Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 84

Installation sequence
Electrical connections
Connection of primary circuit flow/return temperature sensor, two stage heat
pump
3.
aS
[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 low volt-
age leads using the cable ties
provided.
84
(cont.)
aS
2.
aD
aD
[G
X
< 42 V
aD Return temperature sensor, primary
circuit
1.