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GEM-120A Satellite Brewer Instructions
GEMINI COMMERCIAL COFFEE
BREWING SYSTEMS
CONTENTS
Unpacking . . . . . . . . . . .
Function of Gemini . . . .
Setup . . . . . . . . . . . . . . . .
Timer Adjustment . . . . . .
Care & Maintenance .
Trouble Shooting . . . . . .
Parts List Gem 3 & 5 . . . .
Parts List Gemini 120A . .
Wiring Diagrams
Gemini 120A -10 . . . .
Gemini 120A -63 . . . .
Warranty . . . .
Back Cover
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10
1
1
1
2
2
3
5
6
9
C
ISO 9001 REGISTERED
5/23/00. 8.9 f-1903.p65.p1X
WILBUR CURTIS COMPANY
Montebello, CA 90640
FOR THE LATEST SPECIFICATIONS AND INFORMATION GO TO
WWW.WILBURCURTIS.COM
Page 2
INSIDE FRONT COVER IS A BLANK PAGE
Page 3
GEMINI 120A
UNPACKING
All products manufactured by the Wilbur Curtis Company are thoroughly inspected at the factory
and are warranted to be free of all defects or faulty workmanship. The Gemini unit is packaged for
maximum protection while being shipped.
Make sure the shipping carton is not damaged
or punctured. Unpack the carton carefully,
inspecting the contents for any damage that
may have occurred in transit. Report any
damage immediately to the freight company.
E
D
B
G
F
H
be used at any time without interrupting the brew cycle. A warmer element, H, keeps the coffee in
the Satellite at the proper temperature.
NOTICE
This brewer must be installed by a professional licensed technician and must comply with all local
electrical, mechanical and plumbing codes having jusrisdiction. Wilbur Curtis Company will not
accept any responsibility if these conditions are not met. This machine must be used for it's intended purpose and the function for which it was designed.
A
C
FUNCTION OF THE GEMINI
The water in the heating tank A, is maintained
at the same level at all times by a sensor
called the water level probe B. This controls
the water inlet valve C.
When the brew switch is pushed, a brew cycle
starts: The dump valve D, is opened by the
brew timer E, allowing hot water to be sprayed
over the ground coffee for a specific time
period .
Brewed coffee then pours from the brew cone
F, into the Satellite.
The hot water faucet G, dispenses hot water
for tea, instant beverages, or soups and can
SETUP INSTRUCTIONS
1. Locate a position for the Gemini 120A on a firm and level, counter top.
2. Remove the top cover of the brewer and lid from the heating tank. Hand fill the tank until the
water level is approximately two (2) inches below the probe tip.
3. A 1/4" female flare fitting is required for water supply. Connect the water line to the inlet valve
fitting and turn on the water.
4. With the top cover removed, turn thermostat stem clockwise until it stops.
5. Plug the unit into a power supply outlet and turn toggle switch on. Turn ON/OFF switch to ON
position. Make sure water is flowing into the heating tank. Filling should stop when the water
level reaches the probe tip. When this is verified, replace both tank lid and top cover to the
machine.
6. Allow 15 to 20 minutes for the water in the tank to reach brewing temperature. The
BREW READY light will come on when it reaches the correct temperature.
- 1 -
Page 4
GEMINI 120A
ADJUSTMENT INSTRUCTIONS FOR TIMER WC-603RDS
The Gemini 120A now has a new timer which
was introduced starting from serial number
14866. It is a new, improved version of the
previous WC-603 RD timer. The wiring on
this has remained exactly as on the older
versions to make retrofitting easier.
The timer is mounted inside the upper compartment with the brew selector knob protruding from the center of the front panel (see
illustration, left). The brewer is designed to
brew 24 cups (one gallon maximum). Adjustment of the timer is made on the timer calibration dial. The knob indicator must be set at
the 480 second mark on the dial. On the front
panel, the brew selector switch should be at
2. This setting will deliver one gallon of water
(brew 24 cups) per brew cycle. To brew 12
cups, simply turn the brew selector knob to 1.
If finer adjustments are needed, rotate timer knob to the right to increase the brew time, rotate to
the left to decrease the brewing time.
CARE AND MAINTENANCE OF THE GEMINI 120A
Regular cleaning and preventive maintenance is essential in keeping your Gemini Coffee Brewer
looking and working like new.
WARNING Do not use cleansers, liquids, bleaches, or powder that contain chlorine.
These products cause corrosion and pitting on stainless steel and will void your warranty.
PREVENTIVE MAINTENANCE:
1. Remove the sprayhead from the Gemini 120A and clean once a week or more often in heavy
lime areas.
