What Should The Gas Pressure Be On A Propane Furnace Hvacseer The ideal manifold pressure should be between 3.2"wc to 3.7"wc. for two stage burners: it should be 9.7"wc to 10.3wc for high fire. it should be 6.7"wc to 7.3"wc for low fire. your propane furnace, when operated consistently with the wrong settings, can lead to serious maintenance issues. Hvac contractors recommend getting your propane furnace serviced twice a year, preferably in the fall and spring. however, if you're not keeping track, you should at least get it serviced once a year. you can benefit a lot by getting it checked annually. sometimes you might be able to catch problems early.
What Should The Gas Pressure Be On A Propane Furnace Hvacseer Propane gas pressure adjustment. my rheem 95% furnace calls for setting the intake propane gas pressure to 10" wc and the manifold pressure to the same 10" wc. however, the max pressure that the manifold pressure can be adjusted is about 9.6" of gas pressure. it's a brand new propane conversion kit, and i don't think anything is wrong with it. The minimum gas supply pressure. must be 1" water column (0.036 psi or 249 pa or 2.5 millibars ) above the manifold pressure printed on the appliance data plate. the maximum gas supply pressure. must not exceed 14" water column (0.5 psi or 3487 pa or 34.9 millibars) the natural gas supply pressure. Im working on a new coleman 72000 btu propane gas furnace . and gas valve is dropping out real slow and the inlet gas pressure is 10.5 inches w.c. witch is fine however when gas valve opens inlet pressure drops to 6 inches w.c. and gas valve drops off if i adjust manifold pressure above 1.8 inches w.c it has new regulator. The ideal manifold pressure ranges from 3.2″wc to 3.7″wc. in the case of two stage burners: for high fire, it should be 9.7″wc to 10.3″wc. low fire should be 6.7″wc to 7.3″wc. when your propane furnace is consistently operated with the incorrect settings, it can cause serious maintenance issues, which is why it is critical that you.
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