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  9. Bunn TW Instruction and safety manual

Bunn TW Instruction and safety manual

BUNN-O-MATIC CORPORATION
TW
TWF
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
TELEPHONE: (217) 52 -6601 FAX: (217) 52 -6644
10510.0000 11/00 © 1990 Bunn-O-Matic Corporation
OPERATING & SERVICE MANUAL
BUNN
®
Page 2
CONTENTS
Introduction ............................................................. 2
Warranty .................................................................. 2
U er Notice ............................................................ 3
Electrical Requirement ........................................... 4
Plumbing Requirement .......................................... 4
Initial Set-Up............................................................ 5
Adju ting Brew Control .......................................... 6
Cleaning................................................................... 6
Operating Control ................................................... 7
Tea Brewing ............................................................. 7
Trouble hooting ....................................................... 8
Service................................................................... 14
Wiring Diagram ..................................................... 31
INTRODUCTION
Thi equipment will brew a half-gallon batch of hot coffee into an airpot erver or di pen er and a three-
gallon batch of fre h tea into a di pen er and di pen e at approximately room temperature to con erve ice. The
brewer i only for indoor u e on a turdy counter or helf.
WARRANTY
Bunn-O-Matic Corp. (“Bunn”) warrant the equipment manufactured by it to be commercially free from
defect in material and workman hip exi ting at the time of manufacture and appearing within one year from the
date of in tallation. In addition:
1.) Bunn warrant electronic circuit and/or control board to be commercially free from defect in material
and workman hip for two year from the date of in tallation.
2.) Bunn warrant the compre or on refrigeration equipment to be commercially free from defect in mate-
rial and workman hip for two year from the date of in tallation.
3.) Bunn warrant that the grinding burr on coffee grinding equipment will grind coffee to meet original
factory creen ieve analy i for three year from date of in tallation or for 30,000 pound of coffee, whichever
come fir t.
Thi warranty doe not apply to any equipment, component or part that wa not manufactured by Bunn or
that, in Bunn’ judgement, ha been affected by mi u e, neglect, alteration, improper in tallation or operation,
improper maintenance or repair, damage or ca ualty.
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 agent , dealer or employee of Bunn are
not authorized to make modification to thi warranty or to make additional warrantie that are binding on Bunn.
Accordingly, tatement by uch individual , whether oral or written, do not con titute warrantie and hould not
be relied upon.
The Buyer hall give Bunn prompt notice of any claim to be made under thi warranty by telephone at (217)
529-6601 or by writing to Po t Office Box 3227, Springfield, Illinoi , 62708-3227. If reque ted by Bunn, the
Buyer hall hip the defective equipment prepaid to an authorized Bunn ervice location. If Bunn determine , in
it ole di cretion, that the equipment doe not conform to the warranty, Bunn hall repair the equipment with no
charge for part during the warranty period and no charge for labor by a Bunn Authorized Service Repre entative
during the warranty period. If Bunn determine that repair i not fea ible, Bunn hall, at it ole option, replace
the equipment or refund the purcha e 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, AS
SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, REPLACEMENT OR REFUND.
In no event hall Bunn be liable for any other damage or lo , including, but not limited to, lo t profit , lo t
ale , lo of u e of equipment, claim of Buyer’ cu tomer , co t of capital, co t of down time, co t of ub ti-
tute equipment, facilitie or ervice , or any other pecial, incidental or con equential damage .
10510 071000
Page 3
#00831.0000
#00656.0000
#03408.0000
#03409.0000
#02822.0000
USER NOTICES
Carefully read and follow all notice on the equipment and in thi manual. They were written for your protec-
tion. All notice on the equipment hould be kept in good condition. Replace any unreadable or damaged label
10510 081599
Page 4
ELECTRICAL REQUIREMENTS
CAUTION - The brewer mu t be di connected from the power ource until pecified in
Initial Set-Up.
120V model brewer require 2-wire, grounded ervice rated 120 volt
ac, 15 amp, ingle pha e, 60 Hz.
120/208V model brewer require 3-wire, grounded ervice rated 120/
208 volt, 20 amp, ingle pha e, 60 Hz.
Electrical Hook-Up
CAUTION – Improper electrical in tallation will damage electronic component .
1. An electrician mu t provide electrical ervice a pecified.
2. Remove the top lid and rotate the control thermo tat knob fully counterclockwi e to the "OFF" po ition.
3. a) 120V brewer have an attached cord et. Plug in the brewer and proceed to #6.
b) 120/208V brewer , feed the cord through the train relief at the rear of the brewer and connect it to the
terminal block.
4. U ing a voltmeter, check the voltage and color coding of each conductor at the power ource.
5. Connect the brewer to the power ource and verify the voltage at the terminal block.
6. If plumbing i to be hooked up later be ure the brewer i di connected from the power ource. If plumbing
ha been hooked up, the brewer i ready for
Initial Set-Up.
PLUMBING REQUIREMENTS
The e brewer mu t be connected to a cold water y tem with operating pre ure between 20 (128) and 90
p i (620 kPa) from a 1⁄2" or larger upply line. A hut-off valve hould be in talled in the line before the brewer.
In tall a regulator in the line when pre ure i greater than 90 p i (620 kPa) to reduce it to 50 p i (345 kPa). The
water inlet fitting i 1⁄4" flare.
