Appendixes; Gas & High Altitude Conversion - Navien NFC-250/175H Installation Manual

12. Appendixes

12.1 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 PROPANE 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.
For NG high altitude conversion, use the
Note
●
HIGH ALTITUDE CONVERSION KIT.
For LP high altitude conversion, use
●
the PROPANE CONVERSION KIT. Note
that the Gas Orifice from the PROPANE
CONVERSION KIT covers the boiler's
installation at an altitude of 0 to 10,100 ft.
DANGER
Do not perform a gas & High Altitude conversion
without an officially approved conversion kit
and the instructions supplied by Navien. Gas
& High Altitude conversion using any other
parts will result in extremely dangerous burner
operation, leading to fire, explosion, severe
personal injury or death.
High Altitude Conversion kit and
Note
Propane Conversion kit are attached to
the inside of Product's cover.
High Altitude
Conversion Kit (a) and
Propane Conversion
Kit (b)
a. High Altitude Conversion Kit b. Propane Conversion Kit
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.
Turn off electrical supply to the boiler and
●
close the manual gas shut-off valve to isolate
the boiler during conversion. Allow the boiler
to cool if it has been operating.
For propane boilers: The propane supplier
●
mixes an odorant with the propane to make
its presence detectable. In some instances the
odorant can fade, and the gas may no longer
have an odor. Before startup (and periodically
thereafter), have the propane supplier verify
the correct odorant level in the gas.
* 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
●
/ in or 4 mm Allen Wrench
5
●
32
Combustion Analyzer or Dual Port Manometer
●
Gas Leak Detector
●
Appendixes 129