CDS-2 CDS-3 DISCONTINUED VERSION The information in this manual is no longer current. OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 To obtain the Illustrated Parts Catalog, visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the catalog.
INTRODUCTION This equipment dispenses granita-type and cold liquid drinks on demand from separate hoppers. Operating controls are accessible only to key operators. CONTENTS Introduction & Warranty......................................................................................2 User Notices........................................................................................................3 Site Preparation, Electrical Requirements & Initial Setup....................................
USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protection. All notices are to be kept in good condition. Replace any unreadable or damaged labels. WARNING CHARGE Type R22, Amount 8.4 oz Design Pressures: High 210 Low 32 HAZARDOUS VOLTAGE DISCONNECT FROM POWER SOURCE BEFORE REMOVING! 27444.0000 12559.0003 CAUTION Instructional video that accompanies every machine should be viewed before using 28720.0000 00986.0002 27443.
USER NOTICES (cont.) AFTER CLEANING & BEFORE REASSEMBLY 1. Apply lubricant* on lip of auger seal where contact is made with cooling drum. 2. Apply lubricant* on outside surface of cooling drum seal or inside bore of hopper. 3. Apply lubricant* over o-rings on faucet spool before inserting into faucet housing. * Refer to product literature for Bunn approved lubricant. 2 CHARGE Type R22, Amount 8.4 oz Design Pressures: High 210 Low 32 27444.0000 (CDS-2 Only) CHARGE Type R404A, Amount 9.
Site preparation These dispensers are very heavy. Place them on a sturdy counter or shelf capable of supporting at least 180 lbs for the CDS2 and 250 lbs for the CDS3. They are for indoor use only. The dispenser must have at least four inches of space behind it. This space is needed for airflow, air filter removal, and cleaning. Minimal clearance is required between the dispenser sides and the wall or another appliance. The dispenser performs better if not placed near any heating appliance.
Initial setup CAUTION – The dispenser is very heavy! Use care when lifting or moving it. Use at least two people to lift or move the dispenser. 1. Set the dispenser on the counter where it will be used. The CDS-3 dispenser requires a minimum of 6.0” air clearance on both sides and at the rear of the dispenser. For optimum performance, do not let warm air from surrounding machines blow on the CDS-3 and DO NOT REMOVE VINYL DEFLECTOR.
Initial setup (cont.) 9. Align the auger shaft with the 10. Thoroughly rinse the hoppers 11. Set the lids on the hoppers. and install them over the coolflat fin of the auger. Push the Slide front-to-back or lift off for ing drums with augers. Slide augers as far as they will go filling. them into place and push them and rotate them so the flat fins down as far as they will go. are pointing up. As much as possible, keep lubricant from the inside of the hoppers.
OPERATING CONTROLS (CDS-3 Controls Illustrated) ICE CONTROLS Controls the consistency of the ice in the hoppers when the DAY/NIGHT switch is in the left “DAY” position and the ICE/OFF/NO-ICE switch is in the left “ICE” position. Turn this control clockwise to produce a coarser ice or counterclockwise to produce a finer ice. (The dispenser is set to deliver satisfactory ice at a 1:00 setting.) AUGER SWITCHES ”—” – This is the normal operating position. Energizes the auger motor when in the right position.
OPERATING CONTROLS (Cont.) TWO FLASHES EVERY FOUR SECONDS – A temperature error is being sensed. Call Bunn-O-Matic for Support. THREE QUICK FLASHES – Low auger torque is being sensed. Call Bunn-O-Matic for Support. FOUR QUICK FLASHES – High auger torque is being sensed. Call Bunn-O-Matic for Support. DAY/NIGHT TIMER The quartz driven timer offers 24-hour programming with 96 actuators that operate in 15-minute increments. All actuators can be individually set to the inside or outside position.
USING THE DISPENSER FOR GRANITA-TYPE PRODUCTS 1. 2. 3. 4. Slide the lid for the selected hopper to the front or back to gain access to the hopper. Place the premixed liquid product in the selected hopper. Simply press all switches to the center of the control drawer for granita products. a. Place the POWER OFF/ON switch in the right “ON” position. b. Place the auger switch for the selected hopper in the right “—” position. c. Place the DAY/NIGHT switch in the left “DAY” position. d.
OTHER RECOMMENDATIONS FOR YOUR DISPENSER • Whether liquid concentrate or granulated powder, all product must be thoroughly mixed BEFORE adding it to the hoppers. • For best results with granita-type products, use only products with an apparent brix of 12 or higher. Some products may work with an apparent brix as low as 9. Your experimentation with other products will be the best guide in this area. Keep the premixed liquid product refrigerated. This reduces cooling/freezing time in the dispenser.