NOTE - Bunn-O-Matic recommend 1⁄4" copper tubing for in tallation of le than 25 feet and 3⁄8" for more than
25 feet from the 1⁄2" water upply line. A tight coil of copper tubing in the water line will facilitate moving the
brewer to clean the countertop. Bunn-O-Matic doe not recommend the u e of a addle valve to in tall the
brewer. The ize and hape of the hole made in the upply line by thi type of device may re trict water flow.
1. Remove the hipping cap( ) from the bulkhead fitting( ) on the rear of the brewer.
2. Attach the flare fitting from the hort piece of tubing on the trainer/flow control ( upplied) to the water inlet
fitting( ) at the rear of the brewer.
3. Flu h the water line and ecurely attach it to the flare fitting on the tee or trainer/flow control.
4. Turn on the water upply.
5. On brewer with a faucet, place an empty ve el beneath the faucet and lift the handle until water i di -
pen ed.
L2 RED
WHITE
NEUTRAL
L1 BLACK
120V.A.C.
120V.A.C.
208V.A.C.
This equipment must be installed to comply with the Basic Plumbing Code of the
Building Officials and Code Administrators International, Inc. (BOCA)
and the Food Service Sanitation Manual of the Food and Drug Administration (FDA).
10510 071000
Page 5
INITIAL SET-UP
CAUTION – The brewer mu t be unplugged throughout the initial et-up, except when pecified in the in truc-
tion .
1. Remove the top lid from the brewer.
2. Rotate the control thermo tat knob fully counterclockwi e to the “OFF” po ition and replace the top lid.
3. In ert the funnel (empty) into the funnel rail .
4. Place an empty tea di pen er on the brewer ba e. Be prepared to empty the di pen er a few time .
5. Plug in the brewer, place the TEA/OFF/COFFEE witch in the “COFFEE” po ition, and momentarily pre the
tart witch. When the flow of water into the tank top , pre the START witch to initiate a econd cycle.
Wait until the flow of water top and tart a third cycle. During the third cycle, the tank will fill to it capacity
and the exce will flow from the funnel into the di pen er. Empty the di pen er when thi third cycle top .
6. Place the TEA/OFF/COFFEE witch in the “TEA” po ition and begin another brew cycle.
7. Mea ure the total water volume from the di pen er. It hould be approximately (396 ounce .)
8. If not, adju t the Iced Tea Brew Timer (right timer) a required. (See
Adju ting Brew Volume
)
9. Start, and mea ure another cycle.
10. Repeat tep 7-9 until the recommended total water volume (396 ounce ) i achieved.
11. The concentrate valve i pre-adju ted to deliver the correct ratio of brew water to dilution water.
12. Unplug the brewer, remove the top lid, rotate the control thermo tat knob fully clockwi e to the “ON” po ition
and replace the top lid.
13. Empty the di pen er.
14. Plug in the brewer and wait for the water in the tank to heat to brewing temperature (approximately 20
minute ). Some water will drip from the funnel during thi time; thi i due to expan ion and hould not
occur thereafter.
15. Place the TEA/OFF/COFFEE witch in the “COFFEE” po ition and begin another brew cycle. Empty the re er-
voir after water ha topped flowing from the funnel.
16. Allow the water in the tank to heat to the proper temperature and begin another brew cycle.
17. Mea ure the total water volume from the di pen er. It hould be approximately 64 ounce .
18. If not, adju t the Coffee Brew Timer (left timer) a required. (See
Adju ting Brew Volume
)
19. Start, and mea ure another cycle.
20. Repeat tep 17-19 until the recommended total water volume (64 ounce ) i achieved.
21 The brewer i now ready to brew approximately one-half gallon of hot coffee or 3-gallon of fre hly brewed
room temperature tea.
BREWERS W/OUT FAUCET BREWERS W/FAUCET
PLUMBING REQUIREMENTS (cont.)
P1394 P1392
10510 071000
Page 6
ADJUSTING BREW VOLUMES
CAUTION - Di connect the power ource from the brewer prior to the removal of any panel for the replacement
or adju tment of any component.
NOTE: Prior to etting or modifying batch ize , check that the brewer i connected to water upply, the tank i
properly filled, and a funnel and erver are in place.
1. Modifying batch sizes. To modify a batch volume, fir t check that the SET/LOCK witch i in the “SET”
po ition on the circuit board.
To increase a batch size. Pre and hold the START or BREW witch until three click are heard. Relea e the
witch (Failure to relea e the witch within two econd after the third click cau e the volume etting to be
aborted and previou volume etting will remain in memory) and pre it again one or more time . Each time
the witch i pre ed, two econd are added to the brew time period. Allow the brew cycle to fini h in order
to verify that the de ired volume ha been achieved.
To decrease a batch size. Pre and relea e the START or BREW witch once for every two- econd interval
to be removed from the total brew time period; then immediately pre and hold down the START or BREW
witch until three click are heard. Relea e the witch. (Failure to relea e the witch within two econd after
the third click cau e the volume etting to be aborted and previou volume etting will remain in memory).
Allow the brew cycle to fini h in order to verify that the de ired volume ha been achieved.
2. Setting batch sizes. To et a batch volume, fir t check that the SET/LOCK witch i in the “SET” po ition on
the circuit board. Pre and hold the START or BREW witch until three di tinct click are heard, and then
relea e the witch. (Failure to relea e the witch within two econd after the third click cau e the volume
etting to be aborted and previou volume etting will remain in memory). View the level of the liquid being
di pen ed. When the de ired level i reached, turn the ON/OFF witch to “OFF” (lower). The brewer remem-
ber thi volume and will continue to brew batche of thi ize until the volume etting procedure i repeated.
