Viessmann VITOCAL 300 Installation And Service Instructions Manual page 10

Preparing for installation
Overview of possible system versions
Sys- Standard equipment
tem
de-
sign
Direct Heat-
heat- ing
ing circuit
circuit with
mixer
0
1 X
2 X
3 X
4 X
5 X X
6 X X
F The Vitocal 300 responds only to external demand signals. All exter-
nal sensors (e.g. room temperature sensors) and relay outputs are
disabled.
When a demand is issued by an external signal, primary pump, sec-
ondary pump and compressor start (prerequisite: Activation condi-
tions such as temperature limits have been met).
10
(cont.)
Additional equipment
(only one option per
system design)
DHW Buffer Low
cylin- cylin- loss
der der header
X
X
X
X
X
X
X
X X
X
X
X
X
X
"Natural cool-
ing"
exter- with with-
nal heat mixer out
source mixer
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X