RECOMMENDED DAILY CLEANING (SUGAR & ALCOHOL products!) NOTE – Close the control drawer before proceeding. 1. Empty all product from the hoppers. 2. The driptray should be cleaned as needed for proper presentation of the product. 3. Mix a packet of Kay-5 Sanitizer diluted with two-gallons of warm (120° F) water for each hopper. 4. Open the lids and add the solution. 5. Allow the solution to work for about five minutes with the dispenser on the ”NIGHT” position. 6.
RECOMMENDED WEEKLY CLEANING (cont.) 11. Wash all components with a wash cloth in mild hot water and detergent solution. Do not immerse hopper lids. 12. Wash the drums, hopper drip trays, top covers, and outer enclosure using a clean wash cloth that has been dampened in a mild solution of detergent and hot water. 13. Thoroughly rinse all surfaces with a clean wash cloth that has been dampened with hot water. Wipe dry with a clean dry wash cloth before reassembling the dispenser. 14.
LUBRICATION (cont.) 10. Reinstall the black plug into the faucet spool. Do not lubricate the plug. 11. Apply a thin film of lubricant to each faucet spool O-ring. 12. Slide the O-rings onto the spools. 13. Reinstall the plastic caps, 14. Plug in the hopper lid lamp 15. Assemble the drip tray. springs, spools, and metal cables. pins. Spread the dispense handles and reinstall them.
Auger assembly & DISASSEMBLY (Early Augers only) The augers may look intimidating at first glance. But there are really just a few pieces snapped together. Please familiarize yourself with this procedure. It’ll make cleaning and routine maintenance easier. The augers should be taken apart for cleaning and then reassembled for use. Short Auger Latch Auger Sections (3 req’d.) Long Auger Latch Auger Nose ASSEMBLY 1. Snap one of the auger sections to the long auger latch. 2. 3. 4.
TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department. • • • • Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. All electronic components have 120 volt ac and/or low voltage dc potential on their terminals.
TROUBLESHOOTING (cont.) PROBLEM Hopper Display Lights not on (cont.) PROBABLE CAUSE REMEDY 3. Circuit Breaker (A) The circuit breaker must not be tripped. (B) Refer to Service - Circuit Breaker for testing procedures. See page 27. Auger Motor won’t turn 4. Lamps Remove the lamps and check for continuity across the base and tip. Replace if necessary. 5.Transformer Refer to Service - Transformer for testing procedures. See page 49. 6.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY The dispenser must not be connected with an extension cord. Refer to Electrical Requirements. Compressor not running 1. Power cord (With Adjustment Board L.E.D.s ON steadily for two minutes) 2. Fuse Refer to Service - Fuse and Fuse Holder for testing procedures. See page 40. 3. Contactor Refer to Service - Contactor for testing procedures. See page 34. 4. Electronic Control Refer to Service - Electronic Control for testing procedures.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Compressor runs but will not cool 2. Air Filter or Condenser (With adjustment Board L.E.D.s flashing 3, or 4 times every 4 seconds) (cont.) 3. Refrigerant The air filter and condenser MUST be cleaned regularly. Any dust buildup will affect cooling ability. Product Won’t Freeze (A) The DAY/NIGHT Switch must be in the “DAY” position. 1. DAY/NIGHT Switch Have a qualified service person check the refrigerant charge.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE Dispenser is making unusual noises. 3. Fan Motor (Some noises are a normal occurance with this type of device. You need to become familiar with those that are normal, to determine when they have become unusual.) (cont.) 4. Auger Motor(s) Product is leaking into the inside of the drum. REMEDY Remove the air filter at the rear of the dispenser and listen for fan motor noise. Replace the motor if excessively noisy.
SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.
SERVICE(cont.) AUGER MOTORS FIG. 1 AUGER MOTORS 4. Disconnect the auger motor terminal from the terminal on the main wiring harness. 5. Remove the three remaining #8 locking screws securing the auger motor mounting bracket to cooling drum mounting bracket. 6. Remove motor with mounting bracket, drip tray, split pin and torsion spring bearing as an assembly.
SERVICE (cont.) AUGER MOTOR CAPACITOR Removal and Replacement 1. Remove the two #8 locking screws securing the auger motor cover to the cooling drum mount assy. 2. Remove the cover and set aside for reassembly. 3. Disconnect the wires from the auger motor capacitor terminals. 4. Remove the #8 locking screw on the lower right side of the auger motor mounting bracket securing the auger motor capacitor. 5.
