Instruction/ maintenance manual of the product CWT TWIN Bunn
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CWT TWIN CWTF TWIN CWTF TWIN-APS.
Page 2 INTRODUCTION This equipment will brew one or two half-gallon batches of coffee simultaneously into awaiting dispensers (with just the press of a button). One side may include a hot water faucet for allied beverage use. It is only for indoor use on a sturdy counter .
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.
Page 4 ELECTRICAL HOOK-UP CAUTION – Improper electrical installation will damage electronic components. 1. An electrician must provide electrical service as specifi ed. 2. Using a voltmeter , check the voltage and color coding of each conductor at the electrical source.
Page 5 Models CWT & CWTF PLUMBING REQUIREMENTS These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi (138 and 620 kPa) from a 1 ⁄ 2 " or larger supply line. A shut-off valve should be installed in the line before the brewer .
Page 6 INITIAL SET -UP CAUTION - The brewer must be disconnected from the power sour ce throughout the initial set-up, except when specifi ed in the instructions. 1. Insert an empty funnel into the funnel rails. 2. Place an empty dispenser under the funnel.
Page 7 10737 100801 OPERA TING CONTROLS 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 fl ow of water into the funnel until the tank syphons down to its proper level.
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 T echnical Service Department.
Page 9 TROUBLESHOOTING (cont.) PROBLEM Brew cycle will not start (cont.) Water is not hot PROBABLE CAUSE REMEDY 10737 120800 Refer to Service - ON/OFF Switch for testing. See page 16 Refer to Service - Start Switch for testing procedures. See page 20 Refer to Service - Timer for testing procedures.
Page 10 TROUBLESHOOTING (cont.) PROBLEM Inconsistent beverage level in dispenser Consistently low beverage level in the dispenser Spitting or excessive steaming PROBABLE CAUSE 1. Strainer/flow control (.222 GPM) 2. Syphon System 3. Lime Build-up CAUTION - T ank and tank compo- nents should be delimed regularly depending on local water condi- tions.
Page 11 TROUBLESHOOTING (cont.) PROBLEM Spitting or excessive steaming (cont.) Dripping from sprayhead Water fl ows into tank continuously (ON/OFF Switch "ON") Water fl ows into tank continuously (ON/OFF Switch "OFF") Beverage overfl ows dispenser PROBABLE CAUSE 2.
Page 12 TROUBLESHOOTING (cont.) PROBLEM Weak beverage Dry coffee grounds remain in the funnel Brewer is making unusal noises PROBABLE CAUSE 1. Filter T ype 2. Coffee Grind 3. Sprayhead 4. Funnel Loading 5. Water T emperature 1. Funnel Loading 1. Solenoid 2.
Page 13 TROUBLESHOOTING (cont.) PROBLEM Brewer is making unusal noises (cont.) Low beverage serving tempera- ture PROBABLE CAUSE 4. T ank Heater 1. Warmer REMEDY Remove and clean lime off the tank heater . See page 21 Refer to Service - Warmer ele- ment for testing procedures.
Page 14 O N O N O F F OFF T A N K C AU T IO N : W A R M E R S A ND S U R F A C E S A R E H O T CA UT I O N C A U T I ON D I S C A R D D E C AN T E R D I S C A R D D E C AN T E R I F : I F : . CRA CKE D . CR AC K E D . S C RA T C H E D . S C R A T C H E D .
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Page 17 SERVICE (cont.) 10737 100801 ON/OFF SWITCHES (cont.) T est Procedure: 1. Disconnect the brewer from the power source. 2. Viewing the switch from the back remove the white or red wire from the upper terminal and the black wire from the center terminal.
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Page 20 APS Models ST ART SWITCHES SERVICE (cont.).
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Page 23 SERVICE (cont.) 10737 120800 Diagrams and check the brewer wiring harness. 5. Check for continuity between the black wire re- moved from the limit thermostat and the black insert on the terminal block. with the tank heater switch in the "ON" upper position.
Page 24 O N ON O F F O F F T A N K USE COPPER WIRE ONLY FOR POWER SUPPLY CONNECTIONS USE COPPER WIRE ONLY FOR POWER SUPPLY CONNECTIONS 1 2 3 4 5 .5 MINUTES BUNN-O-MATIC P/N 2235-120 VAC 1 2 3 4 5 .
