Appendixes 51
10.1 Gas Conversion
This boiler is configured for Natural Gas at the factory. If
conversion to Propane Gas is required, use the conversion kit
supplied with the boiler.
WARNING
This conversion kit must be installed by a qualified service
agency* in accordance with 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.
Tools Required:
●
Phillips Screwdriver
●
Flathead Screwdriver
●
5
/
32
in or 4 mm Allen Wrench
●
Combustion Analyzer or Dual Port Manometer
●
Gas Leak Detector
Included Items:
●
Gas Orifice (refer to below table)
Model
NG
LP
NCB-24LSWE
Ø4.80
Ø3.80
NCB-28LSWE
Ø6.10
Ø4.50
NCB-34LSWE
Ø6.10
Ø4.50
NCB-40LSWE
Table 1. Orifice Size
●
Gas Pressure and Conversion Kit Number Labels
Procedure:
1. Turn off both gas and water supply to the boiler.
2. Using a Phillips screwdriver, remove two screws (one at the
left bottom and one at the right bottom) of the front cover
assembly to gain access to the internal components. See
Figure 1 for illustration of the front cover on the unit.
Figure 1. NCB LSWE Series Front cover
3. Remove the front cover and place it in a safe location to
prevent accidental damage.
4. Label all the wires on the PCB.
5. Disconnect all the wires.
10. Appendixes
