OL & RL
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION OF CANADA
280 INDUSTRIAL PKWY. S.,
AURORA, ONT., L4G3T9
PHONE: (905) 841-2866 FAX: (905) 841-2775
To ensure you have the latest revision of the manual or to obtain the illustrated parts catalog, 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. Contact Bunn-O-Matic
Corporation at 1-800-863-2256 to obtain a paper copy of the required Illustrated Parts Catalog mailed via Canadian Postal Service.
32430.7000C 04/09 © 1999 BUNN-O-MATIC CORPORATION
www.bunnomatic.com
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Bunn-O-Matic Corporation of Canada (“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 labour.
2) All other equipment - 2 years parts and 1 year labour plus added warranties as specified below:
a) Electronic circuit and/or control boards - parts and labour for 3 years.
b) Compressors on refrigeration equipment - 5 years parts and 1 year labour.
c) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve
analysis - parts and labour 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 judgement, 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 (905) 841-2866 or by writing to 280 Industrial Parkway South, Aurora, Ontario, L4G
3T9. 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, CONDITION,
WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY
OF EITHER MERCHANTABILITY, MERCHANTABLE QUALITY 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 defective equipment is covered by warranty, Bunn, at its
exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts
and/or labour (during the applicable parts and labour 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, consequential or punitive damages.
RETURN POLICY
CONTACT PLANT FOR RETURN MATERIAL AUTHORIZATION. ALL RETURNS MUST
BE AUTHORIZED BY BUNN-O-MATIC AND ARE SUBJECT TO A RETURN CHARGE.
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.
2
8/12
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
! AVERTISSEMENT
• FILL WATER TANK BEFORE PLUGGING IN UNIT OR
ENERGIZING THE THERMOSTAT.
• DO NOT OVERLOAD CIRCUIT.
• ALWAYS ELECTRICALLY GROUND THE CHASSIS.
• DO NOT DEFORM PLUG OR CORD.
• FOLLOW NATIONAL AND LOCAL ELECTRICAL CODES.
• KEEP COMBUSTIBLES AWAY.
FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE, FIRE OR
SHOCK HAZARD.
• REMPLIR LE RÉSERVOIR D'EAU AVANT DE BRANCHER
L'APPAREIL OU DE METTRE LE THERMOSTAT SOUS TENSION.
• NE PAS SURCHARGER LE CIRCUIT.
• TOUJOURS METTRE LE BOITIER À LA MASSE.
• NE PAS DÉFORMER LA FICHE OU LE CORDON.
• SE CONFORMER AUX CODES NATIONAL OU LOCAL
D'ÉLECTRICITÉ.
• GARDER LES PRODUITS COMBUSTIBLES À DISTANCE.
TOUT MANQUEMENT À SE CONFORMER À CES DIRECTIVES PEUT
ENTRAINER DES DOMMAGES À L'ÉQUIPMENT OU PRODUIRE DES
DANGERS D'INCENDIE OU D'ÉLECTROCUTION.
READ THE ENTIRE OPERATING MANUAL INCLUDING
THE LIMIT OF WARRANTY AND LIABILITY BEFORE
BUYING OR USING THIS PRODUCT.
VEUILLEZ LIRE LE MANUEL DE FONCTIONEMENT
EN ENTIER, Y COMPRIS LES LIMITES DE GARANTIES ET
RESPONSABILITÉS,AVANT D’ACHETER
OU D'UTILISER LE PRÉSENT PRODUIT.
THIS EQUIPMENT IS ENERGIZED AT ALL TIMES UNLESS
ELECTRICALLY DISCONNECTED.
L' ÉQUIPEMENT EST TOUJOURS SOUS TENSION
LORSQU'IL N'EST PAS DÉBRANCHÉ.
00831.0002J 8/98 © 1984 BUNN-O-MATIC CORPORATION
00831.0002
00658.7000
This equipment must be installed to comply with Canadian
Plumbing Codes and applicable health and safety regulations.
For models installed outside Canada, comply with the
applicable Plumbing /Sanitation Code.
