here is the manual. it was in Portuguese language. converted it with google but even then it is confusing 
INSTALLATION AND PROGRAMMING
KEY SWITCH 094M (Carburetor) The new keyswitch 094M is designed to introduce innovative solutions in the electronics industry dedicated to cars converted to CNG. Carefully designed in order to allow easy installation and has the following functions: - Passage CNG / gasoline / CNG through a key membrane touch-key. - Safety device capable of automatically cutting power of CNG in case of accidental engine shutdown. - CNG level indicator with 5 LEDs. - Filling time from the low pressure adjustable by the installer. - Emptying the tank during the passage of the carburetor gasoline / CNG. - Filling the bowl of the carburetor during passage CNG / gasoline.
OPERATION OF LEDS
[1] 4 green LEDs and one red LED indicator will illuminate when running on CNG.
[2] Green LED (CNG), indicates the opening of the solenoid CNG reducer.
[3] Yellow LED (gasoline), indicating opening of the gas solenoid.
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TECHNICAL SPECIFICATIONS Supply Voltage: Nominal output current CNG (BLUE Wire): Nominal output current GASOLINE (YELLOW Wire): Measurements of switching: Product approved according to the following standards: Regulation R110 Regulation R10/02 R67/01 Regulation 9 ? 16 Vdc 7 A MAX. 7 The LarguraComprimento Height 53 mm, MAXIMUM. 25 mm and 38 mm To avoid runs abnormal switching should take the following precautions:
The Landi Renzo abstains from any liability for property damage or personal injuries caused by tampering with its provi-tive by unauthorized persons or by non conformity warnings displayed.
- Put the wires as far as possible switching of high voltage cables.
- Always make good connections with tin solder ultilizando. . Avoid the use of shunts.
- Is Obligatory use of higher amperage fuse.
- Do not open for any reason the switching box, especially with the engine running and the panel lit.
GENERAL WARNINGS
7.5 A. Never replace a fuse
SWITCH OPERATION
During operation with gasoline, only the yellow LED is lit. Pressing the button once, the system goes into neutral phase to empty the bowl of the carburetor and all LEDs are off. Pressing the button again, the LED will illuminate green CNG along with the level indicator LEDs and eletrov?vulas reducer shall be opened, then the vehicle will run on CNG. During operation with CNG, pressing the button, you will access the situation of filling the tank and the carburetor so the green LED, as the yellow LED will illuminate. Pressing the button again activates the operation on gasoline and only the yellow LED is lit. If starting with CNG, as they trigger the ignition (without starting the engine), takes a momentary opening of the gearbox solenoid valves for filling the low pressure and facilitate the departure with CNG. This momentary opening time can be set by the installer.
SCHEDULE SWITCH
SCHEDULE OF TIME FILLING THE LINE OF LOW PRESSURE
To modify the settings of the switching is necessary to enter the programming mode: Hold down the button switching, turn the ignition without starting the engine, hold the key to get in:
Each key press of switching is increased in a second time filling the low pressure: Green LED (CNG) and yellow LED (gasoline) deleted: Filling time zero (0 seconds) First green LED level indicator of CNG lit: 1 second filling time. First 2 LEDs green CNG level indicator lit: 2 seconds of filling time. First 3 LEDs green CNG level indicator lit: 3 seconds of filling time. First 4 LEDs Green CNG level indicator lit: 4 seconds of filling time. All green LED level indicator and green LED (CNG) lit: 5 seconds of filling time. All LEDs green and yellow LED lit: 6 seconds of filling time. VALUE IS SCHEDULED FACTORY 2 SECONDS
FIRST LED RED LEVEL INDICATOR FOR FLASHING CNG
KEEPING A TIGHT BUTTON FOR ABOUT 5 SECONDS IS HAPPENING TO SCHEDULE NEXT PARAMETER:
SCHEDULE TYPE LEVEL INDICATOR LED GREEN CNG FIRST LEVEL INDICATOR FOR FLASHING CNG
PROGRAMMING THE FILLING OF CUBA CARBURETOR SECOND GREEN LED INDICATOR LEVEL CNG FLASHING
Always keep this schedule with the green LED (CNG) lit indicating level sensor CNG (potentiometer) Landi Renzo (factory setting) ..
KEEPING A TIGHT BUTTON FOR ABOUT 5 SECONDS IS HAPPENING TO SCHEDULE NEXT PARAMETER:
Always keep this schedule with the green LED (CNG) filling indicate that lit enabled (factory programmed value).
SCHEME OF ELECTRIC SWITCH 094M
SENSOR TYPE LANDI RENZO connect the white wire to one of the two white wires from the pot.
GREEN (Not used)
WHITE
AZULVERMELHOMARROM BLACK
In 1234
FUSE 7.5 A MAX
In 1234
+12 VOLTSTERRA solenoid AFTER KEY LINE REDUCER +15
YELLOW (Not used)
Connect the brown wire or the negative pulsing coil, the tach signal (tachometer) module enrrole gasoline or 5 turns in the coil cord.
