Table of Contents
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BUNN
OPERATING & SERVICE MANUAL
10737.0000L 10/01 ©1993 Bunn-O-Matic Corporation
O N
O N
T
A
N
K
O FF
O FF
P
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P
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T
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AR
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NT
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U T
CA
CA
C A
C A
D
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DI
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SC
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IF :
IF :
D
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. CR
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AC
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TC
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Y
Y
PT
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D
D
DR
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EM
EM
E
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ILE
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WH
WH
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AM
AM
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. BO
ED
ED
H
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FL
FL
TR
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IC
IC
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AT
AT
HIG
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S IN
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SK
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LY
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5 BUN
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198
198
IL UR
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658
658
PN:
PN:
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
CWT TWIN
®
CWTF TWIN
CWTF TWIN-APS
S
S
IE
IE
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R
S
S
W
W
C
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Y
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E A
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N
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U
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B
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PN:
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5 BUN
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198
198
PN:
PN:
658
658
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Table of Contents
Related Manuals for Bunn CWT TWIN
Summary of Contents for Bunn CWT TWIN
- Page 1 . HE . HE . US . US . OR . OR 5 BUN 5 BUN OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 www.bunnomatic.com 10737.0000L 10/01 ©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 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. #00658.0000 #00831.0000 #00656.0000 #12364.0000 10737 121598 Page 3...
- Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. L2 RED L2 RED 230V.A.C. 120V A.C. L3 BLUE WHITE 208 or 240V.A.C. 230V.A.C. NEUTRAL 120V A.C. 230V.A.C. L1 BLACK L1 BLACK P2193 P1841 P2260...
- Page 5 " 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 6 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.
-
Page 7: Cleaning
NOTE – The "ON/OFF" switch must be in the "ON" upper position to initiate and complete a brew cycle. 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. - 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 electrical equipment should be performed only by qualified service personnel.
- Page 9 TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY PROBLEM 3. ON/OFF Switch Refer to Service - ON/OFF Switch Brew cycle will not start (cont.) for testing. See page 16 4. Start Switch Refer to Service - Start Switch for testing procedures. See page 20 5.
- Page 10 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Inconsistent beverage level in dis- 1. Strainer/flow control (.222 (A) Direction of flow arrow must penser GPM) be pointing towards the brewer. (B) Remove the strainer/flow con- trol and check for obstruction. Clear or replace. 2.
- Page 11 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming 2. Control Thermostat Refer to Service - Control Ther- (cont.) mostat for testing procedures. See page 15 Dripping from sprayhead 1. Syphon System The brewer must be level or slightly lower in front to syphon properly.
- Page 12 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.
- Page 13 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brewer is making unusal noises 4. Tank Heater Remove and clean lime off the (cont.) tank heater. See page 21 Refer to Service - Warmer ele- Low beverage serving tempera- 1. Warmer ture ment for testing procedures. See page 27 10737 120800 Page 13...
-
Page 14: Table Of Contents
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. -
Page 15: Control Thermostat
SERVICE (cont.) terminal block when the control thermostat is turned fully clockwise. Connect the brewer to the CONTROL THERMOSTAT power source. The indication must be: a) 120 volts ac for three wire 120/240 volt models. b) 200 volts ac for two wire 200 volt volt models. c) 240 volts ac for two wire 240 volt models. -
Page 16: Limit Thermostat
SERVICE (cont.) LIMIT THERMOSTAT ON/OFF SWITCHES ON/LOWER START ON/LOWER START 0/2 Models P2197 ON/OFF BREW ON/OFF BREW FIG. 4 LIMIT THERMOSTAT Location: The limit thermostats are located inside the rear of 2/2 Models the hood on the center rear of the tank lids. Test Procedures: 1. - Page 17 SERVICE (cont.) 6. Reinstall front end cap. ON/OFF SWITCHES (cont.) 7. On models with faucet reinstall faucet and connect Test Procedure: brewer to the water supply. 1. Disconnect the brewer from the power source. 8. Refer to Fig. 7 when reconnecting the wires. 2.
-
Page 18: Recovery Booster
SERVICE (cont.) source. With the "ON/OFF" switch in the "ON" RECOVERY BOOSTER RELAY (OPTIONAL 2/2 & 0/6 position and the start switch pressed and released, ONLY) check for continuity across relay terminals. 7. Disconnect the brewer from the power source. If continuity is present as described, reconnect the blue and black wires to the relay contact terminals. -
Page 19: Solenoid Valve (Inlet)
SERVICE (cont.) SOLENOID VALVES 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. -
Page 20: Start Switch (Brew)
SERVICE (cont.) 3. Check for continuity across the two terminals on the switch when it is held in the lower position. START SWITCHES Continuity must not be present across these ter- minals in the upper position. If continuity is present as described, reconnect the ON/LOWER START ON/LOWER... -
Page 21: Tank Heater
If continuity is present as described, reconnect the SERVICE (cont.) wires, the tank heater is operating properly. TANK HEATER If continuity is not present as described, replace the tank heater. NOTE- If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath. P2197 FIG. -
Page 22: Tank Heater Switch
SERVICE (cont.) TANK HEATER SWITCH TANK HEATER (Cont.) 6. Remove sprayhead and the hex nut securing the sprayhead tube to the hood. Set aside for reas- sembly. 7. Remove the eight #8-32 nuts securing the tank lid to the tank. 8. - Page 23 SERVICE (cont.) 15. Reconnect the two black wires the tank heater 5. Check for continuity between the black wire re- switch terminals. moved from the limit thermostat and the black 16. Set tank assembly inside the hood on mounting insert on the terminal block. with the tank heater brackets and secure with two #8-32 screws.
