INSTaLLaTION
appliance installation
32
| WPL 15 IKS | WPL 25 IK
www.stiebel-eltron.com
Filling the heating system
!
Material damage
Never switch on the power before filling the system.
In the delivered condition, the diverter valve of the MFG is posi-
tioned at the centre, enabling the heating and DHW circuits to be
filled evenly. If power is switched on, the diverter valve automati-
cally moves into the central heating position.
If you intend filling or draining the system later, first place the
diverter valve into its centre position.
For this, activate controller parameter DRAIN HYD in the DIAGNO-
SIS / RELAY TEST SYSTEM menu.
1
26
�0
3�
01
�1
75
8
1 Drain (heat exchanger)
f
f
Fill the heating system via the drain.
Venting the heating system
f
f
Prior to venting, open the quick-action air vent valve in the
multi function assembly (MFG).
D
00000
36
27
1
1
2
1 Quick-action air vent valve
2 Electronic
!
Material damage
The air vent in the knurled cap of the quick-action air vent
valve must not point towards the MFG PCB.
f
f
Turn the air outlet in the direction shown in the fol-
lowing diagram.
D
00000
36
04
2
!
Material losses
f
f
Close the quick-action air vent valve again after ven-
ting.