Viessmann Vitodens 100-W B1HA 26Vitodens 100-W B1HA 35Vitodens 100-W B1KA 35 Installation And Service Instructions Manual page 14

Installation
Boiler Mounting
Boiler bracket
Boiler bracket
14
(continued)
Vitodens 100-W, B1HA series & B1KA Combi Installation/Service
Boiler mounting bracket installation on wood studs
Install mounting bracket on wood studs as per illustration.
Drill 3 / in. pilot holes to insert mounting bolts. Ensure
16
that holes are located in the center of each wood stud.
Secure with bolts to wooden studs as shown.
Boiler mounting bracket installation on metal studs
Install mounting bracket on metal studs as per illustration.
Drill f in. pilot holes to insert anchors. Ensure that
holes are located in the center of each metal stud. Use
appropriate fasteners to mount boiler mounting bracket
to metal studs (not supplied). Secure with bolts to metal
studs as shown.