Wilbur Curtis Company, inC.
Service Manual – G4 ThermoPro 1 Gallon Twin
Important Safeguards/Symbols
This equipment is designed for commercial use. Any servicing other than cleaning and routine maintenance
should be performed by an authorized Wilbur Curtis Company Service Technician.
• DO NOT immerse the unit in water or any other liquid
• To reduce the risk of re or electric shock, DO NOT open service panels. There
are no user serviceable parts inside.
• Keep hands and other items away from hot areas of the unit during operation.
• Never clean with scouring powders or harsh chemicals.
Symbols:
WARNINGS – To help avoid personal injury
Important Notes/Cautions – from the factory
Model
G4TP1T
CAUTION: Please use
this setup procedure
before attempting to use
this brewer. Failure to follow the
instructions can result in injury or the
voiding of the warranty.
IMPORTANT: Equipment
to be installed to comply
with applicable governmental plumbing/electrical codes
having jurisdiction.
CAUTION: DO NOT
connect this brewer to hot
water. The inlet valve is
not rated for hot water.
Sanitation Requirements
This Curtis Generation 4 Unit is Factory Pre-Set and Ready to Go Right from the Box.
Following are the Factory Settings for your G4 Coffee Brewing System:
• Brew Temperature = 200°F • Water Bypass = LARGE & MEDIUM Brew Only
• Brew Volume = Set to Vessel Requirement.
System Requirements:
• Water Source 20 – 90 PSI (Minimum Flow Rate of 1 GPM)
• Electrical: See attached schematic for standard model or visit www.wilburcurtis.
com for your model.
SETUP STEPS
1. The unit should be level (left to right - front to back), on a secure surface.
2. Connect the water line to the water inlet tting on the rear of the unit. Water volume ow to the machine
should be consistent. Use tubing sized sufciently to provide a minimum ow rate of one gallon per minute.
NOTE: A water ltration system must be used to help maintain trouble-free operation. In areas with
extremely hard water, we highly recommend the use of a Curtis approved water lter. For our full line
of lters, please log on to www.wilburcurtis.com. A water ltration system will greatly prolong the life
of the unit and enhance the quality and taste of the product.
NSF International requires the following water connection:
1. A quick disconnect or additional coiled tubing (at least 2x the depth of the unit) is required so
that the unit can be moved for cleaning.
2. This unit must be installed with adequate backow protection to comply with applicable federal,
state and local codes.
3. Water pipe connections and xtures directly connected to a portable water supply shall be sized,
installed and maintained in accordance with federal, state, and local codes.
ISO 9001:2008 REGISTERED
WILBUR CURTIS CO., INC.
6913 West Acco Street
Montebello, CA 90640-5403
For the latest information go to
www.wilburcurtis.com
Tel: 800-421-6150
Fax: 323-837-2410
3. Connect the unit to electrical outlet with appropriate amperage rating (see serial tag on machine).
4. Once power has been supplied to the unit, ip the toggle switch to the ‘ON’ position (located on the rear of
the unit), the water tank will begin to ll. When the water level in the tank reaches the probe, the heating
element(s) will turn on.
5. Water in the heating tank will require approximately a half hour before reaching operating temperature
(factory setting of 200°F). Where applicable, turn on the Universal Control Module (UCM). When the unit
reaches operating temperature, it will display “READY TO BREW”.
For the latest specications and information go to www.wilburcurtis.com
1
Your Curtis G4/Gold Cup Series is Factory Pre-Set for Optimum Performance.
After connection to water and power; turn on the brewer at the rear toggle switch. You will hear a beep and the status lights will come on for a moment.
The screen will display . Next is displayed. Water will ll the tank (2-3 minutes depending on water ow rate).
MODEL NUMBER
CONTROL BD NUMBER
FILLING
When the proper level is reached will appear on the screen. It takes approximately 30 minutes to reach the set point temperature.
Control will display when temperature reaches the set point. The unit is now ready to brew.
READY TO BREW
HEATING
COFFEE BREWING INSTRUCTIONS
1. Brewer should be ON. Conrm this at the toggle switch on the back of the brewer. The touch screen should read Ready to Brew.