SERVICE (cont.) 7. Pull the auger shaft assembly straight out of cooling drum. Inspect the shaft for abnormal wear or scoring. 8. From the front of dispenser, remove the seal and blue bushing from cooling drum and discard them. 9. Clean seal and busing surfaces of the cooling drum very thoroughly. All old lubricant must be removed. 10. Refer to Fig 6A and slip new blue bushing into cooling drum. Lightly lube I.D. of bushing with #M2550.0000 “Lubri-film” provided in Kit #28106.0000 (CDS-2) or #28106.
SERVICE (cont.) AUGER SHAFT ASSEMBLY(cont.) Lube about 1 1/2” of shaft and in the groove with #29563.0000 “Krytox” Lubricant Lightly lube the bushing I.D. with M2550.0000 “LubriFilm” Auger Shaft Assy Do NOT get any Lube on this surface Lube about 2.0” of shaft with #M2550.0000 “Lubri-film” P1759 P1761 FIG. 6A AUGER SHAFT BUSHING FIG. 6C MOTOR/SHAFT ASSEMBLY Open face of seal away from tool Cooling Drum Seal Seal Insertion Tool P1760 FIG.
SERVICE (cont.) AUGER ON/OFF SWITCHES FIG. 7 AUGER ON/OFF SWITCHES If continuity is present as described, the auger switch is operating properly. If continuity is not present as described, replace the auger switch. Removal and Replacement: 1. Pull the dispenser drawer out until the drawer hits the drawer stop. Using a screwdriver gently pry up on the drawer stop and remove the drawer from the dispenser. 2. Remove the four #8-32 locking screws securing the switch panel to the drawer. 3.
SERVICE (cont.) CIRCUIT BREAKER 5. Push the new circuit breaker into the opening in the component bracket until the clips snap into position. 6. Reconnect the wires to the circuit breaker. 7. Position the component bracket in chassis and secure with four #8-32 locking screws. 8. Refer to Fig. 10 when reconnecting the wires. RED from Transformer R2 2 FIG. 9 CIRCUIT BREAKER P1342 Location: The circuit breaker is located inside the dispenser on the upper left side of the component bracket.
Test Procedures: WARNING: The compressor start capacitor must be properly discharged before proceeding. SERVICE (cont.) COMPRESSOR & COMPONENTS (CDS-2) Compressor Start Relay: Refer to FIG. 12 1. Disconnect the dispenser from the power source. 2. Remove compressor terminal cover retainer (6) and compressor terminal cover (5). 3. Disconnect the black wire from the thermal overload protector (3) and white/black wire from the compressor start relay (1). 4.
SERVICE (cont.) 11. Position the component bracket in the chassis and secure with four #8-32 locking screws. 12. Reconnect tubes from the condenser and the accumulator to the compressor. 13. Evacuate the system. NOTE: When replacing the compressor it is recommended that the dryer also be replaced. 14. Recharge 120V system with 8.4 oz. of Type R22 refrigerant. Design Pressures: High 210 - Low 32 Recharge 230V system with 9.5 oz. of Type 404A refrigerant.
SERVICE (cont.) COMPRESSOR & COMPONENTS (CDS-2) (cont.) Compressor Start Relay: Refer to FIG. 12 1. Remove the terminal cover retainer (6) and the terminal cover (5) WARNING: The compressor start capacitor must be properly discharged before proceeding. 2. Disconnect the wires from the compressor start relay. 3. Pull relay (1) off of the compressor pins and discard. 4. Push new relay onto the compressor pins. 5. Refer to Fig. 14 and reconnect the wires. 6. Reinstall terminal cover (5) and cover retainer (6).
3. Disconnect the black wire to the thermal overload protector (4), the white and black or red wires to the compressor. 4. With a voltmeter, check voltage across the black wire removed from the thermal overload protector and the white wire with the ON/OFF switch in the “ON” position, DAY/NIGHT switch in the “DAY” position and the ICE/OFF/NO ICE switch in the “ICE” position. Connect the dispenser to the power source. The indication must be: a) 120 volts ac for 120 volt models.
13. Slide new compressor into position on the dispenser chassis, with the tube connections to the front. 14. Secure compressor to the dispenser chassis using four .312”-18 screws, washers and nuts. 15. Install the fan on the condenser shroud and secure with three #6 thread cutting screws. 16. Reconnect the leads on the fan to the main harness. 17. On dispensers serial number CDS0019500 - up install the contactor bracket, contactor, contactor cover and compressor wiring harness as an assembly.
