Vaillant VR 920 Operating And Installation Instructions page 84

4 Installation of the built-in version by the competent person
1. Disconnect the product from the power grid and protect
it against being switched back on.
A
2. Remove the boiler's front casing using work steps (A),
(B) and (C).
A
3. Remove the communication unit from the retaining box
by pushing the bracket very far upwards (A).
4. Tilt the communication unit forwards and out (B).
82
5.
C
6.
7.
B
B
8.
9.
Remove the plug for the eBUS line and the power sup-
ply from the communication unit.
A
B
Remove the eBUS line from the retaining box's cable
duct (A).
Remove all of the cable ties from the eBUS line (B).
Hinge the boiler's electronics box down.
If water has accumulated in the boiler, use a cloth to
remove the water.
Operating and installation instructions 0020266269_00