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 Manual, or Service Manual, please visit the Bunn-O-Matic website, at
www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and
manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
32430.0000D 05/12 © 1999 BUNN-O-MATIC CORPORATION
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 digital)- 1 year parts and 1 year labor.
2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below:
a) Electronic circuit and/or control boards - parts and labor for 3 years.
b) Compressors on refrigeration equipment - 5 years parts and 1 year labor.
c) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis - parts
and labor for 4 years or 40,000 pounds of coffee, whichever comes first.
These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be
commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the
applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured
by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation,
improper maintenance or repair, non periodic cleaning and descaling, equipment failures related to poor water quality,
damage or casualty. In addition, the warranty does not apply to replacement of items subject to normal use including but
not limited to user replaceable parts such as seals and gaskets. This warranty is conditioned on the Buyer 1) giving BUNN
prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office
Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an
authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under
warranty.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make
modifications to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such
individuals, whether oral or written, do not constitute warranties and should not be relied upon.
If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the
applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair
is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for
the equipment.
THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS
EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION
AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.
In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of
use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities
or services, or any other special, incidental or consequential damages.
392, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, BrewWISE, BrewWIZARD, BUNN Espress, BUNN
Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with the stylized red line, BUNNlink, Bunn-OMatic,
Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design, Cool Froth, DBC, Dr. Brew stylized Dr. design,
Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet Juice, High Intensity, iMIX, Infusion Series, Intellisteam, My Café, Phase Brew, PowerLogic, Quality Beverage Equipment Worldwide, Respect Earth, Respect Earth with
the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com, Scale-Pro, Silver Series, Single, Smart Funnel,
Smart Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality in Beverage Equipment Worldwide, ThermoFresh,
Titan, trifecta, Velocity Brew, A Partner You Can Count On, Air Brew, Air Infusion, Beverage Bar Creator, Beverage Profit
Calculator, Brew better, not bitter., BUNNSource, Coffee At Its Best, Cyclonic Heating System, Daypart, Digital Brewer
Control, Nothing Brews Like a BUNN, Pouring Profits, Signature Series, Tea At Its Best, The Horizontal Red Line, Ultra are
either trademarks or registered trademarks of Bunn-O-Matic Corporation.
Page 2
32430 030912
CONTENTS
Introduction ................................................................2
User Notices ...............................................................3
Electrical Requirements ..............................................4
Plumbing Requirements .............................................4
Initial Set-Up ...............................................................5
Operating Controls ......................................................6
Coffee Brewing ............................................................7
Cleaning ......................................................................7
Troubleshooting ..........................................................8
Service ........................................................................12
Wiring Diagrams .........................................................26
INTRODUCTION
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. The brewer is only for indoor use on a sturdy counter or shelf.
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your protection.
All notices on the equipment should be kept in good condition. Replace any unreadable or damaged labels.
WARNING !
Fill water tank before turning - on -
thermostat or connecting appliance
to power source.
Use only on a properly protected
circuit capable of the rated load.
Electrically ground the chassis.
Follow national/local electrical codes.
Do not use near combustibles.
FAILURE TO COMPLY RISKS EQUIPMENT
DAMAGE, FIRE, OR SHOCK HAZARD
READ THE ENTIRE OPERATING MANUAL
BEFORE BUYING OR USING THIS PRODUCT
THIS APPLIANCE IS HEATED WHENEVER
CONNECTED TO A POWER SOURCE
00831.0000F 3/98 ©1998 BUNN-O-MATIC CORPORATION
00831.0000
As directed in the International Plumbing Code of the
International Code Council and the Food Code
Manual of the Food and Drug Administration (FDA),
this equipment must be installed with adequate
backflow prevention to comply with federal, state
and local codes. For models installed outside the
U.S.A., you must comply with the applicable Plumbing /Sanitation Code for your area.
PN: 00658.0000G 02/08 © 1985 BUNN-O-MATIC CORPORATION
00658.0000
To reduce the risk of electric shock,
do not remove or open cover.
No user-serviceable parts inside.
Authorized service personnel only.
Disconnect power before servicing.
00656.0001
Page 3
37881.0000
32430 051512
ELECTRICAL REQUIREMENTS
CAUTION - Do not connect the brewer to the power source until specified in Initial Set-Up.
L2 RED
200, 230 or
L1 BLACK
240V A.C.
MODELS OL15 & 20 require
2-wire, grounded service rated
120 volts ac, 15 or 20 amp respectively, single phase, 60 Hz.
MODELS OL35 & RL35 require
3-wire, grounded service rated
120/208 or 120/240 volts ac, 20
amp, single phase, 60 Hz.
CE REQUIREMENTS
• This appliance must be installed in locations where
it can be overseen by trained personnel.
• For proper operation, this appliance must be installed
where the temperature is between 5°C to 35°C.
• Appliance shall not be tilted more than 10° for safe
operation.
• An electrician must provide electrical service as specified in conformance with all local and national codes.
• This appliance must not be cleaned by water jet.
• This appliance is not intended for use by persons
(including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given instructions concerning use of this appliance by a person responsible
for its safety.
• Children should be supervised to ensure they do not
play with the appliance.
• If the power cord is ever damaged, it must be replaced
by the manufacturer or authorized service personnel
with a special cord available from the manufacturer
or its authorized service personnel in order to avoid
a hazard.
• Machine must not be immersed for cleaning.
MODELS OLA, RLA, OL35B &
RL35B require 2-wire, ground-
ed service rated 240 volts ac
or 200 volts ac, 20 amp single
phase, 50 Hz.
MODEL OL25B requires
2-wire, grounded service
rated 100 volts ac, 20 amp
single phase, 50 Hz.
Electrical Hook-Up
Model OL15 has an attached cordset.
Models OL20, OL35, & RL35, proceed as follows:
CAUTION – Improper electrical installation will damage
electronic components.
1. An electrician must provide electrical service as
specified.
2. Using a voltmeter, check the voltage and
color coding of each conductor at the electrical
source.
