41
Draining the boiler on the DHW side
1.
Connect hose to drain valve and
route into a suitable container or drain
outlet.
Note
Ensure adequate ventilation in the
DHW pipework.
2.
Turn drain valve from lever position
A
to lever position
B
or
C
as
required.
■ Lever position
B
: Drain heating
system
excluding
cylinder via the
cold water connection.
■ Lever position
C
: Drain heating
system
and
cylinder via the DHW
connection. Cold water connection
remains filled.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5457 552 GB
Service