Control Connections; Accessing The Control Electrical Connections Box; External Cable Connection - Viessmann VITOCROSSAL 300 Installation Instructions Manual

Control Connections

Accessing the Control Electrical Connections Box

External Cables Connections
Legend
A Strain relief
Low voltage plugs
! Outdoor temperature sensor
? Low loss header temperature sensor
% Tank temperature sensor (in the control unit pack)
aVG KM BUS subscriber (accessory)
H Vitotrol 200A or 300A remote control
H Extension kit for one heating circuit with mixing
valve
H Solar control module, type SM1
24
Vitocrossal 300 CU3A 26 to 57 Installation
1. Remove the screws from the top panel and set aside.
2. Slide the top panel to the rear of the boiler and lift up.
3. Remove the retaining nuts from the control
connection cover and set aside.
4. Slide the control connection cover to the rear of the
boiler and lift up.
Routing the connecting cables
Note: Connecting cables will be damaged if they touch
hot components. When routing and securing
power cables on site, ensure that the maximum
permissible temperatures for these cables are not
exceeded.
Connecting External Cables
For information on accessory connection,
observe the separate installation instructions
provided with the accessories.
120V~ plugs
sÖ Heating circuit pump
Rated voltage: 120V~
Rated current: max. 2 A~
sA Circulation pump for tank heating
Rated voltage: 120V~
Rated current: max. 2 A~
sK DHW circulation pump
Rated voltage: 120V~
Rated current: max. 2 A~
fÖ Power supply
WARNING
Incorrect core allocation can cause severe injury and
can damage the appliance. Never interchange cores
"L" and "N".