Wilbur Curtis Company, inC.
Service Manual – WB5GT Water Boiler
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 opens service panels. There are no user service-
able 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
Sanitation Requirements
Models Included
• WB5GT
CAUTION:
Equipment must be
installed to comply
with applicable federal, state,
and local plumbing/electrical
codes.
CAUTION: Follow
this setup procedure
before attempting
to use this unit. Failure to
follow these instructions can
result in injury and/or void of
warranty.
CAUTION: DO NOT
connect the unit to
hot water supply.
The inlet valve is not rated for
hot water.
INSTALLATION
This Curtis unit is pre-set and ready to go from the factory.
System Requirements:
• Water Supply 20 – 90 PSI (MINIMUM FLOW RATE of 2 GPM)
• Electrical: See electrical schematic.
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 going to the machine
should be consistent. Use tubing sized sufciently to provide a minimum ow rate of two gallons per
minute.
NOTE:Awaterltrationsystemmustbeusedtohelpmaintaintrouble-freeoperation.Air must be
purged from the cartridge prior to connection to equipment. Inareaswithextremelyhardwater,we
highlyrecommendtheuseofaCurtisapprovedwaterlter.Forourfulllineoflters,pleaselogonto
www.wilburcurtis.com.
NSF 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. Thisunitmustbeinstalledwithadequatebackowprotectiontocomplywithapplicablefederal,
state and local codes.
3.Waterpipeconnectionsandxturesdirectlyconnectedtoaportablewatersupplyshallbesized,
installed and maintained in accordance with federal, state, and local codes.
ISO 9001:2008 REGISTERED
WILBUR CURTIS CO.
6913 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 will turn on.
5. Water in the heating tank will require 60 to 70 minutes before reaching operating temperature (factory
setting of 204°F).
Forthelatestspecicationsandinformationgotowww.wilburcurtis.com
Technical support: 1-800-995-0417 M-F 5:30am-4:00pm pst
Email: techsupport@wilburcurtis.com
1
PROGRAMMING
UNIVERSAL CONTROL MODULE (UCM)
A FUNCTION
1. Press TEMP button for 1 second to check the set point
temperature.
2. Press TEMP button for 3 seconds to enter heating tank
temperature programming mode. The temperature in the
heating tank is adjustable from 140º to 210º F.
To change temperature setting:
a. Press to increase at 2º increments.
b. Press to decrease temperature.
c. Press to set and exit programming.
READY
ON/OFFTEMP AERATION
B FUNCTION
1. Press the AERATION button to pump air through the water in the heating tank.
2. Aerator pump will run as long as you hold down the button. Release button to stop.
I/O FUNCTION
1. ON/OFF button. Press once to activate control panel.
2. ON/OFF button used to set and exit programming.
OTHER FEATURES
LED SCREEN DISPLAY
When the unit is on and not in programming mode, the UCM will stay on and the LED screen will
display the current tank temperature. The factory setting is 204ºF. In the UCM programming, there is
an option to change the screen display to read HOT instead of the set point temperature. You may also
change the temperature units from Fahrenheit to Celsius.
To Change the LED To Read HOT:
1. Press the left TEMP button and hold down for 5 seconds. The F will start ashing.
2. Continue holding the TEMP button, at the same time, press and hold the ON/OFF button for 5
seconds.
3. Release both buttons. The program is now changed and the LED screen will display HOT.
4. While in the HOT display, pressing the TEMP button for 1 second will display the tank temperature.
To Change the LED To Read In Celsius:
NOTE: When the LED screen is in the HOT display mode, you cannot switch between Farenheit and
Celsius. The LED screen must be in the Temperature display mode.
READY
ON/OFFTEMP AERATION
READY
ON/OFFTEMP AERATION
1. Press and hold down the TEMP button for 10 seconds. The temperature reading will change to
Celsius.
2. Release the TEMP button. The LED screen will display the temperature in degrees Celsius (default is 96ºC).
AERATOR
The aerator pump will automatically come on every 30 minutes. Aeration is factory set to run for 5 seconds. When the aeration is running, the display
shows the LED bars chasing from left to right.
ERROR CODES
ERR1=Overow.Waterlevelerror. ERR2 = Open sensor. Break in temperature thermistor circuit.