2. Clean the faucet seat cups twice a week and replace when they are cracked or leaking.
3. Periodic temperature checks or adjustment of thermostat by authorized personnel.
CLEANING
To maintain optimum coffee flavor, the Gem 3 Satellite should be cleaned daily after the last batch
of coffee is used. We recommend the use of urn cleaning powder or Scotch Bright pads for cleaning inside the coffee container.
The outside of the brewer and Satellite should be cleaned with a soft cloth and stainless steel
polish only, to prevent scratching the surface.
Deliming of the heating tank should be done every six (6) months; more often in heavy lime areas.
- 2 -
Page 5
GEMINI 120A
TROUBLE SHOOTING
PROBLEM: WATER DOES NOT FLOW INTO HEATING TANK
POSSIBLE CAUSE
1. Water line turned off or
filter clogged up.
2. Water inlet valve coil
burned out
3. Grounded probe (item
#12)
4. Defective or burned out
water level control board
(item #3)
SOLUTION
Open the water line and make sure water flows to the brewer.
Turn off brewer. Disconnect wires from water inlet coil terminals
and connect a power cord to the terminals. Plug cord into a 110v
outlet and verify that water flow when plugged in and stops when
cord is disconnected. If valve does not respond to this test, replace
the valve.
When water in the heating tank is below the probe tip, yet water is
not refilling, pull the wire off the probe terminal. If water starts flowing
into the tank, find ground, clean or replace the probe.
Pull the wire from the probe terminal. With a volt meter, check the
voltage at the water inlet coil terminals. This should read 110 to 115
volts. If no voltage is present, check the water level control board.
Make sure that the back of the board is grounded securely to the
mounting bracket. Check for loose wire connections. Replace
board.
PROBLEM: WATER IN HEATING TANK OVERFLOWING
POSSIBLE CAUSE SOLUTION
5. Defective water inlet
valve (item #28)
6. Probe limed up (item #12)
7. Loose or ungrounded
water level control board
(item #3)
PROBLEM: WATER IN TANK DOES NOT GET HOT OR WATER TEMPERATURE TOO LOW
POSSIBLE CAUSE
8. Thermostat is off (item #31)
9. Burned out heating
element.
Turn power off and observe the water level in the heating tank. If
water continues to flow in, clean or replace the valve.
Pull wire off from probe terminal. Touch the water tank shell with the
terminal at the end of this wire. If water stops flowing, clean or
replace the probe.
If probe is okay, check the water level control board. The water level
control board must be securely grounded. Check for loose connections. Check for voltage at the inlet valve terminals. Replace board.
SOLUTION
Check the thermostat (item #31) to make sure it is in the ON position. Turn the thermostat stem clockwise until it stops.
Check element for continuity and/or check with clamp ammeter. This
should show a reading of approximately 15 amps. If no power is
going through element, replace it.
- 3 -
Page 6
GEMINI 120A
PROBLEM: WATER IN TANK DOES NOT GET HOT OR WATER TEMPERATURE TOO LOW
POSSIBLE CAUSE
10. Defective thermostat
PROBLEM: WATER NOT FLOWING FROM SPRAYHEAD.
POSSIBLE CAUSE
11. Water level is too low
in heating tank
12. Defective brew switch
(item #41)
13. Defective timer (item #2).
Thermostat may be cutting off before the water temperature reaches
operating temperature. Do not try to reset the thermostat. Replace it.
Check water level in tank. If water is not flowing into the tank, review
steps 1 thru 4, previous page.
Check the continuity between terminals 5B and 4B when the BREW
switch is pressed. If there is no continuity, replace the switch.
Make sure the timer is receiving 110 to 120 volts. You can verify this
by taking a reading with your meter at the end of the YELLOW wire
on terminal 5B of the ON/OFF switch and at terminal A of the timer.
When the timer is activated by the brew switch, you should read
110 to 120 volts across terminals 6 and A of the timer. The RED
wire on terminal 6 supplies power to open the dump valve. If no
voltage is present, replace the timer.
SOLUTION
SOLUTION
14. Burned out dump valve
coil (item #34)
If the timer works when the brew switch is pressed, then check the
dump valve using a voltmeter on the terminals. If it shows 110 to
120 volts but no water flows through the valve, clean out the valve or
replace the coil.
