Page 33
JXi
™
Gas Conversion / Replacement Instructions
WARNING
To avoid the risk of a gas leak, which can lead to fire or explosion
resulting in property damage and serious injury, including loss of
life, do not replace the O-ring with anything but a genuine Zodiac
®
custom part included in this kit. No substitution should be made
for the O-ring. Always replace the gas orifice and O-ring as one
assembly and use ONLY Zodiac original equipment parts.
14. Reposition and reconnect the gas train to the blower by tightening the
union.
15. Reinstall the brace bar and gasket retainer bracket.
16. Reinstall the heater rear panel and the gas valve shield.
17. Reinstall the heater top panel. Take care not to damage or abrade any
wiring.
18. Test the gas offset pressure (following).
Test Gas Orifice Offset Pressure
NOTE:
Test the gas orifice pressure with the heater running using a digital
differential pressure manometer.
1. Verify the gas valve control switch is in the ON position.
2. Verify the gas shut-off valve is open.
3. Test the offset pressure with the heater running using a digital
differential pressure manometer. Connect a tee to the hose from the
fan inlet port (see Figure 32) on the blower.
4. Connect a shorter hose from the gas valve vent port to the opposite
side of the tee (see Figure 32).
5. The manometer has a positive (high pressure) port and a negative
(low pressure) port. Connect a hose on the third joint of the tee to the
positive (high pressure) side of the manometer
(see Figure 32).
6. Remove the NPT plug from the gas valve manifold port (labeled
“PRESS” “TAP”) and screw in the barbed adapter.
7. Connect one end of a hose to the gas valve manifold port and the other
end to the negative (low pressure) side of the manometer
(see Figure 32).
