JDF-2S JDF-4S Silver Series® INSTALLATION & OPERATING GUIDE BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and manual updates.
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal servers and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor. 2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below: a) Electronic circuit and/or control boards - parts and labor for 3 years.
CONTENTS Warranty......................................................................................................................... 2 User Notices................................................................................................................... 3 Initial Set-Up & Electrical Requirements......................................................................... 4 Plumbing Requirements.................................................................................................
INITIAL SET-UP CAUTION: The dispenser is very heavy! Use care when lifting or moving it. Use at least two people to lift or move the dispenser. Place dispenser on a sturdy counter or shelf able to support at least 150 lbs. (68 kg). This dispenser is designed for indoor use only. Set the dispenser on the counter where it will be used. This dispenser requires a minimum of 4 inches (102 mm) of air clearance at the rear and 8 inches (203 mm) of air clearance above the dispenser.
DOOR COVER INSTALLATION 1. Install door cover by first plugging the door harness connector into the machine harness connector located at the bottom of the machine door. JDF-2S JDF-4S P3577 2. On Portion Control models, connect membrane switches to Door Circuit Board. 3. Install door cover JDF-4S Shown JDF-2S & JDF-4S P3578 4. Secure the door cover using 5 screws provided. JDF-2S JDF-4S P3579 5 P3840 44744.
PLUMBING HOOKUP The plumbing connection is located on the rear of the dispenser. A 3/8" (9.52 mm) male flare adapter fitting is supplied, installed on the rear of the dispenser. NOTE - Water pipe connections and fixtures directly connected to a potable water supply shall be sized, installed and maintained in accordance with federal, state and local codes.
INITIAL FILL (Continued) 7. Turn ON the refrigeration switch near the main control board (Fig. 7). This will start the water bath pump circulation. 8. Check water level in the overflow tube and top off the tank if necessary (Step 5). 9. Disconnect the fill tube and allow excess water to drain into the drip tray. Replace the plug in the end of the fill tube and store back into the dispenser. 10. Set the Program Switch (near main control board) to the OFF position.
OPERATING CONTROLS Refrigeration Switch The refrigeration switch is located on the Electrical Panel of the dispenser near the Circuit Board. This switch controls power to the water bath pump and relay contacts for the compressor and condenser fan motor. FIG 7 Refrigeration Switch Product Dispense Switch (Mechanical Switch Machines) Pressing and holding switch will initiate product flow from the respective nozzle; releasing the switch will stop the flow.
OPERATING CONTROLS (Continued) Product Dispense Switch (Membrane Switch Machines) A. Product Dispense Switch Momentarily pressing and releasing one of the switches will initiate a timed dispense. Each station has three different timed dispenses which are preset at the factory. Refer to DISPENSER USE section for preset volumes and adjustment procedures. B. Plus/Stop Switch This switch can be used to “top-off” a beverage.
OPERATING CONTROLS (Continued) DISPENSER USE Press and Hold Dispensing: 1. Place a cup on the drip tray beneath the desired dispensing nozzle. 2. Press and hold the “Product Dispense” switch until the beverage reaches the desired level, then release. Portion Control Option (Mechanical Switch Machines) The dispenser is also equipped with a portion control option. The following steps will guide you through the set up process for this option. Portion control can be set on one or all dispense heads as needed.
OPERATING CONTROLS (Continued) Procedure to return all dispense heads back to Push and Hold mode (Mechanical Switch Machines): 1. Unplug dispenser from power source. 2. Place Program switch in the ON position. 3. Remove drip tray and splash panel from the front of the machine then replace the drip tray. 4. For the JDF-2S, press and hold either dispense switch while plugging the dispenser into the power source.
CLEANING & PREVENTIVE MAINTENANCE Daily: Rinse Procedure Tools required: 32 oz. (946 ml) minimum empty container 1. Open dispenser door. Lift up on product containers and remove them from the machine. 2. Close the door, place an empty container under the dispensing nozzle. 3. Dispense from each station until clear water flows from the dispense nozzle. 4. Open dispenser door and reconnect all product containers. Daily: Parts Washing 1.