3. Remove the top panel and rotate the control
thermostat knob fully counterclockwise to the
“OFF” position and replace the panel.
4. Remove the rear panel, feed the cord through
the strain relief, and connect it to the terminal
block.
5. Connect the brewer to the power source and
verify the voltage at the terminal block before
proceeding. Replace the rear panel.
6. If plumbing is to be hooked-up later be sure the
brewer is disconnected from the power source.
If Plumbing has been hooked-up, the brewer is
ready for Initial Set-Up.
Page 4
32430 051512
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 fitting is 1/4” flare.
NOTE - Bunn-O-Matic recommends 1/4” copper tubing for installations of less than 25 feet and 3/8” for more
than 25 feet from the 1/2” water supply line. A tight coil of copper tubing in the water line will facilitate moving
the brewer to clean the counter top. Bunn-O-Matic does not recommend the use of a saddle valve to install the
brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.
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. Reinstall the bottom pan and rear panel.
2. Flush the water line and securely attach it to the
1/4” flare fitting on the strainer.
3. Turn on the water supply.
P1478
As directed in the International Plumbing Code of the International Code Council and the Food Code Manual
of the Food and Drug Administration (FDA), this equipment must be installed with adequate backflow prevention to comply with federal, state and local codes. For models installed outside the U.S.A., you must
comply with the applicable Plumbing /Sanitation Code for your area.
Page 5
32430 051512
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. Place a decanter containing a small amount of water on the warmer beneath the funnel.
5. Connect the brewer to the power source, place the On/Off brew station warmer switch the upper position,
and momentarily press the start switch. Water will begin flowing into the tank. When water stops flowing
into the tank, initiate a second and a third brew cycle. During this third brew cycle the tank will fill to its
capacity and the excess will flow from the sprayhead, out of the funnel, and into the decanter.
NOTE - The On/Off brew station warmer switch must be in the upper position to initiate and complete a brew cycle.
6. Place the On/Off brew station warmer switch in
the lower position.
7. Disconnect the brewer from the power source.
8. Remove the top panel.
9. Rotate the control thermostat knob fully clockwise to the “ON” position and replace the panel.
10. Connect the brewer to the power source and wait
approximately twenty minutes for the water in
the tank to heat to the proper temperature. Some
water will drip from the funnel during this time;
this is due to expansion and should not occur
thereafter.
11. Place an empty decanter under the funnel.
12. Place the On/Off brew station warmer switch in
the upper position and momentarily press the
start switch. Empty the decanter after water has
stopped flowing from the funnel.
13. Allow the water in the tank to reheat to the proper
temperature.
14. Place an empty decanter on the warmer and
press the start switch. Check the water volume
in the decanter after water has stopped flowing
from the funnel. It should be 64 ounces.
15. If not, disconnect the brewer from the power
source and remove the top panel.
16. Add or remove washers to the float on the level
switch as required. Adding washers increases the
volume, removing washers decreases it. Replace
the top panel, connect the brewer to the power
source, start, and measure another brew cycle.
17. Repeat steps 13-16 until 64 oz water volume is
achieved.
P1478
P1712
Page 6
32430 051512
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 been started will not stop the flow of water into the funnel until the tank syphons down to
its proper level.
NOTE - The On/Off brew station warmer switch must be in the upper position to initiate and complete a brew
cycle.
B. On/Off Brew Station Warmer Indicator Lamp
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
D E
A B C
P1712
D. Upper Warmer Switch
Placing the switch in the upper position supplies
power to the upper warmer. Placing the switch in the
lower position cuts power to the upper warmer.
E. Upper Warmer Indicator Lamp
Glows whenever the upper warmer switch is in
the upper position showing that the warmer is on.
F. Left Rear Warmer Rotary Switch
Rotating the knob to the “ON” position supplies
power to the left rear warmer. Rotating the knob to the
“OFF” position cuts power to the left rear warmer.
G. Left Front Warmer Rotary Switch
Rotating the knob to the “ON” position supplies
power to the left front warmer. Rotating the knob
to the “OFF” position cuts power to the left front
warmer.
H. Right Front Warmer Rotary Switch
Rotating the knob to the “ON” position supplies
power to the right front warmer. Rotating the knob
to the “OFF” position cuts power to the right front
warmer.
P1713
F G A B C H I
I. Right Rear Warmer Rotary Switch
Rotating the knob to the “ON” position supplies
power to the right rear warmer. Rotating the knob
to the “OFF” position cuts power to the right rear
warmer.
Page 7
32430 121699
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 press the start switch.
6. When brewing is completed, simply discard the grounds and filter.
CLEANING
1. The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all
surfaces on Bunn-O-Matic equipment.
2. Check and clean the sprayhead. The sprayhead holes must always remain open.
3. With the sprayhead removed, insert the deliming spring (provided) all the way into the sprayhead tube.
When inserted properly, no more than two inches of spring should be visible. Saw back and forth five or six
times.
NOTE - In hard water areas, this may need to be done daily. It will help prevent liming problems in the brewer
and takes less than a minute.
Page 8
32430 121699
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 qualied service personnel.
• All electric components have 120 volt ac voltage on their terminals. Shorting of terminals or the application of external
voltages may result in equipment failure.
• Intermittent operation of electronic equipment is unlikely. Component failure will normally be permanent. If an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.
• Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are energized
for more than ten minutes without a supply of water.
• The use of two wrenches is recommended whenever plumbing ttings are tightened or loosened. This will help to
avoid twists and kinks in the tubing.
• Make certain that all plumbing connections are sealed and electrical connections tight and isolated.
• This brewer is heated at all times unless disconnected from the power source. Keep away from combustibles.
WARNING
• Exercise extreme caution when servicing electrical equipment.
• Disconnect the brewer from the power source when servicing, except when electrical tests are specied.
• Follow recommended service procedures
• Replace all protective shields or safety notices
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 and shut-off
valves.
(A) Direction of flow arrow must be
pointing towards brewer.
(B) Remove the strainer and check
for obstructions. Clear or replace.
Refer to Service - Water Level Switch
and Overflow Safety Switch for testing procedures. See page 23.
