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- TNT-3
- Operating & Service Manual
Bunn TNT-3 Operating & Service Manual
Summary of TNT-3
Page 1
Bunn-o-matic corporation tnt-3 tntf-3 post office box 3227 springfield, illinois 62708-3227 telephone: (217) 529-6601 fax: (217) 529-6644 28201.0000c 8/00 © 1997 bunn-o-matic corporation operating & service manual bunn ®.
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Page 2 contents introduction ............................................................. 2 warranty .................................................................. 2 user notices ............................................................ 3 electrical requirements ................................
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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 protection. All notices on the equipment should be kept in good condition. Replace any unreadable or damaged labels. 28201 081598.
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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 volt ac, 15 amp, single phase, 60 hz. 120/208v model brewers require 3-wire, grounded service rated 120/ 208...
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Page 5 1. Remove the shipping cap(s) from the bulkhead fitting(s) on the rear of the brewer. 2. Attach the flare fitting from the short piece of tubing on the strainer/flow control (supplied) to the water inlet fitting(s) at the rear of the brewer. 3. Flush the water line and securely attach it to t...
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Page 6 13. Empty the dispenser. 14. Plug in the brewer and wait for the water in the tank to heat to brewing temperature (approximately 20 minutes). Some water will drip from the funnel during this time; this is due to expansion and should not occur thereafter. 15. Place the iced/off/hot switch in t...
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Page 7 cleaning caution – do not keep brewed tea overnight. Clean and sanitize your iced tea dispenser daily 1. Remove and thoroughly clean the brew funnel. The funnel tip and screen must be free from any tea particles or residue. Reassemble the funnel. 2. Unplug the brewer. Remove and thoroughly ri...
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Page 8 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 9 troubleshooting (cont.) problem probable cause remedy brew cycle(s) will not start (cont.) brew water is not hot dilution (iced tea) cycle will not start 6. Brew timer a) iced tea b) hot tea 7. Brew solenoid valve a) iced tea b) hot tea 8. Internal flow control (.222 gpm) (hot tea only) 1. Li...
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Page 10 troubleshooting (cont.) problem probable cause remedy dilution (iced tea) cycle will not start (cont.) inconsistent beverage level in dispenser (hot tea) consistently high or low beverage level in the dispenser 2. Start switch 3. Brew timer (iced tea) 4. Brew solenoid valve (iced tea) 5. Dil...
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Page 11 troubleshooting (cont.) problem consistently high or low beverage level in the dispenser. (cont.) spitting or excessive steaming drip-out time too long dripping from sprayhead probable cause 2. External strainer/flow control (.750 gpm) 1. Lime build-up caution - tank and tank compo- nents sh...
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Page 12 troubleshooting (cont.) problem water flows into tank continuously (iced/off/hot switch in the "iced or "hot" position) water flows into tank continuously (iced/off/hot switch in the "off" position) beverage overflows dispenser probable cause 1. Brew timer a) iced tea b) hot tea 1. Brew sole...
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Page 13 remedy bunn ® paper filters must be used for proper extraction. A sufficient quantity of fresh, loose tea leaves should be used for proper extraction. A six-hole stainless steel spray- head must be used for proper ex- traction. The bunn ® paper filter must be cen- tered in the funnel and the...
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Page 14 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 15 location: viewing the brewer from the rear, the hot tea brew solenoid valve is mounted on the left side of the mounting bracket. Test procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white/red and white/green wires from the hot tea solenoid valve. With the iced/ ...
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Page 16 p1391.60 fig. 4 iced tea brew solenoid valve location: viewing the brewer from the rear, the iced tea brew solenoid valve is mounted in the center of the mount- ing bracket. Test procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white/violet and white/blue wires f...
Page 17
Page 17 location: the hot tea brew timer is located in the hood on the left side. It consists of a dial plate and circuit board. Test procedure: 1. Disconnect the brewer from the power source. 2. Remove the wires from terminals tl3, tl4, & tl5 of the timer and rotate the dial fully counterclock- wis...
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Page 18 service (cont.) 28201 081500 brew timer (hot tea - late models) location: the hot tea brew timer is located in 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. Disco...
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Page 19 service (cont.) 28201 081500 brew timer (hot tea - late models)(cont.) 1. Modifying brew volumes. To modify a brew vol- ume, first check that the set/lock switch is in the “set” position on the circuit board. To increase a brew volume, place the on/off switch in the “on” position, press and ...
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Page 20 location: the iced tea brew timer is located in the hood on the right side. It consists of the dial plate and circuit board. Test procedure: 1. Disconnect the brewer from the power source. 2. Remove the wires from terminals tl3, tl4, & tl5 of the iced tea timer and rotate the dial fully coun...
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Page 21 service (cont.) brew timer (iced tea - late models) location: the timer is located in the hood on the right 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 the brewer from the...
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Page 22 1. Modifying brew volumes. To modify a brew vol- ume, first check that the set/lock switch is in the “set” position on the circuit board. 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 ...
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Page 23 bu nn bunn off off hi hi location: the control thermostat is located inside hood on the right side just behind the iced tea brew timer. Test procedures: 1. Disconnect the brewer from the power source. 2. With a voltmeter, check the voltage across the blue wire on the control thermostat and t...
Page 24
Page 24 service (cont.) dilution solenoid valve fig. 16 dilution solenoid valve p1391.60 location: viewing the brewer from the rear the dilution so- lenoid is mounted on the right side of the solenoid mounting bracket which is secured to the trunk base. Test procedure: 1. Disconnect the brewer from ...
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Page 25 service (cont.) limit thermostat fig. 18 limit thermostat p2213.60 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 vol...
Page 26
Page 26 fig.21 iced/off/hot switch terminals p1367 service (cont.) iced/off/hot switch fig. 20 iced/off/hot switch p1370.40 location: the iced/off/hot 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....
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Page 27 service (cont.) start switch fig. 22 start switch p1370.40 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 cont...
Page 28
Page 28 fig. 24 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 120 volt models or the black and red wires for 1...
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Page 29 service (cont.) thermal fuse (models w/faucet only) fig. 26 thermal fuse p2213.60 location: the thermal fuse is located inside the hood con- nected to the right tank heater terminal. Test procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the thermal fuse from the righ...
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Page 30 28201 081598.