- 4 -
Page 7
ILLUSTRAILLUSTRA
ILLUSTRA
ILLUSTRAILLUSTRA
TED PTED P
TED P
TED PTED P
ARAR
TS BREAKDOWN GEM-3,TS BREAKDOWN GEM-3,
AR
TS BREAKDOWN GEM-3,
ARAR
TS BREAKDOWN GEM-3,TS BREAKDOWN GEM-3,
6
7
-5, -5,
-5,
-5, -5,
-8 -8
-8
-8 -8
5
INDEXINDEX
INDEX
INDEXINDEX
NN
ºº
N
º
NN
ºº
1
2
3
4
5
5A
6
7
8
PARTPART
PART
PARTPART
NN
ºº
N
º
NN
ºº
GEM-5
WC-1201
WC- 114R
GEM 3
WC-3307
WC-5622
WC-2102
WC-2010C
WC-2025
8
11
SATELLITE WARMER STAND,115V . . . . .
POWER CORD 6’ 18/3 BLK . . . . . . . . . .
SWITCH, ROCKER 120V RED . . . . . . . . .
SATELLITE SERVER 1½ GAL . . . . . . . .
LID GEMINI SATELLITE . . . . . . . . . . .
LID, SATELLITE PLASTIC GEM3 (OPTIONAL)
GAUGE GLASS ASSEMBLY, 8” C . . . . . .
SHIELD, 8 INCH GAUGE GLASS . . . . . . .
GAUGE GLASS, 8 INCH . . . . . . . . . . .
12
10
DESCRIPTIONDESCRIPTION
DESCRIPTION
DESCRIPTIONDESCRIPTION
17
14
13
9
1
3
NN
N
NN
10
11
11A
12
13
14
15
PARTPART
PART
PARTPART
ºº
º
ºº
9
WC-2007
WC-1901
WC-1800
WC-1841
WC-3705
GEM 4
WC-3503
WC-37102
NN
ºº
N
º
NN
ºº
BRACKET, GAUGE GLASS FORMED . . . . .
SHANK, FAUCET D&T CHROME . . . . . .
FAUCET S’ NONLOCKING . . . . . . . . .
FAUCET, "ESP" BLACK NONLOCKING (OPTIONAL)
KIT FAUCET
SATELLITE STAND . . . . . . . . . . . . .
LEG, SCREW BUMPER 3/8"-16 STD . . . .
KIT, WARMER ELEMENT 100W 120VAC . . . .
INDEXINDEX
INDEX
INDEXINDEX
4
DESCRIPTIONDESCRIPTION
DESCRIPTION
DESCRIPTIONDESCRIPTION
S’S’
S’ SERIES . . . . . . . . . . .
S’S’
2
15
Wiring Diagram Gem -5 & -8
WARMER ELEMENT
WHITE
RED
WARMER
SWITCH
120 Volts, 90 Watts
BLACK
5B 4B
3A
WHITE
- 5 -
POWER CORD
GRN
Page 8
GEMINI 120A Parts List
29
26
18
30
5
13
7
6
16
13
15
3
10
18
11
25
8
27
28
23
B
24
17
12
9
B
1
22
15
14
4
21
19
20
31
5/23/00. 8.9 f-1903.p65.p8X
- 6 -
Page 9
GEMINI 120A Parts List
Item
Nº
1
2
3
4
5
6
7
7A
8
9
10
11
12
13
14
14A
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Part
Nº
WC-3621
WC- 603RDS
WC- 608
WC-2936
WC-5502-01
WC-3920T
WC- 904
WC- 906-04
WC-1200
WC- 826
WC- 517
WC-3763
WC- 817
WC-1809
WC- 202
WC- 203
WC- 114R
WC- 122
WC-2977-01
WC-5310
WC-5451
WC- 947
WC- 102
WC-3503
WC-3338
WC-5452
WC-5450
WC-43058
WC-3765
WC- 829
WC-37008
WC-5466
WC-3920B
Description
BREW CONE, UNIVERSAL 7 1/8" BLK PLASTIC . . . . . . . . . . . . . . . . . . . .
TIMER, BREW SELECTOR 120V GEM-120A . . . . . . . . . . . . . . . . . . . . . . .
LEVEL CONTROL, WATER 120V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPRAYHEAD, RED (.131 DIA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PROBE ASSY, WATER LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LABEL, TOP GEM 120A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELEMENT, ENVELOPE HEATING w/SCREWS GEN USE . . . . . . . . . . . . . . .
HEATING ELEMENT, 2000W, 220V W/JAM NUTS . . . . . . . . . . . . . . . . . . . .
POWER CORD, 6' 14/3 BLK SJTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VALVE, INLET 1 GPM 120V 10W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THERMOSTAT, CAPILLARY SPST 277V 22A GEN USE . . . . . . . . . . . . . . .
KIT, VALVE REPAIR FOR WC-866, WC-889, WC-816, WC-817, WC-818 . . . .
