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- Operating & Service Manual
Bunn TB3 Operating & Service Manual
Summary of TB3
Page 1
Tb3 tb3-lp operating & service manual bunn-o-matic corporation post office box 3227 springfield, illinois 62708-3227 phone: (217) 529-6601 fax: (217) 529-6644 37235.0000d 05/06 ©2004 bunn-o-matic corporation www.Bunn.Com.
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Page 2 contents introduction ..................................................................... 2 warranty .......................................................................... 2 user notices ..................................................................... 3 electrical & plumbing requir...
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Page 3 #00831.0000 #00656.0000 #03408.0000 #03409.0000 user notices carefully read and follow all notices on the equipment and in this manual. They were written for your pro- tection. All notices on the equipment should be kept in good condition. Replace any unreadable or damaged 37235 050205 #37881...
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Page 4 electrical requirements caution - the brewer must be disconnected from the power source until specifi ed in initial set-up. 120v model brewers require 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 hz. "a" model brewers require 2-wire, grounded service rated 230 volts a...
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Page 5 initial set-up caution - the brewer must be disconnected from the power source throughout the initial set-up, except when specifi ed in the instructions. 1. Remove the top lid from the brewer. 2. Rotate the control thermostat knob fully counterclockwise to the "off" position and replace the t...
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Page 6 initial set-up (cont.) 37235 050205 21. When all water stops fl owing, check the water volume in the dispenser. It should be 396 ounces. 22. If not, unplug the brewer and remove the top lid. 23. Adjust the dilution knob of the timer on the right side of the hood as required. Replace the top l...
Page 7
Page 7 37235 050205 auto sweetener set-up caution - the brewer must be disconnected from the power source throughout the initial set-up, except when specifi ed in the instructions. 1. Remove the top lid and rear panel. 2. Make sure the brewer water supply is off. 3. Connect sweetener hose from the b...
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Page 8 37235 080204 cleaning caution - clean and sanitize your iced tea brewer daily 1. Remove and thoroughly clean the entire brew funnel. The funnel tip and screen must be free from any tea particles or residue. Reassemble the funnel. 2. Place the on/off switch in the "off" position. Remove and th...
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Page 9 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 ...
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Page 10 troubleshooting (cont.) problem probable cause remedy brew cycle will not start (cont.) water is not hot dilution cycle will not start 4. On/off switch 5. Start switch 6. Brew timer 7. Brew solenoid valve 8. Internal flow control (.195 gpm) 1. Limit thermostat caution - do not eliminate or b...
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Page 11 troubleshooting (cont.) problem probable cause remedy dilution cycle will not start (cont.) inconsistent beverage level in dispenser consistently high or low beverage level in the dispenser 4. Dilution solenoid valve 1. Internal flow control (.195 gpm) 2. Syphon system 3. Lime build-up cauti...
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Page 12 troubleshooting (cont.) problem spitting or excessive steaming drip-out time too long dripping from sprayhead water flows into tank continu- ously (on/off switch "on") or (unsweet/off/sweet switch in "unsweet" or "sweet" position) water flows into tank continu- ously (on/off switch "off") or...
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Page 13 troubleshooting (cont.) problem beverage overfl ows dispenser weak beverage probable cause 1. Dispenser 2. Brew timer 3. Brew solenoid valve 4. Dilution timer 5. Dilution solenoid valve 1. Filter type 2. Tea 3. Sprayhead 4. Funnel loading 5. Water temperature remedy the dispenser must be com...
Page 14
Page 14 remedy the bunn ® paper fi lter must be centered in the funnel and the bed of grounds leveled by gently shak- ing. The nut on the solenoid(s) must be tight or it will vibrate during operation. Plumbing lines should not be rest- ing on the counter top. (a) the brewer must be connected to a co...
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Page 15 service this section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to troubleshooting for assistance in determining the cause of any problem. Warning - inspection, testing, and repair of electri- cal equipmen...
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Page 16 service (cont.) brew solenoid valve 4 2 3 1 m m in ut es m in ut es de la y de la y d il ut io n bu nn -o -m at ic p/ n 33 55 5 3 6 4 7 5 6 6 7 8 fig. 2 brew solenoid valve p3040 location: viewing the brewer from the rear the brew sole- noid valve is mounted on the left side of the mounting ...
Page 17
Page 17 service (cont.) control thermostat 4 2 3 1 mi nu te s m in ut es mi nu te s m in ut es de la y d il ut io n de la y d il ut io n bu nn -o- m at ic bu nn -o -m at ic p/ n 33 55 p/ n 33 55 5 3 6 4 7 5 6 6 7 8 fig. 4 control thermostat p3040 location: the control thermostat is located inside ho...
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Page 18 service (cont.) digital brew timer 4 2 3 1 m in ut es m in ut es m in ut es m in ut es de la y d il ut io n de la y d il ut io n bu nn -o -m at ic bu nn -o -m at ic p/ n 33 55 p/ n 33 55 5 3 6 4 7 5 6 6 7 8 fig. 6 digital brew timer p3040 location: the timer is located in the hood, on the le...
