Viessmann Vitocal 300-G Installation And Service Instructions Manual page 39

Integrating a heat pump cascade into the system...
The following communication modules
(accessories) must be fitted in the heat
pump control units:
– LON communication module for the
cascade in the lead appliance
– LON communication module in lag
heat pumps
■ The partial scheme can be integrated
into the system examples via the inter-
faces indicated.
Preparing for installation
(cont.)
39