Viessmann Vitocal 300-G Installation And Service Instructions Manual page 55

DHW heating 2
(cont.)
Required devices
Pos. Description
1 DHW cylinder
2 Electric immersion heater EHE (accessory)
below the upper cylinder temperature sensor 4
not required if an instantaneous heating water heater is installed
only connect if the external heat source is not used for DHW heating
On-site connection
3 DHW circulation pump (max. 50 W, option)
4 Cylinder temperature sensor, top
5 Two-way valve, N/C (in the DHW circuit; control both components via
2X8.12)
6 Flow rate limiter
7 Plate-type heat exchanger
8 Circulation pump for cylinder heating (max. 130 W, already installed
and connected for type BWC/WWC)
9 Cylinder temperature sensor, bottom (option)
qP Cylinder primary pump (max. 130 W)
Preparing for installation
55