VALVE, DELTROL DUMP RIGHT 120V. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FAUCET, HOT WATER W/JAM NUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIGHT, BREW 115V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIGHT, BREW 220V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SWITCH, ROCKER 120V RED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SWITCH, ROCKER BREW 120V GREEN . . . . . . . . . . . . . . . . . . . . . . . . . . .
FITTING ASSY, SPRAYHEAD PLATED TIN NICKEL . . . . . . . . . . . . . . . . . . .
TUBE, 5/16" I.D. SILICONE GEN USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARMER DECK, NO ELEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELEMENT, WARMER 90W, 115V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SWITCH, TOGGLE SPST 25A 125/250 VAC RESISTIVE . . . . . . . . . . . . . . . .
LEG, SCREW BUMPER 3/8-16 STD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
KIT, BREW CONE W/BASKET SS 7 1/8" DELUXE BLK HANDLE (OPTIONAL)
COVER, FRONT GEM-120A/120P/230A/200R/300IL/600ILD. . . . . . . . . . . . . .
COVER, TOP D500, G230A, G120A, PTB . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLUG, DRAIN PP RED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
KIT, VALVE REPAIR (USE ON WC-825 WC-826) . . . . . . . . . . . . . . . . . . . . .
WASHER, .35 GPM .5" USE ON WC-825 . . . . . . . . . . . . . . . . . . . . . . . . . . .
LID ASSEMBLY, TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TANK, COMPLETE GEM-120A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LABEL, BOTTOM GEM-120A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAPER FILTERS
Part Number
GEM- 6
CR- 10
X
Description
FILTER FOR BREW CONE WC-3338 (500/PKG) . . . . . . . . . . . . . . . . . . . . . . . . . .
FILTER FOR BREW CONE WC-3621 (1000/PKG) . . . . . . . . . . . . . . . . . . . . . . . . . .
- 7 -
Page 10
WIRING DIAGRAM – GEM120A-10
- 8 -
VOLTAGE:
WATTAGE:
AMPERAGE:
HERTZ:
WIRES:
PHASE:
120VAC
1775
15
60
2+GND
1
Page 11
WIRING DIAGRAM – GEM120A-63
- 9 -
VOLTAGE:
WATTAGE:
AMPERAGE:
HERTZ:
WIRES:
PHASE:
120/220VAC
1775/2100
15/10
60
3+GND
1
Page 12
WARRANTY
We hereby certify that the products manufactured by the Wilbur Curtis Company, Inc., are, to thebest of our knowledge,
free from all defects and faulty workmanship.
The following warranties and conditions are applicable:
1. 1 Year Parts & Labor from Date of Purchase from Factory: This warranty covers all electrical parts, fittings
and tubing.
2. 40 Months or 40, 000 Pounds of Coffee on a set of Grinding Burrs. (ADS Grinders)
3. 3 Years from Date of Purchase: This warranty covers electronic control boards and leaking or pitting of a
stainless steel body of a Brewer or Urn.
4. 90 Days from Date of Purchase: On replacement parts that have been installed on out of warranty equipment
All in-warranty service calls must have prior authorization from the manufacturer. For an RMA (Return Merchandise
Authorization) number, call the Technical Service Department at 1-800-995-0417. The Wilbur Curtis Company will allow
up to 100 miles, round trip, per in-warranty service call.
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 these 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,
certified technician and must comply with all local electrical, mechanical and plumbing codes.
3) Wilbur Curtis Company will not be responsible for the operation of equipment at other than the
stated voltages on the serial plate.
4) 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.
5) Replacement of items subject to normal use and wear. This shall include, but is not limited to,
light bulbs, shear disks, “0” rings, gaskets, canister assemblies. whipper chambers and plates,
mixing bowls, agitation assemblies and whipper propellers.
6) Any faults resulting from inadequate water supply. This includes, but is not limited to, excessive or low water pressure, and inadequate or fluctuating water flow rate.
7) All repairs and/or replacements are subject to our decision that the workmanship or parts were
faulty and the defects showed up under normal use.
8) All labor shall be performed during regular working hours. Overtime charges are the responsibility of the owner.
9) 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.
10) All claims under this warranty must be submitted to the Wilbur Curtis Company Technical
Service Department before return of the unit to the factory.
11) All equipment returned to us must be repackaged properly in the original carton. No units will
be accepted if they are damaged in transit due to improper packaging.
12) Damaged in transit.
13) The resetting of safety thermostats and circuit breakers, programming and temperature
adjustments are the responsibility of the equipment owner.
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 center, where service is available. Call the factory
for location near you.
WILBUR CURTIS CO., INC.
6913 Acco St., Montebello, CA 90640-5403 USA
Phone: 800/421-6150
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
Fax: 323-837-2410
Printed in U.S.A. 8/20/03 F-1903 Rev B
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