Vaillant VR 920 Operating And Installation Instructions page 91

Installation of the built-in version by the competent person 4
7. Hinge the boiler's electronics box down.
B
8. Open the electronics box at the points provided for this
(A).
9. Hinge the electronics box's cover open (B).
10. Remove the power supply plug for the communication
unit from terminal X12 on the boiler's electronics in the
electronics box.
0020266269_00 Operating and installation instructions
A
X11
X18
T2
X101
X12
11. Remove the retaining box from the electronics box.
12. Install the new retaining box on the electronics box.
13. Connect the power supply plug for the communication
unit to terminal X12 on the boiler's electronics in the
electronics box.
CLICK
X11
X18
T2
X101
X12
89