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PROBLEM: 

 WATER NOT FLOWING FROM SPRAYHEAD.

SOLUTION

POSSIBLE CAUSE

Check water level in tank. If water is not flowing into the tank, re-

view 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 

9

 of the 

timer. When the timer is activated by the brew switch, you should 

read 110 to 120 volts across terminals 

8

 and 

9

 of the timer. The 

RED wire on terminal 

8

 supplies power to open the dump valve. If 

no voltage is present, replace the timer.

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.

11. Water level is too low  

 

   in heating tank.

12. Defective brew switch.

13. Defective timer.

14. Burned out dump valve    

 coil.

PROBLEM: 

WATER IN TANK DOES NOT GET HOT OR WATER TEMPERATURE TOO LOW

POSSIBLE CAUSE

SOLUTION

10. Defective thermostat.

Thermostat may be cutting off before the water temperature reaches 

operating temperature. Do not try to reset the thermostat. Replace it.

GEMINI 120A

Summary of Contents for GEM-120A

Page 1: ...ur 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 INSTALLATION This Curtis unit is pre set and ready to go from the ...

Page 2: ...s 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 damp cloth removing spills and debris 2 Slide the brewcone out and clean it Wipe the sprayhea...

Page 3: ...t cup Replace if the seat cup damaged 3 Clean the coffee level gauge glass a Remove the gauge glass cap unscrewing it from the top of the shield b Carefully pull out the gauge glass Brush out the inside of the glass with a detergent solution Rinse the sight glass tube of all detergent residue c Inspect the gasket seals at the top and bottom of the gauge glass Clean these gaskets d Assemble the gau...

Page 4: ...ned out 3 Grounded probe 4 Defective or burned out water level control board PROBLEM WATER IN TANK DOES NOT GET HOT OR WATER TEMPERATURE TOO LOW POSSIBLE CAUSE SOLUTION 8 Thermostat is off Check the thermostat to make sure it is in the ON position Turn the thermostat stem clockwise until it stops 9 Burned out heating element Check element for continuity and or check with clamp ammeter This should ...

Page 5: ...d 110 to 120 volts across terminals 8 and 9 of the timer The RED wire on terminal 8 supplies power to open the dump valve If no voltage is present replace the timer 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 11 Water level is...

Page 6: ... 6 GEMINI 120A Parts List 8 27 28 B 25 6 3 16 14 21 1 4 20 24 5 7 13 9 10 11 12 2 15 15 18 17 23 26 29 30 31 19 21 22 ...

Page 7: ...SY 100W 120V WITH SILICONE BOOTS SWITCH TOGGLE SPST 25A 125 250 VAC RESISTIVE LEG SCREW BUMPER 3 8 16 STD BREW CONE ASSY W SPLASH POCKET NON METAL DELUXE OPTIONAL COVER FRONT GEM 120A 120P 230A 200R 300IL 600ILD COVER TOP ALPGT D500GT D60GT TLP TCTS CBS GEMSS PLUG TANK DRAIN ULTEM 1000F KIT VALVE REPAIR USE ON WC 826 WC 826L WC 847 WASHER 35 GPM 5 USE ON WC 825 LID ASSEMBLY TANK TANK COMPLETE GEM ...

Page 8: ...ORD 6 18 3 BLK SWITCH ROCKER 120V RED SATELLITE SERVER 1 GAL LID SATELLITE PLASTIC GEM3 GAUGE GLASS ASSEMBLY 8 C SHIELD 8 INCH GAUGE GLASS GAUGE GLASS 8 INCH BRACKET GAUGE GLASS FORMED SHANK FAUCET D T CHROME FAUCET S NONLOCKING FAUCET ESP BLACK NONLOCKING OPTIONAL KIT FAUCET S SERIES SATELLITE STAND LEG SCREW BUMPER 3 8 16 STD KIT WARMER ELEMENT 100W 120VAC ILLUSTRATED PARTS LIST GEM 3 5 8 11 13 ...

Page 9: ... 9 ELECTRICAL DIAGRAM GEM120A 10 ...

Page 10: ... 10 ELECTRICAL DIAGRAM GEM120A 63 ...

Page 11: ... 11 ELECTRICAL DIAGRAM GEM 5 8 ROUGH IN DRAWING GEM 120A ROUGH IN DRAWING GEM 3 GEM 5 ...

Page 12: ...es 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 fluctuating water flow rate 5 Adjustments and cleaning The resetting of safety thermostats and circuit breakers programming and temperature adjustments are the responsib...

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