Ochsner AIR BASIC 109, Operating Manual/Installation Manual

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BA_AIR_BASIC_ELW_Multitower_OTE3_SW5x_CC_EN_V08.docx Page 19 of 92
4.1.4 Expansion vessel
Figure 22: Draining and filling detailed view
For larger system volumes, the expansion vessel has to be re-calculated. If the integral 24 l vessel is not
adequate, install an additional expansion vessel externally. See
EN 12828
4.1.5 Venting the system
Figure 23: Indoor unit air vent valve
Water will escape when the safety valve is opened.
Route the plastic hose at the rear of the heat pump into the sewage drain. Ensure proper drainage. The
drain must not be permanently connected to the sewage drain! A funnel with a siphon must be provided.
NOTE
Drain and fill opening
Expansion vessel
NOTE
Air vent valve
CAUTION!
Close the valve cap after
venting.