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Navien combustion analysis

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cm6230
cm6230 Member Posts: 19
in Gas Heating

hi all, just bought a house with a newer navien ncb 190-80h. Checked combustion and dialed it in at recommended 10.7%co2 for LP. Original at 10.5% was within range to begin with
checked offset gas pressure and it’s lower than it should be at -.015 to -.025.
Navien wants -.04 with a +/- .01

Called tech support and they said go by the combustion analyzer.
im not used to gas, only oil.
anyone have any insight? Unit has been running fine for 2 months, just wanted to check combustion.

FYI LP coming in house is about 10.5 wc

Thanks

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