NOTE: When brewing coffee, batch volume will decrea e due to ab orption by the coffee ground .
3. Setting programming disable feature. If it become nece ary to prevent anyone from changing brew time
once programmed, you can et the SET/LOCK witch to the “LOCK” po ition. Thi will prevent any program-
ming to be done until witch i once again placed in the “SET” po ition.
CLEANING
CAUTION – Do not keep brewed tea overnight. Clean and anitize your iced tea di pen er daily
1. Remove and thoroughly clean the brew funnel. The funnel tip and creen mu t be free from any tea particle
or re idue. Rea emble the funnel.
2. Unplug the brewer. Remove and thoroughly rin e the prayhead. The hole mu t be open and clear of any
mineral depo it . Wipe the prayhead panel clean with a damp cloth.
3. In ert the deliming pring into the prayhead fitting until no more than one inch i vi ible and move it in and
out 5 or 6 time . In ert the pring into the airvent hole in the prayhead panel and move it in and out 5 or 6
time . Reattach the prayhead.
4. Wa h the entire out ide urface of the brewer with a clean damp cloth.
INITIAL SET-UP (cont.)
10510 071000
Page 7
OPERATING CONTROLS
A. TEA/OFF/COFFEE Switch
TEA– Placing the witch in the left po ition allow the tart witch to activate a timed brew cycle delivering .5
gallon of tea concentrate and 2.5 gallon of dilution water into the di pen er.
OFF – Placing the witch in the center po ition top the brew cycle. Stopping a brew cycle after it ha tarted
will not top the flow of water into the funnel until the tank yphon down to it level. The witch hould alway
be placed in thi po ition after a brew cycle and whenever the brewer i unattended.
COFFEE– Placing the witch in the right po ition allow the tart witch to activate a timed brew cycle delivering
.5 gallon of hot coffee into an airpot di pen er.
B. Start Switch
Start a brew cycle when the TEA/OFF/COFFEE witch i in either the “TEA” or “COFFEE” po ition.
BREWING
1. Begin brewing with a clean empty brew funnel and di pen er. (Be ure the erver lid doe n't interfere with
the flow of dilution water)
2. In ert a BUNN® filter into the funnel.
3. Pour the packet of fre h tea leave or coffee into the filter. Approximately 4 ounce i recommended for tea.
4. Level the bed of tea leave or coffee by gently haking.
5. Slide the funnel into the funnel rail until it top .
6. Place the TEA/OFF/COFFEE witch in the de ired po ition.
7. Momentarily pre the tart witch.
CAUTION – The funnel contain hot liquid. Remove funnel lowly.
8. Carefully remove the brew funnel and di card it content after liquid top flowing from the funnel.
9. Place the TEA/OFF/COFFEE witch in the “OFF” po ition to prevent a fal e tart.
10510 071000
Page 8
TROUBLESHOOTING
A trouble hooting guide i provided to ugge t probable cau e and remedie for the mo t likely problem
encountered. If the problem remain after exhau ting the trouble hooting tep , contact the Bunn-O-Matic
Technical Service Department.
• In pection, te ting, and repair of electrical equipment hould be performed only by qualified ervice per on-
nel.
• All electronic component have 120 volt ac and low voltage dc potential on their terminal . Shorting of
terminal or the application of external voltage may re ult in board failure.
• Intermittent operation of electronic circuit board i unlikely. Board failure will normally be permanent. If an
intermittent condition i encountered, the cau e will likely be a witch contact or a loo e connection at a
terminal or crimp.
• Solenoid removal require interrupting the water upply to the valve. Damage may re ult if olenoid are
energized for more than ten minute without a upply of water.
• The u e of two wrenche i recommended whenever plumbing fitting are tightened or loo ened. Thi will
help to avoid twi t and kink in the tubing.
• Make certain that all plumbing connection are ealed and electrical connection tight and i olated.
• Thi brewer i heated at all time . Keep away from combu tible .
WARNING –
• Exerci e extreme caution when ervicing electrical equipment.
• Unplug the brewer when ervicing, except when electrical te t are pecified.
• Follow recommended ervice procedure
• Replace all protective hield or afety notice
Problem
Brew cycle( ) will not tart
Probable Cause
1. No water
2. No power or incorrect voltage to
the brewer
3. External Strainer/ Flow Control
(.750 GPM)
4. TEA/OFF/COFFEE Switch
5. Start Switch
Remedy
Water line and valve to the brewer
mu t be open.
Check circuit breaker or fu e .
(A) Direction of flow arrow mu t be
pointing toward the brewer.
(B) Remove the trainer/flow con-
trol and check for ob truction .
Clear or replace.
Refer to
Service
- TEA/OFF/COFFEE
Switch for te ting. See page 26
Refer to
Service
- Start Switch for
te ting procedure . See page 27
10510 071000
Page 9
TROUBLESHOOTING (cont.)
PROBLEM PROBABLE CAUSE REMEDY
Brew cycle( ) will not tart (cont.)
Brew water i not hot
Dilution (Iced Tea) cycle will not
tart
6. Brew Timer
A) Iced Tea
B) Hot Coffee
7. Brew Solenoid Valve
A) Iced Tea
B) Hot Coffee
8. Internal Flow control (.195 GPM)
(Hot Coffee Only)
1. Limit Thermo tat
CAUTION - Do not eliminate or by-
pa limit thermo tat. U e only
BOM replacement part
#29329.1000
2. Thermal Fu e
CAUTION - Do not eliminate or by-
pa thermal fu e.
