Specification Vitotronic 200, Type Ho1A; 5.3 Vitotronic 300-K, Type Mw2 For Multi-Boiler Systems; Cascade Control Unit For The Vitodens 200-W With A Vitotronic 100; Construction And Function - Viessmann VITODENS 200-W Technical Manual

Control units
(cont.)

Specification Vitotronic 200, type HO1A

Rated voltage 230 V~
Rated frequency 50 Hz
Rated current 6 A
Protection class I
Permissible ambient
temperature
– during operation 0 to +40 °C
Installation in living spaces or boiler rooms
(standard ambient conditions)
– during storage and
transport –20 to +65 °C

5.3 Vitotronic 300-K, type MW2 for multi-boiler systems

Cascade control unit for the Vitodens 200-W with a Vitotronic 100

Weather-compensated, digital cascade and heating circuit control
unit
■ for multi-boiler systems up to 4 Vitodens 200-W
■ with boiler sequence strategy
■ for one system circuit and up to two heating circuits with mixer. Up
to a further 32 Vitotronic 200-H heating circuit control units can be
connected via the LON BUS (LON module required; accessory)
■ for modulating operation in conjunction with the Vitotronic 100, type
HC1A
■ with cylinder temperature control unit or control unit of a primary
store system with mixer assembly

Construction and function

Modular structure
The control unit comprises a standard unit, electronics modules and a
programming unit.
Standard unit:
5
■ ON/OFF switch
■ Emissions test switch
■ Optolink laptop interface
■ Operation and fault displays
■ Plug connection chamber
– Connection of external equipment via a system plug
– Plug the connectors directly into the front of the open control unit
– Connection of three-phase consumers via additional contactors
Programming unit:
■ With digital time switch
■ Backlit display with plain text support
■ Adjustment and display of temperatures and codes
■ Fault message display
■ Rotary selector for the temperature in standard mode
■ Keys:
– Temperature for reduced mode
– Program selection
– Holiday program
– Party and economy mode
– DHW temperature
– Heating circuit curves for system flow temperature and heating
circuit flow temperature
– Heating circuit selection
Functions
■ Weather-compensated regulation of the system/boiler water tem-
perature in a multi-boiler system with up to 4 Vitodens 200-W with
Vitotronic 100, type HC1A (modulating) and the flow temperature of
the heating circuits with mixer
■ Control of the Vitotronic 100, type HC1A of the boilers in accordance
with a boiler sequence strategy which can be freely selected
VIESMANN
40
Electronic temperature
limiter setting (heating
mode) 82 °C (change not possible)
Setting range for the 10 to 68 °C
DHW temperature
Heating curve setting
range
Slope 0.2 to 3.5
Level –13 to 40 K
■ capable of communicating via the LON BUS (LON communication
module and terminators are available as accessories)
■ with integral diagnostic system.
Note
For higher interference protection, connect all boilers with the
Vitotronic 100 and the Vitotronic 300-K cascade control unit to the
same phase.
■ Electronic maximum temperature limiter
■ Demand-dependent heating circuit pump shutdown
■ Adjustment of a variable heating limit
■ Anti-seizing pump protection
■ Central fault message
■ Integral diagnostic system
■ Adaptive cylinder thermostat with priority (heating circuit pump OFF,
mixer closed)
■ Auxiliary function for DHW heating (short-term heating to a higher
temperature)
■ Control unit of a primary store system with a regulated 3-way mixing
valve
■ Screed drying, for underfloor heating systems
The requirements of DIN EN 12831 for the heating load calculation are
met. To reduce the heat-up load, 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 period.
According to the Energy Savings Order [Germany], the temperature in
each room must be individually controlled, e.g. through thermostatic
radiator valves.
VITODENS 200-W