Cet équipement doit être installé conformément au code
Canadien de plomberie et aux règlements de santé et de
sécurité qui s’ appliquent. Les modèles destinés à être
installés ailleurs qu’au Canada doivent respecter les codes de
plomberie et d’hygiène de la localité.
00656.7000
37881.7000
Artwork for P/N: 00656.7000
Artwork Rev: F
Drawn: RN
Date: 06/27/08
Page 3
32430 010308
ELECTRICAL REQUIREMENTS
CAUTION - Do not connect the brewer to the power source until specified in Initial Set-Up.
L2 RED
L1 BLACK
MODELS OL15 & 20 require
2-wire, grounded service rated
120 volts ac, 15 or 20 amp respectively, single phase, 60 Hz.
200, 230 or
240V A.C.
MODELS OLA, RLA, OL35B &
RL35B require 2-wire, grounded service rated 240 volts ac
or 200 volts ac, 20 amp single
phase, 50 Hz.
MODELS OL35 & RL35 require
3-wire, grounded service rated
120/208 or 120/240 volts ac, 20
amp, single phase, 60 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.
2.
3.
4.
5.
6.
An electrician must provide electrical service as
specified.
Using a voltmeter, check the voltage and
color coding of each conductor at the electrical
source.
Remove the top panel and rotate the control
thermostat knob fully counterclockwise to the
“OFF” position and replace the panel.
Remove the rear panel, feed the cord through
the strain relief, and connect it to the terminal
block.
Connect the brewer to the power source and
verify the voltage at the terminal block before
proceeding. Replace the rear panel.
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.
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.
P1478
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-OMatic 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.
This equipment must be installed to comply with
the International Plumbing Code of the International
Code Council and the Food Code Manual of the Food
and Drug Administration (FDA). For models installed
outside the U.S., you must comply with the applicable
Plumbing/Sanitation Code for your area.
Page 4
32430 010308
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. 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.
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.
9. Rotate the control thermostat knob fully clockwise
2. Rotate the control thermostat knob fully counterto the “ON” position and replace the panel.
clockwise to the “OFF” position and replace the
10. Connect the brewer to the power source and wait
panel.
approximately twenty minutes for the water in the
3. Insert an empty funnel into the funnel rails.
tank to heat to the proper temperature. Some
4. Place a decanter containing a small amount of
water will drip from the funnel during this time;
water on the warmer beneath the funnel.
this is due to expansion and should not occur
5. Connect the brewer to the power source, place
thereafter.
the On/Off brew station warmer switch the up11. Place an empty decanter under the funnel.
per position, and momentarily press the start
12. Place the On/Off brew station warmer switch in
switch. Water will begin flowing into the tank.
the upper position and momentarily press the
When water stops flowing into the tank, initiate a
start switch. Empty the decanter after water has
second and a third brew cycle. During this third
stopped flowing from the funnel.
brew cycle the tank will fill to its capacity and the
13. Allow the water in the tank to reheat to the proper
excess will flow from the sprayhead, out of the
temperature.
funnel, and into the decanter.
14. Place an empty decanter on the warmer and press
the start switch. Check the water volume in the
NOTE - The On/Off brew station warmer switch must
decanter after water has stopped flowing from
be in the upper position to initiate and complete a
the funnel. It should be 64 ounces.
brew cycle.
15. If not, disconnect the brewer from the power
source and remove the top panel.
6. Place the On/Off brew station warmer switch in
16. Add or remove washers to the float on the level
the lower position.
switch as required. Adding washers increases the
7. Disconnect the brewer from the power source.
volume, removing washers decreases it. Replace
8. Remove the top panel.
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.
P1712
P1478
Page 5
32430 121699
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
D
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
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.
A
B
C
P1712
MODEL RL
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.
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.
P1713
F
G
A
B
C
H
I
Page 6
32430 121699
COFFEE BREWING
Start each brew cycle with an empty, clean, half-gallon decanter.
1.
2.
3.
4.
5.
6.
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.
Place the On/Off brew station warmer switch in the upper position.
Momentarily press the start switch.
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 7
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 qualified 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 fittings 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 specified.
