MAXFire
®
Series 100 Gas Igniters Manual
372001-04 Rev. C
6
4.2 Fuel and Air Piping
Forney recommends using the following general guidelines regarding fuel and air piping.
NOTE:
In applications for boilers with multiple igniters and burners, equal air and gas flow distribution
to each igniter are important for reliable and efficient operation. Care should be exercised in the design of
fuel and air headers to obtain uniform distribution under all flow conditions.
1.
To prevent contamination of the igniter, ensure that all fuel and air piping and hoses have been
blown free of debris and moisture. During installation, tap off the gas header from the top or side to
help prevent contamination.
2.
Install gas pressure regulators in the gas headers to ensure that the specified pressure is maintained
at the igniter. Ensure that the selected regulator has the required turndown capacity and response
time capability needed for this application. Install strainers upstream to protect regulator from
debris.
CAUTION:
Install flexible hoses between the rigid supply headers to the igniter that allow adequate
length for maximum thermal expansion of the boiler.
3.
Position igniter as needed to accept the flexible hose from air and gas supply. Ensure that all bends
in the flexible hose are in the same plane. Figure 4-2 illustrates a typical piping arrangement.
Figure 4-2 Typical Fuel Piping Arrangement
