10.1 Solar control module, type SM1, part no. 7429 073
Specification
Functions
■ With output statement and diagnostic system
■ Operation and display via the Vitotronic control unit
■ Heating of 2 consumers via a collector array
■ 2nd temperature differential control
■ Thermostat function for reheating or utilising excess heat
■ Solar circuit pump speed control via pulse pack control or solar circuit
pump with PWM input (make: Grundfos)
■ DHW cylinder reheating by the heat source is suppressed subject to
solar yield.
■ Suppression of reheating for central heating by the heat source in
the case of central heating backup
■ Heat-up of the solar preheating stage (with DHW cylinders from
400 l capacity)
To implement the following functions, also order immersion tempera-
ture sensor, part no. 7438 702:
■ For DHW circulation diversion in systems with 2 DHW cylinders
■ For return changeover between the heat source and the heating
water buffer cylinder
■ For heating additional consumers
Design
The solar control module contains:
■ PCB
■ Terminals:
– 4 sensors
– Solar circuit pump
– KM BUS
– Power supply (on-site ON/OFF switch)
■ PWM output for switching the solar circuit pump
■ 1 relay for switching one pump or one 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
2
(cop-
per)
■ Never route this lead immediately next to 230 V/400 V cables
Cable length
2.5 m
IP rating
IP 32 to EN 60529; ensure
through design/installation
Sensor type
Viessmann NTC 20 kΩ at
25 °C
Permissible ambient temperature
– Operation
−20 to +200 °C
– Storage and transport
−20 to +70 °C
Cylinder 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
2
(cop-
per)
■ Never route this lead immediately next to 230/400 V cables
Cable length
3.75 m
IP rating
IP 32 to EN 60529; ensure
through design/installation
Sensor type
Viessmann NTC 10 kΩ at
25 °C
Permissible ambient temperature
– Operation
0 to +90 °C
– Storage and transport
−20 to +70 °C
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.
Specification
58
180
140
Rated voltage
230 V~
Rated frequency
50 Hz
Rated current
2 A
Power consumption
1.5 W
Safety category
I
IP rating
IP 20 to EN 60529; ensure
through design/installation
Mode of operation
Type 1B to EN 60730-1
Permissible ambient temperature
– Operation
0 to +40 °C use in the living space
or boiler room (standard ambient
conditions)
– Storage and transport
−20 to +65 °C
Rated relay output breaking ca-
pacity
– Semi-conductor relay 1
1 (1) A, 230 V~
– Relay 2
1 (1) A, 230 V~
– Total
Max. 2 A
Delivered condition
■ Solar control module, type SM1
■ Cylinder temperature sensor
■ Collector temperature sensor
Tested quality
CE designation according to current EC Directives
Solar control units
(cont.)
38
VIESMANN
VITOSOL
10
5822 440 GB