SERVICE (cont.) T4 WHI from Compressor and Main Harness T4 BLK from Run Capacitor 4 COMPRESSOR & COMPONENTS (CDS-3) (cont.) Compressor Start Capacitor: WARNING: The compressor start capacitor must be properly discharged before proceeding. 1. Disconnect the two leads on the compressor start capacitor. 2. Loosen the capacitor retaining strap and remove the capacitor. 3. Securely install new start capacitor under the retaining strap. 4. Refer to Fig. 18 and reconnect the wires to the start capacitor.
SERVICE (cont.) 6. Disconnect the black wires from contactor terminals #6 & #8 (#5 & #6, CDS-3 first type contactor). 7. With ON/OFF switch in the “ON” position, connect the dispenser to the power source and check for continuity across terminals on contactor. If continuity is not present as described, on CDS-3 first type contactors, replace contactor.
SERVICE (cont.) COOLING DRUM ALIGNMENT Ledge Boss Legs FIG. 24 CHECKING ALIGNMENT FIG. 23 COOLING DRUM SHIPPING SUPPORT P1510 When in its proper position, the cooling drum will cause a slight pressure on the hopper drip tray drain hole and the two legs will be equidistant from the hopper drip tray. If adjustment is needed, remove the support and gently force the free end of the evaporator in the direction the adjustment is needed.
SERVICE (cont.) DAY/NIGHT SWITCH FIG. 25 DAY/NIGHT SWITCH If continuity is present as described, the day/night switch is operating properly. If continuity is not present as described, replace the day/night switch. Removal and Replacement: 1. Pull the dispenser drawer out until the drawer hits the drawer stop. Using a screwdriver gently pry up on the drawer stop and remove the drawer from the dispenser. 2. Remove the four #8-32 locking screws securing the switch panel to the drawer. 3.
SERVICE (cont.) DISPENSER ON/OFF SWITCH Removal and Replacement: 1. Pull the dispenser drawer out far enough to expose the four #8 -32 locking screws securing the switch panel to the drawer. 2. Remove the four #8-32 locking screws. 3. Lift switch panel with wires and L.E.D./adjustment board as an assembly. 4. Turn switch panel over and remove the wires from the dispenser ON/OFF switch. 5. Compress the clips on the back of the control panel and gently push switch through the opening. 6.
SERVICE (cont.) ELECTRONIC CONTROL Removal and Replacement: 1. Disconnect the plug from the main harness from the connector on the electronic control. 2. Remove the two #8-32 locking screws securing electronic control to the component bracket. Remove and discard the electronic control. 3. Install new electronic control using two #8-32 locking screws. 4. Reconnect the plug from main harness to the connector on the electronic control. R2 2 FIG.
SERVICE (cont.) 1 FAN 2 3 4 5 6 FIG. 30 FAN R2 2 7 P1342 FIG. 31 FAN COMPONENTS Location: The fan is located inside the dispenser chassis just in front of the condenser. 6. Remove speed nut (2) from the motor shaft. 7. Remove fan (3). 8. Remove silencer (4). 1. Condenser Shroud and Fan Assy 2. Speed Nut 3. Fan Blade 4. Silencer 5. Motor 6. Shroud/Mount 7. Condenser Shroud 9. Install silencer (4) on new motor assy. 10. Install fan (3) on new motor assy. 11. Install speed nut (2) on new motor assy.
SERVICE (cont.) FUSE AND FUSE HOLDER Fuse Holder: 1. Disconnect the wires from the rear of the fuse holder. 2. Remove nut securing the fuse holder to the component bracket. 3. Push fuse holder through the hole in the component bracket. 4. Install new fuse holder and fuse through the hole in the component bracket. 5. Secure the fuse holder to the component bracket. 6. Refer to Fig. 34 and reconnect the wires. R2 2 WHI/GRN from Main Harness/ON/OFF Switch FIG.
SERVICE (cont.) ICE/OFF/NO ICE SWITCHES FIG. 35 ICE/OFF/NO ICE SWITCHES 6. With the switch to be tested pressed down on the right side, check for continuity between the center terminal and the left terminal. With the switch pressed down to the left, check for continuity between the center terminal and the right terminal. Continuity must not be present when neither side of the switch is pressed down. If continuity is present as described, the ICE/OFF/NOICE switch is operating properly.
SERVICE (cont.) LAMP CORD ASSY FIG. 37 LAMP CORD ASSY 7. Strip the wires from the lamp holder/socket assembly approximately .375”. 8. Using the two wire nuts, supplied, connect the new lamp cord assembly to the lamp holder/socket assembly wires. 9. Reinstall the hopper liner to the bottom of the hopper cover. 10. Reinstall the hopper cover to the hopper. 11. Plug in the new lamp cord assembly to the lamp cord connector assembly on left top of the auger motor cover. 12. Refer to Fig.
