73
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
Avoid appliance damage.
only fill the solar circuit with
Tyfocor LS.
3.
Vent the solar circuit.
Minimum system pressure:
1.7 bar (0.17 MPa)
Permiss. operating pressure:
6 bar (0.6 MPa)
Checking expansion vessel and heating circuit pressure
Observe engineering informa-
tion.
Heat pump 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.)
5546 699 GB
Service
