Replace The Orifice - Rinnai I Series Installation And Operation Manual

1. Confirm that the inlet gas pressure is between the minimum and maximum pressures allowed
for this boiler.
2. Disconnect electrical power to the boiler.
3. Turn off the boiler's gas supply by turning off the gas control valve.
4. Remove the boiler's front panel by removing the four screws that secure the panel.
5. Locate the orifice cover plate on top portion of gas valve (Figure 1).
6. Remove the three screws securing the orifice cover plate (Figure 1).
Figure 1
7. Remove the plastic orifice from the housing (Figure 2).
8. Install the new inner and outer gaskets onto the new orifice (Figure 2).
9. Install new orifice into housing (check the gas type displayed on the orifice: Red orifice is LPG; Blue
orifice is NG).
10. Confirm gasket is correctly in place (the groove side of gasket must be facing outwards) (Figure 2).
11. Reinstall the orifice cover plate using the three screws to secure it to the gas valve.
12. Turn on the power and gas. Inspect for gas leaks.
13. Proceed to the next section (14.5.3 Adjust Parameter Settings).
Figure 2
Rinnai I-Series Condensing Boiler Combi Manual
Orifice
Cover
Plate
Grooved side of outer gasket MUST face outwards.
Cover
Outer
Plate
Gasket
Inner
Orifice
Gasket
Three screws
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