Functional descriptions
Functional descriptions
Figure 1 PI diagram
Check the Tips
xxxx-FI-2
Flow measurement FI-2 measures flow from pump P-2.
- Range 0…120 l/min
- Alarms:
- higher high limit 110 l/min
- high limit 40 l/min
- lower low limit 0 l/min
- low limit 0 l/min
xxxx-HS-1
Shut-off valve HS-1 closes the flow from pump P-1.
M mode: The valve can be controlled by operator.
A mode: The valve is close, when the P-2 is running and open, when P-2 is not running
Open and close limits do not exist.
xxxx-HS-2
Shut-off valve HS-2 closes the flow from pump P-2.
M mode: The valve can be controlled by operator.
A mode: The valve is close, when the P-2 is running and open, when P-2 is not running
Open and close limits do not exist.
xxxx-HS-3
Shut-off valve HS-3 opens the flow from the pump P-1 to the tank T2.
M mode: The valve can be controlled by operator.
A mode: The valve is open, when the P-2 is running and close, when P-2 is not running
Open and close limits do not exist.
xxxx-FIC-1
The loop controls the control valve FV-1.
M mode: Operator can control valve 0...100%
A mode: Is not in use
Interlocks
- The valve is forced to 50%, wen the pump P-2 is running.
xxxx-LIC-2
The loop controls the control valve FV-2.
M mode: Operator can control valve 0...100%
A mode: Is not in use
Interlocks
- The valve is forced to 100%, when the pump P-2 is running.
xxxx-LZ
Information to the other loops.
All the levels are OK, when:
-
Level switch LZ-1 is active (1), the level in T2 is not too high.
Level switch LZ-2 is active (1), the level in T3 is not too high.
Level switch LZ-3 is active (1), the level in T1 is not too low.
xxxx-P-2
The pump P-2 pumps the water from the tank T1 to the tank T2.
M mode: The operator can start and stop the pump
A mode: Is not in use
Interlocks
- The pump can not run, if the the one of the switches LZ-1, LZ-2 or LZ-3 is inactive.