Manifolds Manual 23
5. If there is sufcient pressure in the
underoorheatingsystem,youcanventeach
group separately by opening the group valve
and venting through the venting point at the
same time.
6. Close the group valve concerned af-
ter venting is completed and repeat this
procedure for any following groups.
After all groups and manifold have been fully
vented,makesurethatthereissufcientpres-
sure left in the system.
7. Put the plug into the earthed wall socket af-
terllingandventingthesystem.
NOTICE:
Pump must be vented. Check appendices Wilo
Para HU 25/6
Schematic total overview
Installing/mounting