Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 25

Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Electrical Connections
External connections for boiler models 3.5 to 6.0
Legend
Heating circuit pump A1
sÖA1
sÖM2 Heating circuit pump M2
sÖM3 Heating circuit pump M3
Circulation pump for tank heating
sA
DHW circulation pump
sK
sL Boiler circuit pump
gÖ Central fault message
3-way mixing valve
gS
gSM2/M3 Mixing valve motor 120 V~
(continued)
A On-site relay
On-site safety equipment
B
C On-site indoor air damper
Installation
25