Bunn nitron 2, Installation & Operating Manual

Page 1: ...vision 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 For Technical Service contact Bunn O Matic Corporation at 1 800 286 6070 54261 0001A 09 17 2017 Bunn O Matic Corporation ...

Page 2: ...atements by such individuals whether oral or written do not constitute warranties and should not be relied upon If BUNN determines in its sole discretion that the equipment does not conform to the warranty BUNN at its exclusive op tion while the equipment is under warranty shall either 1 provide at no charge replacement parts and or labor during the applicable parts and labor warranty periods spec...

Page 3: ...gs 16 Loading 17 Priming 17 Fault Codes 19 Troubleshooting 20 Coolant Diagram 31 Schematic Wiring Diagram 32 54261 0001 090817 INTRODUCTION The cold draft dispenser and door have been shipped in one complete package the door is in its own pack age inside the larger box To prevent damage the door should remain in its individual packaging until it is ready for installation This package also includes...

Page 4: ...tional Code Council and the Food Code Manual of the Food and Drug Administration FDA this equipment must be installed with adequate backflow prevention to comply with federal state and local codes For models installed outside the U S A you must comply with the applicable Plumb ing Sanitation Code for your area Artwork for P N 00656 0001 Artwork Rev A Drawn REF Date 04 22 10 CHARGE Type R134A Amoun...

Page 5: ...th reduced physical sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved Children under the age of 18 years should be supervised to ensure they do not play with the appliance If the power cord is ever damaged it must be replaced by the manufacturer or a...

Page 6: ...ounding machines blow on the dispenser As directed in the International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Administration FDA this equipment must be installed with adequate backflow prevention to comply with federal state and local codes For models installed outside the U S A you must comply with the applicable Plumbing Sanitation Code for...

Page 7: ...d is in the OFF position 4 Connect the dispenser to the power source 5 If plumbing is to be hooked up later be sure the dispenser is disconnected from the power source If plumbing has been hooked up the dispenser is ready for Initial Fill PRODUCT CONCENTRATE REQUIREMENTS The dispenser works with a range of concentrates Some dispensers will dispense a range of 4 1 to 12 1 and some dispensers will d...

Page 8: ...er into a 120V power source Set the dispense switch to the ON position The water bath will fill automatically when dispenser is provided power and water program mode OFF and dis pense switch ON NOTE There will be a flashing red LED light at the top center of the door s artwork This light indicates there is currently no Nitrogen coming into the dispenser via a pressure detect switch This switch wil...

Page 9: ...stments to pump speed to achieve the de sired Brix target of the product 12 Turn on the Nitrogen gas supply by opening the valve on the tank and setting the tank s output pressure to 125 psig For best drink consistency and nitrogen in fusion the nitrogen supply pressure to the machine should be set to 125 psi and maintain 10 psig from the 125 psi pressure set point Verify that the regula tor s out...

Page 10: ...cover and secure the door cover us ing 5 screws provided 3 Connect tapper handle switches to harness in door NOTE Connect left switch to blue wires and right switch to red wires 5 Mount tapper handles through bottom of door as shown using the screws provided 6 Install black hole cover as shown 4 Slide tapper handle into door assembly 54261 0001 090817 ...

Page 11: ...as the bath starts filling 6 Replace the splash panel and drip tray 7 It will take several hours to create the ice bank required for full dispenser performance During this time some further trickling from the water bath is expected due to expansion caused by ice bank formation While the refrigeration system is creating the ice bank the dispenser may be readied for use as described in Loading Primi...

Page 12: ...lectrical 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 Product Dispense Tap Handles Pulling and holding tap handle will initiate product flow from the respective nozzle releasing the tap handle will stop the flow 54261 0001 090817 ...

Page 13: ...itch This switch is located inside the door at the top It is used to turn ON and OFF the Dispensing function It is also used for fill procedures Program Switch Program Switch This switch is located near the main control board next to the refrigeration switch 54261 0001 090817 ...

Page 14: ...tream out of the nozzles runs clear about 30 seconds NOTE the dispenser will not allow all stations to run at the same time 5 Once this is completed remove the container s and empty 6 Remove each dispense nozzle and Nitro Stout Insert Run under hot tap water to remove excess product build up 7 Prepare 2 5 gal 9 46 L of sanitizing solution by dissolving 1 packet of Kay 5 sanitizer into 2 5 gal 9 46...

Page 15: ...rk surface 9 Close the dispenser door 10 Remove the 4 screws securing the pump head 11 Gently pull the pump head apart 12 Gently pull the pump tube from around the pump s rotor 13 Release the clamps securing the old pump tubing to the plastic elbows 14 Pull the plastic elbows from the old pump tubing and discard the old pump tubing 15 Insert the plastic elbows into the new pump tubing and secure i...

Page 16: ...ratio 6 Repeat steps 1 through 5 as necessary until the correct water flow rate is achieved 7 Place the Program switch back into the OFF position ADJUSTMENT OPTIONAL SETTINGS Pump Speed Adjustment 1 Disconnect the dispenser from the power source 2 Remove the drip tray 3 Remove the two screws securing the splash panel and remove the splash panel 4 Locate the adjustment knobs on the circuit board NO...

Page 17: ...his temperature range especially below may produce an out of ratio drink Ambient Concentrates Optional 1 Install an Ambient Concentrate Conversion Kit BUNN O MATIC part number 33699 0002 per the instruc tions provided in the kit 2 Attach the concentrate product hose to the appropriate concentrate line located at the rear of the dispenser 3 Attach the other end of the product hose to the product co...