2
ILLUSTRATED PARTS LIST
1
2
3
7
4
18
19
20
21
22
23
24
25
26
27
17
31
5
8
9
10
11
12
13
33
14
6
15
16
28
PARTS LIST
30
32
29
ITEM Nº PART Nº
1
2
3
4
5
5A
6
6A
WC-58117
WC-5661
WC-43067*
WC-2948
WC- 102*
WC- 103
WC- 847*
WC- 883
DESCRIPTION
TOP COVER
LID ASSY, TANK
O’ RING, 4-1/2 I.D. x Ø.285 SILICONE
FITTING, TANK OVERFLOW NICKEL PLATED
SWITCH, TOGGLE NON-LIT SPST 25A 125/250VAC
SWITCH, TOGGLE NON-LIT DPST 25A 125/250VAC
VALVE, INLET 2 GPM 120V 10W GEN USE YELLOW BODY
VALVE, INLET 2 GPM 240V 10W
Continued on page 4
3
PARTS LIST
ITEM Nº PART Nº
7
7A
8
9
10
11
12
13
14
15
16
17
17A
18
18A
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
WC-62045
WC-62044
WC-5502-01*
WC-37266
WC- 934-04*
WC-1438-101*
WC-4382*
WC-43055
WC- 522*
WC-5231*
WC-5310*
WC- 718*
WC- 719*
WC-1048-101*
WC-1009-101
WC-39610
WC- 794*
WC-39602
WC-1939
WC-1813*
WC-1906*
WC-1800HW*
WC-1903
WC-1955
DTP-08
WC-61549
WC-3518*
WC-8559*
WC-3503*
WC-2401
DESCRIPTION
TANK, COMPLETE WB5GT63
TANK, COMPLETE WB5GT19
KIT, PROBE, ASSY WATER LEVEL W/FITTING, O-RING & NUT
KIT, FITTING TANK OVERFLOW
HEATING ELEMENT, 220V 2500W
SENSOR, TEMPERATURE TANK
GUARD, SHOCK HEATING ELEMENT DOUBLE
GUARD, SHOCK RESET THEMOSTAT
THERMOSTAT, HI LIMIT HEATER CONTROL DPST 277V 40A
COMPOUND, SILICONE 5 oz
TUBING, 5/16” ID X 1/8” W SILICONE
TRANSFORMER, 120VAC-12VAC
TRANSFORMER, 240/120VAC-12VAC
PUMP, ASSY AGITATION WB5GT
PUMP, AGITATION 220V W/CAPACITOR & TERMINALS
LABEL, FRONT OUTER
CONTROL MODULE, 120V MINI WB
LABEL, MUCM CONTROL PANEL
NUT, FLANGED
WASHER, 1⅛” O.D.
C’ RING, .917 x .760 x .090
SHANK, FAUCET PLAIN W/NUTS
NUT, UNION SHANK
SHANK, FAUCET PLAIN
DRIP TRAY ASSEMBLY
COVER, SIDE ACCESS
LEG, GLIDE 3/8”-16 STUD SCREW
RELAY, SOLID STATE W/INTEGRATED HEAT SINK
LEG, 3/8”-16 STUD SCREW BUMPER
ELBOW, 3/8 NPT x 1/4 FLARE PLTD
* SUGGESTED PARTS TO STOCK
4
ELECTRICAL SCHEMATIC 120/220V SINGLE PHASE
5
ELECTRICAL SCHEMATIC 220V THREE PHASE
6
WALL MOUNT OPTION
Curtis can provide and optional wall mount assembly that allows you to
place your Curtis water boiler against a wall surface. The water boiler may
be mounted with the faucet facing in either direction. The kit requires some
assembly.
To order the wall mount kit, request Curtis part number WC-37347; to be
used on water boiler units WB5GT.
CLEANING
Regular cleaning and preventive maintenance is essential in keeping your water heater looking and working like new. To clean the
water heater unit and components, prepare a mild solution of 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 cloth soaked with a mild detergent solution. Wipe off any spots, dust, spills, or debris.
2. Rinse the area with a cloth soaked with clean water, removing any residual detergent.
3. Dry the area.
4. If a drip tray is used, dump out the water and clean inside the tray. Remove the screen and wash.
5. Dry the tray.
6. Rub a stainless steel polish on the outside surfaces to protect the cabinet.
WB5GT ROUGH-IN DRAWING
7
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 accord ing 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 Support Department to nd an agent near you.
ECN 15688 . 3/19/14@11.8 . rev L
ECN 15719 . 3/11/14 @ 9.6 . Rev K
ECN 15220 . 7/31/13 @ 15.8_Rev j
ECN 13852 . 2/21/12@10.7
ECN 13355 . 7/20/11@14.9
ECN 13065 . 3/30/11@10.0
ECN 13026 . 3/9/11@16.0
ecn 10504 . 7/13/9 @ 13.8
ecn xxx . 8/20/8 @ 13.1
ecn 9868 . 7/18/8 @ 15.3
ECN 9068 . 10/16/7 @ 15.5
EDR 4964 4/27/7 @ 10.3
8
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
FOR THE LATEST SPECIFICATION INFORMATION GO TO WWW.WILBURCURTIS.COM
4/2014 . F-3549 rev L
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