Sentinel JetFlush Rapid Manuel D'utilisation Et D'entretien page 8

EN
Section B – Using the Jetflush Rapid pump for power flushing
expansion and cold feed pipes in order to avoid the flushing pump filling and
overflowing the expansion tank.
The F&E pipes may be capped with push fit end caps, such as Speedfit,
Prestek, or Hep2O, or a temporary compression fitting gate valve.
Depending on the configuration of the heating system looping the feed and
expansion pipes together may enable these pipes to be flushed during the
cleansing process, which can be beneficial when the cold feed pipe contains
corrosion deposits.
NOTE 1: This will only be effective when the F&E pipes are not close
coupled, or connected via an air separator, and may not remove deposits
which have hardened over a long period of time.
NOTE 2: The looping connection may be made with any sturdy flexible
tubing, but should incorporate a valve in the loop to close the circuit when
flushing individual radiators.
Capping or looping the F&E pipes are only temporary measures, which
must be removed after the flushing process.
ENGINEER'S TIP: Don't drain water from the system to lower the water
level in the F&E tank until after the flushing pump has been connected into
the system.
Tie up the F&E tank ballcock or otherwise turn off the cold water feed,
and return to the flushing pump. Open both the isolating valves, without
switching on the electric motor. The head of water in the house means that
heating system water will run down the flow and return hoses and into the
tank. Let the water run until the tank is half full, and close both isolating
valves.
You should now have emptied the F&E tank sufficiently to carry out the
necessary valving or capping off of the cold feed.
NOTE: If there is a large amount of sludge or slime present in the F&E tank it
must be cleaned manually and not drained into the system.
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Jetflush Rapid Guidelines (19-02-15).indd 8
Jetflush Rapid V1-02-15
19/02/2015 12:13