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- Operating & Service Manual
Bunn TB3Q Operating & Service Manual
Summary of TB3Q
Page 1
Tb3q tb3q-lp operating & service manual bunn-o-matic corporation post office box 3227 springfield, illinois 62708-3227 phone: (217) 529-6601 fax: (217) 529-6644 www.Bunnomatic.Com 37236.0000c 05/05 ©2004 bunn-o-matic corporation.
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Page 2 contents user notices .................................................................... 3 electrical & plumbing requirements ............................... 4 initial set-up .................................................................... 5 auto sweetener set-up ..........................
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Page 3 warning ! Fill water tank before turning - on - thermostat or connecting appliance to power source. Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis. Follow national/local electrical codes. Do not use near combustibles. Failure to comply risk...
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Page 4 electrical requirements caution - the brewer must be disconnected from the power source until specified 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 ac...
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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 specified 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 to...
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Page 6 37236 050305 auto sweetener set-up caution - the brewer must be disconnected from the power source throughout the initial set-up, except when specified in the instructions. 1. Remove the top lid and both rear panels. 2. Make sure the brewer water supply is off. 3. Connect sweetener hose from ...
Page 7
Page 7 adjusting brew volumes caution - disconnect the power source from the brewer prior to the removal of any panel for the replacement or adjustment of any component. Note: prior to setting or modifying batch sizes, check that the brewer is connected to water supply, the tank is properly filled, ...
Page 8
Page 8 operating controls a. On/off switch on - placing the switch in the left position allows the start switch to activate a timed brew cycle for three gallons of tea. Off - placing the switch in the right position stops the brew cycle. Stopping a brew cycle after it has been started will not stop ...
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Page 9 37236 080504 tea brewing 1. Begin each brew cycle with a clean empty brew funnel and server. (be sure the server lid doesn’t interfere with the flow of dilution water.) 2. Insert a bunn® filter into the funnel. 3. Pour the packet of loose fresh tea leaves into the filter. Approximately three ...
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Page 10 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 11 troubleshooting (cont.) problem probable cause remedy brew cycle will not start (cont.) water is not hot dilution cycle will not start inconsistent beverage level in dispenser 6. Brew timer 7. Brew solenoid valve 1. Limit thermostat caution - do not eliminate or by- pass limit thermostat or ...
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Page 12 troubleshooting (cont.) problem probable cause remedy consistently high or low beverage level in the dispenser spitting or excessive steaming drip-out time too long sweetener is not working 1. Strainer/flow control (.750gpm) 1. Lime build-up caution - tank and tank compo- nents should be del...
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Page 13 troubleshooting (cont.) problem dripping from sprayhead water flows into tank continuously (on/off switch "on") (unsweet/off/sweet switch in "unsweet" or "sweet" position) water flows into tank continuously (on/off switch "off") (unsweet/off/sweet switch in "off" position. Beverage overflows...
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Page 14 troubleshooting (cont.) problem weak beverage (cont.) dry tea leaves remain in the funnel brewer is making unusual noises probable cause 4. Funnel loading 5. Water temperature 6. Low brew water volume 1. Funnel loading 1. Solenoid(s) 2. Plumbing lines 3. Water supply 4. Tank heater remedy th...
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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 fig. 2 brew solenoid valve p3046 location: viewing the brewer from the top, the brew sole- noid valve is mounted on the right side of the brewer. Test procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white/violet and white/gree...
Page 17
Page 17 service (cont.) digital brew timer fig. 4 digital brew timer p3047 location: the timer is located inside the hood, on the left side. Test procedure. Note: do not remove or install wires while timer board is installed. Pressure applied to one side may cause damage to the board. 1. Disconnect ...
Page 18
Page 18 service (cont.) tl1 - whi to power cord (100v & 120v) or red to power connector (230v) and whi to on/off switch (100v & 120v) or red to on/off switch (230v) tl2 - whi/vio to brew solenoid and whi/vio to on/off switch tl3 - whi/orn to start switch tl4 - whi/grn to brew solenoid tl5 - whi/yel ...
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Page 19 service (cont.) control thermostat fig. 6 control thermostat p3047 location: the control thermostat is located inside hood on the right side. Test procedures: 1. Disconnect the brewer from the power source. 2. Locate the blue/black wire on the control thermo- stat. 3. With a voltmeter, check...
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Page 20 service (cont.) limit thermostat fig. 8 limit thermostat p3047 location: the limit thermostat is located inside the hood on the tank lid. Test procedure: 1. Disconnect the brewer from the power source and remove the black wire from the limit thermostat. 2. With a voltmeter, check the voltage...
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Page 21 service (cont.) on/off switch fig. 10 on/off switch p3034 location: the on/off switch is located in the front of the hood, above and to the left of the brew funnel. Test procedure: 1. Disconnect the brewer from the power source. 2. Remove the black and white/violet wires from the switch term...
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Page 22 if continuity is present as described, reconnect the wires, the switch is operating properly. If continuity is not present as described, replace the switch. Removal and replacement: 1. Remove the wires from the switch terminals. 2. Compress the clips inside the hood and gently push the switc...
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Page 23 fig.15 unsweet/off/sweet switch terminals p1763 37236 050305 service (cont.) unsweet/off/sweet switch (sweetner option) fig. 14 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 24 37236 050305 service (cont.) sweetner solenoid valve fig. 16 sweetner solenoid valve p3298 fig. 17 solenoid valve terminals p2843 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 25 service (cont.) tank heater fig. 18 tank heater location: the tank heater is located inside the tank and se- cured to the tank lid. Test procedures: 1. Disconnect the brewer from the power supply. 2. With a voltmeter, check the voltage across the black and white wires on 100 volt and 120 vol...
Page 26: W/sweetener
Page 26 limit thermostat blu/blk tank heater "keep warm" heater start l1 n blk whi blk brew timer whi whi green whi/yel whi/ora blk whi/grn whi/vio whi brn/whi whi/vio whi whi schematic wiring diagram tb3q w/sweetener 120 volts ac 2 wire single phase thermostat sol 1 2 3 4 5 sol whi/grn whi/vio brew...
Page 27: Schematic Wiring Diagram
Page 27 37236 050305 schematic wiring diagram tb3qa limit thermostat sw1 brew timer blk blk blk blu/blk red red red whi whi whi/vio whi/vio whi/grn whi/grn whi/orn l1 l2 grn/yel whi/yel 37234.0003a 11/04 © 2004 bunn-o-matic corporation 230 volts ac 2 wire single phase sol sw2 "keep warm" heater tank...