3. Control Thermo tat
4. Tank Heater
1. TEA/OFF/COFFEE Switch
Refer to
Service
- Brew Timer (Iced
Tea) for te ting procedure . See
page 20 or 21
Refer to
Service
- Brew Timer (Hot
Coffee) for te ting procedure . See
page 17 or 18
Refer to
Service
- Brew Solenoid
Valve (Iced Tea) for te ting proce-
dure . See page 16
Refer to
Service
- Brew Solenoid
Valve (Hot Coffee) for te ting pro-
cedure . See page 15
(A) Direction of flow arrow mu t be
pointing toward brewer.
(B) Remove the flow control and
check for ob truction . Clear or re-
place.
Refer to
Service
- Limit Thermo tat
for te ting procedure . See page 25
Refer to
Service
- Thermal fu e for
te ting procedure . See page 29
Refer to
Service
- Control Thermo-
tat for te ting procedure . See
page 23
Refer to
Service
- Tank Heater for
te ting procedure . See page 28
Refer to
Service
- TEA/OFF/COFFEE
Switch for te ting procedure . See
page 26
10510 071000
Page 10
TROUBLESHOOTING (cont.)
PROBLEM PROBABLE CAUSE REMEDY
Dilution (Iced Tea) cycle will not
tart (cont.)
Incon i tent beverage level in di -
pen er (Hot Coffee)
Con i tently high or low beverage
level in the di pen er
2. Start Switch
3. Brew Timer (Iced Tea)
4. Brew Solenoid Valve (Iced Tea)
5. Dilution Solenoid Valve
1. Internal Flow Control (.195 GPM)
2. Syphon Sy tem
3. Lime Build-up
CAUTION - Tank and tank compo-
nent hould be delimed regularly
depending on local water condi-
tion . Exce ive mineral build-up
on tainle teel urface can ini-
tiate corro ive reaction re ulting
in eriou leak .
4. Water Pre ure
1. Brew Timer
Refer to
Service
- Start Switch for
te ting procedure . See page 27
Refer to
Service-
Brew Timer (Iced
Tea) for te ting procedure . See
page 20 or 21
Refer to Service -
Brew Solenoid
Valve (Iced Tea) for te ting proce-
dure . See page 16
Refer to
Service
- Dilution Solenoid
Valve for te ting procedure . See
page 24
(A) Direction of flow arrow mu t be
pointing toward the brewer.
(B) Remove the flow control and
check for ob truction. Clear or re-
place.
The brewer mu t be level or lightly
lower in front to yphon properly.
In pect the tank a embly for ex-
ce ive lime depo it . Delime a
required.
The water pre ure to the brewer
mu t be at lea t 20 p i (128 kPa).
With the TEA/OFF/COFFEE witch in
the "TEA" po ition adju t the needle
valve to achieve the recommended
76 oz of concentrate then the timer
to achieve a total of 396 oz for each
three-gallon brew cycle.
10510 071000
Page 11
TROUBLESHOOTING (cont.)
PROBLEM
Con i tently high or low beverage
level in the di pen er. (cont.)
Spitting or exce ive teaming
Drip-out time too long
Dripping from prayhead
PROBABLE CAUSE
2. External Strainer/Flow Control
(.750 GPM)
1. Lime Build-up
CAUTION - Tank and tank compo-
nent hould be delimed regularly
depending on local water condi-
tion . Exce ive mineral build-up
on tainle teel urface can ini-
tiate corro ive reaction re ulting
in eriou leak .
2. Control Thermo tat
1. Funnel Tip
1. Syphon Sy tem
2. Lime Build-up
CAUTION - Tank and tank compo-
nent hould be delimed regularly
depending on local water condi-
tion . Exce ive mineral build-up
on tainle teel urface can ini-
tiate corro ive reaction re ulting
in eriou leak .
3. Brew Solenoid Valve
A) Iced Tea
B) Hot Coffee
REMEDY
(A) Direction of flow arrow mu t be
pointing toward brewer.
(B) Remove the trainer/flow con-
trol and check for ob truction .
Clear or replace.
In pect tank a embly for exce ive
lime depo it . Delime a required.
Refer to
Service
- Control Thermo-
tat for te ting procedure . See
page 23
The brew funnel hould be cleaned
thoroughly before each brew cycle
to le en the chance of tea leaf par-
ticle clogging the drip-out tip.
The brewer mu t be level or lightly
lower in front to yphon properly.
In pect the tank a embly for ex-
ce ive lime depo it . Delime a
required.
Refer to
Service
- Brew Solenoid
Valve (Iced Tea) for te ting proce-
dure . See page 16
Refer to
Service-
Brew Solenoid
Valve (Hot Coffee) for te ting pro-
cedure . See Page 15
10510 071000
Page 12
TROUBLESHOOTING (cont.)
