Specification Vitotronic 200, Type Ho1A; Solar Control Module, Type Sm1 - Viessmann VITODENS 242-F Technical Manual

Control units
(cont.)
Heating systems with low loss header
When using a hydraulic separation (low loss header), connect a tem-
perature 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
Sensor type
Permissible ambient temperature
– during operation
– during storage and transport
Cylinder temperature sensor
For Vitodens with primary store or solar cylinder also an additional
outlet temperature 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
Outside temperature sensor
Installation location:
■ North or north-western wall of the building
■ 2 to 2.5 m above the ground, for multi-storey buildings in the upper
half of the second floor

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
Electronic temperature
limiter setting (heating
mode) 82 °C (change not possible)

Solar control module, type SM1

7
Included in the standard delivery of the Vitodens 242-F.
Construction
The solar control module contains:
■ PCB
■ Connection terminals for:
– 2 sensors
– Solar circuit pump
– KM BUS
– Power supply (on-site ON/OFF switch)
■ PWM output for controlling the solar circuit pump
The standard delivery includes collector temperature sensor and cyl-
inder temperature sensor.
VIESMANN
84
Connection:
■ 2-core lead, length up to 35 m with a cross-section of 1.5 mm
■ Never route this lead immediately next to 230/400 V cables
Viessmann NTC, 10 kΩ at
25 °C
0 to +130 °C
-20 to +70 °C
Specification
IP 32
IP rating
Viessmann NTC 10 kΩ at
25 °C
Sensor type
0 to +90 °C
–20 to +70 °C
Permissible ambient temperature during
operation, storage and transport
Setting range for the
DHW temperature
– Vitodens with pri-
– Vitodens with DHW
Heating curve setting
range
Slope
Level
Collector temperature sensor
For connection inside the appliance.
On-site extension of the connecting lead:
■ 2-core lead, length max. 60 m with a cross-section of 1.5 mm
■ Never route this lead immediately next to 230/400 V cables
Lead length
IP rating
Sensor type
Permissible ambient temperature
– during operation
– during storage and transport
per).
7 9
5 0
mary store 10 to 63 °C
cylinder with internal
indirect coil 10 to 68 °C
0.2 to 3.5
–13 to 40 K
per)
2
(cop-
IP 43 to EN 60529;
ensure through appropri-
ate design/installation
Viessmann NTC 10 kΩ at
25 °C
-40 to +70 °C
2
(cop-
2.5 m
IP 32 to EN 60529; ensure
through design/installation
NTC 20 kΩ at 25 °C
-20 to +200 °C
-20 to +70 °C
VITODENS