Bunn CW-APS Operating & Service Manual
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Bunn CW-APS Operating & Service Manual

Bunn cw-aps: service manual
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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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  • Page 1 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...
  • Page 2 SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, REPLACEMENT OR REFUND. In no event shall Bunn be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.
  • Page 3 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 USER NOTICES Page 3 10690 021800...

  • Page 4: Electrical Requirements

    " water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.
  • Page 5 PLUMBING REQUIREMENTS (cont.) 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. FIRST TYPE MODELS W/FAUCET SECOND TYPE MODELS W/FAUCET THIRD TYPE MODELS W/FAUCET Models CWTF-APS, CWTF-TS CWTF-TSR: 1.

  • Page 6: Initial Set-Up

    Fill the tank with water as directed: 4A.Models CW-APS & CW-TS: Pour three pitchers of tap water into the screened area on top of the brewer. Allow approximately two minutes between pitchers for water to flow into the tank. While the third pitcher of water is entering the tank, the tank will fill to capacity and the excess will flow from the sprayhead, out of the funnel, and into the dispenser.

  • Page 7: Adjusting Brew Volumes

    SET/LOCK switch to the “LOCK” position. This will prevent any program- ming to be done until switch is once again placed in the “SET” position. Models CW-APS & CW-TS: These models function without operating controls.

  • Page 8: Coffee Brewing

    Slide the funnel into the funnel rails. Place an empty dispenser beneath the funnel. 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"...
  • Page 9 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.
  • Page 10 TROUBLESHOOTING (cont.) PROBLEM Brew cycle will not start (cont.) (CWT-APS, CWTF-APS, CWT-TS, CWTF-TS, CWT-TSR &CWTF- TSR) Water is not hot PROBABLE CAUSE 3. ON/OFF Switch 4. Start Switch 5. Timer 6. Solenoid Valve 7. Water strainer/flow control (.222 GPM) 1. Tank Heater Switch 2.
  • Page 11 TROUBLESHOOTING (cont.) PROBLEM Inconsistent beverage level in dis- penser Consistently low beverage level in the dispenser (CWT-APS, CWTF- APS, CWT-TS, CWTF-TS, CWT- TSR & CWTF-TSR) Spitting or excessive steaming PROBABLE CAUSE 1. Strainer /flow control (.222 GPM) (CWT-APS, CWTF-APS, CWT-TS, CWTF-TS, CWT-TSR & CWTF-TSR 2.
  • Page 12 TROUBLESHOOTING (cont.) PROBLEM Spitting or excessive steaming (cont.) Dripping from sprayhead Water flows into tank continuously (ON/OFF Switch "ON") Water flows into tank continuously (ON/OFF Switch "OFF") Beverage overflows dispenser PROBABLE CAUSE 2. Control Thermostat 1. Syphon System 2. Lime Build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water condi-...
  • Page 13 A six-hole stainless steel spray- head must be used for proper extraction. The BUNN® paper filter must be centered in the funnel and the bed of ground leveled by gentle shak- ing. Place an empty funnel on an empty dispenser beneath the sprayhead.
  • Page 14 TROUBLESHOOTING (cont.) PROBLEM Brewer is making unusal noises (cont.)(CWT-APS, CWTF-APS, CWT-TS, CWTF-TS, CWT-TSR, CWTF-TSR) Brewer is making unusal noises (CW) PROBABLE CAUSE 4. Tank Heater 1. Tank Heater Page 14 REMEDY Remove and clean lime off the tank heater. See page 21 Remove and clean lime off the tank heater.

  • Page 15: Table Of Contents

    Start Switch (Brew) ... 20 Tank Heater ... 21 Tank Heater Switch ... 23 Timer (Early Models) ... 25 Digital Timer (Late Models) ... 27 Wiring Diagrams ... 29 thru 33 FIG. 1 COMPONENT ACESS Page 15 CW-APS CWT-TS CWT-TSR P1126.30 10690 062300...

  • Page 16: Control Thermostat

    SERVICE (cont.) CONTROL THERMOSTAT EARLY MODELS LATE MODELS FIG. 2 CONTROL THERMOSTAT Location: Early Models: The control thermostat is mounted on a bracket inside the hood on the right side just in front of the tank lid. Late Models: The control thermostat is located inside the trunk on the left side of the component bracket.

  • Page 17: 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.

  • Page 18: On/Off Switch

    SERVICE (cont.) ON/OFF SWITCH FIG. 6 ON/OFF SWITCH Location: The ON/OFF switch is located on the left front of the hood. Test Procedure: 1. Disconnect the brewer from the power source. 2. Viewing the switch from the back remove the white wire from the upper terminal and the black wire from the center terminal.

  • Page 19: Solenoid (Inlet)

    SERVICE (cont.) SOLENOID VALVE FIG. 8 SOLENOID VALVE Location: The solenoid valve is located inside the trunk on the center lower part of the component bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white and black wires from the solenoid valve.

  • Page 20: Start Switch (Brew)

    SERVICE (cont.) START SWITCH FIG 10 START SWITCH 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 blue wire from the top switch terminal and the white/red wire from the bottom switch terminal.

  • Page 21: Tank Heater

    SERVICE (cont.) TANK HEATER FIG. 12 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 white wires on 100 or 120 volt models or the black and red wires for 120/240 volt mod- els, 200 volt models and 240 volt models .
  • Page 22 SERVICE (cont.) TANK HEATER (Cont.) 10. Install new tank heater with gaskets on the tank lid and secure with two hex nuts. 11. Install tank lid with limit thermostat, sprayhead tube, tank heater, coil assembly (brewers with faucet) and control thermostat with bracket (early brewers only) using eight #8-32 hex nut.

  • Page 23: Tank Heater Switch

    SERVICE (cont.) TANK HEATER SWITCH FIG. 14 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.
  • Page 24 SERVICE (cont.) TANK HEATER SWITCH (cont.) 13. Remove the plastic facenut, hex facenut and the switch indicator/guard bracket that secures tank heater switch to the rear of the brewer. Remove switch and discard. 14. 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.

  • Page 25: Timer(Early Models)

    SERVICE (cont.) TIMER(Early Models) FIG. 16 TIMER Location: The timer is located inside the front of the trunk on the top of component bracket. Test Procedure. 1. Disconnect the brewer from the power source. 2. Disconnect the polarized, three pin connector from the brewer wiring harness and rotate the brew timer dial fully counterclockwise.
  • Page 26 SERVICE (cont.) TIMER (cont.) If voltage is present as described, the brew timer is operating properly. Reset the timer dial as required, to obtain the desired brew volume. If voltage is not present as described, replace the timer. Removal and Replacement: 1.

  • Page 27: Digital Timer (Late Models)

    DIGITAL BREW TIMER (Late Models) 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.
  • Page 28 SERVICE (cont.) DIGITAL BREW TIMER (Late Models)(cont.) Timer Setting: NOTE: Prior to setting or modifying volumes, check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place. NOTE: All volume settings must be done with the sprayhead installed.
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  • Page 33: Wiring Diagrams

    10690 081100 Page 33...

This manual is also suitable for:

Cwt-tsCwt-tsr

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