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Bunn RL00006929 - page 1
OL & RL (S/N RL00006929 & up) INST ALLA TION & OPERA TING GUIDE BUNN-O-MA TIC CORPORA TION POST OFFICE BO X 3227 SPRINGFIELD , ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 T o ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts Catalog, Programming Manual, or Service Manual, pl ...
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Bunn RL00006929 - page 2
Page 2 32430 030912 BUNN-O-MA TIC 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 ser vers and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor . 2) All ...
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Bunn RL00006929 - page 3
Page 3 00656.0001 CONTENTS Introduction ................................................................2 User Notices ...............................................................3 Electrical Requirements ..............................................4 Plumbing Requirements .............................................4 Initial Set-Up .......... ...
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Bunn RL00006929 - page 4
Page 4 ELECTRICAL REQUIREMENTS CAUTION - Do not connect the brewer to the power source until specified in Initial Set-Up. MODELS OL15 & 20 require 2-wire, grounded service rated 120 volts ac, 15 or 20 amp re- spectively , single phase, 60 Hz. MODELS OL35 & RL35 require 3-wire, grounded service rated 120/208 or 120/240 volts ac, 20 amp, sin ...
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Bunn RL00006929 - page 5
Page 5 P1478 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 ? ...
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Bunn RL00006929 - page 6
Page 6 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. Plac ...
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Bunn RL00006929 - page 7
Page 7 OPERA TING 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 int ...
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Bunn RL00006929 - page 8
Page 8 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. Momentaril ...
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Bunn RL00006929 - page 9
Page 9 Problem Equipment will not operate. Brew cycle will not start. Probable Cause 1. No power or incorrect voltage 1. No water 2. Water Strainer 3. Water Level Switch and Overflow Safety Switch Remedy (A) Connect the brewer to the power source. (B) Check the terminal block for the proper voltages. (C) Check circuit breaker/fuse. Check plumbing ...
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Bunn RL00006929 - page 10
Page 10 TROUBLESHOOTING (cont.) Problem Brew cycle will not start. (cont.) Water flows into fill basin continu- ously (On/Off brew station warmer switch “OFF”). Water flows into fill basin continu- ously (On/Off brew station warmer switch “ON”). Water is not hot. Decanter warmer is not hot. Probable Cause 4. On/Off Brew Station Warmer S ...
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Bunn RL00006929 - page 11
Page 11 TROUBLESHOOTING (cont.) Problem Spitting or unusual steaming from sprayhead. Warmer plates too hot, solenoid coil smoking, or water in tank heats excessively fast. Inconsistent beverage level in de - canter . Dripping from sprayhead. Probable Cause 1. Control Thermostat 2. Lime build-up CAUTION T ank and tank components should be delimed re ...
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Bunn RL00006929 - page 12
Page 12 TROUBLESHOOTING (cont.) Problem Beverage overflows decanter . Weak beverage. Brewer is making unusual noises. Probable Cause 1. Beverage left in decanter 1. T ype of paper filters 2. Coffee 3. Sprayhead 4. Funnel loading 5. Water temperature 1. Solenoid Valve 2. Plumbing lines 3. Water supply Remedy The brew cycle should be started only w ...
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Bunn RL00006929 - page 13
Page 13 FIG. 1 ACCESS P ANELS SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessar y . Refer to T roubleshooting for assistance in determining the cause of any problem. Component Access WARNING - Disconnect the brewer from the power source before the removal o ...
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Bunn RL00006929 - page 14
Page 14 FIG. 2 CONTROL THERMOST A T FIG. 3 THERMOST A T WIRING SERVICE (cont.) Control Thermostat Location: The control thermostat is located under the top cover or top warmer housing, FIG. 2. T o test the control thermostat, access will also be needed to the tank heater located in the bottom of the tank assembly . T est Procedure: 1. Disconnect th ...
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Bunn RL00006929 - page 15
Page 15 FIG. 4 WARMERS FIG. 5 WARMERS FIG. 6 WARMER WIRING SERVICE (cont.) Warmer(s) OL: Brew Station & Upper RL: Left Rear , Left Front, Brew Station, Right Rear & Right Front Location: OL: One of the warmers is beneath the brew funnel and the other is on the top lid, FIG. 4. RL: These warmers include the one beneath the brew funnel, the o ...
