Appendixes; Gas & High Altitude Conversion - Navien NHB Series Installation & Operation 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 LP
CONVERSION KIT supplied with the boiler.
If the boiler is installed at a high altitude above 5,400ft, use the
HIGH ALTITUDE CONVERSION KIT supplied with the boiler.
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
/ in or 4 mm Allen Wrench
32
T40 or 6.65 mm Star Wrench
Combustion Analyzer or Dual Port Manometer
Gas Leak Detector
110 Appendixes
Included Items:
Gas Orifice (Table 1)
Gas Pressure and Conversion Kit Number Labels
NFB-301C Orifice Identification
Gas Type NG
Altitude 0-5,399 ft
10,100 ft
NFB-301C
1STEP-ORIFICE
NG : 6.75
Orifice NFB-301C
1STEP-ORIFICE
NG : 9.25
Factory For High
Installed Altitude
Orifice Ø6.75 /
Size Ø9.25
NFB-399C Orifice Identification
Gas Type NG
Altitude 0-5,399 ft
10,100 ft
NFB-399C
1STEP-ORIFICE
NG : 8.35
NFB-399C
Orifice
2STEP-ORIFICE
NG : 15.1
Factory For High
Installed Altitude
Orifice Ø8.35 /
Size Ø15.1
Table 1. Orifice Size
WARNING
NG and LP high altitude conversion kits and a LP conversion
kit are provided with the boiler. Be careful not to confuse
the LP conversion kit and LP high altitude conversion kit.
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.
LP
5,400- 5,400-
0-5,399 ft
10,100 ft
NFB-301C
NFB-301C NFB-301C
1STEP-ORIFICE
1STEP-ORIFICE 1STEP-ORIFICE
NG,H : 7.40
LP : 5.4 LP
20046179A
NFB-399C NFB-301C NFB-301C
2STEP-ORIFICE 2STEP-ORIFICE 2STEP-ORIFICE
LP.H : 6.65
NG,H : 9.60
LP : 6.75
20046181A
20046180A
For Sea For High
Level Altitude
Ø7.40 / Ø5.40 / Ø5.40 /
Ø9.60 Ø6.75 Ø6.65
LP
5,400- 5,400-
0-5,399 ft
10,100 ft
NFB-399C NFB-399C
1STEP-ORIFICE 1STEP-ORIFICE 1STEP-ORIFICE
NG,H : 8.65 LP : 6.55 LP : 6.55
20046182A
NFB-399C
2STEP-ORIFICE NFB-399C NFB-399C
2STEP-ORIFICE 2STEP-ORIFICE
LP,H : 9.30
LP : 9.5
NG,H : 17.0 2046184A
20046183A
For Sea For High
Level Altitude
Ø8.65 / Ø6.55 / Ø6.55 /
Ø17.0 Ø9.50 Ø9.30
: 5.4
NFB-399C