53
Insert the green pipe (which connects the 3-way manual valve) into the
top of the actuator head (as shown).
The Sentinel actuator is now installed.
The current state of the system is that the actuator is holding the PRV
pilot at the Minimum outlet pressure. The actuator chamber and
Sentinel pipework are empty of water.
The 3-way tap is in the central (closed) position.
4.13
B
LEED AIR FROM THE PIPEWORK AND ACTUATOR
Open the PRV service
valve that provides the
water supply to the
Hydroswitch.
Open any additional PRV
service valve that
connects water pressure
to any pressure
transducers (internal or
external).
Where internal transducers are fitted, detach and then re-attach the pipes using the
quick-release connectors at the Sentinel 2 side (several times). This will allow air to
escape from the pipes via the quick-release connector and be replaced by water.
Caution:
Check the
needle valve
is set to limit the PRV pressure changes when the
actuator switches between low and high.
Open service valve that
provides Hydroswitch water
feed and any that connect to
internal transducers.
Open service valve that
provides Hydroswitch water
feed and any that connect to
external transducers.