38/278Siemens Building Technologies Basic Documentation LMV51... CC1P7550enHVAC Products 4 Burner control 01.10.2003The input is used for connecting a heavy oil direct start signal with which circulationPhase 38 with HO or Phase 44 with HOgp can be shortened.In the circulation phase, the waiting time for the signal is a maximum of 45 seconds. Ifthe signal is not delivered, home run will take place, followed by → repetition. The inputis only active when firing on heavy oil (HO or HOgp).The input can be deactivated.Parameter: HeavyOilDirStart (activated / deactivated)2) (activated / deactivated) Active inputs are checked for signal inputs.The input is used for connecting a fan contactor contact (FCC) or a flue gasrecirculation pressure switch (FGR-PS).a) Parameter: Config_FGR-PS/FCC (FCC)The input is active when firing on oil and gas. It serves for checking the position of thefan contactor.A signal is anticipated at this input after the fan has received a control command.b) Parameter: Config_FGR-PS/FCC (FGR-PS)The input has been designed for the connection of an air pressure switch for flue gasrecirculation (only from LMV52...).c) Parameter: Config_FGR-PS/FCC (deactivated)The function of the input can be deactivated.Direct heavy oil start(HO-START)X6–01Fan contactor contact(FCC) or FGR-PSX4–01