Heat Pump Control Unit 4. 1 Vitotronic 200, Type Wo1A; Structure And Functions; Time Switch - Viessmann VITOCAL 300-G Technical Manual

Heat pump control unit
4.1 Vitotronic 200, type WO1A

Structure and functions

Modular structure
The control unit is integrated into the heat pump.
The control unit comprises a standard unit, electronics modules and a
programming unit.
Standard unit:
■ ON/OFF switch
■ Optolink laptop interface
■ Operating and fault display
■ Fuses
Flow temperature
Heating/cooling
DHW
Solar energy
Information
Select with
Programming unit:
■ Easy operation through:
– Plain text display with graphic ability
– Large font and black & white depiction for good contrast
– Context-sensitive help
– Integral control of the solar thermal system in heat pumps with
solar connection
– Removable programming unit; can be mounted on the wall with
separate accessory
■ With digital time switch
■ Control keys for:
– Navigation
– Confirmation
– Help
– Extended menu
■ Setting the:
– Standard and reduced room temperature
– Standard and second DHW temperature
– Operating program
– Time programs for central heating, DHW heating, DHW circulation
and heating water buffer cylinder
– Economy mode
– Party mode
– Holiday program
– Heating and cooling curves
– Codes
– Actuator tests
■ Displaying:
– Flow temperature
– DHW temperature
– Information
– Operating details
– Diagnostic details
– Information, warning and fault messages

Time switch

Digital time switch
VITOCAL 300-G
40°C
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Functions
■ Weather-compensated control of flow temperatures for heating or
cooling mode:
– System flow temperature or flow temperature of heating circuit
without mixer A1
– Flow temperature heating circuit with mixer M1
– Flow temperature of heating circuit with mixer M2 in conjunction
with the extension kit for one heating circuit with mixer
– Flow temperature, separate cooling circuit
■ Electronic maximum and minimum temperature limit
■ Demand-dependent shutdown of the heat pump and pumps for pri-
mary and secondary circuits
■ Adjustment of a variable heating and cooling limit
■ Anti-seizing pump protection
■ Heating system frost protection
■ Integral diagnostic system
■ Cylinder thermostat with priority control
■ Auxiliary function for DHW heating (short-term heating to a higher
temperature)
■ Control of a heating water buffer cylinder
■ Control of an instantaneous heating water heater
■ Screed drying program
■ Control for swimming pool water heating in conjunction with external
extension H1 (accessory)
■ External hook-up: Mixer OPEN, mixer CLOSED, operating mode
changeover
■ External demand (set flow temperature adjustable) and heat pump
blocking; set flow temperature specified via external 0 to 10 V signal
(with external extension H1, accessory)
■ Data communication:
– Remote operation, remote setup and remote monitoring of the
heat pump and heating system with Vitocom 300. Operation via
the Vitodata 100 webserver integrated into the Vitocom, or via the
central Vitodata 300 webserver with the additional option to con-
figure all control parameters.
Connection to the heat pump control unit via LON (with LON com-
munication module, accessory)
– Remote monitoring and remote operation via GSM phone net-
works with Vitocom 100
Connection to the heat pump control unit via KM BUS
The requirements of EN 12831 for calculating the heat load are met.
To reduce the heat-up output, the "Reduced" operating status is
switched to the "Standard" operating status if outside temperatures are
low.
According to the Energy Savings Order [Germany], the temperature in
each room must be individually controlled, e.g. through thermostatic
radiator valves.
■ Individual and 7-day program
■ Automatic summer/winter time changeover
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