63
A
B
A
Manual air vent valve
B
Drain valve
1.
Open any non-return valves installed
on site.
2.
Check the pre-charge pressure of the
expansion vessel: See page 64.
3.
Fill the secondary circuit via the on-
site BDF valve (flush) and vent the
circuit.
4.
Check the system pressure at the
pressure gauge (on site): Top up with
water if required.
Minimum system pressure: 0.8 bar
(80 kPa)
Permiss. operating pressure: 3 bar
(0.3 MPa)
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5516 436 GB
Service