2. Place an empty coffee container centered beneath the brew cone.
WARNING – AVOID SCALDING: USE BOTH HANDLES FOR BETTER CONTROL. The brew cone may be lled with hot coffee
grounds and is difcult to manage with one hand.
The coffee vessel is heavy when full. Take precautions to avoid dropping while moving.
3. Place a new paper lter into the brew
cone.
6. Start the brew cycle by hold your nger
on the desired brew icon. As soon as
you hear the click of the brew valve, the
brew cycle has started and you can lift
your nger.
Brew Code: You may nd that when a brew
button is pressed, a key pad appears on the
screen. This is a brew lock-out feature that
4. Fill the brew cone with the proper
amount of ground coffee.
requires a code to be entered before a brew
will start. The default is OFF.
CAUTION: When enabled, as soon as you
enter the brew code a brew cycle starts.
Refer to page 8 for more information about the
Brew Code.
5. Transfer the lled brew cone to the
brewer.
During the brew cycle, an animated 1½
gallon server icon will appear on the screen
and a brew timer will count down the time
remaining on the brew cycle.
2
Touch Screen Control Module
The touch screen turns on when power is available to the controller. The screen will contain standard control feature such as symbols and buttons. Press-
ing these elements with your nger tip will activate the programming functions. The default screen, as well as some added control buttons are shown in the
illustration below.
STATUS LIGHTS
BREW BUTTONS
CURTIS LOGO
TO ENTER PROGRAMMING
Tap Curtis logo 5 times to bring
up the ACCESS CODE screen.
CONTROL SYMBOLS
All of these symbols may not
be visible at one time.
RETURN TO HOME SCROLL RETURN TO PREVIOUS
PROGRAMMING
ACCESS CODE screen. Default is 1 2 3 4.
Once the code is entered, press OK. The
Main Menu screen will appear.
The access code can be reset in Control
Settings, PASSWORDS.
UNDO
MAIN MENU screen contains six control icons:
RECIPES, CONTROL SETTINGS, BREW SETTINGS,
MODEL SELECT, SETTINGS SUMMARY and EXIT.
PROGRAMMING Continued . . .
3
Menu Tree
This chart explains how to enter the program mode and menu selections available from the MAIN MENU.
4
Menu Features
5
Menu Features
Brew Settings
6
System Fault Messages
7
Brew Access Code
8
USB – Easy Programming
There are two methods that can be used to change the default settings on G4 brewers. They can be programmed at the brewer by
the touch screen universal control module (UCM) or the settings can be changed using the USB (Universal Serial Bus) data port
on the side of the brewer. Using the USB connection and a ash memory data storage device will easily reprogram the settings
simply by copying data.
The ash drive can upload or download the entire setting from one G4 brewer, into another G4
brewer. This eliminates the need to walk through the usual steps in reprogramming that would
be required when you use the touch screen to make a change. This is an advantage for a
service technician when standardizing the program settings on multiple G4 brewers.
Use a USB drive with USB 2.0 support and a type-A USB connection. Storage capacity should
be 2 GB minimum (reference the illustration on page 2).
IMPORTANT: The ash drive must be completely blank. Before starting, please erase any les that may be in the USB drive.
SOFTWARE INFORMATION TRANSFER
UPLOAD TO USB
1. Make sure the brewer is on. Determine that the G4 brewer you wish to copy is properly programmed for your desired settings.
2. Connect an empty ash drive into the USB port on the brewer. The UCM on the brewer will upload all of the particular setup
data onto the ash drive. The yellow LED on top of the touch screen will light indicating that data is transferring. This will only
take a second to complete.
DOWNLOAD TO BREWER
1. Select the brewer you wish to make the program changes on. The brewer should be on.
2. Plug the loaded ash drive into the USB port on the brewer. The data copied from the rst G4 brewer will automatically download, overwriting all the settings that were on the second brewer.
3. The red LED on the UCM will indicate that the download is in process. This will only take a second.
4. Once the download is complete, the UCM will reboot in order for the changes to take effect.
5. Remove the ash drive. The download is complete. The data on the ash drive can be downloaded into as many G4 brewers
as needed.
9
USB – File Transfer
This screen will be presented whenever the USB ash is inserted, as long as UCM is showing main brew screen and is not currently brewing.
The default action is ‘No action’.
