Included Items:
●
Gas Orifice (Table 1)
●
Gas Pressure and Conversion Kit Number Labels
NFC-175/200 Orifice Identification
Gas Type NG LP
Altitude 0-5,399 ft 5,400-10,100 ft 0-10,100 ft
Orifice
NFC-200
NG
Ø6.3/Ø6.8
NFC-200
LP
Factory Installed For High altitude
For LP
Orifice
Size
Ø6.1/Ø6.6 Ø6.3/Ø6.8 Ø4.5/Ø4.9
Table 1. Orifice Size
WARNING
●
Be careful not to confuse the LP CONVERSION KIT and HIGH
ALTITUDE CONVERSION KIT. Do NOT use the HIGH ALTITUDE
CONVERSION KIT for NG when converting to LP gas.
●
Make sure that the conversion is completed with the proper
orifice. If the installed orifice does not conform to the
specifications in Table 1, incomplete combustion may occur,
resulting in personal injury or property damage.
4.4 Gas & High Altitude Conversion
This boiler is configured for Natural Gas at the factory.
●
If conversion to Propane Gas is required by the boiler, use the LP
CONVERSION KIT supplied with the boiler.
●
If the boiler is installed at a high altitude (above 5,400 ft) for
NG, use the HIGH ALTITUDE CONVERSION KIT supplied with the
boiler.
Note
●
For NG high altitude conversion, use the HIGH
ALTITUDE CONVERSION KIT.
●
For LP high altitude conversion, use the LP
CONVERSION KIT. Note that the Gas Orifice from the
LP CONVERSION KIT covers the boiler’s installation at
an altitude of 0 to 10,100 ft.
WARNING
This conversion kit must be installed by a qualified service
agency* in accordance with Navien’s instructions and all
applicable codes and requirements of the authority having
jurisdiction. The information in these instructions must be
followed to minimize the risk of fire or explosion or to prevent
property damage, personal injury or death. The qualified
service agency is responsible for the proper installation of
this kit. The installation is not proper and complete until the
operation of the converted appliance is checked as specified in
the manufacturer’s instructions supplied with the kit.
* A qualified service agency is any individual, firm, corporation or company
which either in person or through a representative is engaged in and
is responsible for the connection, utilization, repair or servicing of gas
utilization equipment or accessories; who is experienced in such work,
familiar with all precautions required, and has complied with all of the
requirements of the authority having jurisdiction.
In Canada: The conversion shall be carried out in accordance with
the requirements of the provincial authorities having jurisdiction
and in accordance with the requirements of the CAN‐B149.1 and
CAN1‐B149.2 Installation Code.
Tools Required:
●
Phillips Screwdriver
●
Flathead Screwdriver
●
5
/
32
in or 4 mm Allen Wrench
●
Combustion Analyzer or Dual Port Manometer
●
Gas Leak Detector
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