Instruction/ maintenance manual of the product CWTF-MV Bunn
Go to page of 31
OPERA TING & SER VICE MANU AL B UNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 28182.
Page 2 INTRODUCTION This equipment will brew a half-gallon batch of coffee into an awaiting dispenser. It can be easily configured for 120V 15 amp, 120V 20 amp, 120/208V 20 amp or 120/240V 20 amp. The brewer has a hot water faucet for allied beverage use.
Page 3.
Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Requires 2-wire, grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz. Requires 2-wire, grounded service rated 120 volts ac, 20 amp, single phase, 60 Hz.
Page 5 1. Flush the water line and securely attach it to the tee. 2. Turn on the water supply. 3. Place an empty vessel beneath the faucet and lift the handle until water is dispensed.
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.
Page 7 28182 090100 2. Setting batch sizes. T o set a batch volume, first check that the SET/LOCK switch is in the "SET" position on the circuit board. Press and hold the ST ART or BREW switch until three distinct clicks are heard, and then release the switch.
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.
Page 9 TROUBLESHOOTING (cont.) PROBLEM Brew cycle will not start (cont.) Water is not hot PROBABLE CAUSE REMEDY 5. Timer 6. Solenoid Valve 7. Water strainer/flow control (.222 GPM) 1. Tank Heater Switch 2. Limit Thermostat CAUTION - Do not eliminate or bypass limit thermostat.
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 - Tank 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 flows into tank continuously (ON/OFF Switch "ON") Water flows into tank continuously (ON/OFF Switch "OFF") Beverage overflows 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 Type 2. Coffee Grind 3. Sprayhead 4. Funnel Loading 5. Water Temperature 1. Funnel Loading 1. Solenoid 2.
Page 13 TROUBLESHOOTING (cont.) PROBLEM Brewer is making unusal noises (cont.) Low beverage serving tempera- ture (CWTF Only) PROBABLE CAUSE 4. Tank Heater(s) 1. Warmer REMEDY Remove and clean lime off the tank heater(s). See page 21 Refer to Service - Warmer ele- ment for testing procedures.
Page 14.
Page 15 SERVICE (cont.) CONTROL THERMOSTAT Location: The control thermostat is located inside the trunk on the upper left side of the component bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. Locate the blue wire on the control thermostat.
Page 16 SERVICE (cont.) FUSE HOLDER AND FUSE ASSEMBLY.
Page 17 LIMIT THERMOSTAT Location: The limit thermostat is located inside the rear of the hood on the center rear of the tank lid. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the blue and black wires from the limit thermostat.
Page 18.
Page 19 Location: The solenoid valve is located inside the trunk on the lower center part of the component bracket. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect both wires from the solenoid valve. Connect the brewer to the power source.
Page 20 SERVICE (cont.) START SWITCH.
Page 21 TANK HEATERS Location: The tank heaters are located inside the tank and secured to the tank lid. Test Procedures: 1. Disconnect the brewer from the power supply.
Page 22 SERVICE (cont.) TANK HEATERS (cont.) 17. Refer to Fig.14 when reconnecting the tank heater wires. FIG. 14 TANK HEATER TERMINALS P1420 28182 021500.
Page 23 SERVICE (cont.) 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. Disconnect the black wire from the limit thermo- stat.
Page 24 SERVICE (cont. TANK HEATER SWITCH (cont.) 15. Reconnect the two black wires to the tank heater switch terminals. 16. Set tank assembly inside the hood on mounting brackets and secure with two #8-32 screws. 17. Reconnect the wires to the limit thermostat and tank heaters.
Page 25 THERMAL FUSES.
Page 26 P1136 SERVICE (cont.) FIG. 20 TIMER TERMINALS Location: The timer is located inside the front of the trunk on the upper right side of component bracket.
Page 27 SERVICE (cont.) DIGITAL TIMER (Late Models) FIG. 21 DIGITAL TIMER.
Page 28 SERVICE (cont.) T o increase a brew volume, place the ON/OFF switch in the “ON” position, press and hold the ST ART switch until three clicks are heard.
Page 29 SERVICE (cont.) WARMER ELEMENT(S)(CWTF MODELS ONLY) Location: The warmer elements are located under the warmer plates. Test Procedures: 1. Disconnect the brewer from the power source.
Page 30.
Page 31 SCHEMA TIC WIRING DIAGRAM FOR CWT -APS MV , CWTF-APS MV , CWTF-TS MV , CWTF-TSR MV 28182 090100.
An important point after buying a device Bunn CWTF-MV (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 CWTF-MV 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 CWTF-MV - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn CWTF-MV you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn CWTF-MV will certainly help you make a decision on the purchase.
If you already are a holder of Bunn CWTF-MV, 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 CWTF-MV.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn CWTF-MV. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn CWTF-MV 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
