System Version 2 - Viessmann VITOCAL 300-A Installation And Service Instructions Manual

Preparing for installation

System version 2

& The hydraulic diagram shows a
Vitocal 300-A, type AW-O-M.
& For type AWC-I-M, the secondary
pump and three-way diverter valve
are installed and electrically con-
nected inside the appliance (for
electrical connection, see from
page 71).
& The appliance starts immediately
after switching on; the insertion of a
jumper in the safety chain is not
required.
42
Select system diagram 6 (see
page 34 and 132)
& 1 heating circuit without mixer (A1)
& 1 heating circuit with mixer (M2)
& DHW heating with DHW cylinder
& Heating water buffer cylinder
& Option:
DHW heating with a solar thermal
system