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Bunn TNT-3 - page 1
BUNN-O-MA TIC CORPORA TION 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 OPERA TING & SER VICE MANU AL BU N N ® ...
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Bunn TNT-3 - page 2
Page 2 CONTENTS Introduction ............................................................. 2 Warranty .................................................................. 2 User Notices ............................................................ 3 Electrical Requirements ........................................... 4 Plumbing Requirements ........... ...
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Bunn TNT-3 - page 3
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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Bunn TNT-3 - page 4
Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power sour ce until specified in Initial Set-Up. 120V model brewers require 2-wire, grounded ser vice rated 120 volt ac, 15 amp, single phase, 60 Hz. 120/208V model brewers require 3-wire, grounded service rated 120/ 208 volt, 20 amp, single phase, 60 Hz. Electrical H ...
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Bunn TNT-3 - page 5
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 the flare fitting on the tee or strainer/flow con ...
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Bunn TNT-3 - page 6
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 the “ HOT ” position and begin another brew c ...
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Bunn TNT-3 - page 7
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 rinse the sprayhead. The holes must be open and c ...
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Bunn TNT-3 - page 8
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 T echnical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only b ...
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Bunn TNT-3 - page 9
Page 9 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle(s) will not start (cont.) Brew water is not hot Dilution (Iced T ea) cycle will not start 6. Brew T imer A) Iced T ea B) Hot T ea 7. Brew Solenoid Valve A) Iced T ea B) Hot T ea 8. Internal Flow control (.222 GPM) (Hot T ea Only) 1. Limit Thermostat CAUTION - Do not eliminate o ...
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Bunn TNT-3 - page 10
Page 10 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Dilution (Iced T ea) cycle will not start (cont.) Inconsistent beverage level in dispenser (Hot T ea) Consistently high or low beverage level in the dispenser 2. Start Switch 3. Brew T imer (Iced T ea) 4. Brew Solenoid V alve (Iced T ea) 5. Dilution Solenoid Valve 1. Internal Flow Contro ...
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Bunn TNT-3 - page 11
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 - T ank and tank compo- nents should be delimed regularly depending on local wat ...
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Bunn TNT-3 - page 12
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 T imer A) Iced T ea B) Hot T ea 1. Brew Solenoid Valve A) Iced T e ...
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Bunn TNT-3 - page 13
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 bed of tea leaves leveled by gentle shaking. Pl ...
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Bunn TNT-3 - page 14
Page 14 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessar y . Refer to T roubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and r epair of electri- cal equipment should be per formed only by qualified ser v ...
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Bunn TNT-3 - page 15
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/ OFF/HOT switch in the "HOT" position pre ...
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Bunn TNT-3 - page 16
Page 16 P1391.60 FIG. 4 ICED TEA BREW SOLENOID V AL VE 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 sour ce. 2. Disconnect the white/violet and white/blue wires from the iced tea brew solenoid valve. With the ...
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Bunn TNT-3 - 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. T est Pr ocedure: 1. Disconnect the brewer from the power sour ce. 2. Remove the wires from terminals TL3, TL4, & TL5 of the timer and rotate the dial fully counter clock- wise. 2. With a voltmeter , check the voltage ...
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Bunn TNT-3 - page 18
Page 18 SERVICE (cont.) 28201 081500 BREW TIMER (HOT TEA - LA TE 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. Disconnect the brewer from the power source and remove ...
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Bunn TNT-3 - page 19
Page 19 SERVICE (cont.) 28201 081500 BREW TIMER (HOT TEA - LA TE MODELS)(cont.) 1. Modifying brew volumes. T o modify a brew vol- ume, first check that the SET/LOCK switch is in the “ SET ” position on the cir cuit board. T o increase a brew volume, place the ON/OFF switch in the “ ON ” position, press and hold the ST ART switch until three ...
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Bunn TNT-3 - page 20
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. T est Pr ocedure: 1. Disconnect the brewer from the power sour ce. 2. Remove the wires from terminals TL3, TL4, & TL5 of the iced tea timer and rotate the dial fully coun- ter clockwise. 2. With a voltmeter , chec ...
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Bunn TNT-3 - page 21
Page 21 SERVICE (cont.) BREW TIMER (ICED TEA - LA TE 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 power source and remove the front access panel. ...
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Bunn TNT-3 - page 22
Page 22 1. Modifying brew volumes. T o modify a brew vol- ume, first check that the SET/LOCK switch is in the “ SET ” position on the cir cuit board. T o increase a brew volume, place the ON/OFF switch in the “ ON ” position, press and hold the ST ART switch until three clicks are heard. Release the switch and press it again one or more tim ...
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Bunn TNT-3 - page 23
Page 23 B U N N BUNN OFF OFF H I 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 sour ce. 2. With a voltmeter , check the voltage across the blue wire on the control thermostat and the white wire on the tank heater for 120 volt ...
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Bunn TNT-3 - page 24
Page 24 SERVICE (cont.) DILUTION SOLENOID V AL VE FIG. 16 DILUTION SOLENOID V AL VE 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. T est Pr ocedure: 1. Disconnect the brewer from the power sour ce. 2. With a voltmeter , che ...
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Bunn TNT-3 - page 25
Page 25 SERVICE (cont.) LIMIT THERMOST A T FIG. 18 LIMIT THERMOST A T P2213.60 Location: The limit thermostat is located inside the hood on the tank lid. T est Pr ocedure: 1. Disconnect the brewer from the power sour ce and remove the black wire from the limit thermostat. 2. With a voltmeter , check the voltage across the black wire removed from th ...
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Bunn TNT-3 - 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. T est Pr ocedure: 1. Disconnect the brewer from the power sour ce. 2. Remove the black and white/violet wires fro ...
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Bunn TNT-3 - page 27
Page 27 SERVICE (cont.) ST ART SWITCH FIG. 22 ST ART SWITCH P1370.40 Location: The start switch is located in the front of the hood, above and to the right of the brew funnel. T est Pr ocedure: 1. Disconnect the brewer from the power sour ce. 2. Remove the wires from all four terminals. 3. Check for continuity across the two terminals on the right ...
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Bunn TNT-3 - page 28
Page 28 FIG. 24 T ANK HEA TER Location: The tank heater is located inside the tank and se- cured to the tank lid. T est Pr ocedures: 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 120/208 volt models with a voltmeter . Connec ...
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Bunn TNT-3 - page 29
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. T est Pr ocedures: 1. Disconnect the brewer from the power sour ce. 2. Disconnect the thermal fuse from the right tank heater terminal and the black lead from ...
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Bunn TNT-3 - page 30
Page 30 28201 081598 ...
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