Water flow into tank continuou ly
(TEA/OFF/COFFEE Switch in the
"TEA or "COFFEE" po ition)
Water flow into tank continuou ly
(TEA/OFF/COFFEE Switch in the
"OFF" po ition)
Beverage overflow di pen er
1. Brew Timer
A) Iced Tea
B) Hot Coffee
1. Brew Solenoid Valve
A) Iced Tea
B) Hot Coffee
1. Di pen er
2. Brew Timer
A) Iced Tea
B) Hot Coffee
3. Brew Solenoid Valve
A) Iced Tea
B) Hot Coffee
4. Dilution Solenoid Valve
Refer to
Service
- Brew Timer (Iced
Tea) for te ting procedure . See
page 20 or 21
Refer to
Service-
Brew Timer (Hot
Coffee) for te ting procedure . See
page 17 or 18
Refer to Service - Brew Solenoid
Valve (Iced Tea) for te ting proce-
dure . See page 16
Refer to
Service
- Brew Solenoid
Valve (Hot Coffee) for te ting pro-
cedure . See page 15
The di pen er mu t be completely
empty before tarting a brew cycle.
Refer to
Service -
Brew Timer (Iced
Tea) for te ting procedure . See
page 20 or 21
Refer to
Service
- Brew Timer (Hot
Coffee) for te ting procedure . See
page 17 or 18
Remove the Iced Tea Brew Solenoid
Valve and clean any ob truction.
Rebuild or replace the valve if nec-
e ary. See page 16
Remove the Hot Coffee Brew Sole-
noid Valve and clean any ob truc-
tion. Rebuild or replace the valve if
nece ary. See page 15
Refer to
Service
- Dilution Solenoid
Valve for te ting procedure . See
page 24
REMEDY
PROBABLE CAUSEPROBLEM
10510 071000
Page 13
BUNN® paper filter mu t be u ed
for proper extraction.
A ufficient quantity of fre h tea
leave or coffee hould be u ed for
proper extraction.
A ix-hole (or even-hole for Mod-
el with 90 oz concentrate option)
tainle teel prayhead mu t be
u ed for proper extraction.
The BUNN® paper filter mu t be cen-
tered in the funnel and the bed of tea
leave leveled by gentle haking.
Place an empty funnel on an empty
di pen er beneath the prayhead. Ini-
tiate a brew cycle and check the wa-
ter temperature immediately below
the prayhead with a thermometer.
The reading hould not be le than
200°F(93°C). Adju t the control ther-
mo tat to increa e the water tempera-
ture. Replace if nece ary.
The BUNN® paper filter mu t be cen-
tered in the funnel and the bed of
ground leveled by gently haking.
The nut on the olenoid( ) mu t be
tight or it will vibrate during opera-
tion.
Plumbing line hould not be re t-
ing on the counter top.
(A) The brewer mu t be connected
to a cold water line.
(B) Water pre ure to the brewer
mu t not exceed 90 p i(620 kPa).
In tall a regulator if nece ary to
lower the working pre ure to ap-
proximately 50 p i(345 kPa).
Remove and clean lime off the tank
heater. See page 28
1. Filter Type
2. Tea or Coffee
3. Sprayhead
4. Funnel Loading
5. Water Temperature
1. Funnel Loading
1. Solenoid( )
2. Plumbing Line
3. Water Supply
4. Tank Heater
Weak beverage
Dry tea leave remain in the funnel
Brewer i making unu ual noi e
TROUBLESHOOTING (cont.)
REMEDY
PROBABLE CAUSEPROBLEM
10510 071000
Page 14
SERVICE
Thi ection provide procedure for te ting and
replacing variou major component u ed in thi
brewer hould ervice become nece ary. Refer to
Trouble hooting
for a i tance in determining the
cau e of any problem.
WARNING - In pection, te ting, and repair of electri-
cal equipment hould be performed only by qualified
ervice per onnel. The brewer hould be di connected
from the power ource when ervicing, except when
electrical te t are required and the te t procedure pe-
cifically tate to plug-in the brewer.
COMPONENT ACCESS
WARNING - Di connect the brewer from the power
ource before the removal of any panel or the replace-
ment of any component.
All component are acce ible by the removal of
the top cover and rear in pection panel.
The top cover i attached with four #6-32 crew .
Removal of the top cover will allow acce to TEA/OFF/
COFFEE witch, tart witch, brew timer , control
thermo tat, limit thermo tat, thermal fu e and tank
heater.
The rear in pection panel i attached with ix #8-
32 crew . Remove of the rear panel will allow acce
to the brew olenoid valve and the dilution olenoid
valve .195 GPM flow control and check valve.
Contents
Brew Solenoid Valve (Hot Coffee) ....................... 15
Brew Solenoid Valve (Iced Tea) .......................... 16
Brew Timer (Hot Coffee- Early Model ) .............. 17
Digital Brew Timer (Hot Coffee-Late Model ) ..... 18
Brew Timer (Iced Tea - Early Model ) ................. 20
Digital Brew Timer (Iced Tea-Late Model ) ......... 21
Control Thermo tat............................................. 23
Dilution Solenoid Valve ....................................... 24
Limit Thermo tat ................................................ 25
TEA/OFF/COFFEE Switch ..................................... 26
Start Switch ........................................................ 27
Tank Heater ......................................................... 28
Thermal Fu e ...................................................... 29
Half Batch Switch (Optional)............................... 30
Wiring Diagram ................................................. 31
FIG. 1 COMPONENT ACCESS
P1959.60
10510 071000
Page 15
Location:
Viewing the brewer from the, rear the hot coffee
brew olenoid valve i mounted on the left ide of the
mounting bracket.
Te t Procedure :
1. Di connect the brewer from the power ource.
2. Di connect the white/red and white/green wire
from the hot coffee olenoid valve. With the TEA/
OFF/COFFEE witch in the "COFFEE" po ition pre
the START witch.
