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This Curtis Generation 4 System 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 = On for 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. 

Model

 G4GEMT

CAUTION:

 DO NOT 

connect this brewer to hot 

water. The inlet valve is 

not rated for hot water.

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 govern-

mental plumbing/electrical codes 

having jurisdiction.

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

For the latest specifications and information go to www.wilburcurtis.com

Technical Support: 1-800-995-0417 M-F 5:30 

a

.

m

. - 4:00 

p

.

m

. PT

Email: [email protected]

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 fire 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.

Important Safeguards/Symbols

Service Manual – G4 Gemini Twin Coffee Brewer

W

ilbur

 C

urtis

 C

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Symbols:

WARNINGS – To help avoid personal injury
Important Notes/Cautions – from the factory
Sanitation Requirements

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 backflow protection to comply with applicable federal, 

state and local codes.

3.  Water pipe connections and fixtures directly connected to a portable water supply shall be sized, 

installed and maintained in accordance with federal, state, and local codes.

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, flip the toggle switch to the ‘ON’ position (located on the rear of 

the unit), the water tank will begin to fill. 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”.

NOTE:

 A water filtration system must be used to help maintain trouble-free operation. 

Air must be 

purged from the cartridge prior to connection to equipment.

 In areas with extremely hard water, 

we highly recommend the use of a Curtis approved water filter. For our full line of filters, please log 

on to www.wilburcurtis.com.

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 fitting on the rear of the unit. Water volume flow to the machine 

should be consistent. Use tubing sized sufficiently to provide a minimum flow rate of one gallon per minute.

Summary of Contents for G4GEMT

Page 1: ...e Manual G4 Gemini Twin Coffee Brewer Wilbur Curtis Co Inc Symbols WARNINGS To help avoid personal injury Important Notes Cautions from the factory Sanitation Requirements NSF International requires t...

Page 2: ...le by hold your finger 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 finger Brew Code You may find that when a brew button i...

Page 3: ...TUS LIGHTS BREW BUTTONS CURTIS LOGO TO ENTER PROGRAMMING Tap Curtis logo 5 times to bring up the ACCESS CODE screen RETURN TO HOME SCROLL RETURN TO PREVIOUS UNDO WARMERS CONTROL SYMBOLS All of these s...

Page 4: ...e and menu selections available from the MAIN MENU Menu Tree Tap Curtis logo 5 times to enter Programming Mode When installing new control board default is Gemini Twin Three Batch Applies to Gemini mo...

Page 5: ...ements gallons 100 gallon increments this only only resettable reset to restore factory defaults US units or Metric units Maintenance interval Service telephone number MED during brewing 120 Min on GE...

Page 6: ...c Off 30 Sec On 30 Sec Off 40 Sec On 40 Sec Off 50 Sec On 50 Sec Off 60 Sec On 60 Sec Off Off 10 Sec 15 Min 10 second increments 5 Min 25 Sec 3 Min 32 Sec 1 Min 52 Sec till end of brew cycle till end...

Page 7: ...l run error overflow Open sensor Excess temperature UPM UCM communication minutes on the intial tank fill or 120 seconds on large brewers and 30 seconds on CGC brewer in Break in the UPM UCM communica...

Page 8: ...8 Tap Curtis logo 5 times to enter Programming Mode The PASSWORDS screen will Brew Access Code...

Page 9: ...Connect an empty flash drive into the USB port on the brewer The UCM on the brewer will upload all of the particular setup data onto the flash drive The yellow LED on top of the touch screen will lig...

Page 10: ...10 Illustrated Parts Main View 1 2 3 4 5 6 7 8 9 10 16 17 18 19 11 12 13 14 15 24 25 26 27 28 29 30 31 20 21 22 23...

Page 11: ...1 CURRENT SENSOR ASSY G4 14 WC 39462 LABEL BOTTOM PANEL GEMTS 15 WC 1809 FAUCET PS HSP SERIES HOT WATER 1 2 20 UNF 16 GEM 6 FILTER 500PK GEM 12 230A 17 WC 3417 BREW CONE ASSY W SPLASH POCKET BRWN STYL...

Page 12: ...KIT DUMP VALVE LEFT 32A WC 853 VALVE BREW DUMP LEFT 240V 12W GEM12D TP TPC 33 WC 442 SOLENOID LOCK BREW CONE RIGHT 120VAC 33A WC 446 SOLENOID LOCK BREW CONE RIGHT 220V THERMOPRO GEMTS 34 WC 2977 101K...

Page 13: ...13 Electrical Schematic...

Page 14: ...eaning intervals for the probe are to be determined by the user or the service tech based on water conditions The use of water filters or the type of water filter that is being used can impact the ser...

Page 15: ...8 LEG SCREW BUMPER 3 8 16 STD GEM 5 8 SWITCH ROCKER RED 120V SPST GEM 5 8 PART ITEM DESCRIPTION Recommended parts to stock Illustrated Parts List GEM 3 SATELLITE SERVER GEM 5 WARMER GEM 8 WARMER SHOR...

Page 16: ...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...

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