Further details regarding the individual steps
Draining the boiler on the DHW side
Commissioning, inspection, maintenance
(cont.)
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.
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