3. With a voltmeter, check the voltage acro the
white/red and white/green wire . Connect the
brewer to the power ource. The indication mu t
be 120 volt ac for two wire 120 volt model and
three wire 120/208 volt model .
4. Di connect the brewer from the power ource.
If voltage i pre ent a de cribed, proceed to #5
If voltage i not pre ent a de cribed, refer to
Wiring
Diagram
and check brewer wiring harne .
5. Check for continuity acro the hot coffee ole-
noid valve coil terminal .
If continuity i pre ent a de cribed, reconnect the
white/red and white/green wire from the hot coffee
brew timer.
FIG. 2 HOT COFFEE BREW SOLENOID VALVE
P2198.50
SERVICE (cont.)
BREW SOLENOID VALVE (HOT COFFEE)
If continuity i not pre ent a de cribed, replace the
olenoid valve.
6. Check the hot coffee olenoid valve for coil ac-
tion. Connect the brewer to the power ource. With
TEA/OFF/COFFEE witch in the "COFFEE" po ition
pre the START witch and li ten carefully in the
vicinity of the olenoid valve for a "clicking" ound
a the coil magnet attract .
7. Di connect the brewer from the power ource.
If the ound i heard a de cribed and water will not
pa through the olenoid valve, there may be a block-
age in the water line before the olenoid valve or, the
olenoid valve may require in pection for wear, and
removal of waterborne particle .
If the ound i not heard a de cribed, replace the
olenoid valve.
Removal and Replacement:
1. Remove all wire from olenoid valve .
2. Turn off the water upply to the brewer.
3. Di connect the water line to and from the ole-
noid valve .
4. Remove the two #8-32 kep nut holding the
mounting bracket to the brewer ba e.
5. Lift out the bracket.
6. Remove the two #10-32 lotted-head crew hold-
ing the hot coffee olenoid valve to the mounting
bracket.
7. Securely in tall the new hot coffee olenoid valve
to the mounting bracket.
8. Attach the mounting bracket to the brewer ba e.
9. Securely fa ten the water line to and from the
olenoid valve .
10. Refer to Fig. 3 when reconnecting the wire .
P1364
HOT COFFEE
BREW SOLENOID
ICED TEA BREW
SOLENOID
DILUTION
SOLENOID
WHI/GRN to Hot Coffee Timer TL4
WHI/RED to Hot Coffee Timer TL1
FIG.3 SOLENOID VALVE TERMINALS
10510 081599
Page 16
P2198.50
FIG. 4 ICED TEA BREW SOLENOID VALVE
Location:
Viewing the brewer from the rear, the iced tea brew
olenoid valve i mounted in the center of the mount-
ing bracket.
Te t Procedure :
1. Di connect the brewer from the power ource.
2. Di connect the white/violet and white/blue wire
from the iced tea brew olenoid valve. With the
TEA/OFF/COFFEE witch in the "TEA" po ition pre
the START witch.
3. With a voltmeter, check the voltage acro the
white/violet and white/blue wire . Connect the
brewer to the power ource. The indication mu t
be 120 volt ac for two wire 120 volt model and
three wire 120/208 volt model .
4. Di connect the brewer from the power ource.
If voltage i pre ent a de cribed, proceed to #5
If voltage i not pre ent a de cribed, refer to
Wiring
Diagram
and check brewer wiring harne .
5. Check for continuity acro the iced tea brew o-
lenoid valve coil terminal .
If continuity i pre ent a de cribed, reconnect the
white/violet and white/blue wire from the iced tea
brew timer.
If continuity i not pre ent a de cribed, replace the
olenoid valve.
6. Check the iced tea olenoid valve for coil action.
Connect the brewer to the power ource. With TEA/
OFF/COFFEE witch in the "TEA" po ition pre
the START witch and li ten carefully in the vicin-
ity of the olenoid valve for a "clicking" ound a
the coil magnet attract .
7. Di connect the brewer from the power ource.
If the ound i heard a de cribed and water will not
pa through the olenoid valve, there may be a block-
age in the water line before the olenoid valve or, the
olenoid valve may require in pection for wear, and
removal of waterborne particle .
If the ound i not heard a de cribed, replace the
olenoid valve.
Removal and Replacement:
1. Remove all wire from olenoid valve .
2. Turn off the water upply to the brewer.
3. Di connect the water line to and from the ole-
noid valve .
4. Remove the two #8-32 kep nut holding the
mounting bracket to the brewer ba e.
5. Lift out the bracket.
6. Remove the two #10-32 lotted-head crew hold-
ing the iced tea brew olenoid valve to the mount-
ing bracket.
7. Securely in tall the new iced tea brew olenoid
valve to the mounting bracket.
8. Attach the mounting bracket to the brewer ba e.
9. Securely fa ten the water line to and from the
olenoid valve .
10. Refer to Fig. 5 when reconnecting the wire .
SERVICE (cont.)
BREW SOLENOID VALVE (ICED TEA)
FIG.5 SOLENOID VALVE TERMINALS P1364
HOT COFFEE
BREW SOLENOID
ICED TEA BREW
SOLENOID
DILUTION
SOLENOID
WHI/BLU to Dilution
Solenoid
WHI/VIO to Dilution
Solenoid
10510 081599
Page 17
Location:
The hot coffee brew timer i located in the hood on
the left ide. It con i t of a dial plate and circuit board.
Te t Procedure:
1. Di connect the brewer from the power ource.
2. Remove the wire from terminal TL3, TL4, & TL5
of the timer and rotate the dial fully counterclock-
wi e.