Page 9
32430 121699
TROUBLESHOOTING (cont.)
Problem
Brew cycle will not start. (cont.)
Water flows into fill basin continuously (On/Off brew station warmer
switch “OFF”).
Water flows into fill basin continuously (On/Off brew station warmer
switch “ON”).
Probable Cause
4. On/Off Brew Station Warmer
Switch
5. Start Switch
6. Relay
7. Solenoid Valve
1. Solenoid Valve
1. Start Switch
Remedy
Refer to Service - On/Off Brew
Station Warmer Switch for testing
procedures. See page 15.
Refer to Service - Start Switch for
testing procedures. See page 17.
Refer to Service - Relay for testing
procedures. See page 21.
Refer to Service - Solenoid Valve for
testing procedures. See page 20.
Refer to Service - Solenoid Valve for
testing procedures. See page 20.
Refer to Service - Start Switch for
testing procedures. See page 17.
Water is not hot.
Decanter warmer is not hot.
1. Limit Thermostat
CAUTION
Do not eliminate or bypass limit
thermostat. Use only B.O.M. replacement part #29329.1000
2. Control Thermostat
3. Tank Heater
1. Warmer Switches
Refer to Service - Limit Thermostat
for testing procedures. See page
19.
Refer to Service - Control Thermostat for testing procedures. See
page 13.
Refer to Service - Tank Heater for
testing procedures. See page 22.
(A) The Warmer Switch(es) must be
in the “ON” position for the warmer
to operate.
(B) Refer to Service - Warmer
Switch(es) for testing procedures.
See pages 15 & 16.
2. Decanter Warmers
Page 10
Refer to Service - Warmers for testing procedures. See page 14.
32430 070700
TROUBLESHOOTING (cont.)
Problem
Spitting or unusual steaming from
sprayhead.
Warmer plates too hot, solenoid
coil smoking, or water in tank heats
excessively fast.
Probable Cause
1. Control Thermostat
2. Lime build-up
CAUTION
Tank and tank components should
be delimed regularly depending on
local water conditions. Excessive
mineral build-up on stainless steel
surfaces can initiate corrosive reactions resulting in serious leaks.
1. Brewer wired to wrong voltage
Remedy
Refer to Service - Control Thermostat for testing procedures. See
page 13.
Inspect the tank assembly for excessive lime deposits. Delime as
required.
Refer to Electrical Requirements Page 4.
Inconsistent beverage level in decanter.
Dripping from sprayhead.
1. Improper water pressure
2. Syphon system
1. Syphon system
2. Solenoid Valve
Check the operating water pressure
to the brewer. It must be between
20 and 90 psi.
Water should flow freely from the
sprayhead and then stop abruptly.
The brewer must be level from frontto-back to syphon properly.
Water should flow freely from the
sprayhead and then stop abruptly.
The brewer must be level from frontto-back to syphon properly.
Refer to Service - Solenoid Valve for
testing procedures. See page 20.
Page 11
32430 121699
TROUBLESHOOTING (cont.)
Problem
Beverage overflows decanter.
Weak beverage.
Probable Cause
1. Beverage left in decanter
1. Type of paper filters
2. Coffee
3. Sprayhead
4. Funnel loading
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.
B.O.M. sprayhead #01082.0000
should be used to properly wet the
bed of ground coffee in the funnel.
The BUNN® paper filter should be
centered in the funnel and the bed of
coffee leveled by gentle shaking.
Brewer is making unusual noises.
5. Water temperature
1. Solenoid Valve
2. Plumbing lines
3. Water supply
Place a funnel over an empty decanter on the warmer beneath the
sprayhead. Place the On/Off brew
station warmer switch in the upper
position, press the start switch,
and check the water temperature
immediately below the sprayhead
with an accurate thermometer. The
reading should not be less than 195°
F. Adjust the control thermostat
slightly clockwise to increase the
water temperature.
The nut on top of the solenoid valve
must be tight or it will vibrate during
operation.
Plumbing lines should not rest on
the counter top.
(A) The brewer must be connected
to a cold water line.
Page 12
(B) Water pressure to the brewer
must not be higher than 90 psi.
Install a regulator if necessary to
lower the working pressure to approximately 50 psi.
32430 121699
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 brewer from the power
source before the removal of any panel or the replacement of any component.
The control thermostat, solenoid valve and relay
are located under the top cover or top warmer housing, FIG. 1, attached with three #8-32 slotted-head
screws.
The base warmer(s), switch(es), indicator lamp,
start switch, tank “keep warm” heater and terminal
block are located in the base. Access is gained by
removing the rear panel, FIG. 1 attached with two
#8-32 slotted-head screws
The limit thermostat and tank heater are located
on the tank assembly. 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 removable
top warmer housing, FIG. 1.
WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified
service personnel. The brewer should be disconnected
from the power source when servicing, except when
electrical tests are required and the test procedure
specifically states to connect the brewer to the power
source.
Contents
Control Thermostat ............................................... 13
Warmer(s)
OL: Brew Station & Upper ..............................................14
RL: Left Rear, Left Front, Brew Station,
Right Rear & Right Front ............................................14
Warmer Switch(es)
OL: On/Off Brew Station & Upper ...................................15
RL: On/Off Brew Station .................................................15
RL: Left Rear, Left Front, Right Rear
& Right Front Rotary ..................................................16
Start Switch .......................................................... 17
Indicator Lamp(s) ................................................. 18
Limit Thermostat ................................................... 19
Solenoid Valve ......................................................20
Relay .................................................................... 21
Tank Heater ........................................................... 22
Over Flow Safety Switch ....................................... 23
Master ON/OFF Switch .......................................... 24
Wiring Schematics .............................................. 25
P1712
FIG. 1 ACCESS PANELS
Page 13
P1713
32430 010308
SERVICE (cont.)
Control Thermostat
FIG. 2 CONTROL THERMOSTAT
source. The indication must be as described in
step 2. Voltage must not be indicated across
these terminals when the thermostat is turned
“OFF” (fully counterclockwise).
