MAHLE RTI NTF-515 (Rev A) - Manual (Page 7)

OPERATION
FOREIGN SUBSTANCES IN TIRES
Tires which have been in service may contain foreign substances such as leak sealers. It is important
that these substances are not pulled into the NitroPro unit during the vacuum procedure, resulting in
possible performance issues and costly repairs not covered by RTI’s warranty.
When servicing a vehicle, first check the valve stems and valve stem caps for any type of fluid or
foreign substance. Install deflators and allow all four tires to deflate to zero pressure. Then check the
deflators for any indication of fluids or foreign substances.
Do not use the NitroPro vacuum procedure on any tire where evidence of fluids or foreign substances
are detected on the valve stems, valve stem caps or deflators. Instead, follow a four step “deflate-
inflate-deflate-inflate” process to achieve desired nitrogen purity.
NITROGEN PURITY SELECTION
NTF-515 allows an operator to select desirable purity of generated Nitrogen.
Purity selector is located in the left lower corner of the unit’s rear panel.
Turn selector knob to desirable purity before starting nitrogen generation. If
storage tank is filled with 95% pure Nitrogen, it must be fully emptied before
switching to 98% purity. To empty the tank, attach tire deflator to Nitrogen
Purity Test Port located on the front panel and release stored Nitrogen to
atmosphere.
Higher purity Nitrogen generation and vehicle service times will double if
98% pure Nitrogen is selected.
After purity is selected, NTF-515 can be used either in automatic or manual
mode.
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