Bunn CWT Service Manual

CAUTION :CAUTION!C, CT, CTF,CWT, CWTF,SINGLE CW,SINGLE CWFOPERATING & SERVICE MANUALBUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLIN

Page 10TROUBLESHOOTING (cont.)PROBLEMInconsistent beverage level in dispenserConsistently low beverage level in the dispenser (CT, CTF, CWT, CWTA, CWT

Page 11TROUBLESHOOTING (cont.)PROBLEMSpitting or excessive steaming (cont.)Dripping from sprayheadWater flows into tank continu-ously (ON/OFF Switch &q

Page 12TROUBLESHOOTING (cont.)PROBLEMWeak beverageDry coffee grounds remain in the funnelBrewer is making unusal noises (CT, CTF, CWT, CWTA, CWTB, CWT

Page 13TROUBLESHOOTING (cont.)PROBLEMBrewer is making unusal noises (cont.)(CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CWF)

Page 14CA UTI ON :WARMERS AND SURFACES ARE HOTCAUTION!BUNNPOUR IN WATER ONLYCAUTION :WARMERS A ND SURFACES ARE HOTCAUTION!BUNNCAUTION :WARMERS A ND

Page 15SERVICE (cont.)CONTROL THERMOSTAT MODEL CWTMODEL SINGLE CWLocation: The control thermostat is located inside the trunk on the left side of th

Page 16SERVICE (cont.)CONTROL THERMOSTAT (cont.)4. Slide the grommet to the line 4.5" above the bulb on the new capillary tube.5. Insert the c

Page 17BUNNCW SERIESREADY ON/LOWERSTARTBUNNCW SERIESREADY ON/LOWER STARTBUNNCW SERIESREADY ON/LOWER STARTBUNNCW SERIESREADY ON/LOWER STARTBUNNCW SERIE

Page 18Connect wire to Terminal #1 as follows:Lower Warmer ... WHI/REDOne Top Warmer ...

Page 19SERVICE (cont.)SOLENOID VALVE - CT, CWT & SINGLE CWLocation: The solenoid valve is located inside the trunk on the lower center part of th

Page 210841 073108BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTYBunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:1) All equipmen

Page 20SERVICE (cont.)START SWITCH - CT, CWT & SINGLE CWLocation: The start switch is located in the center front of the hood.Test Procedure:1.

Page 21SERVICE (cont.)TANK HEATERLocation: The tank heater is located inside the tank and secured to the tank lid.Test Procedures:1. Disconnect the

Page 22SERVICE (cont.)TANK HEATER (Cont.)TANK HEATER SWITCHLocation: The tank heater switch is located on the rear of the brewer on the upper left si

Page 23SERVICE (cont.)TANK HEATER SWITCH (cont.)14. Insert new tank heater switch through the hole in the upper left rear of the trunk and secure wit

Page 24SERVICE (cont.) with a voltmeter when the "ON/OFF" switch is in the "ON" position (upper) and start switch pressed. Conne

Page 25P113610841 020503Dial TimerDIGITAL BREW TIMER (Late Models) FIG. 21 DIGITAL BREW TIMERSERVICE (cont.)DIAL TIMER (Early Models) (cont.)Location

Page 264. Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 22 when reconnectin

Page 27SERVICE (cont.)WARMER ELEMENT(S)Location: The warmer element(s) is located under the warmer plate.Test Procedures:1. Disconnect the brewer f

Page 28P3BLKP1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR.BLUBLU/BLKWHIBREWTIMERP1P2WHIOPTIONAL AUTOMATIC BREW CIRCUITSCHEMATIC WIRING

Page 29P3P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR.BLUP1REDOPTIONAL AUTOMATIC BREW CIRCUITSCHEMATIC WIRING DIAGRAM CWTBP2P1 FRONTRE

Page 3USER NOTICESCarefully read and follow all notices in this manual and on the equipment. All labels on the equipment should be kept in good condi

Page 30P3P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR.BLUP1REDOPTIONAL AUTOMATIC BREW CIRCUITSCHEMATIC WIRING DIAGRAM CWTAP2P1 FRONTRE

Page 31P3BLKP1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR.WHIBLKSOLBLU BLUWHIBREWTIMERP1P2WHIOPTIONAL AUTOMATIC BREW CIRCUITSCHEMATICW

Page 32READY INDICATORBLKBLUSW. & THERMOSTATP3BLKP1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR.WHIBLKSOLBLU BLUWHIBREWTIMERP1P2WHIO

Page 4 Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.Model 35 requires 3-w

Page 5 MODELS W/OUT FAUCETModels CT, CWT, CTF, CWTF, SINGLE CW & SINGLE CWF1. Flush the water line and securely attach it to the flare fitting on

Page 6INITIAL SET-UPCAUTION - The brewer must be disconnected from the power source throughout the initial set-up, except when specified in the instruc

Page 7tion on the circuit board. To increase a batch size. Press and hold the START or BREW switch until three clicks are heard. Release the switch (

Page 8TROUBLESHOOTINGA troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the pr

Page 9TROUBLESHOOTING (cont.)PROBLEMBrew cycle will not start (cont.) (CT, CTF, CWT, CWTA, CWTB, CWTF, CWTFA, CWTFB, SINGLE CW & SINGLE CW