Control Units 7.1 Vitotronic 100, Type Hc1B, For Constant Temperature Operation; Layout And Functions - Viessmann VITODENS 300-W Technical Manual

Control units
7.1 Vitotronic 100, type HC1B, for constant temperature operation

Layout and functions

Modular structure
The control unit is integrated into the boiler.
The control unit comprises a standard unit, electronics modules and a
programming unit.
Standard unit:
■ ON/OFF switch
■ Optolink laptop interface
■ Operating and fault indicators
■ Reset button
■ Fuses
s
Programming unit:
■ Easy operation through display with large font and depiction with
good contrast
■ Removable programming unit; can be mounted as option on the wall
with separate accessory
■ Menu prompts through pictograms
■ Operating keys for:
– Navigation
– Confirmation
– Settings/menu
■ Settings:
– Boiler water temperature
– DHW temperature
– Operating program
– Codes
– Actuator tests
– Test mode
■ Displaying:
– Boiler water temperature
– DHW temperature
– Operating data
– Diagnostic details
– Fault messages
7
Functions
■ Electronic boiler control unit for operation at a constant boiler water
temperature
■ Room temperature-dependent operation requires a Vitotrol 100,
type UTA, UTDB or UTDB-RF (according to EnEV [Germany])
■ Heating system frost protection
■ Anti-seizing pump protection
■ Integral diagnostic system
■ Cylinder thermostat with priority
■ Control of solar DHW heating and central heating backup in con-
junction with the solar control module, type SM1
■ Auxiliary function for DHW heating (short-term heating to a higher
temperature)
■ Maintenance display
■ External starting and blocking (in conjunction with extension EA1)
VIESMANN
78
°C
4 8
A
Control characteristics
PI characteristics with modulating output.
Setting the heating 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
Frost protection function
The frost protection function is active in all heating programs.
The burner is switched ON at a boiler water temperature of 5 ºC and
will be switched OFF again at a boiler water temperature of 20 ºC.
The circulation pump will be switched ON simultaneously with the
burner and switched OFF after a delay.
The DHW cylinder will be heated to approx. 20 ºC.
To protect the system against frost, the circulation pump may be star-
ted at certain intervals (up to 24 times per day) for periods of approx.
10 minutes.
Summer mode
Operating program "w"
The burner starts only when the cylinder needs reheating or when
DHW is drawn from a combi boiler.
Boiler water temperature sensor
The boiler water temperature sensor is connected to the control unit
and built into the boiler.
Specification
Sensor type
Permissible ambient temperature
– during operation
– during storage and transport
Cylinder temperature sensor
Standard delivery for:
■ Connection set for DHW cylinders below the boiler (120 or 150 litres)
(order separately)
■ Connection set for DHW cylinders adjacent to the boiler (160 to 400
litres) or alternative DHW cylinders (order separately)
Specification
Cable length
IP rating
Sensor type
Permissible ambient temperature
– during operation
– during storage and transport
Cylinder temperature sensor (Vitodens 222-W) and outlet tem-
perature sensor
These sensors are connected to the control unit and built into the boiler
or cylinder.
Specification
IP rating
Sensor type
Permissible ambient temperature
– during operation
– during storage and transport
Viessmann NTC, 10 kΩ at
25 °C
0 to +130 °C
–20 to +70 °C
3.75 m, fully wired
IP 32
Viessmann NTC 10 kΩ at
25 °C
0 to +90 °C
–20 to +70 °C
IP 32
Viessmann NTC 10 kΩ at
25 °C
0 to +90 °C
–20 to +70 °C
VITODENS