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- CWA-APS
- Operating & Service Manual
Bunn CWA-APS Operating & Service Manual
Summary of CWA-APS
Page 1
Operating & service manual bunn-o-matic corporation post office box 3227 springfield, illinois 62708-3227 phone: (217) 529-6601 fax: (217) 529-6644 10690.0001c 6/00 ©1998 bunn-o-matic corporation cwa-aps,ts cwta-aps,ts bunn ®.
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Page 2 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...
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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. Replace any unreadable or damaged labels. # 00656.0000 # 00831.0000 # 00658.0000 10690.1 071598.
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Page 4 electrical requirements caution - the brewer must be disconnected from the power source until specified in initial set-up. "a" models require 2-wire grounded service rated 230-240 volts ac, 20 amp, single phase, 50 hz. Electrical hook-up caution – improper electrical installation will damage ...
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Page 5 models cwtfa-aps & cwtfa-ts 1. Attach the flare fitting from the short piece of tubing on the flow control (supplied) to the lower water inlet fitting at the left rear of the brewer. 2. Attach the flare fitting from the short piece of tubing on the tee (supplied) to the upper water inlet fitt...
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Page 6 10690.1 063000 7. Place the "on/off" switch in the “off” (lower) position after water has stopped flowing from the funnel, and let the water in the tank reheat to the proper temperature. 8. Empty the dispenser and proceed as directed: 8a. Models cwa-ps & cwa-ts: the brewer is now ready for us...
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Page 7 operating controls models cwa-aps & cwa-ts: these models function without operating controls. Models cwta-aps, cwtfa-aps, cwta-ts & cwtfa-ts: on/off switch placing the "on/off" switch in the "off" (lower) position stops brewing. Stopping a brew cycle after it has been started will not stop th...
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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.) brew cycle will not start (cont.) water is not hot inconsistent beverage level in dis- penser probable cause remedy 7. Water strainer/flow control (.222 gpm)(cwta-aps, cwtfa- aps, cwta-ts, cwtfa-ts) 1. Tank heater switch 2. Limit thermostat caution - do not eliminate o...
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Page 10 troubleshooting (cont.) inconsistent beverage level in the dispenser (cont.) consistently low beverage level in the dispenser spitting or excessive steaming dripping from sprayhead 4. Water pressure (cwta-aps, cwtfa-aps,cwta-ts & cwtfa- ts) 1. Timer (cwta-aps, cwtfa- aps, cwta-ts & cwtfa-ts)...
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Page 11 troubleshooting (cont.) water flows into tank continuously (on/off switch "on") water flows into tank continuously (on/off switch "off") beverage overflows dispenser weak beverage 1. Timer (cwta-aps, cwtfa- aps, cwta-ts & cwtfa-ts) 1. Solenoid valve (cwta-aps, cwtfa-aps, cwta-ts & cwtfa- ts)...
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Page 12 troubleshooting (cont.) weak beverage (cont.) dry coffee grounds remain in the funnel brewer is making unusal noises brewer is making unusal noises (cw) 5. Water temperature 1. Funnel loading 1. Solenoid (cwta-aps, cwtfa- aps, cwta-ts & cwtfa-ts) 2. Plumbing lines 3. Water supply 4. Tank hea...
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Page 13 cwta-ts 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 ...
Page 14
Page 14 service (cont.) control thermostat location: the control thermostat is located inside the trunk on the upper left side of the component bracket. Test procedures: 1. Disconnect the brewer from the power source. 2. Locate the blue wire on the control thermostat. 3. With a voltmeter, check the ...
Page 15
Page 15 service (cont.) limit thermostat (cwta & cwtfa) location: the limit thermostat is located inside the rear of the hood on the tank lid. Test procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the blue and black wires from the limit thermostat. 3. With an ohmmeter, check...
Page 16
Page 16 p1131 red to terminal block (red insert) blk to terminal block (black insert) whi/red to timer tl1 on/off switch fig. 6 on/off switch location: the on/off switch is located left of center on the front of the hood. Test procedure: 1. Disconnect the brewer from the power source. 2. Viewing the...
Page 17
Page 17 service (cont.) solenoid valve location: the solenoid valve is located inside the trunk on the lower center part of the component bracket. Test procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white/green wire and black wire from the solenoid valve. With the "on/...
Page 18
Page 18 service (cont.) start switch p1467.40 location: the start switch is located in the front of the hood just to the right of center. Test procedure: 1. Disconnect the brewer from the power supply. 2. Disconnect the white/orange wire from the top switch terminal and the white/yellow wire from th...
Page 19
Page 19 service (cont.) tank heater location: the tank heater is located inside the tank and secured 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 red wires. Connect the brewer to the power source. The in...
Page 20
Page 20 service (cont.) tank heater switch p2195.40 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 (automatics only) or...
Page 21
Page 21 13. Insert new tank heater switch through the hole in the upper left rear of the trunk and secure with switch indicator/guard bracket, hex facenut and plastic facenut. 14. Refer to fig. 15 and reconnect the wires to the tank heater switch terminals. 15. Set tank assembly inside the hood on m...
Page 22
Page 22 fig. 17 timer terminals p1472 tl1 whi/red from on/off switch(1) tl2 red to terminal block (red insert) tl3 whi/orn from start switch tl4 whi/grn from solenoid tl5 whi/yel from start switch timer (early models) fig. 16 timer p1468.40 location: the timer is located inside the front of the trun...
Page 23
Page 23 service (cont.) digital brew timer (late models) p2195.40 fig. 18 digital brew timer location: the timer is located inside the front of the trunk on the top of the component bracket. Test procedure. Note: do not remove or install wires while timer board is installed. Pressure applied to one ...
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Page 24 tl1 whi/red from on/off switch(1) tl2 red to terminal block (red insert) tl3 whi/orn from start switch tl4 whi/grn from solenoid tl5 whi/yel from start switch fig. 19 digital timer wiring p2037 service (cont.) digital brew timer (late models)(cont.) timer setting: note: prior to setting or m...
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Page 25 10690.1 071598.