Page 18: ...a refractometer Best practice is to allow samples dispensed with nitrogen to settle before taking a measurement Once a sample is placed on the refractometer wait until it reaches temperature to determine current Brix measurement about 1 2 minutes Many refractometers include a thermometer on board and will help indicate that the sample is at room temperature and ready to be tested See refractometer...

Page 19: ...pense functions Possible Cause s Cabinet fan not running Water bath pump not running Check compressor WB pump switch to confirm it is On Water bath is low Troubleshoot by powering the dispenser down and back up to reset the fault 5 Left Concentrate Pump Stalled 5 flashes of the door mounted LED s This fault will reset itself after 5 seconds Possible Cause Peristaltic pump failed or stalled 6 Right...

Page 20: ...void twists and kinks in the tubing Make certain that all plumbing connections are sealed and electrical connections tight and isolated WARNING Exercise extreme caution when servicing electrical equipment Unplug the dispenser when servicing except when electrical tests are specified Follow recommended service procedures Replace all protective shields or safety notices Cold Water Circulation Dispen...

Page 21: ...rty con denser filter or adequate ventilation and space around machine Checkrefrigerationsystemforleaks and proper charge Check Dispense switch is set to ON and sight gauge shows full water bath If sight gauge is low press Dispense switch to OFF Wait a few seconds Press Dispense switch to ON Bath will automatically start filling water bath after 30 seconds 1 Compressor ON OFF switch 2 Dirty conden...

Page 22: ...lve failed A Set switch to ON position B Check switch and harness for proper continuity Check all previous items that pre tain to refrigeration or cold water recirculation Place switch in ON position Checkswitchandharnessforproper continuity Check for ON position A Compressor relay contacts shorted replace relay B Recirculating pump replace or check for kinked flex line A Check for 120V or 230V po...

Page 23: ... pump rollers If coun terclockwise replace pump tubing If clockwise wire connection to pump is reversed Switch wires on terminals A Check speed setting on circuit board and increase speed turn clockwise B Check for d c power to pump motor If yes replace motor assy If no check harness for proper con tinuity Then replace circuit board if needed Water solenoid Concentrate out Product pump not pumping...

Page 24: ...l May fill drip tray during initial ice block formation Inspect or replace fittings clamps o rings solenoidsandquickdiscon nect fittings NOTE Dispense deck area slopes to drain tube that leads to the drip tray Installwaterpressureregulatorand reduce to 50 psi A Check all internal water connec tions B Check internal plumbing con nections C Check bath float switch Check for routing of condensation t...

Page 25: ...e use 35 40 Maintain 30 psi or higher and a minimum dynamic flow rate of 4 5 fl oz sec Over 100 psi install a pressure regulator and set to 50 psi A Perform3secondwaterdispense test Factory setting is 133 ml in 3 second dispense B Adjust water to 133 mL 3 sec Once water is set adjust motor speed to achieve brix degrees Check for proper brix ratio per product using Ratio method and or refractometer...

Page 26: ...t it back down prop erly Follow step by step in structions on priming product through the system 1 Waituntilsystemisfullycooled and ice bank fully formed before setting preferred N2 pressure Check Compressor switch is set to ON and sight gauge shows full water bath If water bath sight gauge is low press Dispense switch to OFF Wait a few seconds Press Dis pense switch to ON Bath will automatically ...

Page 27: ...roperly and if there s a shut off valve make sure shut off valve is open Check that water inlet pres sure has dynamic operating pressure between 30 to 90 psi If below 30 psi install water booster pump for adequate water pressure to supply line of dispenser 2 Follow set up instructions to adjust Brix 1 BIB or caddy is empty 2 Product pump tubing is worn 3 Build up is occurring in nozzle and system ...

Page 28: ...p instructions before op erating the system 1 Wait until system is fully cooled and ice bank fully formed Check Compressor switch is set to ON and sight gauge shows full water bath If water bath sight gauge is low press Dispense switch to OFF Wait a few seconds Press Dis pense switch to ON Bath will automatically start filling water bath after 30 seconds 2 Best practice is to use a chilled BIB or ...

Page 29: ...ea suring cylinder under the dis pense nozzle pull and release the tapper handle 3 times The dispenser will then dispense an amount of water for 3 sec onds If water flow rate is set too low adjust the water nee dle valve using a small flathead screwdriver and turning the needle counter clockwise c Clean the system by follow ing the Care and Cleaning in structions 1 The product pump speed is set to...

Page 30: ...luctuations in water or gas supply pressures d Ambient temperature too high or low 2 System has internal malfunc tion and needs service by a technician 1 a Install a water line that is in accordance with machine specifications b Install a gas line that is in accordance with machine specifications c Assure the unit is being fed consistent and constant gas and water pressure d Place the unit in a lo...

Page 31: ...31 COOLANT SCHEMATIC DIAGRAM CONDENSER SUCTION ACCUMULATOR COMPRESSOR EVAPORATOR PROCESS TUBE FILTER DRYER 54261 0001 090817 ...

Page 32: ...VALVE WATER BOOSTER PUMP WATER BOOSTER PUMP RELAY BRN WHI SOL BLK TRANSFORMER WHI BLU WHI BLU L O A D L I N E WHI WHI BLK K1 120V MODELS N A B A B A B L1 WHI GRN BRN WHI A B 220 230V MODELS GRN YEL N L1 GND BRN BLU EMI FILTER 120 VOLTS AC or 220 230 VOLTS AC 2 WIRE SINGLE PHASE W Tape Over Laminate Thermal Transfer Stock Black Ink Finished Size 6 5 x 6 0 40 Reduction J1 1 J1 3 J5 1 J5 5 J4 1 J4 5 ...