Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 29

Primary circuit, type BW + BWS (two-stage...
wP
qT
wW
wU
P Interface, primary circuit
Equipment required
Pos. Description
1 Heat pump stage 1 (type BW)
2 Heat pump control unit Vitotronic 200, type WO1A
9 Heat pump stage 2 (type BWS)
qT Common primary pump
qZ Primary circuit flow temperature sensor (for installation, see page 84)
qU Primary circuit return temperature sensor (for installation, see
page 84)
wP Brine accessory pack
wQ Pressure switch, primary circuit
wW Brine distributor, geothermal probes/collectors
wU Geothermal probes/collectors
Electrical connection
For further information regarding the
PCBs, see from page 220.
wQ wQ qZ
P P P P
P
qU
Preparing for installation
(cont.)
2
9 1
29