Operating instructions

40
2. Check the pre-charge pressure of the
expansion vessel (see page 41).
3. Fill (flush) and vent secondary cir-
cuit:
■ Slightly open quick-action air vent
valve (see safety assembly on
page 25) (remains open).
■ To vent, move hand lever of three-
way diverter valve for heating/
DHW into its centre position (see
adjacent diagram).
4.
!
Please note
To prevent equipment dam-
age, check the flow and return
connections of the secondary
heat pump circuit for leaks.
In case of leaks, immediately
shut off the equipment, drain
the water and check the seat-
ing of the seal rings. Replace
all seal rings that may have
become dislodged.
5. Check the system pressure and top
up with water if required.
Minimum system pressure: 0.8 bar
Permissible operating pressure:
3 bar
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 solar irradia-
tion.
1. Check the pre-charge pressure of the
diaphragm expansion vessel.
2.
!
Please note
To prevent equipment
damage, only fill the solar cir-
cuit with Tyfocor LS.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5441 603 GB