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®
BUNN
SRUA
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
10067.0003A 07/02 ©2002 Bunn-O-Matic Corporation
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INTRODUCTION This brewer will brew a three gallon batch of coffee into the reservoir, which has its own dispensing faucet.The brewer also has a hot water faucet for allied beverage use. It is only for indoor use on a sturdy counter. BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specified below: 2 years parts and 1 year labor. 2) Electronic circuit and/or control boards: parts and labor for 3
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USER NOTICES Carefully read and follow all notices on the brewer and in this manual. They were written for your protection. All notices on the brewer are to be kept in good condition. Replace any unreadable or damaged labels. #00656.0000 #00831.0000 ATTENTION: TURN OFF WHEN UNATTENDED #10044.0000 #00878.0000 #03408.0000 #12593.0000 #03409.0000 #12555.0000 #29299.0000 10067.3 070102 Page 3
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ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. L2 RED 230V A.C. L1 BLACK P1842 SRUA Models require 2-wire, grounded service rated 230 volts ac, 30 amp, single phase, 50 Hz. Proceed as follows: ELECTRICAL INSTALLATION INSTRUCTIONS CAUTION – Improper electrical installation can damage the equipment and injure the installer. The chassis must be properly grounded. Do not assume a plumbing line will provide an ad
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PLUMBING REQUIREMENTS(cont.) Plumbing Hook-up 1. Make certain the 3/8" female flare fittings on the short tube from the outlet of strainer (supplied) is securely attached to the male fitting at the bottom rear of the brewer. 2. Flush the water line and securely attach it to the 3/8" male flare fitting on the inlet of the strainer. 3. Turn on the water supply. 4. Inspect the connection for leaks. This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and
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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 tank is properly filled, and a funnel support, funnel and funnel cover are in place. 1. Modifying batch sizes. To modify a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. To increas
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COFFEE BREWING 1. Brew cycles may be started whenever water temperature is correct. This condition is indicated by the dial thermometer on front of the brewer. Whenever the pointer is in the green, brewer is ready for brewing. ® filter in funnel and add desired amount of coffee. 2. Insert a Bunn 3. Level the bed of coffee and place funnel into the funnel support. Place funnel cover over the funnel and be sure the water swing spout is over the center of the funnel cover. 4. Turn "ON/OFF" switch
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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 230 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the appl
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TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY PROBLEM 6. Start Switch Brew cycle will not start (cont.) Refer to Service - Start Switch for testing procedures. See page 24 7. Timer Refer to Service - Timer for testing procedures. See page 28 or 29 8. Pump Refer to Service - Pump for testing procedures. See page 21 9. Solenoid Valve Refer to Service - Solenoid Valve for testing procedures. See page 23 10. Strainer (A) Direction of flow arrow must be pointing towards brewer. (B) Remove the straine
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water running out of the overflow 1. Brewer not level Brewer must be level and installed on a sturdy structure. 2. Solenoid Valve Refer to Service - Solenoid Valve for testing procedures. See page 23 3. Liquid Level Board Refer to Service -Liquid Level Board for testing procedures. See page 18 4. Probe Refer to Service - Probe for test- ing procedures. See page 18 1. Limit Thermostat Water is not hot Refer to Service - Limit Thermo- CAUTION
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Water keeps running from swing 1. Timer Refer to Service - Timer for testing spout procedures. See page 28 or 29 2. Start Switch Refer to Service - Start Switch for testing procedures. See page 24 Inconsistent coffee yield 1. Timer Refer to Service - Timer for testing procedures. See page 28 or 29 2. Solenoid Valve Refer to Service - Solenoid Valve for testing procedures. See page 23 3. Lime build-up in swing spout Remove swing spout and inse
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Be sure coffee reservoir is empty Coffee reservoir overflows 1. Coffee reservoir not completely before brew cycle is started. empty before a brew cycle was started. Refer to Service -Timer for test- 2. Timer ing procedures. See page 28 or 29 Check pump flow rate with a watch. 3. Pump - Flow Rate Pump flow rate should be approxi- mately 24 ounces in 15 seconds. Be sure pump assembly is free of any obstructions. Plumbing lines should not be r
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! WARNING DISCONNECT FROM POWER SOURCE BEFORE REMOVAL OF ANY PANEL OR REPLACEMENT OF ANY COMPONENT! SERVICE Contents Contactor ............................................................. 14 This section provides procedures for testing and Control Thermostat.............................................. 15 replacing various major components used in this Fuse and Fuse Holder .......................................... 16 brewer should service become necessary. Refer to Limit Thermostat .........