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Page 26 10737 120800 BLU/BLK wire from TL5 to P1 WHI/GRN wire from TL4 to (WHI) Solenoid WHI/BLU wire from TL3 to (BLK) Solenoid WHI wire from TL2 to P2 BLK wire from TL1 to P3 FIG. 22 DIGIT AL TIMER WIRING P2037 DIGIT AL BREW TIMER (Late Models)(cont.
Page 27 O N ON O FF O F F T A N K C A U T I O N : W A R M E R S A N D S U R F AC E S A R E H OT C A U T IO N CAU TI ON DI SCAR D DE C A NT E R D I SC A RD D ECA N T E R I F : I F : . C R AC K E D . CR A C K ED . S C R A T C H E D . S C R A T C H E D .
Page 28 WHI/RED (NOT AVAILABLE ON CWT TWIN-AP S ) LEFT LOWER WARMER WHI/RED WHI/GRN P1-2 P1-3 P4-2 P4-3 SCHEMATIC WIRING DIAGRAM CWT/CWTF TWIN 0/2, 2/2, 4/2 & CWT TWIN-APS L1 GREEN N L2 (FAUCET) THERMAL S AFETY FU S E BLK RIGHT TANK HEATER BLK BLK BLK RED BLU BLK BLK S W2 RT.
Page 29 P4-2 P4-3 SCHEMATIC WIRING DIAGRAM CWT TWIN 2/2 & 4/2 W/RECOVERY BOOSTER L1 GREEN N L2 RED WHI WHI WHI LEFT TOP WARMER RIGHT TOP WARMER.
Page 30 GRY PIN L.E.D. L.E.D. GRY PIN GRY PIN OPTIONAL INDICATOR TIMER WHI/RED WHI/GRN P1-2 P1-3 SCHEMATIC WIRING DIAGRAM CWTF TWIN 0/6 L1 GREEN (FAUCET) BLK BLK RIGHT TANK HEATER BLK BLU BLK BLK S W2 RT. LIMIT THERMO S TAT RT. READY INDICATOR RT. S W.
Page 31 BLK WHI RED BLU TANK HEATER BLK LIMIT THERMO S TAT LIMIT THERMO S TAT S W1-L S W1-R (FAUCET S IDE) "KEEP WARM" HEATER SCHEMATIC WIRING DIAGRAM CWTF TWIN 4/2 & 0/6 TWO-CIRCUIT GREEN GREEN L2 N L1 LEFT L2 N L1 RIGHT 10 8 47.
Page 32 WHI/RED WHI/GRN P1-2 P1-3 SCHEMATIC WIRING DIAGRAM CWTF TWIN 0/6 WITH RECOVERY BOOSTER L1 GREEN (FAUCET) THERMAL S AFETY FU S E BLK BLK RIGHT TANK HEATER BLK BLU BLK BLK S W2 RT.
Page 33 WHI/RED WHI/GRN P1-2 P1-3 P4-2 P4-3 SCHEMA TIC WIRING DIAGRAM CWTF A TWIN 2/2, 4/2 & TWIN-APS L1 GRN/YEL L2 L3 RIGHT T ANK HEATER BLK BLU RT .
Page 34 BLK WHI/RED WHI/GRN P1-2 P1-3 P4-2 P4-3 SCHEMATIC WIRING DIAGRAM CWTFA & CWTFB TWIN 2/2 & 4/2 L1 GRN/YEL L2 (FAUCET) THERMAL FUSE BLK RIGHT TANK HEATER BLK RED BLU BLK BLK SW2 RT.
Page 35 BLK WHI/RED WHI/GRN P1-2 P1-3 P4-2 P4-3 SCHEMA TIC WIRING DIA GRAM CWTF A 2/2 TWIN, CWTF A 4/2 TWIN & CWTF A TWIN-APS L1 L2 10736.0004A 02/06 © 2006 BUNN-O-MA TIC CORPORA TION 230 VOL TS .
An important point after buying a device Bunn CWT TWIN (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn CWT TWIN yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn CWT TWIN - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn CWT TWIN you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn CWT TWIN will certainly help you make a decision on the purchase.
If you already are a holder of Bunn CWT TWIN, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn CWT TWIN.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn CWT TWIN. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn CWT TWIN along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
