1. DL manuals
  2. Bunn
  3. Coffee Maker
  4. OL
  5. Installation & Operating Manual

Bunn OL Installation & Operating Manual

Summary of OL

  • Page 1

    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 to ensure you have the latest revision of the operating manual, or to view the illustrated parts catalog, programming ...

  • Page 2

    Page 2 32430 030912 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 digi...

  • Page 3: Warning

    Page 3 00656.0001 contents introduction ................................................................2 user notices ...............................................................3 electrical requirements ..............................................4 plumbing requirements .........................

  • 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 ...

  • 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 9...

  • 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 a...

  • Page 7

    Page 7 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 ...

  • 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 warme...

  • 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...

  • 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...

  • 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 cautio...

  • 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. Type of paper filters 2. Coffee 3. Sprayhead 4. Funnel loading 5. Water temperature 1. Solenoid valve 2. Plumbing lines 3. Water supply ...

  • Page 13

    Page 13 fig. 1 access panels 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 - disconnect the bre...

  • Page 14

    Page 14 fig. 2 control thermostat fig. 3 thermostat wiring service (cont.) 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...

  • 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 inclu...

  • 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 ch...

  • 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. To te...

  • Page 18

    Page 18 fig. 13 start switch - model rl fig. 12 start switch - model ol fig. 14 start 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. Test procedure: 1. Disconnect the brewer from the power sourc...

  • Page 19

    Page 19 fig. 17 indicator lamp wiring fig. 15 indicator lamps - model ol fig. 16 indicator 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 indicat...

  • Page 20

    Page 20 fig. 18 limit thermostat fig. 19 limit thermostat 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...

  • Page 21

    Page 21 fig. 20 solenoid valve fig. 21 solenoid valve wiring service (cont.) solenoid valve 4. Check the solenoid valve for coil action. Connect the brewer to the power source, place the on/off brew station warmer switch in the upper posi- tion, press and release the start switch. Listen carefully i...

  • Page 22

    Page 22 service (cont.) relay fig. 22 relay p1478 location: the relay is located under the top cover or top warmer housing, fig. 22. Test 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)...

  • Page 23

    Page 23 fig. 23 tank heater fig. 24 tank heater wiring service (cont.) tank 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 thermost...

  • Page 24

    Page 24 service (cont.) water level and overflow safety switch fig. 25 water 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. Test procedure: 1...

  • 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. Test procedure: 1. Disconnect the brewer from the power source and remov...

  • Page 26

    Page 26 whi/vio brew sw blk blk blu limit thermostat sw. & thermostat blk whi blk green schematic wiring diagram ol 35 blk whi p2 & p3 are pins of a polarized three-pin connector. 10007.0000e 01/07 © 1990 bunn-o-matic corporation 120/240 volts ac 3 wire + gnd single phase 60 hz red tank heater blk b...

  • 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 wh...

  • 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 ...

  • Page 29

    Page 29 whi/vio brew sw blk blk blu limit thermostat blk blk green schematic wiring diagram ol35b blk red p2 & p3 are pins of a polarized three-pin connector. 10641.0000c 01/07 © 1994 bunn-o-matic corporation 200 volts ac 2 wire + gnd single phase 60 hz red tank heater blk blk blk p3 p2 red whi blk ...

  • Page 30

    Page 30 blu limit thermostat sw. & thermostat tank heater blk blk blk 32424.0000b 01/07 © 2007 bunn-o-matic corporation grn schematic 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 volts ac 3 wire + gnd single phase 60 hz w...

  • 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 wh...

  • 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 ...