2. With a voltmeter, check the voltage acro termi-
nal TL1 and TL2 when the TEA/OFF/COFFEE
witch i in the “COFFEE” po ition. Connect the
brewer to the power ource. The indication mu t
be 120 volt ac for two wire 120 volt model and
three wire 120/208 volt model .
3. Di connect the brewer from the power ource.
If voltage i pre ent a de cribed, proceed to #4.
If voltage i not pre ent a de cribed, refer to the
Wir-
ing Diagram
and check the wiring harne .
4. Check for continuity acro the white/orange and
white/yellow wire when the START witch i held
in the lower po ition.
If continuity i pre ent a de cribed, reconnect the
wire to terminal TL3, TL4, & TL5 of the timer board
and proceed to #5.
If continuity i not pre ent a de cribed, refer to the
Wiring Diagram
and check the wiring harne .
5. With a voltmeter, check the voltage acro termi-
nal TL1 and TL4 when the TEA/OFF/COFFEE
witch i in the “COFFEE” po ition and the START
witch i momentarily placed in the lower po i-
tion. Connect the brewer to the power ource.
The indication mu t be 120 volt ac for two wire
120 volt model and three wire 120/208 volt mod-
el for approximately twenty econd and then re-
turn to it previou indication.
6. Di connect the brewer from the power ource.
If voltage i pre ent a de cribed, the timer i operat-
ing properly. Adju t the timer dial a required.
If voltage i not pre ent a de cribed, replace the timer.
Removal and Replacement:
1. Remove all wire from the timer.
2. Remove the circuit board and dial plate from the
bracket .
3. In tall the new timer circuit board a de cribed in
Late Model Timer
ection on the following page .
4. Refer to Fig. 9 when reconnecting the wire .
5. In tall the Timer Setting decal, provided with the
replacement timer kit, to the rear of the chematic,
on the top cover.
6. Adju t the timer a required. Refer to
Late Model
Timer
ection on the following page .
FIG. 7 HOT COFFEE BREW TIMER TERMINALS
P1962
FIG. 6 HOT COFFEE BREW TIMER
P1961.60
SERVICE (cont.)
BREW TIMER (HOT COFFEE- Early Models)
WHI to Power Cord (120V Model )
or WHI to Terminal Block (120/208V
Model )
WHI/RED to Hot Coffee Solenoid
WHI/RED to TEA/OFF/COFFEE Switch
WHI/YEL to START Switch
WHI/GRN to Hot Coffee
Solenoid
WHI/ORA to START Switch
OLD STYLE
10510 071000
Page 18
Location:
The timer i located in ide the hood on the left ide.
Te t Procedure.
NOTE: Do not remove or in tall wire while timer board
i in talled. Pre ure applied to one ide may cau e
damage to the board.
1. Di connect the brewer from the power ource and
remove the front acce panel.
2. Remove the two #8-32 crew ecuring circuit
board to the mounting bracket.
3. Remove circuit board and pacer (a required).
4. With a voltmeter, check the voltage acro termi-
nal TL1 and TL2 when the "TEA/OFF/COFFEE"
witch i in the "COFFEE" po ition. Connect the
brewer to the power ource. The indication mu t
be 120 volt ac for two wire 120 volt model and
three wire 120/208 volt model .
5. Di connect the brewer from the power ource.
If voltage i pre ent a de cribed, proceed to #6.
If voltage i not pre ent a de cribed, refer to the
Wiring Diagram
and check the brewer wiring har-
ne .
6. With a voltmeter, check the voltage acro termi-
nal TL1 and TL4 when the "TEA/OFF/COFFEE"
witch i in the "COFFEE" po ition. Connect the
brewer to the power ource. The indication mu t
be 0 volt .
If voltage i a de cribed, proceed to #7.
If voltage i not a de cribed, di connect the brewer
from the power ource and replace the timer.
7. With a voltmeter, check the voltage acro termi-
nal TL1 and TL4 when the "TEA/OFF/COFFEE"
witch i in the "COFFEE" po ition. Connect the
brewer to the power ource and pre the START
witch. The indication mu t be 120 volt ac for two
wire 120 volt model and three wire 120/208 volt
model .
If voltage i pre ent a de cribed, the brew timer i
operating properly. Re et the timer a required, to
obtain the de ired brew volume.
If voltage i not pre ent a de cribed, di connect the
brewer from the power ource and replace the timer.
Removal and Replacement:
1. Remove the two #8-32 crew ecuring circuit
board to the mounting bracket.
2. Remove circuit board and pacer (a required).
3. Remove all wire from the timer.
4. Attach all wire to the replacement timer board
prior to in tallation to the component mounting
bracket. Refer to FIG. 9 when reconnecting the
wire .
5. In tall new circuit board with pacer (a re-
quired) to the component mounting bracket.
6. Adju t the timer a de cribed below.
Timer Setting:
NOTE: Prior to etting or modifying volume , check
that the brewer i connected to water upply, the tank
i properly filled, and a funnel and erver are in place.
NOTE: All volume etting mu t be done with the
prayhead in talled.
SERVICE (cont.)
