User Manual

10
Siemens A6V11877580_en--_c
Smart Infrastructure 2020-10-08
Commissioning
CAUTION
Strong pressure impacts can damage closed PICVs.
● The PICVs must be commissioned with the manual control knob or
actuator correctly fitted.
● The PICVs must be open when flushing or pressure testing the system.
Flush only on correct flow direction.
● Differential pressure Δp
max
across the valves’s control path is not allowed
to exceed 600
kPa
Manual control
When turning the manual control knob in counterclockwise direction or manually operating
the actuator, the valve opens. The actuator closes the valve. The valves are supplied fully
open. The manual knob is not designed for permanent manual operation.
Maintenance
The VQP/VQI46.. PICVs are maintenance-free without differential pressure regulator.
Valve plug stem, presetting, diaphragm etc. may not be disassembled.
CAUTION
When performing se
rvice work on the valve and/or actuator:
● Switch off the pump and disconnect power supply.
● Close the shut-off valves in the piping network.
● Fully reduce pressure in the piping network and allow the pipes to cool
down completely.
Differential pressure regulator cleaning
General notes
The valve insert with the differential pressure regulator can be removed for replacement or
cleaning. The removal of the valve from the pipeline is not necessary for this operation. For
the cleaning process of the differential pressure regulator, a special tool is needed (ALP54,
see Accessories [➙ 6]).