Viessmann VITOCAL 300-G Technical Manual page 32

Design information
3
C Cooling interface
H Heating interface
P Primary circuit interface
Equipment required
Pos. Description
Heat source
1 Heat pump stage 1
2 Heat pump control unit
3 Outside temperature sensor
5 Circulation pump for cylinder heating (heating water side), heat pump stage 1
6 Secondary pump, heat pump stage 1
9 Heat pump stage 2
qP Secondary pump, heat pump stage 2
qQ Circulation pump for cylinder heating (heating water side), heat pump stage 2
qT Primary pump, heat pump stage 1
qZ Flow temperature sensor, primary circuit
qU Return temperature sensor, primary circuit
wT Primary pump, heat pump stage 2
VIESMANN
32
(cont.)
W DHW interface
I Lead appliance (two-stage) of the heat pump cascade
II to IV Lag heat pump (two-stage) 1 to 3
VITOCAL 300-G