79
Filling and venting the solar circuit
Danger
Overheated collector areas and
overheated heat transfer medium
can cause burns/scalding and
equipment damage.
When working on the collector
and the solar circuit with heat
transfer medium, protect the col-
lector areas against insolation.
1.
Check the pre-charge pressure of the
expansion vessel.
2.
!
Please note
To prevent equipment dam-
age,
only fill the solar circuit with
Tyfocor LS.
3.
Vent the solar circuit.
Minimum system pressure: 1.7 bar
Permissible operating pressure:
6 bar
Checking expansion vessel and heating circuit pressure
Observe engineering informa-
tion.
Vitocal technical guide
Cleaning the DHW cylinder
Danger
Uncontrolled escape of DHW or
heat transfer medium can cause
scalding and building damage.
Only open DHW and heating
water connections with a depres-
surised DHW cylinder.
!
Please note
Negative pressure in the DHW
cylinder can cause material dam-
age.
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.)
5623 661 GB
Service
