Viessmann Vitoplanar EI2 Installation Instructions For Contractors page 10

Position of mounting brackets
Horizontal (only type EI_.A500_ and EI2.A350DI)
Fig. 7
Vitoplanar, type EI_.A750_, EI2.A500DI, EI2.A500B and EI3.A500B
Vertical
Fig. 8
Horizontal (only type EI_.A750_ and EI2.A500DI)
Fig. 10
10
(cont.)
Drill holes
Fig. 9