Overview Of Controls; Modular Structure; Programming Unit (H01B) - Viessmann VITOCROSSAL 300 CU3A 35 Operating Instructions Manual

Controls

Overview of Controls

Heating circuit interface
Zone control interface
12
Vitocrossal 300 CU3A 26 to 199 Operating

Modular structure

The control unit is integrated into the boiler. The control
unit comprises a standard unit, electronics modules and
a programming unit.
Standard unit:
ON/OFF switch
■
Optolink laptop interface
■
Operating and fault indicators
■
Reset button
■
■ Fuses
Programming unit (HO1B):
Easy operation through:
■
– Plain text display with graphic ability
– Large font and black & white depiction for good
contrast
– Context-sensitive help text
With digital time switch
■
Control keys for:
■
– Navigation
– Confirmation
– Help and additional information
– Menu
Setting the:
■
– Standard room temperature
– Reduced room temperature
– DHW temperature
– Heating program
– Time programs for central heating, DHW heating
and DHW recirculation
– Economy mode
– Party mode
– Holiday program
– Heating curves
– Coding addresses
– Actuator tests
– Test mode
Displaying the:
■
– Boiler water temperature
– DHW temperature
– Operating details
– Diagnostic details
– Fault messages