Operating instructions

Venting the boiler
1. Close the shut-off valves on the
heating water side.
2. Connect the drain hose between
top valve B and a drain outlet.
3. Open valves A and B and vent
using mains pressure until no more
air noise is audible.
If required, move the 3-way valve
into its central position to achieve
complete venting. For this, set
code "2F:2".
4. Close valves A and B and open
the heating water shut-off valves.
Venting the heating system
1. Close the gas shut-off valve and
switch ON the control unit.
Further details regarding the individual steps (cont.)
8
Commissioning, inspection, maintenance
5692 672 GB