Gas Pressure Check
Gas pressure requirements
Input Pressure
Natural Gas / Propane Gas
Minimum
5.0” WC
11.0” WC
Maximum
13.9” WC
13.9” WC
Manifold Pressure
High
3.5” WC
10.0” WC
Gas
Output
P.4.1
NG
2.2 mm 22,000 btu/hr
16.8%
Helifire360
LPG
1.3 mm 16,500 btu/hr
13.7%
Burner and Igniter
compression ring
Figure 15: HeliFire 360 gas requirements.
Figure 16: Removing spark
igniter collar.
Figure 17: Spark igniter with its
ignition wire and ground wire.
Figure 18: Outer burner tube
fully seated.
Figure 19: Outer burner tube not
fully seated.
Installers Information
Note: To test the gas pressure, turn off the gas supply before removing the plug from the supply
pressure test port or manifold pressure test port. Verify gas pressures with the HeliFire 360 lit.
The burner/igniter assembly consists of four main components: the valve fitting, the orifice, the outer burner
tube with its sintered bronze insert and the spark igniter collar. The valve fitting and the orifice both have com-
pression rings which keep the orifice and spark igniter collar in place while in an upside-down position.
Accessing / replacing the orifice
1. Remove the spark igniter collar by pulling upward on the outside disk a
short distance (Figure 15) and disconnect the ignition wire from the igniter
(Figure 15). There will be some resistance because of the compression
ring holding the collar in place.
2. Remove the outer burner tube with its sintered bronze insert by gently
pulling it off of the orifice and its compression ring.
3. Use a 1/2 inch socket wrench to remove the orifice.
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