5. Disconnect the brewer from the power source.
If voltage is present as described, the control thermostat is operating properly.
If voltage is not present as described, replace the
control thermostat.
Removal and Replacement:
1. Remove the top cover or top warmer housing
from the brewer to gain access.
2. Remove both wires from the control thermostat
terminals.
3. Remove the thermostat bulb by firmly pullingup on the capillary tube at the tank lid. This will
disengage the grommet from the tank lid.
4. Remove the two #8-32 screws holding the control
thermostat to the bracket.
5. Fasten the new control thermostat to the component bracket.
P1478
NOTE - Make sure that the capillary tube is away from
any electrical termination and is not kinked.
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.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Check the voltage across the blue wire on the
control thermostat and the white or red wire on
the tank heater with a voltmeter. Connect the
brewer to the power source. The indication must
be:
a) 120 volts ac for two wire 120 volt models.
b) 200 or 240 volts ac for two wire 200 volt or
240 volt models and three wire 120/240 volt
models.
c) 100 volts ac for two wire 100 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.
6. Slide the grommet to the red mark on the capillary
tube.
7. Insert the bulb through the hole in the tank lid
and press the grommet firmly and evenly so that
the groove in the grommet fits into the tank lid.
8. Carefully bend the capillary tube so that the tube
and bulb inside the tank are in a vertical position.
9. Refer to FIG. 3 when reconnecting the wires.
10. Readjust the control thermostat dial as required.
BLU to Limit Thermostat
BLK to Tank Heater
4. Check the voltage across the black wire terminal
of the control thermostat and the white or red
wire on the tank heater with a voltmeter when
the control thermostat is turned “ON” (fully
clockwise). Connect the brewer to the power
Page 14
P1098
FIG. 3 THERMOSTAT WIRING
32430 121699
SERVICE (cont.)
Warmer(s)
OL: Brew Station & Upper
RL: Left Rear, Left Front, Brew Station, Right Rear & Right
Front
P1712
FIG. 4 WARMERS
5. Check for continuity from the wire terminal of the
white or red wire to the splice or indicator lamp
using the chart below.
If continuity is present as described, proceed to #6.
If continuity is not present as described, refer to the
Wiring Diagrams and check the brewer wiring harness.
6. Check for continuity across the two terminals on
the warmer.
If continuity is present as described, the warmer is
operating properly.
If continuity is not present as described, replace the
warmer.
Removal and Replacement:
1. Remove the #4-40 slotted-head screws holding
the warmer to the brewer
2. Lift the warmer assembly from the brewer.
3. Disconnect both wires from the warmer.
4. Refer to FIG. 6 when reconnecting the wires.
5. Place the new warmer into the brewer and securely attach it using the #4-40 screws.
FIG. 5 WARMERS
P1713
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 and right of
the brew station as viewed from the front, FIG. 5.
Test Procedure:
1. Once the switch has been tested and switch failure
has been eliminated, proceed as follows.
2. Disconnect the brewer from the power source and
remove the #4-40 screws attaching the warmer
being tested.
3. Lift the warmer assembly from the brewer and
invert the warmer making the wire terminals accessible for testing.
4. Check for continuity from the switch to the black
wire at the warmer element.
If continuity is present as described, proceed to #5.
WHI or RED (see below)
BLK to Warmer Switch
FIG. 6 WARMER WIRING
MODEL
OL Upper WHI OR RED to Indicator Lamp
OL Brew Station WHI OR RED to Indicator Lamp
to Terminal Block
RL Left Rear WHI OR RED to Terminal Block
to Brew Station Warmer
RL Left Front WHI OR RED to Indicator Lamp
to Terminal Block
RL Brew Station WHI OR RED to Relay P2
to Left Rear Warmer
RL Right Front WHI OR RED to Right Rear Warmer
to Indicator Lamp
RL Right Rear WHI OR RED to Right Front Warmer
Page 15
P1692
32430 121699
SERVICE (cont.)
Warmer Switch(es)
OL: On/Off Brew Station & Upper
RL: On/Off Brew Station
FIG. 7 WARMER SWITCHES
P1712
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.
4. Check the voltage across the other switch terminal and the terminal on the indicator lamp
with white or red wires with a voltmeter when
the switch is in the upper position. Connect the
brewer to the power source. The indication must
be as described in step 2. Voltage must not be
present across these terminals in the lower position.
5. Disconnect the brewer from the power source.
If voltage is present as described the switch is operating properly.
If voltage is not present as described, replace the
switch.
Removal and Replacement:
1. Compress the clips inside the housing and gently
push the switch through the opening.
2. Remove the wires from the switch terminals.
3. Refer to FIG. 9 when reconnecting the wires.
4. Push the new switch firmly into the opening.
P1713
FIG. 8 WARMER SWITCHES
Location:
These switches are located beneath and to the
left of their associated warmers as viewed from the
front, FIG.s 7 and 8.
Test Procedure:
1. Locate the switch terminal with black wires that
do not go to the nearby indicator lamp.
2. Check the voltage across this terminal and the
terminal on the indicator lamp with white or red
wires with a voltmeter. Connect the brewer to
the power source. The indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 or 240 volts ac for two wire 200 volt or
240 volt models.
c) 100 volts ac for two wire 100 volt models.
3. Disconnect the brewer from the power source.
BLK (A) (see below)
BLK (B) (see below)
FIG. 9 WARMER SWITCH WIRING
MODEL
OL Upper BLK A to Warmer
to Indicator Lamp
BLK B to Harness P3
OL On/Off Brew Station
BLK A to Indicator Lamp
to Brew Station Warmer
to Level Switch
BLK B to Terminal Block
RL On/Off Brew Station
BLK A to Indicator Lamp
to Level Switch
to Brew Station Warmer
BLK B to Left Front Warmer Switch
to Right Front Warmer Switch
Page 16
P1697
32430 121699
SERVICE (cont.)
Warmer Switch(es)
RL: Left Rear, Left Front, Right Rear & Right Front
P1713
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 test these switches, access will also be needed
to the terminal block located in the rear of the brewer.
