Siemens LMV5 Series Technical Instructions page 194

Technical Instructions
Document No. LV5‐1000
barometric pressure that existed during O
change to keep the same %O
Air temperature during O
2
Barometric pressure during O
Maximum expected air temperature = 120°F (+40°F compared to commissioning)
Minimum expected air temperature = 30°F (‐50°F compared to commissioning)
Maximum expected barometric pressure = 31.5 inHg (+1.5 inHg compared to commissioning)
Minimum expected barometric pressure = 28.0 inHg (‐2.0 inHg compared to commissioning)
Using Figure 6‐8 and the information above, the following values can be found:
O2MaxManVariable = 13
O2MinManVariable = ‐16
Since other small factors exist that can change (heating value of the fuel, change in draft, etc.), it is
suggested that an additional 5% are added to the max and subtracted from the min, giving the following
settings:
O2MaxManVariable = 18
O2MinManVariable = ‐21
Figure 6‐9: Finding the Theoretical Max and Min Manipulated Variable for Given Conditions
Section 6 Page 22 SCC Inc.
Control Curve commissioning, the manipulated variable must
2
in the stack. An example is done below and illustrated in Figure 6‐9:
2
Control Curve commissioning = 80°F
Control Curve commissioning = 30.0 inHg
2
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