Siemens LMV5 Series Basic Documentation

Also see for LMV 5 Series: User manual Manual Technical instructions Quick start guide Manual

270/278Siemens Building Technologies Basic Documentation LMV51... CC1P7550enHVAC Products 18 Addendum 4: LMV52... with O2 trim control and O2 module 01.10.200318.12.3 Setting the O 2 trim controller• Selecting the O2 min. valueThe O2 min. value should be set as low as possible to ensure a high level ofavailability.Above or at the O2 min. value, hazardous conditions may not permanentlyoccur.Guide values: CO = 2,000 ppm, soot number 3.The values can vary, depending on the type of plant.• Adequate distance between O2 setpoint and O2 min. valueThe distance should be a minimum of 1...1.5 % O 2. If a smaller distance is used,the ratio curve must be set as accurately as possible, in accordance withsubsection 18.12 Setting notes - «Setting O2 ratio control».• All O2 setpoints must be adjusted under the same environmental conditionsIt is important to adjust the O 2 setpoints at the same ambient temperatures. If,later, individual setpoints are changed, all setpoints of the curvepoints must bereadjusted since environmental conditions will probably be different from those atthe time the initial settings were made.18.12.4 Other notesWhen firing on oil and using a VSD, the oil pump must be driven separately.If this is not observed, the fan speed has an impact on the amount of oil delivered. Thiscan cause problems in connection with precontrol or O 2 trim control.