MAHLE RTI NTF-230 - Manual (Page 7)

6
AUTOMATIC TIRE FILLING
PURGE/FILL AND TOP OFF CYCLES
1. Attach air supply (150 PSI max) to the unit.
2. Turn control valve so it is HORIZONTAL. Verify pressure indicated on AIR PRESSURE gauge
is between 120 - 150 PSI.
3. Allow unit to build pressure in nitrogen tank as shown on N
2
PRESSURE gauge (approximately
120 PSI).
4. Turn on POWER switch on control panel. PCB will display battery charge status (HI or LO).
Ensure that 12VDC battery is charged. See section on Battery charging for more information.
The NTF-230 will display a target pressure.
5. Connect hoses to tires. NTF-230 is equipped with four service hoses. The two 12 FT long
hoses should be connected to tires closest to the operator. The two 24 FT long hoses should
be connected to farthest tires on the vehicle. Ensure the air chucks are fully engaged with valve
stems for proper service (this is crucial for equal tire inflation and proper nitrogen purity).
6. Set the final target pressure (the pressure that should be in the tires) by pressing + or – buttons.
7. To change the Over Pressure and Nitrogen Purge Cycles settings, see following sections.
8. Press and hold START button for two seconds (until long beep). This will start Purge/Fill cycle.
For Top Off cycle, press START button momentarily and release it. Top Off cycle will start
immediately.
One complete Nitrogen Purge Cycle will deflate all tires to 10% of target pressure
(approximately 3 PSI for 30 PSI target), inflate to the target pressure, deflate to 50% of the
target pressure, and then inflate to the final target pressure. (If two or more Nitrogen Purge
Cycles are programmed the above process will be repeated).
9. Unit will beep at the end of service and the word END will appear on LCD.
10. Wait 10-15 seconds after the end of the service before disconnecting hoses.
11. Press any key to stop process.
12. Once service is completed, leave control valve knob HORIZONTAL to allow the tank to
replenish the supply of nitrogen. If another service is to be done immediately afterward, the
control valve knob can remain in the HORIZONTAL position. If no further services are to be
performed for an extended period of time, turn control valve knob to VERTICAL position to end
production of nitrogen. This will prolong the life of the filters.