Vitodens 200-W, B2HB 19 to 35 Technical Data
5461 883 - 02
18
Frost protection
■
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 approx. 68°F
(20°C).
The DHW tank will be heated to approx. 68°F (20°C).
■
The frost protection function will be stopped when the
outside temperature rises above approx. 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).
Design and Function
Boiler Control
Control Characteristics
PI characteristics with modulating output.
Time Switch
Digital time switch.
■
Individual and 7-day program
■
Automatic daylight savings time changeover
■
Automatic function for DHW heating and DHW
recirculation pump
■
Time, day and standard switching times for space
heating, DHW heating and the DHW recirculation
pump are factory-set
■
Switching times are individually programmable,
i.e. up to four switching periods per day
Shortest switching interval: 10 minutes
Power backup: 14 days.
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
■
Control of one heating circuit without mixer and two
heating circuits with mixer
■
Demand-dependent heating circuit pump and burner
off control
■
Adjustment of a variable heating limit
■
Anti-seizing pump protection
■
Integral diagnostic system
■
Maintenance display
■
DHW temperature control 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)
■
Slab curing program
■
0-10V External signal input
Setting the Operating Programs
The heating system frost protection (see
frost protection function) applies to all heating programs.
You can select the following heating programs with the
program keys:
■
Heating and DHW
■
DHW only
■
Standby mode
External heating program changeover.
