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®
BUNN
CW-APS,
CWT-TS &
CWT-TSR
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10690.0000F 8/00 ©1993 Bunn-O-Matic Corporation
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INTRODUCTION This equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily configured for either pour-over or automatic brewing. The automatic version may include a hot water faucet for allied beverage use. It is only for indoor use on a sturdy counter or shelf. 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 wi
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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. Replace any unreadable or damaged labels. #00831.0000 #00656.0000 #00658.0000 10690 021800 Page 3
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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. L2 RED WHITE WHITE 120V A.C. WHITE NEUTRAL 208 OR 240V A.C. NEUTRAL 120V A.C. 100V A.C. L1 BLACK NEUTRAL L1 BLACK 120V A.C. L1 BLACK Model 20 requires 2- Model 35 requires 3- “A" & "B” models re- "B” models require 2- wire, grounded service wire, grounded se
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PLUMBING REQUIREMENTS (cont.) SECOND TYPE MODELS W/FAUCET EARLY MODELS W/OUT FAUCET 1. Flush the water line and securely attach it to the flare fitting on the strainer. 2. Turn on the water supply. THIRD TYPE MODELS W/FAUCET Models CWTF-APS, CWTF-TS CWTF-TSR: 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. Place an empty vessel beneath the faucet and lift the handle until water is dispensed. FIRST TYPE MODELS W/FAUCET 10
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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.Models CW-APS & CW-TS: Pour three pitchers of tap water into the screened area on
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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, and a funnel and server are in place. 1. Modifying batch sizes. To modify a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. To increase a batch size. Press
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COFFEE BREWING ® 1. Insert a BUNN filter into the funnel. 2. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking. 3. Slide the funnel into the funnel rails. 4. Place an empty dispenser beneath the funnel. 5. Operate the brewer as directed: 5A.Models CW-APS & CW-TS: Pour one pitcher of tap water into the screened area on top of the brewer. 5B.Models CWT-APS, CWTF-APS, CWT-TS, CWTF-TS, CWT-TSR & CWTF-TSR Place the "ON/OFF" switch in the "ON" (upper) position.
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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 Brew cycle will not start (cont.) 3. ON/OFF Switch Refer to Service - ON/OFF Switch for testing. See page 18 (CWT-APS, CWTF-APS, CWT-TS, CWTF-TS, CWT-TSR &CWTF- TSR) 4. Start Switch Refer to Service - Start Switch for testing procedures. See page 20 5. Timer Refer to Service - Timer for testing procedures. See page 25 or 27 Refer to Service - Solenoid Valve 6. Solenoid Valve for testing procedures. See page 19 7. Water strainer/flow control
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Inconsistent beverage level in dis- 1. Strainer /flow control (.222 (A) Direction of flow arrow must penser GPM) (CWT-APS, CWTF-APS, be pointing towards the brewer. CWT-TS, CWTF-TS, CWT-TSR & CWTF-TSR (B) Remove the strainer/flow con- trol and check for obstruction. 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 ex- CAUTION - Tank and ta
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TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY PROBLEM Spitting or excessive steaming 2. Control Thermostat Refer to Service - Control Ther- (cont.) mostat for testing procedures. See page 16 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 ex- CAUTION - Tank and tank compo- cessive lime deposits. Delime as nents should be delimed regularly required. depending on local water condi- tions
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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 21 (cont.)(CWT-APS, CWTF-APS, CWT-TS, CWTF-TS, CWT-TSR, CWTF-TSR) Remove and clean lime off the Brewer is making unusal noises 1. Tank Heater tank heater. See page 21 (CW) 10690 062300 Page 14
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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.) Test Procedures: CONTROL THERMOSTAT 1. Disconnect the brewer from the power source. 2. Locate the blue wire on the control thermostat. 3. With a voltmeter, check the voltage across the blue wire on the control thermostat and the white in- sert on two pole 100 or 120 volt terminal block or three pole 120/240 volt terminal blocks and the red insert on two wire 200 volt or 240 volt terminal block. Connect the brewer to the power source. The indication must be: a) 120 volts ac for
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LIMIT THERMOSTAT SERVICE (cont.) CONTROL THERMOSTAT (cont.) Removal and Replacement: 1. Remove wires from control thermostat leads. 2. Remove the thermostat capillary bulb by firmly pulling up on the capillary at the tank lid. This will disengage the grommet from the tank lid. 3. Early Models: Remove the two #8-32 screws se- curing control thermostat bracket mounted inside the hood. Late Models: Remove the one #8-32 screw secur- P1127.40 ing the control thermostat to the component bracket FIG. 4
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SERVICE (cont.) ON/OFF SWITCH If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring har- ness. 5. With the black wire removed, remove the white/ red wire from the lower terminal. 6. Check for continuity across the center and lower terminal with the switch in the "ON" (upper) posi- tion. Continuity must not be present when the switch is in the "OFF" (lower) position. If continuity is present as described, reconnect the black wire to the center terminal a
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SERVICE (cont.) If continuity is not present as described, replace the SOLENOID VALVE solenoid valve. 6. Check the solenoid valve for coil action. Connect the brewer to the power source. With "ON/OFF" switch in the "ON" (upper) position press start switch and listen carefully in the vicinity of the solenoid valve for a" clicking" sound as the coil magnet attracts. 7. Disconnect the brewer from the power source. If the sound is heard as described and water will not pass through the solenoid valv
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SERVICE (cont.) START SWITCH If continuity is present as described, reconnect the blue wire to the top terminal and the white/red wire to the bottom terminal. If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove the blue wire and white/red wire from the start switch. 2. Compress the clips inside the hood and gently push the switch through the opening. 3. Push new switch into the opening and spread the clips to hold the start switch in the hood. P0150.
