Primary Circuit, Type Bw + Bws (Two-Stage Version) - Viessmann VITOCAL 300-G Installation And Service Instructions Manual

Primary circuit, type BW + BWS (two-stage version)

With two primary pumps
wP
wW
wU
P Primary circuit interface (see sys-
tem examples)
Equipment required
Pos. Description
1 Heat pump stage 1 (type BW)
2
Heat pump control unit
9 Heat pump stage 2 (type BWS)
qT Primary pump (heat pump stage 1, type BW)
qZ
Flow temperature sensor, primary circuit
qU Return temperature sensor, primary circuit
wP Brine accessory pack
wQ Pressure switch, primary circuit
wW Brine distributor, geothermal probes/collectors
wT Primary pump (heat pump stage 2, type BWS)
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
wT qT
2
9 1
27