Design
■ PCB
■ Terminals for:
– 3 sensors
– Solar circuit pump
– PlusBus
– Power supply
■ PWM output for switching the solar circuit pump
■ 1 relay for switching a transfer pump
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
(copper)
■ Never route this lead immediately next to 230/400 V cables.
Specification – collector temperature sensor
Lead length
2.5 m
IP rating
IP 32 to EN 60529; ensure through de-
sign/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
(copper)
■ Never route this lead immediately next to 230/400 V cables.
Specification – cylinder temperature sensor
Lead length
3.75 m
IP rating
IP 32 to EN 60529; ensure through de-
sign/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 tempera-
ture sensor is installed in the threaded elbow in the heating water
return (standard delivery or accessory for the respective DHW cylin-
der).
Specification – EM-S1 extension
Rated voltage
230 V~
Rated frequency
50 Hz
Rated current
2 A
Power consumption
1.5 W
Protection class
I
IP rating
IP 20 to EN 60529, ensure through de-
sign/installation.
Function type
Type 1B to EN 60730-1
Permissible ambient temperature
– Operation
0 to +40 °C, use in the living space or
boiler room (standard ambient condi-
tions)
– Storage and transport
–20 to +65 °C
Rated relay output break-
ing capacity
1 A, 230 V~
58
180
140
Delivered condition
■ EM-S1 extension
■ Cylinder temperature sensor
■ Collector temperature sensor
Functions
Cylinder temperature limit
The solar circuit pump will be switched OFF if the set cylinder tem-
perature is exceeded.
Collector emergency stop
In order to protect the system components, the solar circuit pump is
switched off if the adjustable collector limit temperature is exceeded.
In the Vitosol-FM and 300-TM switching collectors, the collector tem-
perature limit can be set to 145 °C. To do so, please comply with the
manufacturer system pressure specification. This enables solar cir-
cuit pump operation even when the system is shut down.
Ensure the following:
■ The components in the solar circuit flow line must be designed for
a temperature of 145 °C.
■ The return line temperature must not exceed 120 °C.
Minimum collector temperature limit
If the actual temperature falls below the minimum collector tempera-
ture, the solar circuit pump is shut down.
Frost protection function
Viessmann collectors are filled with Viessmann heat transfer
medium. This function does not have to be activated.
Activate only when using water as the heat transfer medium.
With a collector temperature below +5 °C, the solar circuit pump will
be started to avoid damage to the collectors. The pump is stopped
when a temperature of +7 °C is reached.
Heat statement
When determining thermal yields, the difference between the collec-
tor and cylinder temperature, the set throughput, the type of heat
transfer medium and the operating time of the solar circuit pump are
taken into account.
Reheating suppression
DHW cylinder reheating by the boiler is suppressed in 2 stages.
During solar heating of the DHW cylinder, the set cylinder tempera-
ture is reduced. Suppression remains active for a certain time after
the solar circuit pump is switched off.
If solar heating is uninterrupted (> 2 h), reheating by the boiler only
occurs if the temperature falls below the 3rd set DHW temperature,
as set at the boiler control unit (in parameter "1394.0") (setting range
10 to 95 °C). This value must be
below
the 1st set DHW tempera-
ture.
If the solar thermal system is unable to maintain this set value, the
DHW cylinder is heated by the boiler (solar circuit pump running).
Control unit
(cont.)
VITODENS
VIESMANN
149
5853906
9
Содержание Vitodens 200-W B2HE
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