4. Disconnect the brewer from the power source.
If voltage is present as described, the switch is operating properly.
If voltage is not present as described, replace the
switch.
Removal and Replacement:
1. Remove the knob from the switch.
2. Loosen the 5/8” nut on the switch shaft and push
the switch through the opening.
3. Remove the wires from the switch terminals.
4. Refer to FIG. 11 when reconnecting the wires.
5. Securely mount the new switch onto the housing
and reinstall the knob.
L1
BLK (L1) (see below)
BLK (1) (see below)
Test Procedure:
1. Check the voltage across terminal L1 and the white
or red wire on the terminal block with a voltmeter.
Connect the brewer to the power source. The
indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 or 240 volts ac for two wire 200 volt or 240
volt models.
c) 100 volts ac for two wire 100 volt models.
2. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #3.
If voltage is not present as described, refer to the Wiring
Diagrams and check the brewer wiring harness.
3. Check the voltage across terminal 1 and the white
or red wire on the terminal block with a voltmeter
when the switch is in the “ON” position. Connect
the brewer to the power source. The indication
must be as described in step 1. Voltage must not
be present across these terminals in the “OFF”
positions.
Page 17
1
P1695
FIG. 11 WARMER SWITCH WIRING
MODEL
RL Left Rear BLK 1 to Warmer
BLK L1 to Left Front Warmer Switch
RL Left Front BLK 1 to Warmer
BLK L1 to Left Rear Warmer Switch
to Brew Station Warmer Switch
RL Right Front BLK 1 to Warmer
BLK L1 to Terminal Block
to Brew Station Warmer Switch
to Right Rear Warmer Switch
RL Right Rear BLK 1 to Warmer
BLK L1 to Right Front Warmer Switch
32430 121699
SERVICE (cont.)
Start Switch
FIG. 12 START SWITCH - MODEL OL
If continuity is present as described, reconnect the
wires, the switch is operating properly.
If continuity is not present as described, replace the
switch.
Removal and Replacement:
1. Remove all wires from the switch terminals.
2. Compress the clips inside the housing and gently
push the switch through the opening.
3. Push the new switch into the opening and spread
the clips to hold the switch captive in the housing.
4. Refer to FIG. 14 when reconnecting the wires.
P1712
P1713
FIG. 13 START SWITCH - MODEL RL
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 source
and remove the wires from both terminals of the
start switch.
2. Check for continuity across the two terminals on
the switch when it is held in the lower position.
Continuity must not be present across these
terminals in the upper position.
BLU to Relay P1
BLK to Relay P3
& Level Switch
P1697
FIG. 14 START SWITCH WIRING
Page 18
32430 121699
SERVICE (cont.)
Indicator Lamp(s)
FIG. 15 INDICATOR LAMPS - MODEL OL
P1712
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 the clips inside the housing and gently
push the indicator lamp through the opening.
2. Remove the wires from the indicator lamp terminals.
3. Refer to FIG. 17 when reconnecting the wires.
4. Push the new indicator lamp firmly into the
opening.
WHI or RED
(see below)
P1713
FIG. 16 INDICATOR LAMP - MODEL RL
Location:
The indicator lamps are located beneath their associated warmers, FIG.s 15 and 16.
Test Procedure:
1. Check continuity of the black wire from the switch
to the indicator lamp.
2. Check continuity of the white or red wire from
the indicator lamp to the terminal block.
If continuity is present, proceed to #3.
If continuity is not present, refer to Wiring Diagrams
and check brewer wiring harness.
BLK (see below)
P1694
FIG. 17 INDICATOR LAMP WIRING
MODEL
OL Upper BLK to Warmer Switch
WHI or RED to Warmer
to Harness P2
OL Lower BLK to On/Off Brew Station Warmer
Switch
WHI or RED to Relay P2
to Brew Station Warmer
RL BLK to On/Off Brew Station Warmer
Switch
WHI or RED to Right Front Warmer
to Left Front Warmer
3. Check for voltage across the indicator lamp terminals. Connect the brewer to the power source.
The indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models.
b) 200 or 240 volts ac for two wire 200 volt or
240 volt models.
c) 100 volts ac for two wire 100 volt models.
Page 19
32430 121699
SERVICE (cont.)
Limit Thermostat
FIG. 18 LIMIT THERMOSTAT
4. Check for continuity across the limit thermostat
terminals.
If continuity is present as described, the limit thermostat is operating properly.
If continuity is not present as described, replace the
limit thermostat.
Removal and Replacement:
1. Remove both wires from the limit thermostat
terminals.
2. Carefully slide the limit thermostat out from under
the retaining clip.
3. Carefully slide the new limit thermostat into the
retaining clip.
4. Refer to FIG. 19 when reconnecting the wires.
P1715
Location:
The limit thermostat is located on the back of the tank
assembly, FIG. 18.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Check voltage across the black wire from the limit
thermostat and the white or red wire on the tank
heater terminal. Connect the brewer to the power
source. The indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 200 or 240 volts ac for two wire 200 volt or
240 volt models and three wire 120/240 volt
models.
c) 100 volts ac for two wire 100 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.
BLK to Terminal Block
BLU to BLU Lead from
Control Thermostat
FIG. 19 LIMIT THERMOSTAT WIRING
P1984
Page 20
32430 070700
SERVICE (cont.)
Solenoid Valve
P1478
FIG. 20 SOLENOID VALVE
Location:
The solenoid valve is located under the top cover or
top warmer housing, FIG. 20.
Test Procedure:
1. 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 position and the start switch is pressed to the lower
position and released. Connect the brewer to the
power source. The indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models,
b) 200 or 240 volts ac for two wire 200 volt or
240 volt models,
c) 100 volts ac for two wire 100 volt models.
2. Disconnect the brewer from the power source.
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 position, press and release the start switch. Listen
carefully in the vicinity of the solenoid valve for a
“clicking” sound as the coil magnet attracts and
after the approximate setting of the level float
switch, repels the plunger.
