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OL & RL
(S/N RL00006929 & up)
INSTALLATION & OPERATING GUIDE
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
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Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at
www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and
manual updates. For Technical
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BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal servers and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor. 2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below: a) Electronic circuit and/or control boards - parts and labor for 3 years. b) C
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CONTENTS Introduction ................................................................2 User Notices ...............................................................3 Electrical Requirements ..............................................4 Plumbing Requirements .............................................4 Initial Set-Up ...............................................................5 Operating Controls ......................................................6 Coffee Brewing ................
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ELECTRICAL REQUIREMENTS CAUTION - Do not connect the brewer to the power source until specified in Initial Set-Up. L2 RED 200, 230 or 240V A.C. L1 BLACK MODELS OL15 & 20 require MODELS OL35 & RL35 require MODELS OLA, RLA, OL35B & MODEL OL25B requires 2-wire, grounded service rated 3-wire, grounded service rated RL35B require 2-wire, ground- 2-wire, grounded service 120 volts ac, 15 or 20 amp re- 120/208 or 120/240 volts ac, 20 ed service rated 240 volts ac rated 100 volts ac, 20 amp spectivel
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PLUMBING REQUIREMENTS This brewer must be connected to a cold water system with operating pressure between 20 and 90 psi from a 1/2” or larger supply line. A shut-off valve should be installed in the line before the brewer. Install a regulator in the line when pressure is greater than 90 psi to reduce it to 50 psi. The water inlet fitting is 1/4” flare. NOTE - Bunn-O-Matic recommends 1/4” copper tubing for installations of less than 25 feet and 3/8” for more than 25 feet from the 1/2” wat
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INITIAL SETUP CAUTION - The brewer must be disconnected from the power source throughout the initial setup, except when specified in the instructions. 1. Remove the top panel. 2. Rotate the control thermostat knob fully counterclockwise to the “OFF” position and replace the panel. 3. Insert an empty funnel into the funnel rails. 4. Place a decanter containing a small amount of water on the warmer beneath the funnel. 5. Connect the brewer to the power source, place the On/Off brew station warmer
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OPERATING CONTROLS A. On/Off Brew Station Warmer Switch Placing the switch in the upper position supplies power to the brew station warmer and enables brewing. Placing the switch in the lower position cuts power to the brew station warmer and stops brewing. Stopping a brew cycle after it has been started will not stop the flow of water into the funnel until the tank syphons down to its proper level. NOTE - The On/Off brew station warmer switch must be in the upper position to initiate and
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COFFEE BREWING Start each brew cycle with an empty, clean, half-gallon decanter. 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. 3. Slide the funnel into the funnel rails. 4. Place the On/Off brew station warmer switch in the upper position. 5. Momentarily press the start switch. 6. When brewing is completed, simply discard the grounds and filter. CLEANING 1. The use of a damp cloth rinsed in any mild, non-abrasiv
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TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encoun- tered. 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 electric components have 120 volt ac voltage on their terminals. Shorting of terminals or the application of external
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Brew cycle will not start. (cont.) 4. On/Off Brew Station Warmer Refer to Service - On/Off Brew Switch Station Warmer Switch for testing procedures. See page 15. Refer to Service - Start Switch for 5. Start Switch testing procedures. See page 17. Refer to Service - Relay for testing 6. Relay procedures. See page 21. 7. Solenoid Valve Refer to Service - Solenoid Valve for testing procedures. See page 20. Refer to Service - Solenoid Va
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Spitting or unusual steaming from 1. Control Thermostat Refer to Service - Control Thermo- sprayhead. stat for testing procedures. See page 13. 2. Lime build-up Inspect the tank assembly for ex- cessive lime deposits. Delime as CAUTION required. Tank and tank components should be delimed regularly depending on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reac- tions resulting i
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Beverage overflows decanter. 1. Beverage left in decanter The brew cycle should be started only with an empty decanter under the funnel. Weak beverage. 1. Type of paper filters BUNN® paper filters should be used for proper extraction. 2. Coffee A sufficient quantity of fine or drip grind coffee should be used for proper extraction. 3. Sprayhead B.O.M. sprayhead #01082.0000 should be used to properly wet the bed of ground coffee in the
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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. Component Access WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified WARNING - Disconnect the brewer from the power service personnel. The brewer should be disconnected source before the removal of any panel or t
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SERVICE (cont.) source. The indication must be as described in step 2. Voltage must not be indicated across Control Thermostat these terminals when the thermostat is turned “OFF” (fully counterclockwise). 5. Disconnect the brewer from the power source. If voltage is present as described, the control thermo- stat is operating properly. If voltage is not present as described, replace the control thermostat. Removal and Replacement: 1. Remove the top cover or top warmer housing from the brew
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SERVICE (cont.) Warmer(s) 5. Check for continuity from the wire terminal of the OL: Brew Station & Upper white or red wire to the splice or indicator lamp RL: Left Rear, Left Front, Brew Station, Right Rear & Right Front using the chart below. If continuity is present as described, proceed to #6. If continuity is not present as described, refer to the Wiring Diagrams and check the brewer wiring har- ness. 6. Check for continuity across the two terminals on the warmer. If continuity is prese
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SERVICE (cont.) Warmer Switch(es) If voltage is present as described, proceed to #4. OL: On/Off Brew Station & Upper If voltage is not present as described, refer to the Wir- RL: On/Off Brew Station ing Diagrams and check the brewer wiring harness. 4. Check the voltage across the other switch ter- minal and the terminal on the indicator lamp with white or red wires with a voltmeter when the switch is in the upper position. Connect the brewer to the power source. The indication must be as
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SERVICE (cont.) 4. Disconnect the brewer from the power source. Warmer Switch(es) RL: Left Rear, Left Front, Right Rear & Right Front If voltage is present as described, the switch is operat- ing properly. If voltage is not present as described, replace the switch. Removal and Replacement: 1. Remove the knob from the switch. 2. Loosen the 5/8” nut on the switch shaft and push the switch through the opening. 3. Remove the wires from the switch terminals. 4. Refer to FIG. 11 when reconnecting th
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SERVICE (cont.) If continuity is present as described, reconnect the wires, the switch is operating properly. Start Switch If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove all wires from the switch terminals. 2. Compress the clips inside the housing and gently push the switch through the opening. 3. Push the new switch into the opening and spread the clips to hold the switch captive in the hous- ing. 4. Refer to FIG. 14 when reconnecting the w
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SERVICE (cont.) Indicator Lamp(s) 4. Disconnect the brewer from the power source. If voltage is present, the indicator lamp is operating properly. If voltage is not present, replace the indicator lamp. Removal and Replacement: 1. Compress the clips inside the housing and gently push the indicator lamp through the opening. 2. Remove the wires from the indicator lamp termi- nals. 3. Refer to FIG. 17 when reconnecting the wires. 4. Push the new indicator lamp firmly into the opening. P1712 FIG.
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SERVICE (cont.) 4. Check for continuity across the limit thermostat Limit Thermostat terminals. If continuity is present as described, the limit thermo- stat is operating properly. If continuity is not present as described, replace the limit thermostat. Removal and Replacement: 1. Remove both wires from the limit thermostat terminals. 2. Carefully slide the limit thermostat out from under the retaining clip. 3. Carefully slide the new limit thermostat into the retaining clip. 4. Refer to F