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Bunn RL00006929 - page 16
Page 16 FIG. 7 WARMER SWITCHES FIG. 8 WARMER SWITCHES FIG. 9 WARMER SWITCH WIRING SERVICE (cont.) Warmer Switch(es) OL: On/Off Brew Station & Upper RL: On/Off Brew Station If voltage is present as described, proceed to #4. If voltage is not present as described, refer to the Wir - ing Diagrams and check the brewer wiring harness. 4. Check the v ...
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Bunn RL00006929 - page 17
Page 17 SERVICE (cont.) Warmer Switch(es) RL: Left Rear , Left Front, Right Rear & Right Front FIG. 10 WARMER SWITCHES Location: These warmer switches are the two at the left and the left most one on the right of the base as viewed from the front, FIG. 10. Their knobs are marked Off/ On/Off/On. T o test these switches, access will also be neede ...
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Bunn RL00006929 - page 18
Page 18 FIG. 13 ST ART SWITCH - MODEL RL FIG. 12 ST ART SWITCH - MODEL OL FIG. 14 ST ART SWITCH WIRING SERVICE (cont.) Start Switch Location: The start switch is located in the base, below and to the right of the brew station, FIG.s 12 & 13. T est Procedure: 1. Disconnect the brewer from the power source and remove the wires from both terminals ...
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Bunn RL00006929 - page 19
Page 19 FIG. 17 INDICA TOR LAMP WIRING FIG. 15 INDICA TOR LAMPS - MODEL OL FIG. 16 INDICA TOR LAMP - MODEL RL 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 ...
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Bunn RL00006929 - page 20
Page 20 FIG. 18 LIMIT THERMOST A T FIG. 19 LIMIT THERMOST A T WIRING SERVICE (cont.) Limit Thermostat 4. Check for continuity across the 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 ...
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Bunn RL00006929 - page 21
Page 21 FIG. 20 SOLENOID V AL VE FIG. 21 SOLENOID V AL VE WIRING SERVICE (cont.) Solenoid Valve 4. Check the solenoid valve for coil action. Connect the brewer to the power sour ce, place the On/Off brew station warmer switch in the upper posi- tion, press and release the start switch. Listen carefully in the vicinity of the solenoid valve for a ? ...
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Bunn RL00006929 - page 22
Page 22 SERVICE (cont.) Relay FIG. 22 RELA Y P1478 Location: The relay is located under the top cover or top warmer housing, FIG. 22. T est Procedure: 1. Disconnect the plug terminal from the relay to the main wiring harness. Check the voltage across the pins of the black wire (P3) and white wire (P2) on the main harness with a voltmeter when the O ...
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Bunn RL00006929 - page 23
Page 23 FIG. 23 T ANK HEA TER FIG. 24 T ANK HEA TER WIRING SERVICE (cont.) T ank Heater Removal and Replacement: 1. Disconnect the brewer from the power source. 2. Remove the top cover or top warmer housing and the rear access panel. 3. Disconnect the wires to the tank heater . 4. Gently pull the thermostat bulb with grommet out of the tank lid. 5. ...
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Bunn RL00006929 - page 24
Page 24 SERVICE (cont.) Water Level and Overflow Safety Switch FIG. 25 WA TER LEVEL and OVERFLOW SAFETY SWITCHES P1478 Location: The water level and overflow safety switches are lo- cated under the top cover or top warmer housing and inside and front of the tank fill basin, FIG. 25. T est Procedure: 1. Disconnect the brewer from the power source ...
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Bunn RL00006929 - page 25
Page 25 FIG. 28 MASTER ON/OFF SWITCH - MODEL RL FIG. 27 MASTER ON/OFF SWITCH - MODEL OL P1712 P1713 FIG. 29 MASTER ON/OFF SWITCH WIRING Location: The Master ON/OFF switch is located in the base, at the left rear , FIG.s 27 & 28. T est Procedure: 1. Disconnect the brewer from the power source and remove the wires from all terminals of the Master ...
