50
80
270
360
500
Max. flow rate
m
3
/h
4
Connections
Female thread
or
R
1
Male thread
R
1¼
Control unit
6.1 Vitotronic 200, type HO1A
Structure and functions
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 display
■ Reset button
■ Fuses
Programming unit:
■ Easy operation through:
– Plain text display with graphic ability
– Large font and black/white depiction for good contrast
– Context-sensitive help
– Removable programming unit; can be mounted as option on the
wall with separate accessory
■ With digital time switch
■ Control keys for:
– Navigation
– Confirmation
– Help
– Extended menu
■ Setting the:
– Room temperature
– Reduced room temperature
– DHW temperature
– Heating program
– Time programs for central heating, DHW heating and DHW circu-
lation
– Economy mode
– Party mode
– Holiday program
– Heating curves
– Codes
– Actuator tests
– Test mode
■ Displaying:
– Boiler water temperature
– DHW temperature
– Information
– Operating details
– Diagnostic details
– Fault messages
Functions
■ Weather-compensated control of the boiler water and/or flow tem-
perature
■ Control of one heating circuit without mixer and two heating circuits
with mixer
■ Electronic maximum and minimum temperature limit
■ Demand-dependent heating circuit pump and burner off control
■ Adjustment of a variable heating limit
■ Anti-seizing pump protection
■ Heating system frost protection
■ Integral diagnostic system
■ Maintenance display
■ Cylinder thermostat with priority control
■ Control of solar DHW heating and central heating backup in con-
junction with the solar control module, type SM1 (only with Vitola-
dens 300-W)
■ Display of the solar yield (only with Vitoladens 300-W)
■ Auxiliary function for DHW heating (short-term heating to a higher
temperature)
■ Screed drying program
■ External starting and blocking (in conjunction with extension EA1)
Design information
(cont.)
VITOLADENS 300-W
/
VITOLADENS 333-F
VIESMANN
57
5822 425 GB
6
