Design And Function - Viessmann Vitodens 200-W B2HA 100 Technical Data Manual

Boiler Control

Design and Function

Functions
Weather-compensated control of the boiler water
■
and/or flow temperature
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 of solar DHW heating and central heating
■
backup in conjunction with the solar control module,
type SM1
Display of the solar energy yield
■
Auxiliary function for DHW heating (short-term
■
heating to a higher temperature)
Screed drying program
■
External starting and blocking (in conjunction with
■
extension EA1)
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
setback phase.
According to the Energy Saving Ordinance [Germany], the
temperature in each room must be individually controlled,
e.g. through thermostatic radiator valves.
Control characteristics
PI characteristics with modulating output.
Time switch
Digital time switch (integrated into the programming unit)
Individual day and seven-day program
■
Automatic summer/wintertime changeover
■
Automatic function for DHW heating and DHW
■
circulation pump
Time, day and standard switching times for central
■
heating, DHW heating and the DHW circulation pump
are factory-set
Switching times are individually programmable,
■
i.e. up to four switching periods per day
Shortest switching interval: 10 minutes
Power reserve: 14 days
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Vitodens 200-W B2HA 100 to 150 Technical Data
Setting the operating programs
The heating system frost protection (see frost protection
function) applies to all heating programs.
The following heating programs can be selected:
Heating and DHW
■
Only DHW
■
Standby mode
■
External heating program changeover in conjunction
with EA1 extension.
Frost protection function
The frost protection function will be started when the
■
outside temperature drops below approx. 34° F (1° C).
With the frost protection function, the heating circuit
pump will be switched ON and the boiler water is
maintained at a lower temperature of approximately
68° F (20° C). The DHW tank will be heated to
approximately 68° F (20° C).
The frost protection function will be stopped when
■
the outside temperature rises above approximately
37° F (3° C) (default settings).
Summer Operation
Heating program "w"
The burner is only activated upon a call for domestic hot
water from the DHW storage tank (controlled by DHW
tank temperature sensor).