Primary Circuit, Type Bw + Bws (Two-Stage) - Viessmann Vitocal 300-G Installation And Service Instructions For Contractors

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

With two primary pumps
Hydraulic installation scheme
wP
wW
wU
P Primary circuit interface
Equipment required
Pos. Designation
1
Heat pump stage 1
2 Heat pump control unit
9 Heat pump stage 2
qT
Primary pump, heat pump stage 1
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
wU Geothermal probes/collectors
wQ wQ qZ
P P P P
P
qU
Preparing for installation
wT qT
2
9 1
19