-
Page 24: Timer (Early Models)
6. Disconnect the brewer from the power source. SERVICE (cont.) 7. Reconnect the three pin connector from main TIMERS (Early Models) wiring harness to the timer. If voltage is present as described, proceed to #7 If voltage is not present as described, refer to Wiring Diagrams and check the brewer wiring harness. -
Page 25: Digital Timer (Late Models)
SERVICE (cont.) 6. With a voltmeter, check the voltage across termi- DIGITAL BREW TIMER (Late Models) nals TL1 and TL4 when the "ON/OFF" switch is in the "ON" position. Connect the brewer to the power source. The indication must be 0 volts. If voltage is as described, proceed to #7. - Page 26 SERVICE (cont.) NOTE: Several ounces of water will continue to sy- DIGITAL BREW TIMER (Late Models)(cont.) phon from the tank after turning the switch "OFF". The 1. Modifying brew volumes. To modify a brew vol- brewer remembers this volume and will continue to ume, first check that the SET/LOCK switch is in the brew batches of this size until the volume setting pro- "SET"...
-
Page 27: Warmer Element
SERVICE (cont.) If continuity is not present as described, replace the warmer element. WARMER ELEMENTS (Not used on APS Models) Removal and Replacement: 1. Remove the three #4-40 screws securing the warmer assembly to the brewer. 2. Lift the warmer assembly from the brewer. 3. -
Page 28: Wiring Diagrams
SCHEMATIC WIRING DIAGRAM CWT/CWTF TWIN 0/2, 2/2, 4/2 & CWT TWIN-APS LT. READY INDICATOR GREEN (FAUCET) LT. SW. & THERMOSTAT LT.LIMIT THERMAL THERMOSTAT SAFETY FUSE LEFT TANK HEATER LEFT "KEEP WARM" HEATER RT. READY INDICATOR RT. SW. & THERMOSTAT RT. LIMIT... - Page 29 SCHEMATIC WIRING DIAGRAM CWT TWIN 2/2 & 4/2 W/RECOVERY BOOSTER GREEN (FAUCET) THERMAL LT. SW. & THERMOSTAT LT. LIMIT FUSE THERMOSTAT LEFT TANK HEATER K1 N.O. LEFT "KEEP WARM" HEATER RT. SW. & THERMOSTAT RT. LIMIT THERMOSTAT RIGHT TANK HEATER K2 N.O.
- Page 30 P5-1 P4-1 P4-2 BRN/BLK BRN/BLK RIGHT FRONT WARMER LEFT FRONT WARMER SW12 SW10 P5-2 P4-3 WHI/VIO WHI/VIO LEFT REAR WARMER RIGHT REAR WARMER 120/240 VOLTS AC 3 WIRE SINGLE PHASE 10741.0000F 12/00 © 1993 BUNN-O-MATIC CORPORATION 10737 120100 Page 30...
- Page 31 LEFT FRONT WARMER RIGHT FRONT WARMER SW5-L SW5-R P2-3L P2-3R RIGHT REAR WARMER LEFT REAR WARMER TWO INDIVIDUAL BRANCH CIRCUITS REQUIRED EACH RATED 120/240 VOLTS AC 3 WIRE SINGLE PHASE 10847.0000C 12/00 © 1994 BUNN-O-MATIC CORPORATION 10737 120100 Page 31...
- Page 32 P5-1 P4-1 P4-2 BRN/BLK BRN/BLK RIGHT FRONT WARMER LEFT FRONT WARMER SW10 SW12 P5-3 P4-3 WHI/VIO WHI/VIO RIGHT REAR WARMER LEFT REAR WARMER 120/240 VOLTS AC 3 WIRE SINGLE PHASE 27693.0000C 12/00 © 1996 BUNN-O-MATIC CORPORATION 10737 120100 Page 32...
- Page 33 RIGHT TOP FRONT WARMER MODEL 4/2 ONLY P5-3 P5-1 WHI/VIO WHI/VIO LEFT TOP REAR WARMER SW10 P5-2 WHI/BRN WHI/BRN RIGHT TOP REAR WARMER 230 VOLTS AC 3 WIRE THREE PHASE 10736.0001G 12/00 © 1993 BUNN-O-MATIC CORPORATION 10737 120100 Page 33...
- Page 34 RIGHT TOP FRONT WARMER MODEL 4/2 ONLY P5-3 P5-1 WHI/VIO WHI/VIO LEFT TOP REAR WARMER SW10 P5-2 WHI/BRN WHI/BRN RIGHT TOP REAR WARMER 200 OR 240 VOLTS AC 2 WIRE SINGLE PHASE 10736.0002J 12/00 © 1993 BUNN-O-MATIC CORPORATION 10737 120100 Page 34...