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Building Technologies Division
Basic documentation LMV36...
CC1P7544en
Infrastructure & Citiies Sector
7 Basic unit
25.09.2013
Pressure switch-max-oil
In all types of oil trains, the maximum oil pressure is monitored from phase 22. If the
maximum oil pressure is exceeded after the maximum time (parameter 214) has
elapsed, or during the subsequent phases, the system initiates lockout.
No. Parameter
214
Max. time start release
Error
code
Diagnostic
code
Meaning for the LMV36... system
14 0
POC
open
1 POC
closed
21
0
Pressure switch-max (Pmax): Max. oil pressure exceeded
During the safety times (TSA1 / TSA2), the signal from pressure switch-max is only
assessed after a certain period of time has elapsed to ignore the pressure shocks that
occur the moment the valves open.
No. Parameter
269
Oil: Time to respond to pressure faults within safety time 1 (TSA1) and safety
time 2 (TSA2)
369
Fuel 1 oil: Time to respond to pressure faults within safety time 1 (TSA1) and
safety time 2 (TSA2)
The terminal can also be used for POC (Proof of Closure) (refer to chapter
Sequence
diagrams
).
No. Parameter
277
Oil: Pressure switch-max / POC input
0 = inactive
1 = pressure switch-max
2 = POC
377
Fuel 1 oil: Pressure switch-max / POC input
0 = inactive
1 = pressure switch-max
2 = POC
Note
If the input is used for POC, pressure switch-max can be included in the safety loop.
In that case, pressure switch-max must not be fitted between the valves, but after
them.
Start release oil
If the input is simultaneously used as a start release input (e.g. for an air supply
damper), the latter can be connected in series with the pressure switch.
If the input is parameterized for POC, it cannot be used as a start release input.