Viessmann VR1 22 Installation And Service Instructions Manual page 18

Connections
Vitorond 100, VR1 22 to 33, 91 to 140 Installation and Service
Safety Connections (with Hydrostat 3250-Plus 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.
18