CLEANING (cont) Monthly: Clean Condenser Coils and Filter 1. Removable filter can be cleaned in warm soapy water. 2. Use a soft bristle brush to clean the build up of dirt in the condenser. Annually: Check water level in ice bath. Top off if needed. Annually: Replace Pump Tubing 39690.0000 39688.0000 Tube Kit JDF-2S & JDF-4S Tube Assembly 1. Open dispenser door. 2. Remove all product containers and place them in a refrigerated (35-40 degrees F [1.6-4.4 degrees C]) environment.
ADJUSTMENT & OPTIONAL SETTINGS Water Flow Testing and Adjustment NOTE: Purge all dispense stations to remove air from water line before making initial adjustments. 1. Place a graduated measuring cup or the large chamber of the empty brixing cup (BUNN-O-MATIC part number 33095.0000) under the appropriate dispense nozzle. Place the Program switch in the ON position. 2. Press and release the desired “Product Dispense Switch” three times.(On Portion Control models, use the plus/stop switches) 3.
LOADING Frozen Concentrates 1. Thaw the frozen concentrate in a refrigerated 35-40 degrees F (1.6-4.4 degrees C) environment for 36 to 48 hours before use. NOTE: Loading frozen concentrate in the product cabinet may cause damage to the machine. This damage is not covered by warranty. 2. Thoroughly mix the thawed concentrate by vigorously shaking the product container. 3. Open the dispenser door. 4.
ADJUSTMENT & OPTIONAL SETTINGS (cont) Total Dispense Ratio Set Up Procedure 1. Adjust water flow as described in Water Flow Testing and Adjustment. Record water output setting for later reference on each dispense head. Suggested target is 3 ounces. 2. Place the Program switch in the ON position. 3. Place a measuring container under the dispense nozzle, press and release the DISPENSE button 6 times. NOTE: For best results, discard the first sample and measure a second sample.
ADJUSTMENT & OPTIONAL SETTINGS (cont) Temperature Compensated Refractometer Method 1. Adjust the water flow as described in Water Flow Testing and Adjustment. 2. Place an empty container under the appropriate dispense nozzle. 3. Press and hold the “Product Dispense Switch” Figs 9 & 10, until water and concentrate begin flowing freely from the dispense nozzle. 4. Discard the product caught previously and place the empty container back under the dispense nozzle. 5.
FUNCTION LIST Circuit Board LED Indicators - JDF-2S (Early Models) LED # 1 LED Color 2 Cabinet Red Illuminates: Green When the compressor should be ON. When the cabinet temperature is above 50 degrees F. Flashes slowly when cabinet temperature exceeds 50 degrees F for 4 hours. Dispense functions are locked out under this condition. Power down the dispenser to reset. Flashes rapidly if dispense is attempted in lockout condition.
FUNCTION LIST (Continued) Circuit Board LED Indicators - JDF-4S and Late Model JDF-2S LED # LED Color 1 Bath Red Illuminates: Open bath thermistor circuit will flash #1 and #2 LED’s 1 time every 3 seconds. The compressor will not run under this condition. Shorted bath thermistor circuit will flash #1 and #2 LED’s 2 times every 3 seconds. The compressor will not run under this condition. When bath temperature is above 34 degrees F.
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 120-240 volt ac and low voltage dc potential on their terminals.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Refrigeration Dispense stations not working. Note: Cooling failure or excessive bath and cabinet temperatures for more than 4 hours will result in dispense lockout or no dispense. 1. Compressor ON/OFF switch. Check for "ON" position or no continuity - replace switch. 2. Dirty condenser filter or fins. Clean filter and fins or replace condenser filter. (Filter not supplied on some machines). 3. Condenser fan not running.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Dispense station not working 1. Dispense Lockout switch set to OFF position. Place switch in ON position. 2. Dispense switch failed Check switch and harness for proper continuity. Main water supply Check for ON position. Frozen bath A) Compressor relay/contacts shorted - replace relay. All stations dispense concentrate only B) Recirculating pump - replace or check for kinked flex line.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Dispense station concentrate only Water solenoid Replace solenoid (24vdc) or check wire connection between water valve and main control board. Dispense station water only Concentrate out Replace refill concentrate container or BIB Product pump not pumping Check for proper counterclockwise rotation of pump rollers. If counterclockwise, replace pump tubing. If clockwise, wire connection to pump is reversed. Switch wires on terminals.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water leak filling drip tray or around dispense deck area 1. Initial fill/setup Some expansion normal. May fill drip tray during initial ice block formation 2. Dispense deck Inspect or replace fittings clamps, o-rings, solenoids and quick disconnect fittings. NOTE: Dispense deck area slopes to drain tube that leads to the drip tray. 3. Water pressure greater than 100psi Install water pressure regulator and reduce to 50 psi. 1.
TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Unit is not working 1. Step-down transformer. Check for 120/24 or 230/24 vac. If no 24vac reading, replace step-down transformer. 2. Main control board. If 24 vac present and no LED’s lit, replace control board.. 1. Product viscosity or too cold. Thorough thaw of product before use (35° - 40°) 2. Low water pressure. Maintain 20 psi or higher and a minimum flow rate of 3 fl oz/sec. 3. High water pressure.
CONDENSER FILTER DRYER SUCTION ACCUMULATOR COMPRESSOR PROCESS TUBE EVAPORATOR COOLANT SCHEMATIC DIAGRAM 26 44744.
SCHEMATIC WIRING DIAGRAM JDF-2S (Models with LED Lited Doors) 120V MODELS 220-230V MODELS L1 N EMI FILTER A B BLK L O A D WHI/BLU L I N E BLK GRN A B WHI TRANSFORMER BLU WHI/BLU L O A D L I N E A B BRN/WHI B TRANSFORMER WHI/GRN A WHI Models with Dual Dispense Option BLU BRN BLU GRN/YEL GND L1 N BLK WHI COMPRESSOR ASSY BLU/BLK COMPRESSOR MOTOR WHI WHI WHI RED/BLK SOL YEL YEL SOL RED ORN WHI/ORN WHI/BLU BLU J7-1 J7-2 GRY WHI/BLK J9-1 J9-2 BLK or ORN WHI RED BLK F
SCHEMATIC WIRING DIAGRAM JDF-2S (Models with Flourescent Lited Doors) 120V MODELS 220-230V MODELS L1 N EMI FILTER A B BLK BLU L O A D L I N E BLK GRN A B WHI TRANSFORMER BLU WHI/BLU L O A D L I N E A B BRN/WHI B TRANSFORMER WHI/GRN A WHI Models with Dual Dispense Option WHI/BLU BRN BLU GRN/YEL GND L1 N BLK WHI COMPRESSOR ASSY BLU/BLK COMPRESSOR MOTOR WHI WHI WHI RED/BLK J2-6 RED ORN WHI/BLU 12 BLU J6-1 J6-3 WHI/BLU J12-1 BLU J12-3 t WATER BATH THERMISTOR t CABIN
SCHEMATIC WIRING DIAGRAM JDF-4S (Models with LED Lited Doors) 120V MODELS 220-230V MODELS L1 N BRN BLU GND L1 N GRN/YEL GRN B A B BLK WHI EMI FILTER A TRANSFORMER BLK WHI/BLU L I N E L O A D L I N E COMPRESSOR ASSY BLU/BLK WHI RUN MOTOR WHI REFRIGERATION SWITCH CONDENSOR FAN RED/BLK BLK WATER INLET VALVE K1 WHI RECIR.
SCHEMATIC WIRING DIAGRAM JDF-4S (Models with Flourescent Lited Doors) 120V MODELS 220-230V MODELS L1 N GND L1 N BRN BLU GRN/YEL GRN B A B BLK WHI EMI FILTER A TRANSFORMER L I N E L O A D L I N E BLK COMPRESSOR MOTOR WHI REFRIGERATION SWITCH RED/BLK BLK WATER INLET VALVE RED STATION 4 DISPENSE RED VIO PUMP ORN PUMP WHI/VIO 1 VIO WHI/ORN YEL STATION 3 DISPENSE WHI/VIO STATION 4 DISPENSE YEL SOL YEL RED ORN WHI/ORN SOL TAN WHI/GRN GRN PNK GRY BLU TAN PNK BLU GRY t t J6-
QUICK SETUP GUIDE - JDF-2S and JDF-4S (JDF-2S shown) P3577 1. Install door cover by first plugging the door harness connector into the machine harness connector located at the bottom of the machine door. 2. Install door cover. 4. Place refrigeration switch in the OFF position. 5. Connect water supply to machine. (See Plumbing Requirements) 6. Connect power supply to machine. (See Electrical Requirements) 8. Place the program switch in the ON position. 9.
