Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 47

System example 2, ID: 4605308_1006_01
Pos. Designation
3
Outside temperature sensor
5 Circulation pump for cylinder heating (heating water side) for heat pump
stage 1
6 Secondary pump for heat pump stage 1
8 KM BUS distributor
9 Heat pump stage 2
qP Secondary pump for heat pump stage 2
qQ Circulation pump for cylinder heating (heating water side) for heat pump
stage 2
qW Safety equipment block with safety assembly
qE Expansion vessel
Primary circuit
qT Primary pump for heat pump stage 1
qZ Primary circuit flow temperature sensor (installation only required for two-
stage heat pump, see page 87)
qU Primary circuit return temperature sensor (installation only required for two-
stage heat pump, see page 87)
wT Primary pump for heat pump stage 2
wP Brine accessory pack
wQ
Pressure switch, primary circuit
wW Brine distributor for geothermal probes/geothermal collectors
wU Geothermal probe/geothermal collector
Preparing for installation
(cont.)
47