Solar Control Module, Type Sm1 - Viessmann VITODENS 200-W Technical Manual

Control units
(cont.)

Solar control module, type SM1

Part no. 7429 073
Specification
Construction
The solar control module contains:
■ PCB
■ Terminals:
– 4 sensors
– Solar circuit pump
– KM BUS
– Power supply (on-site ON/OFF switch)
■ PWM output for controlling the solar circuit pump
■ 1 relay for switching a pump or a valve
Collector temperature sensor
For connection inside the appliance.
On-site extension of the connecting lead:
■ 2-core lead, length up to 60 m with a cross-section of 1.5 mm
per)
■ 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
Cylinder 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
5
per)
■ 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
For systems with Viessmann DHW cylinders, the cylinder temperature
sensor is installed in the threaded elbow (standard delivery or acces-
sory for the respective DHW cylinder) in the heating water return.
Functions
■ Switching the solar circuit pump
■ Solar circuit pump speed control via wave packet control or solar
circuit pump with PWM input (Grundfos)
VIESMANN
66
■ Electronic limiter for the temperature in the DHW cylinder (safety
■ Collector safety shutdown
■ Switching an additional pump or valve via relay
■ Central heating backup is controlled in conjunction with a multi mode
■ Second differential temperature control, thermostat function or aux-
■ Suppression of DHW cylinder reheating by the boiler
■ Suppression of reheating by the boiler with central heating backup
■ Output statement and diagnostic system
The immersion temperature sensor, part no. 7438 702 is required if
the following functions should be realised:
■ Transfer for systems with two DHW cylinders
■ Return changeover between the boiler and the heating water buffer
2 Specification
(cop-
2.5 m
IP 32 to EN 60529; ensure
through design/installation
Viessmann NTC 20 kΩ at
25 °C
−20 to +200 °C
−20 to +70 °C
2
(cop-
Rated voltage
Rated frequency
3.75 m
Rated current
IP 32 to EN 60529; ensure
Power consumption
through design/installation
Safety category
Viessmann NTC 10 kΩ at
IP rating
25 °C
Function
0 to +90 °C
Permissible ambient temperature
−20 to +70 °C
– during operation
– during storage and transport
Rated relay output breaking capaci-
ty
– Semi-conductor relay 1
– Relay 2
– Total
shutdown at 90 °C)
heating water buffer cylinder
iliary function for DHW heating
or
cylinder
0
1 8
5 8
230 V~
50 Hz
2 A
1.5 W
I
IP 20 to EN 60529; ensure
through design/installation
Type 1 B to EN 60730-1
0 to +40 °C use in the living
space or boiler room (standard
ambient conditions)
−20 to +65 °C
1 (1) A, 230 V~
1 (1) A, 230 V~
max. 2 A
VITODENS 200-W