DIGITAL BREW TIMER (HOT COFFEE -Late Models)
FIG. 8 DIGITAL BREW TIMER
P2198.50
10510 071000
Page 19
TL1 - WHI/RED to Hot Coffee Solenoid and
WHI/RED to TEA/OFF/COFFEE Switch
TL2 - WHI to Power Cord (120V Model ) or
WHI to Terminal Block (120/208V Model )
TL3 - WHI/ORN to START Switch
TL4 - WHI/GRN to Hot Coffee Solenoid
TL5 - WHI/YEL to START Switch
FIG. 9 DIGITAL TIMER WIRING P2037
SERVICE (cont.)
DIGITAL BREW TIMER (HOT COFFEE - Late
Models)(cont.)
1. Modifying brew volumes. To modify a brew vol-
ume, fir t check that the SET/LOCK witch i in the
“SET” po ition on the circuit board.
To increase a brew volume, place the TEA/OFF/
COFFEE witch in the “COFFEE” po ition, pre and
hold the START witch until three click are heard.
Relea e the witch and pre it again one or more
time . (Failure to relea e the witch within two ec-
ond after the third click cau e the volume etting to
be aborted and previou volume etting will remain in
memory.) Each time the witch i pre ed, two ec-
ond are added to the brew time period. Allow the
brew cycle to fini h in order to verify that the de ired
volume ha been achieved.
To decrease a brew volume, place the TEA/OFF/
COFFEE witch in the “COFFEE” po ition, pre and
relea e the START witch once for every two- econd
interval to be removed from the total brew time pe-
riod; then immediately pre and hold down the START
witch until three click are heard. Relea e the witch.
(Failure to relea e the witch within two econd af-
ter the third click cau e the volume etting to be
aborted and previou volume etting will remain in
memory). Allow the brew cycle to fini h in order to
verify that the de ired volume ha been achieved.
2. Setting brew volumes. To et a brew volume,
fir t check that the SET/LOCK witch i in the “SET”
po ition on the circuit board. Place the TEA/OFF/COF-
FEE witch in the “COFFEE” po ition, pre and hold
the START witch until three di tinct click are heard
and then relea e the witch. (Failure to relea e the
witch within two econd after the third click cau e
the volume etting to be aborted and previou vol-
10510 071000
ume etting will remain in memory.)
View the level of the liquid being di pen ed. When
the de ired level i reached, turn the TEA/OFF/COF-
FEE witch to “OFF”.
NOTE: Several ounce of water will continue to y-
phon from the tank after turning the witch “OFF”.
The brewer remember thi volume and will continue
to brew batche of thi ize until the volume etting
procedure i repeated.
NOTE: When brewing coffee, volume will decrea e due
to ab orption by the coffee ground .
3. Setting programming disable feature. If it be-
come nece ary to prevent anyone from changing
brew time once programmed, you can et the SET/
LOCK witch to the “LOCK” po ition. Thi will pre-
vent any further programming until witch i once
again put into the “SET” po ition.
Page 20
Location:
The iced tea brew timer i located in the hood on
the right ide. It con i t of the dial plate and circuit
board.
Te t Procedure:
1. Di connect the brewer from the power ource.
2. Remove the wire from terminal TL3, TL4, & TL5
of the iced tea timer and rotate the dial fully coun-
terclockwi e.
2. With a voltmeter, check the voltage acro termi-
nal TL1 and TL2 when the TEA/OFF/COFFEE
witch i in the “TEA” po ition. Connect the brewer
to the power ource. The indication mu t be 120
volt ac for two wire 120 volt model and three
wire 120/208 volt model .
3. Di connect the brewer from the power ource.
If voltage i pre ent a de cribed, proceed to #4.
If voltage i not pre ent a de cribed, refer to the Wir-
ing Diagram and check the wiring harne .
4. Check for continuity acro the orange and yel-
low wire when the START witch i held in the
lower po ition.
If continuity i pre ent a de cribed, reconnect the
wire to terminal TL3, TL4, & TL5 of the timer board
and proceed to #5.
If continuity i not pre ent a de cribed, refer to the
Wiring Diagram
and check the wiring harne .
5. With a voltmeter, check the voltage acro termi-
nal TL1 and TL4 when the TEA/OFF/COFFEE
witch i in the “TEA” po ition and the START
witch i momentarily placed in the lower po i-
tion. Connect the brewer to the power ource. The
indication mu t be 120 volt ac for two wire 120
volt model and three wire 120/208 volt model
for approximately twenty econd and then return
to it previou indication.
6. Di connect the brewer from the power ource.
If voltage i pre ent a de cribed, the timer i operat-
ing properly. Adju t the timer dial a required.
If voltage i not pre ent a de cribed, replace the timer.
Removal and Replacement:
1. Remove all wire from the iced tea brew timer.
2. Remove the circuit board and dial plate from the
bracket .
3. In tall the new timer circuit board a de cribed in
Late Model Timer
ection on the following page .
4. Refer to Fig. 13 when reconnecting the wire .
5. In tall the Timer Setting decal, provided with the
replacement timer kit, to the rear of the chematic
on the top cover.
5. Adju t the timer a required. Refer to
Late Model
Timer
ection on the following page .
FIG. 11 ICED TEA BREW TIMER TERMINALS
P1962
FIG. 10 ICED TEA BREW TIMER
P1961.50
SERVICE (cont.)
BREW TIMER (ICED TEA - Early Models)
WHI to Power Cord (120V Model )
or WHI to Terminal Block (120/208V
Model )
WHI/VIO to Iced Tea Solenoid
WHI/VIO to TEA/OFF/COFFEE Switch
YEL to START Switch
WHI/BLU to Iced Tea Solenoid
ORN to START Switch
EARLY MODELS
10510 071000

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