Viessmann Vitocal 300-G Installation And Service Instructions Manual page 22

Preparing for installation
Primary circuit, type BW 301.A + BWS 301.A...
Equipment required
Pos. Description
1
Heat pump stage 1
2 Heat pump control unit
9 Heat pump stage 2
qT
Common primary pump
qZ Primary circuit flow temperature sensor (for installation, see page 90)
qU Primary circuit return temperature sensor (for installation, see
page 90)
wP Brine accessory pack
wQ Pressure switch, primary circuit
wW Brine distributor, geothermal probes/collectors
wU Geothermal probes/collectors
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.
22
(cont.)