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Bunn OL manual

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Table of contents for the manual

  • Page 1

    OL & RL 32430.0000B 7/00 © 1999 BUNN-O-MATIC CORPORATION BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 BU N N ® OPERA TING & SERVICE MANUAL C A U T IO N DISCARD DECANTER IF: . C R A C K E D . S C R A T C H E D . B O I L E D D R Y . H E A T E D W H E N E M P T Y [...]

  • Page 2

    Page 2 CONTENTS Introduction ............................................................... 2 User Notices .............................................................. 3 Electrical Requirements ............................................. 4 Plumbing Requirements ............................................ 4 Initial Set-Up .....................[...]

  • Page 3

    Page 3 00656.0000 Fill water tank before turning -on thermostat or connecting appliance to power source. Do not use near combustibles. Follow national/local electrical codes. Electrically ground the chassis. Use only on a properly protected circuit capable of the rated load. FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE, FIRE, OR SHOCK HAZARD READ THE E[...]

  • Page 4

    Page 4 B UN N O F F H I 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. NEUTRAL WHITE L1 BLACK 208 or 240V.A.C. 120V.A.C. 120V.A.C. L2 RED MODELS OL35 & [...]

  • Page 5

    Page 5 PLUMBING REQUIREMENTS (Cont.) Plumbing Hook-Up Model OL15 has an attached water strainer , proceed to step 2. Models OL20, OL35, & RL35, proceed as follows: 1. 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. Re[...]

  • Page 6

    Page 6 W AR NIN G ! H I G H H E A T W A R M E R D O N O T B O IL D E C A N T E R D R Y K E E P C O M B U S T I B L E S A W A Y F A I L U R E T O C O M P L Y R I S K S G L A S S F A I L U R E /H O T L IQ U I D B U R N S A N D F I R E H A Z A R D CAUTION DISCARD DECANTER IF: . C R A C K E D . S C R A T C H E D . B O I L E D D R Y . H E A T E D W H E [...]

  • Page 7

    Page 7 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[...]

  • Page 8

    Page 8 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 cir cuit breaker/fuse. Check plumbing [...]

  • Page 9

    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. On/Off Brew Station W[...]

  • Page 10

    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 T ank and tank components should be delimed r[...]

  • Page 11

    Page 11 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 temperatur e 1. Solenoid Valve 2. Plumbing lines 3. Water supply Remedy The brew cycle should be started only wi[...]

  • Page 12

    Page 12[...]

  • Page 13

    Page 13 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 Pr ocedure: 1. Disconnect t[...]

  • Page 14

    Page 14[...]

  • Page 15

    Page 15[...]

  • Page 16

    Page 16 SERVICE (cont.) Warmer Switch(es) RL: Left Rear , Left Front, Right Rear & Right Front WARNING ! H I G H H E A T W A R M E R DO NO T B O I L DEC AN TER D R Y K EE P C O M B UST IBL ES A WAY FAI L U RE T O C O M P L Y R IS K S G L A SS F AI L UR E/H O T LI Q UID B UR NS AND F IRE HA Z ARD CAUTION D I S C A R D D E C A N T E R I F : . C R[...]

  • Page 17

    Page 17 C A U T I O N D I S C A R D D E C A N T E R I F : . C R A C K E D . S C R A T C H E D . B O I L E D D R Y . H E A T E D W H E N E M P T Y . U S E D O N H I G H F L A M E . O R E X P O S E D E L E C T R I C E L E M E N T S F A I L U R E T O C O M P L Y R I S K S I N J U R Y P N : 6 5 8 1 9 8 5 B U N N - O - M A T I C C O R P O R A T I O N F [...]

  • Page 18

    Page 18 WARNING ! H IG H H E A T W A RM ER D O NOT BOIL D ECANTER DRY KEEP COMBUST IBLES AW AY FA IL U R E T O C O M P L Y RIS K S G L A S S F A IL UR E / HO T LIQ U ID BU R N S A N D F IR E H A Z AR D CAUTION D I S C A R D D E C A N T E R I F : . C R A C K E D . S C R A T C H E D . B O I L E D D R Y . H E A T E D W H E N E M P T Y . U S E D O N H [...]

  • Page 19

    Page 19 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[...]

  • Page 20

    Page 20 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. Con- nect the brewer to the power sour ce, place the On/Off brew station warmer switch in the upper position, press and release the start switch. Lis- ten carefully in the vicinity of the solenoid valve for a [...]

  • Page 21

    Page 21[...]

  • Page 22

    Page 22 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.[...]

  • Page 23

    Page 23 BU N N O F F H I[...]

  • Page 24

    Page 24 WHI/VIO BREW SW BLK BLK BLU LIMIT THERMOSTAT SW. & THERMOSTAT N L1 BLK WHI BLK GREEN SCHEMATIC WIRING DIAGRAM OL L2 BLK WHI P2 & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. 10007.0000D 10/98 © 1990 BUNN-O-MATIC CORPORATION 120 VOLTS AC 2 WIRE 120/240 VOLTS AC 3 WIRE SINGLE PHASE 60 HZ RED (OL35) WHI (OL15 & 20) TANK HEATER [...]

  • Page 25

    Page 25 WHI/VIO BREW SW BLK BLK BLU LIMIT THERMOSTAT SW. & THERMOSTAT L1 BLK BLK GRN/YEL SCHEMATIC WIRING DIAGRAM OLA L2 BLK RED 10651.0000B 10/98 © 1994 BUNN-O-MATIC CORPORATION 220 -240 VOLTS AC 2 WIRE SINGLE PHASE 50-60 HZ RED TANK HEATER BLK BLK BLK P3 P2 RED "KEEP WARM" HEATER WHI WHI WHI BLK SAFETY SW LEVEL SW PNK BLU SOL K1 P3[...]

  • Page 26

    Page 26 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[...]

  • Page 27

    Page 27 WHI/VIO BREW SW BLK BLK BLU LIMIT THERMOSTAT L1 BLK BLK GREEN SCHEMATIC WIRING DIAGRAM OL35B L2 BLK RED P2 & P3 ARE PINS OF A POLARIZED THREE-PIN CONNECTOR. 10641.0000B 10/98 © 1994 BUNN-O-MATIC CORPORATION 200 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ RED TANK HEATER BLK BLK BLK P3 P2 RED WHI BLK SAFETY SW LEVEL SW PNK BLU SOL K1 P3 P1 P2 RE[...]

  • Page 28

    Page 28 BLU LIMIT THERMOSTAT SW. & THERMOSTAT TANK HEATER N BLK L1 BLK 32424.0000A 10/99 © 1999 BUNN-O-MATIC CORPORATION GREEN SCHEMATIC WIRING DIAGRAM RL L2 RED WHI BLK BLK WHI BLK BLK WHI BLK BLK LEFT FRONT WARMER RIGHT FRONT WARMER LEFT REAR WARMER WHI 120/240 VOLTS AC 3 WIRE SINGLE PHASE 60 HZ WHI/VIO BREW SW BLK BLK BLK WHI WHI WHI BLK SA[...]

  • Page 29

    Page 29 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[...]

  • Page 30

    Page 30 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 [...]