Viessmann VITOPEND 100 WH0A Datasheet Download

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Demand-dependent heating circuit pump and burner OFF con-
trol

Adjustment of a variable heating limit

Anti-seizing pump protection

Heating system frost protection

Integral diagnostics system

Maintenance display

Integral DHW heating

Screed drying program

External starting and blocking (accessories)

The requirements of DIN EN 12831 for heating load calculation
are met. To reduce the heat-up load, the night setback is reduced
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
period.
According to the Energy Savings Order [Germany], the tempera-
ture 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

Day and week program, annual calendar

Automatic summer/winter time 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 backup: 5 years

Setting the heating 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 in conjunction with an
external extension H1 or H2.

Frost protection function

The frost protection function will be started when the outside
temperature drops below approx. +1 °C.
With active frost protection, the heating circuit pump will be
switched ON and the boiler water is maintained at a lower tem-
perature of approx. 40 °C.

The frost protection function will be switched OFF when the out-
side temperature rises above approx. +3 °C.

Summer mode

Heating program "

The burner starts only when the DHW cylinder needs to be heated
up again.

Adjusting the heating curves (slope and level)

The Vitotronic 200 controls the boiler water temperature (= flow
temperature of the heating circuit without mixer)

and

the flow tem-

perature of the heating circuit with mixer (in conjunction with the
extension kit for one heating circuit with mixer) subject to outside
temperature. The boiler water temperature is automatically
boosted by between 0 and 40 K higher than the currently required
set flow temperature (delivered condition 8 K).
The flow temperature required to reach a specific room tempera-
ture depends on the heating system and the thermal insulation of
the building to be heated.

Adjusting both heating curves matches the boiler water tempera-
ture and the flow temperature to these operating conditions.
Heating curves:
The upper boiler water temperature is limited by the temperature
limiter and the temperature set at the electronic maximum thermo-
stat.
The flow temperature cannot exceed the boiler water temperature.

Heating systems with low loss header

When using a hydraulic separation (low loss header), connect a
temperature sensor for use in the low loss header.

Boiler water temperature sensor

The boiler water temperature sensor is connected to the control
unit and built into the boiler.

Specification

Permissible ambient temperature

–

during operation

0 to +130 °C

–

during storage and transport

-20 to +70 °C