© MAHLE
Nitrogen service | NTF-515B | 15
NTF-515B | 15
| 15
en
3.3
Service phases
3.3.1 Nitrogen purge cycle
y
Deflate:
Tires are deflated to 10% of the target pressure.
y
Inflate:
Tires are inflated to target pressure plus the over
pressure setting.
y
50% Deflate:
Tires are deflated to 50% of the target pres-
sure.
y
Inflate:
Tires are inflated to target pressure.
3.3.2 Nitrogen top-off
Deflate/Inflate:
Tires are either inflated or deflated to the set
target pressure.
3.4
Nitrogen purge cycle
t
Process can be used for single or multiple tires.
1.
Attach air supply (150PSI max.) to the NTF-515B.
2.
Turn on POWER switch. PCB will display battery charge status
(HI or LO). Ensure the 12VDC battery is charged. See battery
charging section for more information.
3.
Verify pressure indicated on AIR PRESSURE gauge is between
120 - 150PSI.
4.
Allow unit to build pressure in nitrogen storage tank as shown
on the lower screen (120PSI).
5.
Connect hoses to tire(s). NTF-515B unit is equipped with
four service hoses, coiled on both sides. Short (12ft) hoses
should be connected to the tire(s) closest to unit. Long (24ft)
hoses should be connected to tire(s) farthest from unit. Ensure
air chuck(s) are fully engages with valve stem(s) for proper
service.
6.
Set the final target pressure by pressing
+
or
-
buttons.
7.
Check that OPS and N2P are set to desired values.
8.
Press and hold
START
button for 2 seconds (until long beep).
This will start the Nitrogen Purge Cycle.
9.
Unit screen will display the pressure in the tire(s) throughout
the service.
10.
The unit will beep at the end of service and the word END
will appear on the top LCD.
11.
Disconnect hose(s).
t
It is recommended to wait 10-15 seconds after the end of
service prior to disconnecting hoses. This allows the tires to
fully balance pressures.
12.
Press any key to stop process.
13.
Install valve caps on the tire valve stems.
t
Nitrogen (N
2
) Valve cap kits are available for purchase through
MAHLE. See Spare and Wearing parts section of manual or call
MAHLE Technical Support/Sales to order at 1-800-468-2321
3.5
Nitrogen purge cycle
t
Process can be used for single or multiple tires.
1.
Attach air supply (150PSI max.) to the NTF-515B.
2.
Turn on POWER switch. PCB will display battery charge status
(HI or LO). Ensure the 12VDC battery is charged. See battery
charging section for more information.
3.
Verify pressure indicated on AIR PRESSURE gauge is between
120 - 150PSI.
4.
Allow unit to build pressure in nitrogen storage tank as shown
on the lower screen (120PSI).
5.
Connect hoses to tire(s). NTF-515B unit is equipped with
four service hoses, coiled on both sides. Short (12ft) hoses
should be connected to the tire(s) closest to unit. Long (24ft)
hoses should be connected to tire(s) farthest from unit. Ensure
air chuck(s) are fully engages with valve stem(s) for proper
service.
6.
Set the final target pressure by pressing
+
or
-
buttons.
7.
Check that OPS and N2P are set to desired values.
8.
Press and release
START
button (a short beep will sound).
This will start the Nitrogen Top-off routine.
9.
Unit screen will display the pressure in the tire(s) throughout
the service.
10.
The unit will beep at the end of service and the word END
will appear on the top LCD.
11.
Disconnect hose(s).
t
It is recommended to wait 10-15 seconds after the end of
service prior to disconnecting hoses. This allows the tires to
fully balance pressures.
12.
Press any key to stop process.
13.
Install valve caps on the tire valve stems.
3.6
Top-off and nitrogen purge cycle
counter
The NTF-515B will keep track of the total number of Top-offs and
Nitrogen purge cycles performed over the life of the unit.
To access this information:
1.
Press and hold
+
and
-
buttons simultaneously until unit
beeps.
2.
Screen should display Cnt (top off count) and then a number
on one screen if less than 1000 cycles. If more than a 1000
cycles, one number will be displayed (the thousands count),
followed by a screen showing the hundreds, tens, and ones
digits.
3.
Press
+
button.
4.
Screen should display CNP (Nitrogen purge count) and then
a number on one screen if less than 1000 cycles. If more than
a 1000 cycles, one number will be displayed (the thousands
count), followed by a screen showing the hundreds, tens, and
ones digits.
5.
Press
START
button to exit counter mode.
