Bunn OL Operating & Service Manual
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Bunn OL Operating & Service Manual

Bunn OL Operating & Service Manual

Bunn ol: user guide
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BUNN
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
10020.0000F 3/00 © 1989 BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
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  • Page 1 BUNN OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION PHONE: (217) 529-6601 FAX: (217) 529-6644 10020.0000F 3/00 © 1989 BUNN-O-MATIC CORPORATION ® POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 OL & RL M ER W AR H HE HI G S AW...

  • Page 2: Table Of Contents

    This equipment will brew a half-gallon batch of coffee into an awaiting decanter at the press of a button. The OL has two and the RL has five warmers to keep the beverage at the right temperature, on the RL one of which is capable of heating water to boiling.

  • Page 3: User Notices

    BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831.0000F 3/98 © 1988 BUNN-O-MATIC CORPORATION This equipment is to be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc.

  • Page 4: Electrical Requirements

    25 feet from the 1/2" water supply line. A tight coil of copper tubing in the water line will facili- tate moving the brewer to clean the counter top. Bunn- O-Matic does not recommend the use of a saddle valve to install the brewer.

  • Page 5: Initial Setup

    PLUMBING REQUIREMENTS (Cont.) Plumbing Hook-Up Model OL15 has an attached water strainer, proceed to step 2. Models OL20, OL35, & RL35, proceed as follows: Remove the rear panel and bottom pan. Run the long piece of tubing from the strainer (supplied) under the brewer and attach it to the water inlet fitting on the bottom bracket.

  • Page 6: Operating Controls

    Glows whenever the On/Off brew station warmer switch is in the upper position showing that the warmer is on and that the automatic brew cycle can be started. C. Start Switch Starts a brew cycle when the On/Off brew station warmer switch is in the upper position. MODEL OL MODEL RL S AW T BO...

  • Page 7: Coffee Brewing

    COFFEE BREWING Start each brew cycle with an empty, clean, half-gallon decanter. Insert a BUNN® filter into the funnel. Pour the fresh coffee into the filter and level the bed of grounds by gently shaking. Slide the funnel into the funnel rails.

  • Page 8: Troubleshooting

    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.
  • Page 9 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.
  • Page 10 TROUBLESHOOTING (cont.) Problem Spitting or unusual steaming from sprayhead. Warmer plates too hot, solenoid coil smoking, or water in tank heats ex- cessively fast. Inconsistent beverage level in de- canter. Dripping from sprayhead. Probable Cause 1. Control Thermostat 2. Lime build-up CAUTION Tank and tank components should be delimed regularly depending on...
  • Page 11 Page 11 Remedy The brew cycle should be started only with an empty decanter under the funnel. BUNN® paper filters should be used for proper extraction. A sufficient quantity of fine or drip grind coffee should be used for proper extraction.

  • Page 12: Service

    Access is gained by removing the rear panel, FIG. 1 attached with two #8-32 slotted head screws. On the model OL, the upper warmer, switch, and associated indicator lamp are located on the remov- able top warmer housing, FIG. 1.

  • Page 13: Control Thermostat

    SERVICE (cont.) Control Thermostat FIG. 2 CONTROL THERMOSTAT Location: The control thermostat is located under the top cover or top warmer housing, FIG. 2. To test the control thermostat, access will also be needed to the tank heater located in the bottom of the tank assembly.

  • Page 14: Warmer(S) Ol

    S AN FIG. 5 WARMERS 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 ones on the right and left of the brew station, and the one above and to the left of the brew station as viewed from the front, FIG.

  • Page 15: Rl: Right Rear Three Heat

    SERVICE (cont.) Warmer RL: Right Rear Three Heat IN G R DR T BO T LIQ S FA E HA S AN FIG. 7 THREE HEAT WARMER Location: The three heat warmer is above and to the right of the brew station as viewed from the front, FIG.

  • Page 16: Warmer Switch(Es) Ol

    Push the new switch firmly into the opening. FIG. 11 WARMER SWITCH WIRING P1713 MODEL OL Upper BLK A BLK B OL On/Off Brew Station BLK A BLK B RL On/Off Brew Station BLK A BLK B Page 16 BLK (A) (see below)

  • Page 17: Rl: Left Rear, Left Front, & Right Front Rotary

    SERVICE (cont.) Warmer Switch(es) RL: Left Rear, Left Front, & Right Front IN G R DR T BO T LIQ S FA E HA S AN FIG. 12 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.

  • Page 18: Rl: Right Rear Three Heat Rotary

    SERVICE (cont.) Warmer Switch(es) Right Rear Three Heat Rotary IN G S AW T BO E HA S FA S AN FIG. 14 THREE HEAT WARMER SWITCH Location: This switch is the farthest on the right of the base as viewed from the front, FIG.

  • Page 19: Start Switch

    SERVICE (cont.) Start Switch FIG. 16 START SWITCH - MODEL OL IN G H HE R DR T BO T LIQ E HA S FA D FIR S AN FIG. 17 START SWITCH - MODEL RL Location: The start switch is located in the base, below and to the right of the brew station, FIG.s 16 &...