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Page 19 to increase a brew volume, place the on/off switch in the "on" position, press and hold the start switch until three clicks are heard. Release the switch and press it again one or more times. (failure to re- lease the switch within two seconds after the third click causes the volume setting ...
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Page 20 service (cont.) dilution solenoid valve 4 2 3 1 m in ut es m in ut es de la y d il ut io n bu nn -o -m at ic p/ n 33 55 5 3 6 4 7 5 6 6 7 8 fig. 8 dilution solenoid valve p3040 location: viewing the brewer from the rear the dilution sole- noid is mounted on the center of the solenoid mount- ...
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Page 21 service (cont.) dilution timer 4 2 3 1 m in ut es m in ut es m in ut es m in ut es de la y d il ut io n de la y d il ut io n bu nn -o -m at ic bu nn -o -m at ic p/ n 33 55 p/ n 33 55 5 3 6 4 7 5 6 6 7 8 fig. 10 dilution timer p3040 location: the dilution timer is located inside the hood on t...
Page 22
Page 22 service (cont.) limit thermostat 4 2 3 1 m in ut es m in ut es m in ut es m in ut es de la y d il ut io n de la y d il ut io n bu nn -o -m at ic bu nn -o -m at ic p/n 3 35 5 p/ n 33 55 5 3 6 4 7 5 6 6 7 8 fig. 12 limit thermostat p3040 location: the limit thermostat is located inside the hoo...
Page 23
Page 23 start switch fig. 14 start switch p3034 location: the start switch is located in the front of the hood, above and to the right of the brew funnel. Test procedure: 1. Disconnect the brewer from the power source. 2. Remove the wires from all four terminals. 3. Check for continuity across the t...
Page 24
Page 24 fig.17 on/off switch terminals p1282 blk to power cord (100v & 120v models blk to power connector (230v models) whi/vio to dilution timer whi/vio whi/vio to brew timer tl1 whi to dilution timer tl2 (100v & 120v models) red to dilution timer (230v models) 37235 050205 service (cont.) on/off s...
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Page 25 fig.19 unsweet/off/sweet switch terminals p1763 37235 050205 service (cont.) unsweet/off/sweet switch (sweetner option) fig. 18 unsweet/off/sweet switch p3034 location: the unsweet/off/sweet switch is located in the front of the hood, above and to the left of the brew funnel. Test procedure:...
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Page 26 service (cont.) sweetner solenoid valve fig. 20 sweetner solenoid valve p3298 fig. 21 solenoid valve terminals p2843 37235 050205 whi/vio to brew solenoid whi/vio to brew timer tl1 brn/whi to selector switch location: viewing the brewer from the front, the sweetener solenoid is mounted on th...
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Page 27 service (cont.) tank heater fig. 23 tank heater terminals p1284 4 2 3 1 m in ut es m in ut es m in ut es m in ut es del ay d ilu ti on de la y d il ut io n bu nn -o -m at ic bu nn -o -m at ic p/ n 335 5 p/ n 33 55 5 3 6 4 7 5 6 6 7 8 fig. 22 tank heater location: the tank heater is located i...
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Page 28 schematic wiring diagram tb3, tb3b, tb3-lp optional ready indicator switch & thermostat limit thermostat "keep warm" heater on/off switch 37234.0000c 05/06 © 2004 bunn-o-matic corporation start switch dilution timer dilution sol 1 sol 2 brew timer brew tank heater blu blu/blk blk blk blk blk...
Page 29: Schematic Wiring Diagram
Page 29 27432.0000e 08/04 © 1996 bunn-o-matic corporation brn/whi whi/blu whi/vio whi whi whi/blu whi/yel whi/orn schematic wiring diagram tu3, tb3 w/sweetener 120 volts ac 2 wire single phase ready indicator blu/blk blk selector switch unsweet/off/sweet 37235 050205.
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Page 30 schematic wiring diagram tb3a optional ready indicator switch & thermostat limit thermostat "keep warm" heater on/off switch 37234.0005a 05/05 © 2005 bunn-o-matic corporation start switch dilution timer dilution sol 1 sol 2 brew timer brew tank heater blu blu/blk blk blk blk blk 5 4 3 2 1 5 ...
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Page 31 ! "2%7 $),54)/. $),54)/. 4)-%2 100 volts ac 120 volts ac 2 wire single phase 3#(%-!4)# 4"" /04)/.!, 2%!$9 '2. . , 7() 7() 7() 7() 7() 7()6)/ 7()6)/ 7()6)/ 7()/2. 7()'2. 7()9%, 7()6)/ 7()6)/ 7() "2%7 4)-%2 ",+ ",5",+ ",5 ",+ ",+ ",+ 0.+ 0.+ 0.+ '29 '29 '29 '2. 2%$",+ 7()",5 ,)-)4 4(%2-/34!4 3...