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.
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.
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.
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...
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.
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.
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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.
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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...
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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.
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.
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.
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.
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.
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)
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.
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.
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 &...
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.
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.
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.
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”...
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"...
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.
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