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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. In addition: 1.) Bunn warrants electronic circuit and/or control boards to be commercially free from defects in material and workmanship for three years from the date of installation. 2.) Bunn warrants the compressor on refrigeration equipment to be commercia
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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. “A" & "B” models require 2- Model 20 requires 2-wire, Model 35 requires 3-wire, wire, grounded service rated 200 grounded service rated 120 volts grounded service rated 120/208 or volts ac or 230 volts ac, 20 amp, ac, 20 amp, single phase, 60 Hz. 120/240 vol
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PLUMBING REQUIREMENTS (cont.) MODELS W/OUT FAUCET MODELS W/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. 10841 071000 Page 5
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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. 3. Place the heater switch at the rear of the brewer in the “OFF” lower position and connect the brewer to the power source. 4. Fill the tank with water as directed: 4A. Model C Pour three pitchers of tap water into the screened area on top of the brew
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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. To decrease a batch size. Press and release the START or BREW switch once for every two-second interval to be removed from the total brew time period; then immediately press and hold down the START or BREW switch until three clicks are heard. Release the switch. (Failure to release the switch within two seconds after the third click ca
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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 electrical equipment should be performed only by qualified service personnel. • All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the appl
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Refer to Service - ON/OFF Switch 3. ON/OFF Switch Brew cycle will not start (cont.) for testing. See page 17 (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA & CWTFB) Refer to Service - Start Switch for 4. Start Switch testing procedures. See page 20 Refer to Service - Timer for testing 5. Timer procedures. See page 23 Refer to Service - Solenoid Valve 6. Solenoid Valve for testing procedures. See page 19 (A) Direction of flow arrow must 7. Water stra
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Inconsistent beverage level in 1. Strainer/flow control (.222 (A) Direction of flow arrow must dispenser GPM) (CT,CTF, CWT, CWTA, be pointing towards the brewer. CWTB, CWTF, CWTFA & CWTFB) (B) Remove the strainer/flow control and check for obstruc- tion. Clear or replace. 2. Syphon System The brewer must be level or slightly lower in front to syphon properly. 3. Lime Build-up Inspect the tank assembly for CAUTION - Tank and tank excessive lim
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming 2. Control Thermostat Refer to Service - Control (cont.) Thermostat for testing proce- dures. See page 15 Dripping from sprayhead 1. Syphon System The brewer must be level or slightly lower in front to syphon properly. 2. Lime Build-up Inspect the tank assembly for CAUTION - Tank and tank com- excessive lime deposits. Delime ponents should be delimed as required. regularly depending on local water conditions. Ex
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Weak beverage 1. Filter Type BUNN® paper filters must be used for proper extraction. 2. Coffee Grind A fine or drip grind must be used for proper extraction. 3. Sprayhead A six-hole stainless steel spray- head must be used for proper extraction. 4. Funnel Loading The BUNN® paper filter must be centered in the funnel and the bed of ground leveled by gentle shak- ing. 5. Water Temperature Place an empty funnel on an empty dispenser beneath the
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TROUBLESHOOTING (cont.) REMEDY PROBLEM PROBABLE CAUSE Remove and clean lime off the Brewer is making unusal noises 4. Tank Heater tank heater. See page 20 (cont.)(CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA & CWTFB) Remove and clean lime off the Brewer is making unusal noises 1. Tank Heater tank heater. See page 20 (C) Refer to Service - Warmer Low beverage serving tempera- 1. Warmer element for testing procedures. ture See page 27 10841 071000 Page 13
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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 equipment should be performed only by qualified service personnel. The brewer should be unplugged when servicing, except when electrical tests are re- quired and the test procedure specifically states to plug-in th
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SERVICE (cont.) ON/OFF SWITCH - MODEL CWT ON/OFF SWITCH - MODEL C ONE LOWER WARMER ONE LOWER WARMER ONE LOWER & ONE UPPER WARMER ONE LOWER & ONE UPPER WARMER THREE LOWER WARMERS OR ONE LOWER & TWO UPPER WARMERS THREE LOWER WARMERS ( LEFT OR RIGHT) OR ONE LOWER AND TWO UPPER WARMERS ONE UPPER & THREE LOWER WARMERS ONE UPPER & THREE LOWER WARMERS (LEFT OR RIGHT) P1156 P1155 Location: The ON/OFF switch(s) are located on the front of the hood. 10841 091596 Page 17 CW SERIES BUNN READY ON/LOWER STAR
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SERVICE (cont.) WHI to Terminal Block (White ON/OFF SWITCH (cont.) Insert on 120V or 120/240V Models) Test Procedure: RED to Terminal Block (Red 1. Disconnect the brewer from the power source. Insert on 200V or 230V Models) 2. Viewing the switch from the back remove the white or red wire from the upper terminal and the BLK to Terminal Block (Black black wire from the center terminal. Insert) 3. Check the voltage across the white wire or red wire and the black wire with a voltmeter. Connect Term
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