Viessmann Vitocal 300-G Installation And Service Instructions Manual page 33

DHW heating
(cont.)
Required equipment
Pos. Description
6
Secondary pump
7 Circulation pump for cylinder heating
eP DHW cylinder
eQ
Cylinder temperature sensor, bottom (optional)
eW Cylinder temperature sensor, top
eU DHW circulation pump (optional)
rP
Immersion heater (create electrical circuit on site. Can only be used as an
alternative to the external heat source for DHW reheating.)
Electrical installation scheme
For an overview of the electrical connec-
tions and more information on the PCBs,
see from page 72 and the separate
service instructions, Vitotronic 200 heat
pump control unit.
2
212.3
X1.
X2.N
224.7
X2.N
A On-site contactor
F6
F7
Preparing for installation
50 W
M
ZP
1~
L1 L2 L3 N
A
PT500
STS
PT500
STS
37
40
31
32
33