5. Disconnect the brewer from the power source.
If the sound is heard as described and water will not
pass through the solenoid valve, there may be a blockage in the water line before or after the solenoid valve
or, the solenoid valve may require inspection for wear,
and removal of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.
Removal and Replacement:
1. Disconnect the brewer from the power source.
2. Turn off the water supply to the brewer.
3. Remove the top cover or top warmer housing to
gain access.
4. Disconnect all wires from the solenoid valve.
5. Disconnect the water lines to and from the solenoid valve.
6. Remove the two #8-32 screws which hold the
solenoid valve and mounting bracket to the
component bracket.
7. Lift out the solenoid valve and bracket. Remove
the bracket from the solenoid valve and save to
mount the new valve.
8. Securely install the new solenoid valve to the
mounting bracket with two #10-32 screws. Check
the direction of flow arrow on the valve. It must
be pointing toward the tank inlet tube.
9. Securely attach the valve and bracket to the component bracket using the two #8-32 screws.
10. Securely fasten the water lines to and from the
solenoid valve.
11. Refer to FIG. 21 when reconnecting the wires.
If voltage is present as described, proceed to #3.
If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.
3. Check for continuity across the solenoid valve
coil terminals.
If continuity is present as described, reconnect the
white and the black and blue wires and proceed to
#4.
If continuity is not present as described, replace the
solenoid valve.
Page 21
BLK to Relay
WHI to Relay
P1588
FIG. 21 SOLENOID VALVE WIRING
32430 121699
SERVICE (cont.)
Relay
5. Disconnect the plug terminal from the relay to the
solenoid jumper wire. Check the voltage across
the pins of the black wire (P3) and white wire
(P2) on the relay with a voltmeter when the On/
Off brew station warmer switch is in the upper
“ON” position. Connect the brewer to the power
source. The indication must be as described in
step 1.
6. Disconnect the brewer from the power source.
7. Check the voltage across the pins of the blue
wire (P1) and white wire (P2) on the relay with a
voltmeter when the On/Off brew station warmer
switch is in the upper “ON” position and the start
switch is pressed to the lower position and released. Connect the brewer to the power source.
The indication must be as described in step 1.
8. Disconnect the brewer from the power source.
P1478
FIG. 22 RELAY
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) on the main harness with a voltmeter when
the On/Off brew station warmer switch is in the
upper “ON” position. Connect the brewer to the
power source. The indication must be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models,
b) 200 or 240 volts ac for two wire 200 volt or
240 volt models,
c) 100 volts ac for two wire 100 volt models.
2. Disconnect the brewer from the power source.
3. Check the voltage across the pins of the blue wire
(P1) and white wire (P2) on the main harness
with a voltmeter when the On/Off brew station
warmer switch is in the upper “ON” position and
the start switch is pressed to the lower position and held. Connect the brewer to the power
source. The indication must be as described in
step 1.
4. Disconnect the brewer from the power source.
If voltage is present as described, the relay is operating properly.
If voltage is not present as described, remove and
replace the relay.
Removal and Replacement:
1. Disconnect the brewer from the power source.
2. Remove the top cover or top warmer housing.
3. Disconnect both plug terminals from the relay.
4. Remove the two #8-32 screws attaching the
relay and bracket assembly to the component
bracket.
5. Remove the #6-32 screw attaching the relay to
the bracket.
6. Securely attach the new relay to the bracket using
the #6-32 screw.
7. Attach the new relay and bracket assembly to
the component bracket using the two #8-32
screws.
8. Reconnect the relay wire terminals to their respective plugs in the main harness and the jumper
wire at the solenoid valve.
If voltage is present as described, reconnect relay plug
to harness and proceed to #5.
If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.
Page 22
32430 121699
SERVICE (cont.)
Tank Heater
P1715
FIG. 23 TANK HEATER
Location:
The tank heater is located in the bottom of the tank
assembly, FIG. 23.
Test Procedure:
1. 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” (fully
clockwise). Connect the brewer to the power
source. The indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 200 or 240 volts ac for two wire 200 volt or
240 volt models and three wire 120/240 volt
models.
c) 100 volts ac for two wire 100 volt models.
2. Disconnect the brewer from the power source.
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. Disconnect and remove the fill basin tube.
6. Remove the four #8-32 nuts and hold-down brackets attaching the tank lid to the tank assembly and
remove the tank lid and gasket.
7. Drain the water from the tank using a syphon or
similar device.
8. Remove the two nuts securing the tank heater
to the bottom of the tank and remove the tank
heater.
9. Install a new tank heater with new washers and
secure with two nuts. Nuts should be securely
tightened to insure a proper seal.
10. Install the tank lid and gasket using the four holddown brackets and #8-32 nuts.
11. Install the fill basin tube and tighten the nuts securely.
12. Slide the grommet to the red mark on the capillary
tube.
13. Carefully bend the capillary tube so that the tube
and bulb inside the tank are in a vertical position.
14. Insert the bulb through the hole in the tank lid and
press the grommet firmly and evenly so that the
groove in the grommet fits into the tank lid.
15. Refer to FIG. 24 when reconnecting the wires.
16. Refer to Initial Setup to refill the tank.
If voltage is present as described, proceed to #3.
If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.
3. Check for continuity across the terminals of the
tank heater.
If continuity is present as described, reconnect the
wires, the tank heater is operating properly.
If continuity is not present as described, replace the
tank heater.
NOTE - If the tank heater remains unable to heat,
remove and inspect the heater for cracks in the
sheath.
Page 23
WHI (Models OL15 & 20) to Terminal Block
RED (Models OL35 & RL35) to Terminal Block
BLK to Control Thermostat
FIG. 24 TANK HEATER WIRING
P1716
32430 121699
SERVICE (cont.)
Water Level and Overflow Safety Switch
P1478
FIG. 25 WATER LEVEL and OVERFLOW
SAFETY SWITCHES
Location:
The water level and overflow safety switches are located under the top cover or top warmer housing and
inside and front of the tank fill basin, FIG. 25.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the top cover or top warmer housing.
3. Remove the leads of the switch being tested from
the connection block mounted on the front of the
tank basin.
