Viessmann Vitorond 100 VR1 Series Installation And Service Instructions Manual page 22

Connections
Vitorond 100, VR1-22 to -33 Installation and Service
Safety Connections (Vitotronic Control)
(continued)
1. To avoid problems with removing the top panel,
we recommend moving the top panel screw
approximately 3" to the left or right. To do so,
d
pre-drill the panel with an " drill bit.
d
To reinstall the top panel, drill a new " pilot hole
through the top back panel and into the back panel.
Reinstall the screw P into this new mounting hole.
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