Operating instructions

41
3. Vent the solar circuit.
Minimum system pressure: 1.7 bar
Permissible operating pressure:
6 bar
Checking the expansion vessel and the heating circuit pressure
Observe design information.
Vitocal technical guide
Cleaning the DHW cylinder
Danger
DHW or heat transfer medium
escaping uncontrollably can lead
to scalding and building dam-
age.
Only open DHW and heating
water connections with an dep-
ressurised DHW cylinder.
!
Please note
Negative pressure in the DHW
cylinder can lead to material
damage.
The air vent valve must always be
open when draining with a vac-
uum pump.
!
Please note
Pointed or sharp cleaning
objects may damage the DHW
cylinder.
!
Please note
Cleaning agents containing
hydrochloric acid attack the
material of the DHW cylinder.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5441 603 GB
Service