Instruction/ maintenance manual of the product C Bunn
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OPERA TING & SER VICE MANU AL B UNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 www .
Page 2 WARRANTY Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercially free from defects in material and workmanship existing at the time of manufacture and appearing within one year from the date of installation.
Page 3 USER NOTICES Carefully read and follow all notices in this manual and on the equipment. All labels on the equipment should be kept in good condition.
Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.
Page 5 MODELS W/OUT FAUCET Models CT, CWT, CTF & CWTF 1. Flush the water line and securely attach it to the flare fitting on the strainer or tee. 2. Turn on the water supply. 3. On CTF and CWTF Models, place an empty vessel beneath the faucet and lift the handle until water is dispensed.
Page 6 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. Insert an empty funnel into the funnel rails. 2. Place an empty dispenser under the funnel.
Page 7 the switch is pressed, two seconds are added to the brew time period. Allow the brew cycle to finish in order to verify that the desired volume has been achieved.
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.
Page 9 TROUBLESHOOTING (cont.) PROBLEM Brew cycle will not start (cont.) (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA & CWTFB) Water is not hot PROBABLE CAUSE REMEDY 3. ON/OFF Switch 4. Start Switch 5. Timer 6. Solenoid Valve 7. Water strainer/flow control (.
Page 10 TROUBLESHOOTING (cont.) PROBLEM Inconsistent beverage level in dispenser Consistently low beverage level in the dispenser (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA & CWTFB) Spitting or excessive steaming PROBABLE CAUSE 1. Strainer/flow control (.
Page 11 TROUBLESHOOTING (cont.) PROBLEM Spitting or excessive steaming (cont.) Dripping from sprayhead Water flows into tank continu- ously (ON/OFF Switch "ON") Water flows into tank continu- ously (ON/OFF Switch "OFF") Beverage overflows dispenser PROBABLE CAUSE 2.
Page 12 TROUBLESHOOTING (cont.) PROBLEM Weak beverage Dry coffee grounds remain in the funnel Brewer is making unusal noises (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA & CWTFB) PROBABLE CAUSE 1. Filter Type 2. Coffee Grind 3. Sprayhead 4. Funnel Loading 5.
Page 13 TROUBLESHOOTING (cont.) PROBLEM Brewer is making unusal noises (cont.)(CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA & CWTFB) Brewer is making unusal noises (C) Low beverage serving tempera- ture PROBABLE CAUSE 4. Tank Heater 1. Tank Heater 1. Warmer REMEDY Remove and clean lime off the tank heater.
Page 14 MODEL CWT CA UT ION : W A R M E R S A N D S U R F A C E S A R E H O T C A U T IO N CAUTION DISCARD DECANTER DISCARD DECANTER IF: IF: . C R A C K E D . CRACKED . S C R A T C H E D . SCRATCHED . B O IL E D D R Y . BOILED DRY . H E A T E D W H E N E M P T Y .
Page 15.
Page 16 BLU to BLU Wire from Limit Thermostat BLK to BLK Wire fromTank Heater (Brewers W/Out Faucet) BLK toThermal Cut-Off from Tank Heater (Brewers with Faucet).
Page 17 C A U T IO N CAUTION D IS C A R D D E C A N T E R DISCARD DECANTER IF : IF: ! B U N N ® C SERIES R E A D Y LOWER POUR IN WATER ONLY C A U T IO N CAUTION D IS C A R D D E C A N T E R DISCARD D.
Page 18 Connect wire to Terminal #1 as follows: Lower Warmer ........................................................ WHI/RED One Top Warmer ............................................................. VIO Two Top Warmers (Front) ....................
Page 19.
Page 20 SERVICE (cont.) START SWITCH - CT & CWT Location: The start switch is located in the center front of the hood. Test Procedure: 1. Disconnect the brewer from the power supply. 2. Disconnect the blue wire from the top switch terminal and the white/red from the bottom switch terminal.
Page 21 SERVICE (cont.) TANK HEATER (Cont.) c) 200 to 230 volts ac for two wire 200 or 230 volt models. 3. Disconnect the brewer from the power source. If voltage is present as described, proceed to #4 If voltage is not present as described, refer to the Wiring Diagrams and check wiring harness.
Page 22 SERVICE (cont.) TANK HEATER SWITCH Location: The tank heater switch is located on the rear of the brewer on the upper left side of the trunk. Test Procedure: 1. Disconnect the brewer from the power source. 2. Disconnect the black wire from the limit thermo- stat.
Page 23 SERVICE (cont.) TANK HEATER SWITCH (cont.) switch indicator/guard bracket, hex facenut and plastic facenut. 15. Reconnect the two black wires to the tank heater switch terminals. 16. Set tank assembly inside the hood on mounting brackets and secure with two #8-32 screws.
Page 24 SERVICE (cont.) DIAL TIMER (Early Models) (cont.) with a voltmeter when the "ON/OFF" switch is in the "ON" position (upper) and start switch pressed. Connect the brewer to the power source. The indication must be: a) 120 volts ac for two wire 120 volt models and three wire 120/240 volt models.
Page 25 10841 071000 DIGITAL BREW TIMER (Late Models) P2203.45 DIGITAL BREW TIMER SERVICE (cont.) Location: The timer is located inside the front of the trunk on the upper right side of component bracket. Test Procedure (Digital Timer): NOTE: Do not remove or install wires while timer board is installed.
Page 26 4. Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 21 when reconnecting the wires. 5. Install new circuit board with spacers (as re- quired) to the component mounting bracket.
Page 27 SERVICE (cont.) WARMER ELEMENT(S) Location: The warmer element(s) is located under the warmer plate. Test Procedures: 1. Disconnect the brewer from the power source. 2. Use the white or red wire to the terminal block and the white/red, brown/black or violet wire to the "ON/OFF" switch.
Page 28 P3 BLK P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. BLU BLU/BLK WHI BREW TIMER P1 P2 WHI OPTIONAL AUTOMATIC BREW CIRCUIT SCHEMATIC WIRING DIAGRAM C, CT & CWT 10836.
Page 29 P3 P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. BLU P1 RED OPTIONAL AUTOMATIC BREW CIRCUIT SCHEMATIC WIRING DIAGRAM CWTB 10836.
Page 30 P3 P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. BLU P1 RED OPTIONAL AUTOMATIC BREW CIRCUIT SCHEMATIC WIRING DIAGRAM CWTA 10836.
Page 31 P3 BLK P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. WHI BLK SOL BLU BLU WHI BREW TIMER P1 P2 WHI OPTIONAL AUTOMATIC BREW CIRCUIT SCHEMATIC WIRING DIAGRAM CWTF, CWTFB NO WARMER.
Page 32 10841 042401 READY INDICATOR BLK BLU SW. & THERMOSTAT P3 BLK P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. WHI BLK SOL BLU BLU WHI BREW TIMER P1 P2 WHI OPTIONAL AUTOMATIC B.
An important point after buying a device Bunn C (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 C 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 C - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn C you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn C will certainly help you make a decision on the purchase.
If you already are a holder of Bunn C, 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 C.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn C. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn C 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