The UCM will always create a backup on the USB ash drive before downloading settings/recipes or screen saver.
If a rmware update le is present on the USB ash, the rmware update procedure will be started BEFORE this screen is shown.
Case 1: Settings/recipes le
present, screen saver not pres-
ent. User has selected ‘Download from USB’ for settings/
recipes le.
Case 2: As above, but user has
selected ‘Upload to USB’ for settings/recipes le.
With this action, the overwrite
warning appears.
10
Illustrated Parts
Main View
1
2
3
11
12
13
4
14
5
6
7
8
10
9
ITEM NO. PART NO. DESCRIPTION
1 WC-5459 COVER, TOP WRAP
2 WC-37121* KIT, DUMP VALVE LEFT
3 WC- 844-101* VALVE, BYPASS 120V-14W NON ADJUSTABLE w/RESTRICTOR (WC-2945)
4 WC-3417 BREW CONE,ASSY W/SPLASH POCKET BRWN STYLIZED HOT COFFEE
5 WC-1825 FAUCET ASSY, HOT WATER
6 WC-14045-101* CURRENT SENSOR ASSY G4
7 WC-8559 RELAY, SOLID STATE 40A w/INTEGRATED HEAT SINK
8 WC-3503 * LEG, 3/8”-16 STUD SCREW BUMPBER
9 WC-3518 * LEG, GLIDE 3/8”-16 STUD SCREW
10 WC-58037-102 COVER, CENTER WRAP
11 WC-5983-101 PANEL, TOP WRAP BACK
12 WC- 847 * VALVE, INLET 2GPM 120V-10W
13 WC-1501 FUSE, HOLDER ASSY w/5A FUSE
14 WC- 102 * SWITCH, TOGGLE NON-LIT SPST 15A 125/250VAC RESISTIVE
11
Illustrated Parts
Top Wrap
15
16
17
18
19
20
21
22
23
24
ITEM NO. PART NO. DESCRIPTION
15 WC-2977-101K* KIT, SPRAYHEAD FITTING PLASTIC
16 WC-43089* GASKET, 1.00”OD x .625” I.D. x .030” THK RED SILICONE 40 SHORE
17 WC- 442 * SOLENOID, LOCK BREW CONE RIGHT 120VAC
18 WC-37122* KIT, DUMP VALVE RIGHT
19 WC- 589-101 TRANSFORMER, 120VAC-24VAC 4.8VA W/TERMINALS
20 WC-13450 HARNESS ASSY, COMPLETE G4TP2T/G4GEMT/G4GEMTIF
21 WC-10000 CONTROL MODULE, TOUCH SCREEN G4
22 WC-4212-02* NUT, 5/8-18 JAM PLASTIC-ULTEM
23 WC-29050* SPRAYHEAD ASSY, AFS-AMBER
24 WC-10008 UNIVERSAL HOST ADAPTER (USB)
* RECOMMENDED PARTS TO STOCK
12
Illustrated Parts
Heating Tank
25
26
27
28
29
30
31
32
33
34
35
36
ITEM NO. PART NO. DESCRIPTION
25 WC-37008* KIT, TANK LID ROUND
26 WC-43067* O-RING, 4-1/2 I.D. x Ø.285 C.S. SILICONE
27 WC-37266* KIT, FITTING TANK OVERFLOW (8MM)
28 WC-5502-01* KIT, PROBE, ASSY WATER LEVEL W/HEX FITTING, O-RING & NUT
29 WC-37317* KIT, STRAIGHT FITTING & BUSHNG (8MM)
30 WC-37357* KIT, STRAIGHT PLASTIC FITTING KIT, STRAIGHT PLASTIC FITTING
31 WC-62033 TANK, COMPLETE GEMTS W/ULTEM FITTINGS
32 WC- 934-04* KIT,ELEMENT HEATING 2.5KW 220V W/ JAM NUT & SILICONE WASHERS
33 WC-1438-101* SENSOR, TEMPERATURE TANK
34 WC- 522 * THERMOSTAT, HI LIMIT HEATER DPST 277V-40A
35 WC-4382* GUARD, SHOCK (HEATING ELEMENT
36 WC-43055* GUARD, SHOCK RESET THERMOSTAT
* RECOMMENDED PARTS TO STOCK
13
Illustrated Parts
38
39
37
40
ITEM NO. PART NO. DESCRIPTION
37 WC-10001* UNIVERSAL POWER MODULE - G4
38 GEM-6 * FILTER, 500PK GEM-12/230A
39 WC-5310* TUBE, 5/16 ID x 1/8W SILICONE
40 WC-5350* TUBE, SILICONE Ø1/2” ID x Ø3/4” OD x 1/8” WALL
Rough-In Drawing
* RECOMMENDED PARTS TO STOCK
14
Electrical Schematic
ThermoPro 1 Gallon Twin G4TP1T-10
15
Cleaning the ThermoPro
Regular cleaning and preventive maintenance is essential in keeping your coffee brewer looking and working like new.