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Bunn RL00006929 - page 26
Page 26 WHI/VIO BREW SW BLK BLK BLU LIMIT THERMOS TAT SW . & THERMOS TAT BLK WHI BLK GREEN SCHEMA TIC WIRING DIAGRAM OL 35 BLK WHI P2 & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. 10007.0000E 01/07 © 1990 BUNN-O-MA TIC CORPORA TION 120/240 VO LT S AC 3 WIRE + GND SINGLE PHASE 60 HZ RED T ANK HEA TER BLK BLK BLK WHI P3 WHI P2 WHI " ...
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Bunn RL00006929 - page 27
Page 27 WHI/VIO BREW SW BLK BLK BLU LIMIT THERMOSTAT SW. & THERMOSTAT L1 BLK WHI BLK GRN/YEL SCHEMATIC WIRING DIAGRAM OLA L2 BLK RED 10651.0000C 10/98 © 1990 BUNN-O-MATIC CORPORATION 220-240 VOLTS AC 2 WIRE SINGLE PHASE 50-60 HZ RED TANK HEATER BLK BLK BLK RED P3 WHI P2 RED "KEEP WARM" HEATER WHI WHI WHI BLK SAFETY SW LEVEL SW PNK BL ...
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Bunn RL00006929 - page 28
Page 28 BREW SW BLK WHI BLK SCHEMATIC WIRING DIAGRAM OL25B BLK P2 & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. 100 VOLTS AC 2 WIRE SINGLE PHASE 50/60 HZ BLK BLK BLK P3 WHI WHI-12 WHI WHI-12 WHI WHI WHI WHI P2 WHI BLK LEVEL SW PNK BLU SOL K1 P3 P1 P2 BLK BLU WHI P3 P1 P2 BLU WHI K1 N.O. PNK PNK BLK PNK BLK BLK BLK BLU P1, P2, & P3 ARE P ...
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Bunn RL00006929 - page 29
Page 29 WHI/VIO BREW SW BLK BLK BLU LIMIT THERMOST AT BLK BLK GREEN SCHEMA TIC WIRING DIA GRAM OL35B BLK RED P2 & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. 10641.0000C 01/07 © 1994 BUNN-O-MA TIC CORPORA TION 200 VO L TS AC 2 WIRE + GND SINGLE PHASE 60 HZ RED TA NK HEA TER BLK BLK BLK P3 P2 RED WHI BLK SAFETY SW LEVEL SW PNK BLU SOL K1 P3 ...
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Bunn RL00006929 - page 30
Page 30 BLU LIMIT THERMOS TAT SW . & THERMOS TAT T ANK HEA TER BLK BLK BLK 32424.0000B 01/07 © 2007 BUNN-O-MA TIC CORPORA TION GRN SCHEMA TIC WIRING DIAGRAM RL RED WHI BLK BLK WHI BLK BLK WHI BLK BLK LEFT FRONT WARMER RIGHT FRONT WARMER LEFT REAR WARMER WHI 120/240 VO LT S AC 3 WIRE + GND SINGLE PHASE 60 HZ WHI/VIO BREW SW BLK BLK BLK WHI WHI ...
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Bunn RL00006929 - page 31
Page 31 LIMIT THERMOSTAT BLU BLK BLK 32422.0000A 10/99 © 1999 BUNN-O-MATIC CORPORATION GRN/YEL SCHEMATIC WIRING DIAGRAM RLA L2 L1 RED 220-240 VOLTS AC 2 WIRE SINGLE PHASE BLK BLK RED RED WHI WHI TANK HEATER "KEEP WARM" HEATER INDICATOR SW. & THERMOSTAT BREW STATION WARMER BLK BLK PNK BR. RECT VIO WHI/VIO SOL BLK WHI OPTIONAL LOW WATE ...
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Bunn RL00006929 - page 32
Page 32 SCHEMATIC WIRING DIAGRAM RL35B WHI/VIO SOL BLK WHI VIO BR. RECT OPTIONAL LOW WATER PRESSURE VALVE BLU LIMIT THERMOSTAT BLK L1 BLK 32421.0000A 10/99 © 1999 BUNN-O-MATIC CORPORATION GREEN L2 RED RED BLK BLK RED BLK BLK RED BLK BLK 200 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ BREW SW BLK BLK BLK RED RED WHI BLK SAFETY SW LEVEL SW PNK BLU SOL K1 P3 ...
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