64
1.
Open any non-return valves installed
on site.
2.
Check the pre-charge pressure of the
expansion vessel and top up if
required.
3.
Fill (flush) and vent the secondary cir-
cuit via an on-site connection.
F
E
D
C
Safety assembly supplied
C
Pressure gauge
D
Connection G¾
E
Quick-action air vent valve
F
Safety valve
4.
Check the system pressure at pres-
sure gauge
C
and top up with water
if required.
Minimum system pressure: 0.8 bar
(80 kPa)
Permiss. operating pressure: 3.0 bar
(0.3 MPa)
5.
Place the control panel in its service
position; see page 81.
6.
Open programming unit; see
page 79.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5782 176 GB
