Operating instructions

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