CC1J7215en11.05.2011 Building Technologies DivisionIndustry SectorExtra printed circuit board AGU2.522...for boiler management units LMU74...Mounting InstructionsThe extra printed circuit board (extra PCB) prevents premature failure of the LMU74... caused by loss ofcapacitance of a capacitor.The AGU2.522 ... and this Mounting Instructions are intended for use by OEMs which integrate the extra PCBin their products!