Follow recommended service procedures
Replace all protective shields or safety notices
Problem
Probable Cause
Remedy
Equipment will not operate.
1. No power or incorrect voltage
(A) Connect the brewer to the power
source.
(B) Check the terminal block for the
proper voltages.
(C) Check circuit breaker/fuse.
Brew cycle will not start.
1. No water
Check plumbing and shut-off
valves.
2. Water Strainer
(A) Direction of flow arrow must be
pointing towards brewer.
(B) Remove the strainer and check
for obstructions. Clear or replace.
3. Water Level Switch and Overflow
Safety Switch
Page 8
Refer to Service - Water Level Switch
and Overflow Safety Switch for testing procedures. See page 23.
32430 121699
TROUBLESHOOTING (cont.)
Remedy
Problem
Probable Cause
Brew cycle will not start. (cont.)
4. On/Off Brew Station Warmer Refer to Service - On/Off Brew
Station Warmer Switch for testing
Switch
procedures. See page 15.
5. Start Switch
Refer to Service - Start Switch for
testing procedures. See page 17.
6. Relay
Refer to Service - Relay for testing
procedures. See page 21.
7. Solenoid Valve
Refer to Service - Solenoid Valve for
testing procedures. See page 20.
Water flows into fill basin continu- 1. Solenoid Valve
ously (On/Off brew station warmer
switch “OFF”).
Refer to Service - Solenoid Valve for
testing procedures. See page 20.
Water flows into fill basin continu- 1. Start Switch
ously (On/Off brew station warmer
switch “ON”).
Refer to Service - Start Switch for
testing procedures. See page 17.
Water is not hot.
Refer to Service - Limit Thermostat
for testing procedures. See page
19.
1. Limit Thermostat
CAUTION
Do not eliminate or bypass limit
thermostat. Use only B.O.M. replacement part #29329.1000
Decanter warmer is not hot.
2. Control Thermostat
Refer to Service - Control Thermostat for testing procedures. See
page 13.
3. Tank Heater
Refer to Service - Tank Heater for
testing procedures. See page 22.
1. Warmer Switches
(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 9
Refer to Service - Warmers for testing procedures. See page 14.
32430 070700
TROUBLESHOOTING (cont.)
Problem
Probable Cause
Spitting or unusual steaming from 1. Control Thermostat
sprayhead.
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.
Remedy
Refer to Service - Control Thermostat for testing procedures. See
page 13.
Inspect the tank assembly for excessive lime deposits. Delime as
required.
Warmer plates too hot, solenoid 1. Brewer wired to wrong voltage
coil smoking, or water in tank heats
excessively fast.
Refer to Electrical Requirements Page 4.
Inconsistent beverage level in de- 1. Improper water pressure
canter.
Check the operating water pressure
to the brewer. It must be between
20 and 90 psi.
Dripping from sprayhead.
2. Syphon system
Water should flow freely from the
sprayhead and then stop abruptly.
The brewer must be level from frontto-back to syphon properly.
1. Syphon system
Water should flow freely from the
sprayhead and then stop abruptly.
The brewer must be level from frontto-back to syphon properly.
2. Solenoid Valve
Refer to Service - Solenoid Valve for
testing procedures. See page 20.
Page 10
32430 121699
TROUBLESHOOTING (cont.)
Problem
Probable Cause
Remedy
Beverage overflows decanter.
1. Beverage left in decanter
The brew cycle should be started
only with an empty decanter under
the funnel.
Weak beverage.
1. Type of paper filters
BUNN® paper filters should be used
for proper extraction.
2. Coffee
A sufficient quantity of fine or drip
grind coffee should be used for
proper extraction.
3. Sprayhead
B.O.M. sprayhead #01082.0000
should be used to properly wet the
bed of ground coffee in the funnel.
4. Funnel loading
The BUNN® paper filter should be
centered in the funnel and the bed of
coffee leveled by gentle shaking.
5. Water temperature
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.
1. Solenoid Valve
The nut on top of the solenoid valve
must be tight or it will vibrate during
operation.
2. Plumbing lines
Plumbing lines should not rest on
the counter top.
