Viessmann VITODENS 242-F Technical Manual page 85

Control units
(cont.)
■ Optolink laptop interface
■ Operating and fault display
■ Reset button
■ Fuses
21°C
14°C
Boiler temperature 48 °C
Programming unit:
■ Easy operation thanks to:
– 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
■ With wireless interface for communication with the following:
– Wireless outside temperature sensor
– Vitotrol 200 RF
– Vitotrol 300 RF
– Vitocomfort 200
– Wireless repeater
■ Operating keys for:
– Navigation
– Confirmation
– Help and additional information
– Menu
■ Adjustment of:
– Room temperature
– Reduced room temperature
– DHW temperature
– Operating 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
VITODENS
HC1
■ Display of:
– Boiler water temperature
– DHW temperature
– Operating data
– Diagnostic details
– Fault messages
■ Available languages:
– German
– Bulgarian
– Czech
– Danish
– English
– Spanish
– Estonian
– French
– Croatian
– Italian
– Latvian
– Lithuanian
– Hungarian
– Dutch
– Polish
– Russian
– Romanian
– Slovenian
– Finnish
– Swedish
– Turkish
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 shutdown con-
trol
■ Adjustment of a variable heating limit
■ Pump anti-seizing protection
■ Frost protection monitoring for the heating system
■ Integral diagnostic system
■ Flow rate monitoring
■ Hydraulic balancing of a heating circuit without mixer and without low
loss header using Vitosoft 300 SID1. In conjunction with service case
for automatic hydraulic balancing (accessories) and the flow rate
sensor installed in the Vitodens.
■ Communication via wireless interface
■ Maintenance display
■ Cylinder temperature controller with priority control
■ In conjunction with solar control module, type SM1 (only for Vitodens
343-F):
– Control of solar DHW heating and central heating backup
– Graphical representation of the solar energy yield
■ Auxiliary function for DHW heating (short-term heating to a higher
temperature)
■ Screed drying program
■ Optional connection for DHW circulation pump to the control unit
■ External starting and blocking (in conjunction with EA1 extension)
■ Capable of communicating via integral LON communication module
The requirements of DIN EN 12831 for calculating the heat load are
met. To reduce the heat-up output, the reduced room temperature will
be raised in case of low outside temperatures. The flow temperature
will be raised for a limited time to reduce the heat-up time after a set-
back phase.
According to the Energy Saving Ordinance [Germany], the tempera-
ture in each room must be individually controlled, e.g. through ther-
mostatic radiator valves.
Control characteristics
PI characteristics with modulating output
7
VIESMANN
85