4. Check the voltage across each black lead of the
connection block and the white or red lead on
the solenoid coil with a voltmeter. Turn the ON/
OFF switch to the “ON” position and connect the
brewer to the power source. The indication must
be:
a) 120 volts ac for two wire 120 volt models and
three wire 120/240 volt models,
b) 200 or 240 volts ac for two wire 200 volt or
240 volt models,
c) 100 volts ac for two wire 100 volt models.
5. Disconnect the brewer from the power source.
If continuity is present as described, reconnect the
wires as shown in FIG. 30, the switches are operating
properly.
If continuity is not present as described, replace the
failed switch.
Removal and Replacement:
1. Disconnect the brewer from the power source.
2. Remove the top cover or top warmer housing.
3. Remove the wire leads connecting the water level
and overflow switches to the terminal block at the
front of the tank and fill basin.
4. Disconnect the #8-32 screw and remove the
entire switch assembly from the tank and fill
basin.
5. Place the new switch assembly into the bracket,
wires up.
NOTE- The magnets must be at the top of the float and
there must be NO adjusting washers installed for the
overflow safety switch to operate properly.
6. Install the nuts over the wires and secure the
switch to the mounting bracket. Do not over
tighten.
7. Attach the entire switch assembly to the tank and
fill basin using the #8-32 screw.
8. Add or remove washers to the float on the level
switch as required. Adding washers increases the
volume, removing washers decreases it.
9. Refer to FIG. 26 and the relative wiring diagram
when reconnecting wires.
to BLK on Start Switch
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring harness.
6. Check for continuity across the overflow switch
pink wires only until the plastic float is raised
and check that continuity returns when the float
is lowered again.
7. Check for continuity across the water level switch
pink wires only until the plastic float is raised and
check that continuity returns when the float is
lowered again.
Page 24
to BLK on Brew Station
Warmer Switch
P1478
FIG. 26 WATER LEVEL and OVERFLOW
SAFETY SWITCH WIRING
32430 121699
SERVICE (cont.)
Master ON/OFF Switch
P1712
2. Check for continuity across the two terminals on
the switch at L1 BLK and BLK to Main Harness
when it is held in the lower position, Fig. 29.
Check for continuity across the two terminals on
the switch at L2 RED and RED to Main Harness
when it is held in the lower position.
Continuity must not be present across these
terminals in the upper position.
If continuity is present as described, reconnect the
wires, the switch is operating properly.
If continuity is not present as described, replace the
switch.
FIG. 27 MASTER ON/OFF SWITCH - MODEL OL
P1713
FIG. 28 MASTER ON/OFF SWITCH - MODEL RL
Location:
The Master ON/OFF switch is located in the base, at
the left rear, FIG.s 27 & 28.
Removal and Replacement:
1. Remove all wires from the switch terminals.
2. Remove the two screws from the outside of the
base and gently push the switch through the
opening.
3. Locate the new switch into the opening and secure with screws removed in step 2.
4. Refer to FIG. 29 when reconnecting the wires.
Incoming Power Supply
L1 - BLK
L2 - RED
Main Wiring harness
BLK
RED
P3955
Test Procedure:
1. Disconnect the brewer from the power source
and remove the wires from all terminals of the
Master ON/OFF switch.
Page 25
FIG. 29 MASTER ON/OFF SWITCH WIRING
32430 010308
SCHEMATIC WIRING DIAGRAM
L1
L2
N
OL 35
LIMIT
BLK
THERMOSTAT
WHI
BLU
BLK
P3
BLK BLK
BLK
BLK
BLK
SW. &
THERMOSTAT
"KEEP WARM" HEATER
WHI
UPPER WARMER
BREW STATION WARMER
SAFETY SWLEVEL SW
PNK
PNKPNKBLK PNK BLK
BLK
TANK HEATER
BREW SW
GREEN
MAIN ON/OFF SWITCH
(Late Models only)
BLK
P2 & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
WHI
P2
BLK
WHI
WHI
WHI
WHI
RED
RED
BLK
P3
BLK
P1P2BLU
BLU
SOL
WHI
WHI
OPTIONAL LOW WATER PRESSURE VALVE
WHI VIO
BLK
120/240 VOLTS AC
3 WIRE + GND
SINGLE PHASE
60 HZ
P3
P2 WHI
P1
BLK
BLU
K1 N.O.
K1
BLK
BLU
WHI
P1,P2 & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
BR. RECT
WHI/VIO
SOL
10007.0000E 01/07 © 1990 BUNN-O-MATIC CORPORATION
Page 26
32430 010308
L1
SCHEMATIC WIRING DIAGRAM OLA
BLK
LIMIT
THERMOSTAT
BLU
SW. &
THERMOSTAT
BLK
GRN/YEL
TANK HEATER
L2
RED
WHI
"KEEP WARM" HEATER
BLK
P3
BLK BLK
BLK
BLK
BLK
PNK
K1 N.O.
K1
SOL
PNKBLK PNK BLK
BLK
P3
BLK
BLU
P1
BLU
WHI
P2
WHI
OPTIONAL LOW WATER PRESSURE VALVE
WHI
UPPER WARMER
BREW STATION WARMER
SAFETY SWLEVEL SW
PNK
BLK
BLU
WHI
P3
P2 RED
P1
BLK
BLU
WHI
BREW SW
P1,P2 & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
P2
WHI
RED
RED
RED
WHI VIO
BR. RECT
BLK
WHI/VIO
10651.0000C 10/98 © 1990 BUNN-O-MATIC CORPORATION
SOL
220-240 VOLTS AC
2 WIRE
SINGLE PHASE
50-60 HZ
Page 27
32430 121699
SCHEMATIC WIRING DIAGRAM OL25B
L1
GRN/YEL
N
BLK-12BLK-12
T1 L1
K2 N.O
LIMIT
BLK
SOL
BLK
BLK
BLK
BLU
WHI
THERMOSTAT
PNK
BLK
P3
BLU
P1
P2
WHI
SW. & THERMOSTAT
BLU
BLK
LEVEL SW
PNK
K1 N.O.