3. Water supply
(A) The brewer must be connected
to a cold water line.
Brewer is making unusual noises.
Page 11
(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.
P1712
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
FIG. 1 ACCESS PANELS
Page 12
P1713
32430 010308
SERVICE (cont.)
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.
Control Thermostat
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
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.
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.
NOTE - Make sure that the capillary tube is away from
any electrical termination and is not kinked.
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
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 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 13
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
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.
FIG. 4 WARMERS
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.
P1712
WHI or RED (see below)
BLK to Warmer Switch
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.
P1692
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
to Right Front Warmer
Page 14
WHI OR RED
32430 121699
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 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.
P1712
FIG. 7 WARMER SWITCHES
BLK (A) (see below)
BLK (B) (see below)
P1713
P1697
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.
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
BLK B
to Indicator Lamp
to Brew Station Warmer
to Level Switch
to Terminal Block
RL On/Off Brew Station
BLK A
BLK B
to Indicator Lamp
to Level Switch
to Brew Station Warmer
to Left Front Warmer Switch
to Right Front Warmer Switch
Page 15
32430 121699
SERVICE (cont.)
4. Disconnect the brewer from the power source.
Warmer Switch(es)
RL: Left Rear, Left Front, Right Rear & Right Front
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.
FIG. 10 WARMER SWITCHES
P1713
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.
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.
L1
BLK (L1) (see below)
BLK (1) (see below)
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
BLK L1
RL Right Rear
Page 16
to Warmer
to Terminal Block
to Brew Station Warmer Switch
to Right Rear Warmer Switch
BLK 1 to Warmer
BLK L1 to Right Front Warmer Switch
32430 121699
SERVICE (cont.)
If continuity is present as described, reconnect the
wires, the switch is operating properly.
If continuity is not present as described, replace the
switch.
Start 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
FIG. 12 START SWITCH - MODEL OL
BLU to Relay P1
BLK to Relay P3
& Level Switch
P1697
FIG. 14 START SWITCH WIRING
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.
Page 17
32430 121699
SERVICE (cont.)
4. Disconnect the brewer from the power source.
Indicator Lamp(s)
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.
P1712
FIG. 15 INDICATOR LAMPS - MODEL OL
WHI or RED
(see below)
BLK (see below)
P1694
FIG. 17 INDICATOR LAMP WIRING
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.
MODEL
OL Upper BLK
WHI or RED
to Warmer Switch
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 18
32430 121699
SERVICE (cont.)
4. Check for continuity across the limit thermostat
terminals.
Limit Thermostat
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.
FIG. 18 LIMIT THERMOSTAT
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.
BLK to Terminal Block
BLU to BLU Lead from
Control Thermostat
P1984
FIG. 19 LIMIT THERMOSTAT WIRING
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.
Page 19
32430 070700
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.
SERVICE (cont.)
Solenoid Valve
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.
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.
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.
BLK to Relay
WHI to Relay
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.
P1588
FIG. 21 SOLENOID VALVE WIRING
Page 20
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 21
32430 121699
SERVICE (cont.)
Tank Heater
FIG. 23 TANK HEATER
P1715
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.
WHI (Models OL15 & 20) to Terminal Block
RED (Models OL35 & RL35) to Terminal Block
P1716
BLK to Control Thermostat
Page 22
FIG. 24 TANK HEATER WIRING
32430 121699
SERVICE (cont.)
Water Level and Overflow Safety Switch
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.
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.
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 23
to BLK on Brew Station
Warmer Switch
FIG. 26 WATER LEVEL and OVERFLOW
SAFETY SWITCH WIRING
P1478
32430 121699
SERVICE (cont.)
Master ON/OFF Switch
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.
P1712
FIG. 27 MASTER ON/OFF SWITCH - MODEL OL
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
P1713
Main Wiring harness
BLK
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.
Test Procedure:
1. Disconnect the brewer from the power source
and remove the wires from all terminals of the
Master ON/OFF switch.