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SERVICE (cont.) If voltage is present as described, proceed to #9. If voltage is not present as described, refer to the CONTACTOR wiring diagram and check the brewer wiring harness. 9. Check for continuity across the terminals on the left side of the contactor by manually closing the contacts. Continuity must not be present when the contact is released. 10. Check for continuity across the terminals on the right side of the contactor by manually closing the contacts. Continuity must not be presen
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SERVICE (cont.) Removal and Replacement: CONTROL THERMOSTAT 1. Disconnect the wires from the control thermostat. 2. Remove the thermostat capillary bulb by firmly pulling up on the capillary at the component bracket. This will disengage the grommet from the compo- nent bracket. 3. Remove the #8-32 screw securing the control thermostat and mounting bracket to the compo- nent bracket. Remove control thermostat and bracket as an assembly. 4. Remove knob from control thermostat. 5. Remove the two #6
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SERVICE (cont.) Fuse Holder: FUSE AND FUSE HOLDER 1. Disconnect the wires from the rear of the fuse holder. 2. Remove the nut securing the fuse holder to the component bracket. 3. Push fuse holder through the hole in the compo- nent bracket. 4. Install new fuse holder and fuse through the hole in the component bracket and secure with nut. 5. Refer to Fig. 7 and reconnect the wires. RED from ON/OFF Switch P2176.30 FIG.6 FUSE AND FUSE HOLDER Location: The fuse and fuse holder are located on the re
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SERVICE (cont.) LIMIT THERMOSTAT RED to Main RED to Control Harness Thermostat P1984 P2180 FIG. 9 LIMIT THERMOSTAT TERMINALS FIG. 8 LIMIT THERMOSTAT Location: The limit thermostat is located on the center rear of the component bracket behind the tank heater. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the red wires from the limit thermo- stat. 3. Check for continuity across the limit thermostat terminals with an ohmmeter. If continuity is present as described,
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SERVICE (cont.) 7. Touching the free end of the jumper to the brewer's LIQUID LEVEL BOARD AND LEVEL PROBE frame simulates a "FULL" condition, preventing jumper from touching the brewer's frame simu- lates "NEED WATER" condition. Connect the brewer to the power source, simulate each condition while measuring the voltage between T1 and T3 on the liquid level board. The indication should be 0 volts with jumper touching the frame and 230 volts ac not touching the frame. Repeat these several times. K
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SERVICE (cont.) LIQUID LEVEL BOARD AND LEVEL PROBE (cont.) Removal and Replacement: 1. Remove all wires from the liquid level board. 2. Remove the #10-32 screw and flat washer secur- ing the protective shield to the component bracket. 3. Remove the #10-32 screw and internal tooth lockwasher securing the liquid level board to the component bracket. 4. Remove liquid level board and discard. 5. Install new liquid level board on component bracket and secure with a #10-32 screw and internal tooth loc
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! WARNING DISCONNECT FROM POWER SOURCE BEFORE REMOVAL OF ANY PANEL OR REPLACEMENT OF ANY COMPONENT! SERVICE (cont.) If continuity is present as described, the switch is operating properly. ON/OFF SWITCH If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove the wires from the switch terminals. 2. Compress the clips on the back side of the switch and gently push them through the opening. 3. Push the new switch into the opening and spread the clips to hol