  • Page 20: Indicator Lamp(S)

    SERVICE (cont.) Indicator Lamp(s) FIG. 19 INDICATOR LAMPS - MODEL OL IN G R DR T BO T LIQ E HA S FA S AN FIG. 20 INDICATOR LAMP - MODEL RL Location: The indicator lamps are located beneath their associ- ated warmers, FIG.s 19 and 20.

  • Page 21: Limit Thermostat

    SERVICE (cont.) Limit Thermostat FIG. 22 LIMIT THERMOSTAT Location: The limit thermostat is located on the back of the tank assembly, FIG. 22. Test Procedure: Disconnect the brewer from the power source. Check voltage across the black wire from the limit thermostat and the white or red wire on the tank heater terminal.

  • Page 22: Solenoid Valve

    SERVICE (cont.) Solenoid Valve FIG. 24 SOLENOID VALVE Location: The solenoid valve is located under the top cover or top warmer housing, FIG. 24. Test Procedure: Check the voltage across the white and the black and blue wires with a voltmeter when the On/Off brew station warmer switch is in the upper posi- tion and the start switch is pressed to the lower position and released.

  • Page 23: Relay

    SERVICE (cont.) Relay FIG. 26 RELAY Location: The relay is located under the top cover or top warmer housing, FIG. 26. Test Procedure: 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 On/Off brew station warmer switch is in the upper “ON”...

  • Page 24: Tank Heater

    SERVICE (cont.) Tank Heater FIG. 27 TANK HEATER Location: The tank heater is located in the bottom of the tank assembly, FIG. 27. Test Procedure: Check the voltage across the black and white or red wires on the tank heater with a voltmeter when the control thermostat is turned "ON"...

  • Page 25: Over Flow Safety Switch

    SERVICE (cont.) Water Level and Overflow Safety Switch FIG. 29 WATER LEVEL and OVERFLOW SAFETY SWITCHES 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. 29. Test Procedure: Disconnect the brewer from the power source.

  • Page 26: Wiring Diagrams

    BREW STATION WARMER BREW SW SAFETY SW P1,P2 & P3 ARE PINS OF A POLARIZED THREE-PIN WHI/VIO 10007.0000D 10/98 © 1990 BUNN-O-MATIC CORPORATION Page 26 WHI (OL15 & 20) RED (OL35) P2 & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR.
  • Page 27 SCHEMATIC WIRING DIAGRAM OLA LIMIT THERMOSTAT LEVEL SW OPTIONAL LOW WATER PRESSURE VALVE BR. RECT 10651.0000B 10/98 © 1994 BUNN-O-MATIC CORPORATION GRN/YEL SW. & THERMOSTAT TANK HEATER "KEEP WARM" HEATER UPPER WARMER BREW STATION WARMER BREW SW SAFETY SW N.O.
  • Page 28 P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. 100 VOLTS AC 2 WIRE SINGLE PHASE 50/60 HZ 10639.0000C 10/98 © 1991 Bunn-O-Matic Corporation TANK HEATER BLK-12 WHI-12 K2 N.O HEATER INDICATOR SW. & THERMOSTAT BREW STATION WARMER...
  • Page 29 BREW STATION WARMER BREW SW SAFETY SW N.O. P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN WHI/VIO 10641.0000B 10/98 © 1994 BUNN-O-MATIC CORPORATION Page 29 P2 & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. CONNECTOR. 10020 111598...
  • Page 30 LEVEL SW K1 N.O. OPTIONAL LOW WATER PRESSURE VALVE BR. RECT 120/240 VOLTS AC 3 WIRE SINGLE PHASE 60 HZ 10006.0000D 10/98 © 1990 BUNN-O-MATIC CORPORATION SW. & THERMOSTAT TANK HEATER "KEEP WARM" HEATER BREW STATION WARMER BREW SW SAFETY SW P1, P2, &...
  • Page 31 BR. RECT WHI/VIO LEFT REAR WARMER HIGH 220-240 VOLTS AC 2 WIRE SINGLE PHASE 10652.0000B 10/98 © 1994 BUNN-O-MATIC CORPORATION GRN/YEL TANK HEATER "KEEP WARM" HEATER BREW STATION WARMER BREW SWITCH SAFETY SW P1, P2, & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR.
  • Page 32 THERMOSTAT LEVEL SW K1 N.O. 100 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ 10638.0000B 10/98 © 1991 Bunn-O-Matic Corporation READY INDICATOR TANK HEATER BREW STATION WARMER BREW SW SAFETY SW P1, P2, & P3 ARE PINS OF A LEFT REAR WARMER...
  • Page 33 OPTIONAL LOW WATER PRESSURE VALVE BR. RECT HIGH 200 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ 10640.0000B 10/98 © 1994 BUNN-O-MATIC CORPORATION READY INDICATOR TANK HEATER BREW STATION WARMER BREW SW SAFETY SW N.O. P1, P2, & P3 ARE PINS OF A...

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