I know the gas supply is an issue that has occured prior on other units around this facility, that is still in the process of getting resolved. This unit would not fire at times when I still had 8-9" inlet press. and about 8" between honeywell and maxitrol valve. Is there a setting on downsteam side of the modulating valve (manifold) I should be looking for? Was informed to not even pay attention to this. Was this legitament advice?