Appendixes; Gas Conversion - Navien NCB-150E Installation & Operation Manual

11. Appendixes

11.1 Gas Conversion

This boiler is configured for Natural Gas from the factory. If
conversion to Propane Gas is required, the conversion kit supplied
with the boiler must be used.
WARNING
This conversion kit shall 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
/ in or 4mm Allen Wrench
5
32
Combustion Analyzer or Dual Port Manometer
Gas Leak Detector
Appendixes
64
Included Items:
Gas Orifice (refer to below table)
NG
Model
1STAGE 2STAGE
NCB-150E
Ø5.10
NCB-180E
Ø4.80
NCB-210E
Ø6.10
NCB-240E
Ø6.10
Table 1. Orifice Size
Gas Pressure and Conversion Kit Number Labels
Procedure:
1. Turn off both gas and water supply to the boiler.
2. Unclasp the 3 buckles that fix the cover to the boiler, and then
remove the cover by lifting it and pulling it outward. See Figure
1 for illustration of the front cover on the unit.
1
1
Figure 1. NCB-E Series Front cover
3. Once the front cover is removed, place it in a safe location to
prevent accidental damage.
4. Label all the wires on the PCB.
5. Disconnect all the wires.
LP
1STAGE 2STAGE
Ø5.80 Ø4.10 Ø4.50
Ø5.95 Ø3.80 Ø4.70
Ø6.30 Ø4.50 Ø4.80
Ø6.30 Ø4.50 Ø4.80
2
3