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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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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 electronic components. 1. An electrician must provide electrical service as specified. 2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source. 3. Place the heate
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PLUMBING REQUIREMENTS (cont.) 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 fitting at the left rear side of the brewer. 3. Flush the water line and securely attach it to the flare fitting on the tee. 4. Turn on the water supply. 5. Place an empty vessel b
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INITIAL SET-UP (cont.) 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 use in accordance with the coffee brewing instructions on the next page. 8B. Models CWTA-APS, CWTFA-APS, CWTA-TS & CWTFA-TS: Place the "ON/OFF" switch in the "ON" (upper) position, and momentarily
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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 the flow of water into the funnel until the tank syphons down to its proper level. Placing the switch in the "ON" (upper) position enables the brew circuit. START SWITCH Momentarily pressing and releasing
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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 240 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 (A) Direction of flow arrow must Brew cycle will not start (cont.) 7. Water strainer/flow control be pointing towards brewer. (.222 GPM)(CWTA-APS, CWTFA- APS, CWTA-TS, CWTFA-TS) (B) Remove the strainer/flow con- trol and check for obstructions. Clear or replace. Refer to Service - Tank Heater Water is not hot 1. Tank Heater Switch Switch for testing procedures. See page 20 Refer to Service - Limit Thermo- 2. Limit Thermostat stat for testing
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Inconsistent beverage level in the 4. Water Pressure (CWTA-APS, The water pressure to the brewer dispenser (cont.) CWTFA-APS,CWTA-TS & CWTFA- must be at least 20 psi (138 kPa). TS) 1. Timer (CWTA-APS, CWTFA- Consistently low beverage level in Timer dial must activate solenoid the dispenser APS, CWTA-TS & CWTFA-TS) for at least two minutes and fifteen seconds. 2. Strainer/flow Control (.222 (A) Direction of flow arrow must GPM) be pointing tow
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TROUBLESHOOTING (cont.) REMEDY PROBABLE CAUSE PROBLEM Water flows into tank continuously 1. Timer (CWTA-APS, CWTFA- Refer to Service - Timer for testing (ON/OFF Switch "ON") APS, CWTA-TS & CWTFA-TS) procedures. See page 22 or 23 Water flows into tank continuously 1. Solenoid Valve (CWTA-APS, Remove the Solenoid Valve and (ON/OFF Switch "OFF") CWTFA-APS, CWTA-TS & CWTFA- clean any obstruction. Rebuild or TS) replace the valve if necessary. See page 17 Beverage overflows dispenser 1. Dispenser The
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Weak beverage (cont.) 5. Water Temperature Place an empty funnel on an empty dispenser beneath the sprayhead. Initiate a brew cycle and check the water temperature immediately below the sprayhead with a ther- mometer. The reading should not be less than 195°F (91°C). Adjust the control thermostat to increase the water temperature. Replace if necessary. Dry coffee grounds remain in the 1. Funnel Loading The BUNN® paper filter must be funnel ce
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SERVICE (cont.) LIMIT THERMOSTAT (CWTA & CWTFA) Removal and Replacement: 1. Remove all wires from limit thermostat terminals. 2. Carefully slide the limit thermostat out from under the retaining clip and remove limit thermostat. 3. Carefully slide the new limit thermostat into the retaining clip. 4. Refer to Fig. 5 when reconnecting the wires. P2195.40 FIG. 4 LIMIT THERMOSTAT Location: BLU to BLU Lead The limit thermostat is located inside the rear of from the hood on the tank lid. Control Therm
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SERVICE (cont.) 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 valve, there may be a blockage in the water line before the solenoid valve,
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SERVICE (cont.) START SWITCH If continuity is present as described, reconnect the white/orange wire to the top terminal and the white/ yellow wire to the bottom terminal. If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove the white/orange wire and white/yellow 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 swi
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SERVICE (cont.) If continuity is present as described, the tank heater TANK HEATER SWITCH switch is operating properly. If continuity is not present as described, replace the tank heater switch. 6. Disconnect the red wire from the thermal fuse on the tank heater. 7. Check for continuity between the red wire re- moved from the thermal fuse and the red insert on the teminal block, with the tank heater switch in the "ON" (upper) position. Continuity should not be present in the "OFF" (lower) positi