To clean the coffee brewer and components, prepare a mild solution of dish washing detergent and warm water.
CAUTION – Do not use cleansers, bleach liquids, powders or any other substance containing chlorine. These products promote corrosion and will pit the stainless steel. USE OF THESE PRODUCTS WILL VOID THE WARRANTY.
DAILY CLEANING
1. Wipe exterior surfaces with a damp cloth, removing spills and debris.
2. Slide the brewcone out and clean it. Wipe the sprayhead area with a cloth soaked in a mild detergent solution.
3. Rinse with a cloth soaked with clean water. Dry the brewcone and sprayhead area.
4. Drain drip trays of coffee. Water rinse.
5. Dry the tray.
WEEKLY CLEANING
1. Reach behind the brewer and turn off the power at the toggle switch. Allow the brewer to cool.
2. Clean the sprayhead and dome plate area.
a. Remove the sprayhead, unscrewing counterclockwise from the dome plate.
b. Thoroughly clean and rinse the dome plate area.
c. Clean the brewcone rails with a brush soaked with a mild detergent solution. Rinse the area with a cloth
soaked with clean water, removing any residual detergent.
d. Dry the area.
c. Attach the sprayhead.
Liquid Level Probe
Cleaning intervals for the probe are to be determined by the user or the service
tech, based on water conditions. The use of water lters, or the type of water lter
that is being used can impact the service interval. Intervals can be from one month
to several years, however, replacing rather than cleaning the probe is preferable.
WARNING: Disconnect electrical power before removing access panels!
This procedure involves working with hot water and hot surfaces!
1. Unplug the power cord and shut off the water line.
2. Remove the top cover of the unit. Locate the top of the tank and remove the
cover.
3. Drain the tank to a level about 3” below the tip of the probe.
4. Allow some time for the probe to cool before working on the
brewer.
5. Clean the tip of the probe using a Scotch-BriteTM scuff pad.
6. If a residual white layer is still visible on the probe, remove the
probe and soak it in vinegar or a scale removing chemical. Repeat this step until the white layer is removed.
7. When assembling the probe back onto the tank, make sure the
tip of the probe is pointing downward as illustrated.
LIQUID LEVEL PROBEHEATING TANK
16
Cleaning the Thermoserver
1. Drain coffee from the server.
2. Fill the liner with a mild detergent solution and let it stand for 10 to 15 minutes.
3. After about 15 minutes take a sponge brush and scrub out the stainless steel liner.
4. When clean, drain out the soapy solution from the server.
5. Fill the server with clean water to rinse detergent from inside the unit. Repeat this rinsing until the water runs clear.
CLEANING OF THERMOSERVER FAUCET
1. Remove the faucet handle assembly. Take hold of the bonnet and turn counterclockwise to unscrew it from the
faucet.
2. Clean the handle assembly with a mild detergent solution. When clean, rinse the handle with water. Inspect for
cracks or tears in the seat cup. Replace if damaged.
3. Clean the coffee level gauge glass.
a. Remove the sight glass cover by pulling up and off from the front of the server.
b. Using the narrow brush provided for this purpose, brush out the inside of the glass with a
detergent solution. Rinse the sight glass tube of all detergent residue.
c. Pay special attention to the small gauge glass liquid level hole on the body of the faucet. You
can brush this out with a small pipe cleaner.
d. Replace the sight glass. Make sure the top and bottom silicone seals are seated.