K1
TANK HEATER
HEATER INDICATOR
BLK
BLK
BREW STATION WARMER
OVERFLOW
PROTECTION SW
PNK
BLK
BLU
WHI
PNK BLK
P3
P1
P2
WHI-12
BLK
BLU
L2 T2
K2 N.O
K2
BREW SW
WHI-12
WHI
WHI
WHI
WHI
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
BLK
P3
BLK BLK
100 VOLTS AC
2 WIRE
SINGLE PHASE
50/60 HZ
10639.0000C 10/98 © 1991 Bunn-O-Matic Corporation
WHI
UPPER WARMER
P2 & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
WHI
P2
WHI
Page 28
32430 121699
SCHEMATIC WIRING DIAGRAM
L1
L2
OL35B
READY INDICATOR
BLU
LIMIT
BLK
THERMOSTAT
BLU
SW
P3 P2
BLK BLK
SW
BLK
BLK
BLK
PNK
BLK PNK
SW. & THERMOSTAT
IND
BLK
IND
LEVEL SW
PNK
BLK
WHI
UPPER WARMER
BREW STATION WARMER
SAFETY SW
PNK
BLK
MAIN ON/OFF SWITCH
GREEN
TANK HEATER
P2 & P3 ARE PINS OF A
POLARIZED THREE-PIN
BREW SW
BLK
(Late Models only)
CONNECTOR.
WHI
BLK
BLK
RED
RED
RED
RED
RED
RED
P3
P1
P2
BLK
BLU
WHI
SOL
BLK
BLU
WHI
OPTIONAL LOW WATER PRESSURE VALVE
200 VOLTS AC
2 WIRE + GND
SINGLE PHASE
60 HZ
BLK
K1 N.O.
K1
WHI VIO
BR. RECT
BLK
10641.0000C 01/07 © 1994 BUNN-O-MATIC CORPORATION
BLU
WHI
WHI/VIO
P3
P1
P2
SOL
BLK
BLU
RED
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
Page 29
32430 121699
SCHEMATIC WIRING DIAGRAM RL
L1
L2
N
SW. &
LIMIT
THERMOSTAT
BLU
BLK
BLK
SOL
BLK
BLU
WHI
OPTIONAL LOW WATER PRESSURE VALVE
BLK
P3
BLK
P1P2BLU
WHI
WHI VIO
BLK
PNK
K1 N.O.
K1
BR. RECT
THERMOSTAT
"KEEP WARM" HEATER
BREW STATION WARMER
SAFETY SWLEVEL SW
PNKPNKBLK PNK BLK
WHI
P3
P1
P2 WHI
SOL
BLK
BLU
WHI/VIO
BLKBLK
TANK HEATER
BLK
BLU
GRN
MAIN ON/OFF SWITCH
(Late Models only)
BLK
BREW SW
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
BLK
RED
RED
WHI
WHIWHI
WHI
WHI
L1 1
BLK
ON
OFF
L1 1
ON
OFF
OFF
OFF
ON
OFF
L1 1
ON
OFF
ON
120/240 VOLTS AC
ON
OFF
L1 1
ON
ON
OFF
3 WIRE + GND
SINGLE PHASE
60 HZ
WHIBLK BLK
LEFT REAR WARMER
WHIBLK BLK
LEFT FRONT WARMER
WHIBLK BLK
RIGHT FRONT WARMER
BLK
RIGHT REAR WARMER
32424.0000B 01/07 © 2007 BUNN-O-MATIC CORPORATION
WHI
Page 30
32430 010308
LIMIT
THERMOSTAT
BLU BLKBLK
32422.0000A 10/99 © 1999 BUNN-O-MATIC CORPORATION
GRN/YEL
SCHEMATIC WIRING DIAGRAM RLA
L2L1
RED
220-240 VOLTS AC
2 WIRE
SINGLE PHASE
BLK
BLK
RED
RED
WHIWHI
TANK HEATER
"KEEP WARM" HEATER
INDICATOR
SW. &
THERMOSTAT
BREW STATION WARMER
BLK
BLKPNK
BR. RECT
VIO
WHI/VIO
SOL
BLK
WHI
OPTIONAL LOW WATER PRESSURE VALVE
WHI
BLK
SAFETY SWLEVEL SW
PNK
BLU
SOL
K1
P3
P1
P2
RED
BLK
BLU
WHI
P3
P1
P2
BLU
WHI
K1 N.O.
PNKBLK PNK
BLK
BLK
BLU
BREW SWITCH
RED
BLK
RED
BLK
RED
BLK
LEFT REAR WARMER
OFF
ON
OFF
ON
L1 1
BLK
LEFT FRONT WARMER
OFF
ON
OFF
ON
L1 1
BLK
RIGHT FRONT WARMER
OFF
ON
OFF
ON
L1 1
BLK
RED
BLK
RIGHT REAR WARMER
OFF
ON
OFF
ON
L1 1
BLK
P1, P2, & P3 ARE PINS OF
A POLARIZED THREE-PIN
CONNECTOR.
Page 31
32430 121699
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
REDBLK BLK
REDBLK BLK
REDBLK BLK
200 VOLTS AC
2 WIRE
SINGLE PHASE
60 HZ
BREW SW
BLK
BLK
BLK
RED
RED
WHI
BLK
SAFETY SWLEVEL SW
PNK
BLU
SOL
K1
P3
P1
P2
RED
BLK
BLU
WHI
P3
P1
P2
BLU
WHI
K1 N.O.
PNK
PNKBLK PNK BLK
BLK
BLK
BLU
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
TANK HEATER
BREW STATION WARMER
BLU
READY INDICATOR
BLK
SW. & THERMOSTAT
LEFT REAR WARMER
LEFT FRONT WARMER
RIGHT FRONT WARMER
IND
OFF
ON
OFF
ON
L1 1
OFF
ON
OFF
ON
L1 1
OFF
ON
OFF
ON
L1 1
REDBLK BLK
RIGHT REAR WARMER
OFF
ON
OFF
ON
L1 1
Page 32
32430 121699
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