Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 87

Electrical connections in the heat pump control...
Connection of primary circuit flow/return temperature sensor, two-stage heat
pump
3.
aS
aS
aD
[G
X
4.
aS Flow temperature sensor, primary
circuit
!
Please note
Identify sensor leads.
Fasten sensor leads and disman-
tled leads (with plug aS/aD)
together with the other LV leads
using the cable ties provided.
2.
aD
[G
X
Installation sequence
< 42 V
aD Return temperature sensor, primary
circuit
(cont.)
1.
87