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
Summary of Contents for FS2B
Page 163: ...163 5457 552 GB ...
