Instruction/ maintenance manual of the product TWIN Bunn
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PR OGRAMMING MANU AL BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 41581.
Page 2 41581.2 012609 BUNN-O-MA TIC COMMERCIAL PRODUCT W ARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specified below: 2 years parts and 1 year labor . 2) Electronic circuit and/or control boards: parts and labor for 3 years.
Page 3 CONTENTS Warranty .............................................................................................................2 Introduction ......................................................................................................
Page 4 SPRA Y OZ/M: XX.X (-) DONE (+) (-) DONE (+) CALIBRA TE FLO W? NO YES BREW COUNTERS? NO YES PROGRAMMING THE BREWER PROGRAMMING FUNCTIONS - LEVEL I PROGRAMMING FUNCTIONS - FLOW CHART PROGRAMMING FUNCTIONS - LEVEL 2 BYP ASS OZ/M: XX.
Page 5 L SPR Y OZ/M: XX.X (-) DONE (+) (-) DONE (+) PROGRAMMING THE BREWER (cont.) PROGRAMMING FUNCTIONS - LEVEL I PROGRAMMING FUNCTIONS - FLOW CHART PROGRAMMING FUNCTIONS - LEVEL 2 L BYPS OZ/M: XX.
Page 6 ITB 41581.2 091609 (-) DONE (+) CALIBRA TE FLO W? NO YES BREW COUNTERS? NO YES PROGRAMMING FUNCTIONS - LEVEL I PROGRAMMING FUNCTIONS - FLOW CHART PROGRAMMING FUNCTIONS - LEVEL 2 DILUTE OZ/M: XX.
Page 7 ITCB 41581.2 091609 SPRA Y OZ/M: XX.X (-) DONE (+) (-) DONE (+) CALIBRA TE FLO W? NO YES BREW COUNTERS? NO YES PROGRAMMING FUNCTIONS - LEVEL I PROGRAMMING FUNCTIONS - FLOW CHART PROGRAMMING FUNCTIONS - LEVEL 2 DILUTE OZ/M: XX.
Page 8 Brew Lockout Enabled Enabled Disabled Disabled Set Language English English English English Units English English English English Review Recipes √ √ √ √ Assign Recipes √ √ √ √ S.
Page 9 READ Y T O BREW W A TER TEMP XXX° CARD CONT AINS RECIPE FOR (RECIPE NAME) SHO W QUIT SA VE (RECIPE NAME) NO T SA VED (RECIPE NAME) SETUP COMPLETE READ Y T O BREW W A TER TEMP 200° 5 SEC.
Page 10 PROGRAMMING WITH AD CARD Using an AD CARD to load ADS: The information is loaded into the brewer’ s memor y by holding the chip area up to the brewer’ s SENSING COIL . NOTE: Instructions to program the brewer are printed on the AD CARD . Procedure to program the AD: 1.
Page 11 PROGRAMMING FUNCTIONS - LEVEL 1 * BREW LOCKOUT This function allows the operator to prevent or allow brewing if the water temperature is less than the set READY temperature. Procedure for setting Brew Lockout: 1. T o access this function screen press and hold the right hidden button.
Page 12 PROGRAMMING THE BREWER (cont.) * UNITS This function allows the operator to select if numeric settings are displayed in English or Metric units. Procedure for setting the Units: 1. Press and hold the right hidden button until the display reads SET LANGUAGE? Press and release the right hidden button until the display reads UNITS .
Page 13 REVIEW RECIPES NO YES NO NAME COFFEE MODIFY SHO W NEXT REGULAR MODIFY SHO W NEXT (RECIPE NAME) MODIFY SHO W NEXT THA T W AS THE LAST RECIPE PRESSING NO WILL ADVANCE TO NEXT FUNCTION SCREEN BY .
Page 14 Setting Pulse Brew – EASY Pulse Brew Range: Minimum: will adjust to the minimum time required to brew that batch using the set brew volumes and flow rate for the sprayhead. Maximum – will adjust depending on se ttings and will al ways be minimum t ime + 3 minutes.
Page 15 34. When finished, press the o ther bat ch size a nd repeat step # 33. 35. When finished setting both batch sizes, press and release DONE . 36. The display should now read LAST ON: . Adjust the LAST ON TIME using (-) or (+) . If PREINFUSION is desired, set the LAST ON TIME to PreI .
Page 16 REVIEW RECIPES NO YES BREW OZ: 76 (-) DONE (+) DILUTE OZ: 320.0 (-) DONE (+) DILUTE DELA Y 00.0 (-) DONE (+) REVIEW RECIPES NO YES BREW OZ: 64 (-) DONE (+) % BYP ASS: 20 (-) DONE (+) DRIP TIME.
Page 17 PROGRAMMING THE BREWER (cont.) * ASSIGN RECIPE to or disable BREW SWITCH(S) This function allows the operator to assign a recipe to (or disable) each of the 3 brew switches (A, B, C). Any saved recipes listed under "REVIEW RECIPES" can be assigned to a brew switch.
Page 18 * SET NEW RECIPE (COFFEE ONL Y) T o set a new COFFEE recipe using a Smart Funnel and a G9-2T DBC or MHG Grinder: This function allows the operator to set BREW VOL- UMES, BYP ASS %, PULSE BREW/PREINFUSION TIMES AND DRIP OUT TIMES for each coffee name stored in the grinder’ s memor y .
