Siemens LMV5 Series Basic Documentation page 270

270/278
Siemens Building Technologies
HVAC Products
18.12.3 Setting the O
•
Selecting the O min. value
2
The O2 min. value should be set as low as possible to ensure a high level of
availability.
Above or at the O2 min. value, hazardous conditions may not permanently
occur.
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. value
The distance should be a minimum of 1...1.5 % O
the ratio curve must be set as accurately as possible, in accordance with
subsection 18.12 Setting notes - «Setting O2 ratio control».
•
All O2 setpoints must be adjusted under the same environmental conditions
It is important to adjust the O
later, individual setpoints are changed, all setpoints of the curvepoints must be
readjusted since environmental conditions will probably be different from those at
the time the initial settings were made.
18.12.4 Other notes
When 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. This
can cause problems in connection with precontrol or O
Basic Documentation LMV51...
18 Addendum 4: LMV52... with O2 trim control and O2 module
2
trim controller
setpoints at the same ambient temperatures. If,
2
. If a smaller distance is used,
2
trim control.
2
CC1P7550en
01.10.2003