17
Product Warranty Information
The Wilbur Curtis Company certies that its products are free from defects in material and workmanship under normal use. The following limited
warranties and conditions apply:
3 Years, Parts and Labor, from Original Date of Purchase on digital control boards.
2 Years, Parts, from Original Date of Purchase on all other electrical components, ttings and tubing.
1 Year, Labor, from Original Date of Purchase on all electrical components, ttings and tubing.
Additionally, the Wilbur Curtis Company warrants its Grinding Burrs for Forty (40) months from date of purchase or 40,000 pounds of coffee,
whichever comes rst. Stainless Steel components are warranted for two (2) years from date of purchase against leaking or pitting and replacement parts are warranted for ninety (90) days from date of purchase or for the remainder of the limited warranty period of the equipment in which
the component is installed.
All in-warranty service calls must have prior authorization. For Authorization, call the Technical Support Department at 1-800-995-0417. Effective
date of this policy is April 1, 2003.
Additional conditions may apply. Go to www.wilburcurtis.com to view the full product warranty information.
CONDITIONS & EXCEPTIONS
The warranty covers original equipment at time of purchase only. The Wilbur Curtis Company, Inc., assumes no responsibility for substitute replacement parts installed on Curtis equipment that have not been purchased from the
Wilbur Curtis Company, Inc. The Wilbur Curtis Company will not accept any responsibility if the following conditions are not met. The warranty
does not cover and is void under the following circumstances:
1) Improper operation of equipment: The equipment must be used for its designed and intended purpose and function.
2) Improper installation of equipment: This equipment must be installed by a professional technician and must comply with all local electrical,
mechanical and plumbing codes.
3) Improper voltage: Equipment must be installed at the voltage stated on the serial plate supplied with this equipment.
4) Improper water supply: This includes, but is not limited to, excessive or low water pressure, and inadequate or uctuating water ow
rate.
5) Adjustments and cleaning: The resetting of safety thermostats and circuit breakers, programming and temperature adjustments are the
responsibility of the equipment owner. The owner is responsible for proper cleaning and regular maintenance of this equipment.
6) Damaged in transit: Equipment damaged in transit is the responsibility of the freight company and a claim should be made with the carrier.
7) Abuse or neglect (including failure to periodically clean or remove lime accumulations): Manufacturer is not responsible for variation
in equipment operation due to excessive lime or local water conditions. The equipment must be maintained according to the manufacturer’s
recommendations.
8) Replacement of items subject to normal use and wear: This shall include, but is not limited to, light bulbs, shear disks, “0” rings, gaskets,
silicone tube, canister assemblies, whipper chambers and plates, mixing bowls, agitation assemblies and whipper propellers.
9) Repairs and/or Replacements are subject to our decision that the workmanship or parts were faulty and the defects showed up under normal
use. All labor shall be performed during regular working hours. Overtime charges are the responsibility of the owner. Charges incurred by
delays, waiting time, or operating restrictions that hinder the service technician’s ability to perform service is the responsibility of the owner
of the equipment. This includes institutional and correctional facilities. The Wilbur Curtis Company will allow up to 100 miles, round trip, per
in-warranty service call.
RETURN MERCHANDISE AUTHORIZATION: All claims under this warranty must be submitted to the Wilbur Curtis Company Technical
Support Department prior to performing any repair work or return of this equipment to the factory. All returned equipment must be repackaged
properly in the original carton. No units will be accepted if they are damaged in transit due to improper packaging. NO UNITS OR PARTS WILL
BE ACCEPTED WITHOUT A RETURN MERCHANDISE AUTHORIZATION (RMA). RMA NUMBER MUST BE MARKED ON THE CARTON
OR SHIPPING LABEL. All in-warranty service calls must be performed by an authorized service agent. Call the Wilbur Curtis Technical Sup-
port Department to nd an agent near you.
10/16/13 . EDR 8920 . rev NC
WILBUR CURTIS CO., INC.
6913 Acco St., Montebello, CA 90640-5403 USA
Phone: 800/421-6150 Fax: 323-837-2410
Technical Support Phone: 800/995-0417 (M-F 5:30A - 4:00P PST) E-Mail: techsupport@wilburcurtis.com
Web Site: www.wilburcurtis.com
10/2013 . F-3964 rev NC
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