Appendices 85
12.1 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
minimises the risk of fire or explosion or to prevent property
damage or personal injury. 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 Analyser or Dual Port Manometer
●
Gas Leak Detector
Included Items:
●
Gas Orifice (refer to below table)
Model
G20
G31
NCB700-2S+/42K
Ø4.4/Ø6.4
Ø3.65/Ø3.95
NCB700-3S/54K
Ø4.8/Ø7.5
Ø4.0/Ø5.65
Table 1. Orifice Size
●
Gas Pressure and Conversion Kit Number Labels
Procedure:
1. Turn off both gas and water supply to the boiler.
2. Unfasten the 2 latches (at the top) and remove 2 screws (at
the bottom) to remove the front cover to gain access to the
internal components. See Figure 1 for illustration of the front
cover on the unit.
Figure 1. NCB700 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.
6. Loosen the five screws indicated in the figure.
12. Appendices
