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™
DUAL
(Serial # DUAL010000 - Up)
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
27040.0000F 01/04 ©1996 Bunn-O-Matic Corporation
www.bunnomatic.com
! WARNING
DISCONNECT FROM POWER SOURCE
BEFORE REMOVAL OF ANY PANEL OR
REPLACEMENT OF ANY COMPONENT!
GRINDER
L R
E I
F HG
1⁄2 gal 1 gal 1 1⁄2 gal T T 1⁄2 gal 1 gal 1 1⁄2 gal
READY SELECTOR ON / WARMER START START ON / WARMER SELECTOR READY
! CA
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INTRODUCTION This equipment will brew two half-gallon, gallon, or gallon and a half batches of coffee into awaiting servers at the push of a button. The brewer is also equipped with a hot water faucet for allied beverage use and is designed ® ® to interface with a BUNN Grinder. The brewer is specifically designed for use with a BUNN 1.5 GPR server. It is only for indoor use on a sturdy counter or shelf. BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment man
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Electrical Hook-Up CAUTION – Improper electrical installation will damage electronic components. 1. An electrician must provide electrical service as specified. 2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source. 3. Remove the front panel beneath the sprayheads. Models with electronic control assemblies: Place the tank heater switch at the top of the control assembly in the “OFF” position. Models with electro/mechanical thermostats: Rotate the con
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INITIAL SET-UP (cont.) Models with electronic control assemblies: Place the tank heater switch at the top of the control assembly in the “ON” position and replace the front panel. Models with electro/mechanical thermostats: Rotate the control thermostat knob fully clockwise to the “ON” position and replace the front panel. 4. Wait approximately twenty minutes for the water in the tank to heat to the proper temperature. 5. Place an empty server beneath either brew station and the ON/OFF switch in
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INITIAL SET-UP (cont.) 8. Repeat step 7 until the proper water volume is achieved. 9. Repeat steps 5 through 8 for the remaining brew station. 10. The brewer is now ready for use in accordance with the coffee brewing instructions. ADJUSTING BREW VOLUMES CAUTION - Disconnect the power source from the brewer prior to the removal of any panel for the replacement or adjustment of any component. NOTE: Prior to setting or modifying batch sizes, check that the brewer is connected to water supply, the
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INITIAL SET-UP (cont.) COFFEE BREWING 1. Select the desired batch size. ® 2. Insert a BUNN filter into the funnel. 3. Pour the proper amount of fresh ground coffee into the filter and level the bed of grounds by gently shaking. 4. Slide the funnel into the funnel rails. 5. Place an empty server under the funnel. 6 Place the On/Off switch in the lighted upper position. Momentarily press and release the start switch. 7. When brewing is completed, simply discard the grounds and filter. CLEANING 1.
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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. • All electronic components have 120 - 240 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Brew cycle will not start (cont.) 3. ON/OFF switch Refer to Service - ON/OFF switch for testing procedures. See page 32 4. Start switch Refer to Service - Start switch for testing procedures. See page 37 5. Timer Refer to Service - Timer for testing procedures. See page 39 or 42 6. Dispense Valve Refer to Service - Dispense valve for testing procedures. See page 22 7. Control Assembly (Electronic) Refer to Service - Control assembly for tes
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TROUBLESHOOTING (cont.) Problem Remedy Probable Cause Water from tank is not hot (cont.). Refer to Service - Relay for testing 6. Relay (Brewers with Recovery procedures. See page 34 Booster) Server warmer is not hot. Refer to Service - ON/OFF switch for 1. ON/OFF switch testing procedures. See page 32 Refer to Service - Warmer element for testing procedures. See page 44 2. Warmer element Spitting or unusual steaming from Refer to Service - Control thermo- 1A. Control thermostat (Electro/me- sp
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TROUBLESHOOTING (cont.) Remedy Problem Probable Cause Inconsistent beverage level in 3. Dispense valve Refer to Service - Dispense valve for testing procedures. See page 22 server (cont.). Adjust the timer as required to Consistently high or low beverage 1. Timer adjustment level in server. achieve the recommended volume for each brew cycle. Dripping from sprayhead. 1. Dispense valve Refer to Service - Dispense valve for testing procedures. See page 22 Water overflows filter. 1. Bypass valve Ref
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Weak beverage (cont.) 3. Sprayhead A clean sprayhead should be used to properly wet the bed of ground cof- fee in the funnel. ® The BUNN paper filter should be 4. Funnel loading centered in the funnel and the bed of ground coffee leveled by gentle shak- ing. Empty the server, remove its cover, 5. Water temperature and place the server on the warmer. Place empty funnel over the server entrance, with ON/OFF switch in the "ON" position press the
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L L H H C C I I SERVICE The top cover is attached with four #4-40 slotted This section provides procedures for testing and head screws. replacing various major components used in this brewer should service become necessary. Refer to The front inspection panel is attached with five #6- Troubleshooting for assistance in determining the 32 slotted head screws. cause of any problem. WARNING - Inspection, testing, and repair of electri- The warmer base is attached with four #6-32 cal equipment shoul
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SERVICE (cont.) 12. Reconnect the pink wire to the grind switch. BREW SELECTOR SWITCH 13. Disconnect the tan wire from the left or right selector switch and tan wire from interface socket. 14. Check for continuity across the tan wires. 15. Reconnect the tan wires. 16. With the selector switch set at 1 and 1-1/2 gallon, disconnect the white/violet from the bypass valve. 17. Check for continuity across the white/violet wire and terminal on bypass valve. 18. Reconnect the white/violet wire to the t
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SERVICE (cont.) WHI/VIO to Left or Right By-Pass Valve To Left or Right Timer WHI/RED to Left or Right Dispense Valve TAN GRY to Left or Right Selector Switch GRY to GRY Lead on Interface Socket PNK PNK from Left Switch to Grinder Switch (Lower Left) PNK from Right Switch to Grinder Switch (Lower Right) TAN to Left or Right Selector Switch to TAN Lead on Interface Socket P776 FIG. 4 BREW SELECTOR SWITCH TERMINALS 27040 032201 Page 17
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SERVICE (cont.) BLK T2 to Left Tank Heater RED L1 to Terminal Block BLK T2 to Right Tank Heater (Red Insert) CONTACTOR ASSEMBLY (cont.) RED T1 to Left Tank Heater BLK L2 to Terminal Block RED T1 to Right Tank Heater Test Procedures : (Black Insert) Electronic Control (Brewers w/Recovery Booster) 1. Disconnect the brewer from the power source. BLK to WHI Lead from the 2. Disconnect the gray wire from the black wire on Three Pole 120/208V or 120/240V Terminal Block the rear of the contactor coil
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