SYR 4807 Mode D'emploi page 8

Diaphragm expansion vessel:
The diaphragm expansion vessel has to be
serviced once per year:
Close the expansion vessel's ball valve.
Prepare an adequate collection contai-
ner (for instance a bucket) and remove the
plug from the lever of the anti-legionella val-
ve in order to drain the expansion vessel.
Remove the plug from the expansion vessel's
front side.
8
Test the expansion vessel's pre-filled gas
pressure by means of an air pressure gauge.
The setting of the pre-filled gas pressure de-
pends on the static pressure downstream of
the pressure reducing valve.
Pre-filled gas pressure = outlet pressure
(pressure reducer) - 0,2 bar