Page 24
RED
P3955
FIG. 29 MASTER ON/OFF SWITCH WIRING
32430 010308
SCHEMATIC WIRING DIAGRAM
GREEN
OL 35
L1
N
BLK
RED
L2
MAIN ON/OFF SWITCH
(Late Models only)
BLK
SW. &
THERMOSTAT
LIMIT
THERMOSTAT
BLK
BLU
BLK
TANK HEATER
RED
WHI
WHI
"KEEP WARM" HEATER
BLK
BLK
P3
P2 & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
WHI
BLK
WHI
P2
WHI
UPPER WARMER
BLK
WHI
BLK
BLK
WHI
BREW STATION WARMER
BREW SW
BLK
SOL
LEVEL SW
PNK
PNK
BLK
P3
BLK
BLU
P1
BLU
WHI
P2
WHI
K1
N.O.
K1
SAFETY SW
PNK
PNK
BLK
P3
BLK
BLU
P1
BLU
WHI
P2
WHI
P1,P2 & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
OPTIONAL LOW WATER PRESSURE VALVE
WHI
BLK
120/240 VOLTS AC
3 WIRE + GND
SINGLE PHASE
60 HZ
VIO
BR. RECT
BLK
SOL
WHI/VIO
10007.0000E 01/07 © 1990 BUNN-O-MATIC CORPORATION
Page 25
32430 010308
SCHEMATIC WIRING DIAGRAM OLA
L1
SW. &
THERMOSTAT
LIMIT
THERMOSTAT
BLK
L2
GRN/YEL
BLK
BLU
TANK HEATER
RED
WHI
WHI
"KEEP WARM" HEATER
BLK
BLK
P3
WHI
BLK
WHI
P2
RED
UPPER WARMER
BLK
BLK
RED
BLK
RED
BREW STATION WARMER
BREW SW
BLK
SOL
LEVEL SW
PNK
PNK
BLK
P3
BLK
BLU
P1
BLU
WHI
P2
WHI
K1
K1
N.O.
SAFETY SW
PNK
PNK
BLK
BLK
P3
BLK
BLU
P1
BLU
WHI
P2
OPTIONAL LOW WATER PRESSURE VALVE
WHI
VIO
SOL
BR.
RECT
BLK
WHI/VIO
RED
P1,P2 & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
220-240 VOLTS AC
2 WIRE
SINGLE PHASE
50-60 HZ
10651.0000C 10/98 © 1990 BUNN-O-MATIC CORPORATION
Page 26
32430 121699
GRN
N
L2
WHI
BLK
L1
RED
SCHEMATIC WIRING DIAGRAM RL
MAIN ON/OFF SWITCH
(Late Models only)
LIMIT
THERMOSTAT
BLK
SW. &
THERMOSTAT
BLK
BLU
BLK
RED
TANK HEATER
WHI
WHI
"KEEP WARM" HEATER
BLK
BLK
WHI
BLK
WHI
BREW STATION WARMER
BREW SW
LEVEL SW
PNK
PNK
BLK
SOL
K1
BLK
P3
BLK
BLU
P1
BLU
WHI
P2
WHI
SAFETY SW
PNK
PNK
N.O.
K1
BLK
BLK
P3
BLK
BLU
P1
BLU
WHI
P2
WHI
P1, P2, & P3 ARE PINS OF A
POLARIZED THREE-PIN
CONNECTOR.
OPTIONAL LOW WATER PRESSURE VALVE
WHI
VIO
BR. RECT
BLK
SOL
WHI/VIO
OFF
BLK
L1
1
ON
ON
OFF
BLK
1
ON
ON
OFF
OFF
L1
1
ON
ON
OFF
WHI
LEFT REAR WARMER
L1
BLK
BLK
BLK
OFF
BLK
WHI
LEFT FRONT WARMER
OFF
L1
1
ON
ON
BLK
WHI
RIGHT FRONT WARMER
OFF
WHI
BLK
RIGHT REAR WARMER
120/240 VOLTS AC
3 WIRE + GND
SINGLE PHASE
60 HZ
Page 27
32424.0000B 01/07 © 2007 BUNN-O-MATIC CORPORATION
32430 010308
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