Viessmann Vitosol 222-T Installation And Service Instructions For Contractors page 35

Further details regarding the individual steps
A
2. Connect fill hose and fill pump (on
site).
3. Fill a container with heat transfer
medium (for fill quantity, see the
"Specification" chapter).
4. Turn cap of safety valve (see
page 26) slightly anti-clockwise.
Commissioning the system
!
Please note
Do not connect the power supply
until the DHW cylinder has been
filled.
Commissioning, inspection, maintenance
5. Open fill tap (turn handle A by
90°).
6. Switch on fill pump.
B
Note
Operate fill pump until heat transfer
medium runs out of the safety valve.
7. Close fill tap and switch off fill pump.
8. Tighten cap on safety valve (see pre-
vious diagram).
9. Remove fill hose and screw on lock-
ing cap.
10. If leaks occur, drain the solar ther-
mal system and repeat the proc-
ess.
Insert the power plug into the socket.
The socket must comply with the safety
standard and must be approved for a
current ≥10 A.
(cont.)
35