34
Note
Type BWC 351.A07 is illustrated. In this
case, the circulation pumps are fitted and
connected at the factory (primary pump
qT
, secondary pump
6
incl. check
valve, circulation pump for cylinder heat-
ing
7
incl. check valve, instantaneous
heating water heater
4
optional).
In type BW 351.A07, no circulation
pumps are fitted at the factory. For the
connection, see "System examples"
(from page 45).
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 76 and the separate
service instructions for the Vitotronic 200
heat pump control unit.
Preparing for installation
DHW heating
(cont.)
5609 667 GB