SERVICE (cont.) LAMP CORD CONNECTOR If continuity is not present when lamp cord assembly is connected or continuity is present when lamp cord assembly is not connected, replace the lamp cord connector. Removal and Replacement: 1. Disconnect the lamp cord assembly from the lamp cord connector. 2. Remove the two #8-32 locking screws securing the auger motor cover the auger motor bracket/cooling drum bracket. Move cover back far enough to gain access to the lamp cord connector. 3.
SERVICE (cont.) LAMP HOLDER/SOCKET ASSEMBLY Removal and Replacement: 1. Disconnect the lamp cord assembly from the lamp cord connector assembly in the top of the auger motor cover. 2. Remove the hopper cover with the lamp cord assembly from the hopper. 3. Remove hopper cover liner from the hopper cover. 4. Cut off the closed-end splices connecting lamp cord assembly to the lamp holder/socket assembly. 5. Remove the two lamps. 6.
SERVICE (cont.) L.E.D./ADJUSTMENT BOARD 3. Lift switch panel with wires and L.E.D. /adjustment board as an assembly and turn over. 4. Disconnect the connector on the dispenser wiring harness from the pin connector on the rear of the L.E.D./adjustment board. 5. Remove the #4 keps nut from the right rear stud on the control panel and remove the green ground wire. 6. Remove the remaining five #4 keps nuts from the studs on the control panel. 7.
SERVICE (cont.) 7. Disconnect the dispenser from the power source. If the sound is heard as described and the refrigerant will not pass through the solenoid valve, there may be a blockage in the refrigerant line before the solenoid valve, or the solenoid valve may require inspection for wear, and removal of particles. If the sound is not heard as described, replace the solenoids.
SERVICE (cont.) TEMPERATURE SENSOR FIG. 46 TEMPERATURE SENSOR Removal and Replacement: 1. Remove the two #8-32 securing the auger motor cover to cooling drum mount and remove the cover. Set aside for reassembly. 2. Disconnect the plug on the temperature sensor leads from the connector on the dispenser main wiring harness. 3. Pull the temperature sensor from the tube at the top rear of the cooling drum and discard. 4.
SERVICE (cont.) TORQUE SENSOR CIRCUIT BOARD 6. Remove motor with mounting bracket, drip tray, split pin and torsion spring bearings as an assembly and set aside for reassembly. NOTE: When removing or installing the motor be sure the split pin in the motor shaft is turned to a position that will clear the torque sensor circuit board. 7. Disconnect the plug from the dispenser main wiring harness to the torque sensor circuit board. 8.
SERVICE (cont.) TRANSFORMER 8. With a voltmeter, check the voltage across the inside of lamp cord socket and the outside with the DAY/NIGHT switch in the “-” down position. The indication must be approximately 12.6 volts dc. 9. Disconnect the dispenser from the power source. If voltage is present as described, the transformer is operating properly. If voltage is not present as described, replace the transformer. Removal and Replacement: 1.
SERVICE (cont.) VOLTAGE DIVIDER (PAF Models only) 5. With a voltmeter, check voltage between J4 pin 3 and J4 pin 23 of the control board. Connect the dispenser to the power source; set the main power switch to “ON” position; set the DAY/NIGHT switch to “DAY” position. The indication must be 12 volts ac. Location: The voltage divider is located in the wiring harness, inside the chassis near the upper rear side of the component bracket. Test proceedures: 1. Disconnect the dispenser from the power source. 2.
COOLANT SCHEMATIC DIAGRAM CDS-2 51 27646 022500
28575.
29428.
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SCHEMATIC WIRING DIAGRAM FOR CDS-2 PAF L1 N COMPRESSOR ASSEMBLY K2-3 BLK K2-2 LIMIT THERMOSTAT BLK K2-5 COMP. K1-8 K1-6 WHI/BLK K2 WHI/BLK K2-1 WHI/BRN ON/OFF SW. RED GRN WHI/GRN BLK LT. AUGER SW. or VIO WHI/GRN RT. AUGER SW.
SCHEMATIC WIRING DIAGRAM FOR CDSA-2 PAF GRN/YEL L1 BRN L2 BLU EMI FILTER BLK WHI COMPRESSOR ASSEMBLY BLK LIMIT THERMOSTAT BLK WHI/BLK K1-8 K1-6 BLK WHI/BRN ON/OFF SW. RED WHI/BLK WHI/GRN LT. AUGER SW. or VIO WHI/GRN RT. AUGER SW.
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