Page 19 PROGRAMMING THE BREWER (cont.) * SET TEMP - ICB (MASTER TEMP - ITCB) This function allows the operator to adjust the brew water temperature in the tank. This also sets the hot water faucet dispense temperature. Procedure for setting the Set T emp Range: 185° to 205° F (85° - 96° C) 1.
Page 20 PROGRAMMING THE BREWER (cont.) 12. Select DONE . The display should now read WRITE BTM LINE? . 13. T o write the bottom line, select YES. 14. T o skip the bottom line, select NO . a. If neither a top nor bottom line was written, the display should now read ENABL SANIT A TION .
Page 21 PROGRAMMING THE BREWER (cont.) * ENABLE ENERGY SA VER This function allows the operator to enable the ENERGY SA VINGS mode function and set the idle time. Once the set idle time has expired, the operator can choose to have the heaters either turn off, or reduce the tank holding temp to 140° F (60° C).
Page 22 * REFILL Range: 0 to 155 This function allows the operator to adjust the sensitiv- ity of the refill cir cuit. This is mainly a troubleshooting feature.
Page 23 PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) PROGRAMMING THE BREWER (cont.) 2. If the actual flow rate of the nozzle is known but is different than the number on the display , use the (-) and (+) to enter the correct flow rate. 3. When finished, select DONE .
Page 24 PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) PROGRAMMING THE BREWER (cont.) * CALIBRA TE FLOW (cont.) SPRA YHEAD CAL NO YES CALIBRA TE FLO W? NO YES BREW COUNTERS CONT AINER READ Y? QUIT YES CALIBRA TE SPRA Y QUIT ST ART CALIBRA TE SPRA Y 60 SEC T O FINISH SPRA YHD OZ XX.
Page 25 NOTE: If the display is already on the DILUTION CAL screen, skip steps 2-3 and proceed directly to step 4. 2. Press and hold the right hidden switch until the display reads SET LANGUAGE. Press and release the right hidden switch until the display reads CALIBRA TE FLOW? 3.
Page 26 * BREW COUNTERS This function allows the operator to track the total num- ber of brew cycles completed, as well as the number of batches brewed using each of the brew buttons. There are (up to) six resettable counters, and one life counter that is not resettable.
Page 27 PROGRAMMING FUNCTIONS - LEVEL 2 (cont.) PROGRAMMING THE BREWER (cont.) * SET RECIPE TEMPS (ITCB only) This function allows the operator to set separate tem- peratures for each selected recipe. NOTE: Setting recipe temps will override the MASTER TEMP .
Page 28 * ASSET NUMBER This function allows the operator to enter the machine's asset number . This can be useful for tracking the usage or service of an individual machine within a group. Procedure to enter the asset number: 1. Press and hold the right hidden switch until the display reads SET LANGUAGE.
Page 29 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 T echnical Service Department.
Page 30 PROBABLE CAUSE REMEDY PROBLEM TROUBLESHOOTING (cont.) T emperature T oo Low Heating Time T oo Long Fill Time T oo Long T emp Sensor Out Of Range, Check For Bad Connections T emp Sensor Out Of Range, Check Wire For Shorts Equipment will not operate 1.
Page 31 TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY PROBLEM Check plumbing and shut-off valves Check for voltage across the termi- nals at the terminal block. T est the ON/OFF switch. Refer to the test switch procedures on page 50. T est the BREW switch.
Page 32 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Check plumbing and shut-off valves Remove the strainer and check for obstructions. Clear or replace.
Page 33 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Refill valve – Disconnect the brewer from the power sour ce and remove wires from refill valve coil. Check for continuity across the terminals of the solenoid coil. If continuity is not present, replace the refill valve.
Page 34 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water flows into tank continuously with power removed from brewer . 1. Refill valve 2. Refill probe or sensitivity set- ting 3. Control Board Foreign material lodged in valve, holding it in open state.
Page 35 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water will not heat or display shows HEA TING TIME TOO LONG. 1. Limit Thermostat 2. T emperature probe 3. T ank heaters 4. Control Board Remove power from the brewer . Check for continuity through the limit thermostat.
Page 36 No bypass water Spitting or unusual steaming from sprayhead or air vent. 1. Bypass valve 2. Recipe settings 1. Lime buildup 2. T emperature probe 3. Control Board T est the bypass valve. Refer to the test outputs procedures on page 48. Check to make sure bypass % has been set for the current recipe.
Page 37 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Inconsistent beverage level in server/dispenser Check operating water pressure to the brewer . It must be between 20 and 90 psi (138 and 620 kPa). T est the brew valve. Refer to test outputs on page 48.
Page 38 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Dripping from sprayhead. Water overflows filter . Beverage overflows server . Brewer is making unusual noises.
Page 39 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Weak beverage. BUNN paper filters should be used for proper extraction For coffee, a sufficient quantity of fresh drip or regular grind should be used for proper extraction.
An important point after buying a device Bunn TWIN (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn TWIN yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn TWIN - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn TWIN you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn TWIN will certainly help you make a decision on the purchase.
If you already are a holder of Bunn TWIN, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn TWIN.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn TWIN. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn TWIN along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
