip it up into the bottom of the evaporator until the bottom of the seal is inside the evaporator about 1 4 5 Push the bottom bearing against the water seal until the bottom bearing is inside the evaporator about 1 16 6 Replace the evaporator on the adapter and re attach the
26. t around the system Auger Drive The auger drive is a direct drive gear reducer August 1994 Page 7 AFE325 Component Location Control Box Auger Delay Pressure Control This pressure switch connected to the low side of the refrigeration system controls the auger drive motor On Off switch This toggle switch shuts off the machine It is not a complete disconnect Bin Thermostat This thermostat turns the machine on and off in response to changes in temperature of the capillary tube It opens at 35 gt F and closes at 45 F The capillary tube is mounted on the inside of the ice chute Toggle Switch Auger Delay Pressure Control Terminal Strip Bin Thermostat Control Box August 1994 Page 8 AFE325 Refrigeration System Operation The AFE325 uses a forced draft air cooled condenser capillary tube and hermetic compressor The system uses R 134a as a refrigerant High pressure high temperature refrigerant is forced thru the condenser where it looses enough heat to condense The high pressure liquid refrigerant then passes thru the capillary tube which causes a pressure drop in the evaporator As the high pressure liquid refrigerant moves into the evaporator s area of low pressure the warm water and low pressure cause the refrigerant to evaporate and absorb heat from the metal walls of the evaporator After the refrigerant has flowed thru the evaporator it goes back to the compressor thru the suction lin
27. the refrigerant This refrigerant has no chlorine and therefore requires polyolester type refrigerant oil This oil Temperature Pres ie Chart Selected Points requires specific service procedures Temperature in F PSIG of R 134a Service Recommendations 10 2 0 This ice machine has a sealed refrigeration 6 3 7 system It must not be tapped into unless 4 4 6 absolutely necessary If access is required tap into 2 55 the process tubes dead end tubing that has been pinched off and brazed shut 0 6 5 After recovery repair evacuation and re charging 1 7 0 remove the piercing valves 2 7 5 1 Pinch off the process tube below the valve 3 8 0 2 Remove the valve 4 8 6 3 Braze the end of the tube shut A L A HFC type liquid line drier is required Standard driers may not take out enough moisture and may 12 13 2 affect the oil additives 14 14 4 The time that the refrigeration system is open to 16 15 7 the air must not exceed 15 minutes The oil will 18 17 1 rapidly absorb moisture from the air and the 20 18 4 contact time must be kept to a minimum i A special or very sensitive electronic leak detector ee a will be needed to locate refrigerant leaks Many 30 26 1 are on the market that will sense R 134a 31 26 9 Recovery and vacuum equipment should use 32 27 8 polyolester oil to minimize cross contamination 33 28 6 A HFC type dri
28. was off No water water safety switch open Restore water supply Check filters or strainer Spout switch open Check bin thermostat for failure to open and shut off machine Check spout for internal pitting Bin thermostat open Check air temp it must be over 50 F for thermostat to start unit Auger drive motor will not start Check windings of auger drive motor Check for seized gears Auger delay switch open Replace auger delay No ice auger drive is operating Centrifugal switch is open Check replace switch Compressor will not start Check voltage Check start relay Check start capacitor Check compressor Lack of refrigerant Check system Locate leak Recover remaining refrigerant replace drier evacuate to 200 microns and weigh in the system charge No condensing Fan not turning or blade broken Unit will not shut off Bin thermostat stuck closed Replace thermostat Auger motor will not shut off Auger delay stuck Replace auger delay System pressures to low to switch auger delay off Check pressures If low check for restriction or leak August 1994 Page 16 AFE325 Service Diagnosis PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION Unusual noise Mineral scale in evaporator Clean water system with ice machine cleaner Auger coupling dry Grease coupling
Download Pdf Manuals
Related Search
Related Contents
FloorWarm 72137 Use and Care Manual Les quartiers en action: une approche plurielle pour un Plan d`action PRITH - Formation Auvergne DirecTV D11 User's Manual Note aux entreprises RGE titulaires d'une qualification QUALIBAT Avaya 1150E Quick Reference Guide Manual de instrucciones Copyright © All rights reserved.
Failed to retrieve file