Technical data

SOLAR
THERMAL
SOLAR
THERMAL
Solid fuel 1 st. tankCollector 1 st. tank
kWh BHFCollector 1st. tank
72|
Steca Elektronik GmbH | 87700 Memmingen | Germany | Fon [phone] | Fax [phone] | www.stecasolar.com
|73
Steca Elektronik GmbH | 87700 Memmingen | Germany | Fon [phone] | Fax [phone] | www.stecasolar.com
Steca Suntana
The Suntana solar thermal controller is another member
of our solar controller family. The controller monitors
and controls solar thermal energy systems with a collec-
tor array, a storage tank and alternatively with an appro-
priate back-up heating or circulation pump. Apart from
controlling the solar system, the controller also performs
important system monitoring and safety functions. The
system parameters and measured values can be viewed
and modified via a 2 x 16-digit menu-driven LCD-Dis-
play. The amount of solar energy fed from the collector
array into the storage tank can be read from the LCD-
Display at any time, thanks to a flow meter with pulse
output. The controller has a maximum of five inputs for
temperature measurement, a digital pulse input for recor-
ding heat volume data, and two outputs for controlling
pumps. A programmable timer with selectable switching
times for controlling a solar circuit pump is integrated
into the unit. Installation mistakes are avoided from the
very beginning through the automatic recognition of the
temperature sensors. The components delivered with the
controller include a collector temperature sensor and two
storage tank sensors.
Steca Sundra
The solar thermal controller is used for monitoring and
controlling of solar thermal energy systems having a coll-
ector array and a storage tank. Apart from controlling
the solar system, the controller also has important system
monitoring and safety functions. This controller satisfies
all the requirements of a solar thermal system. The sy-
stem parameters and measured values can be viewed and
modified via a 16-digit LCD-Display. The controller has
two inputs for temperature measurement and an output
for controlling a speed controlled solar pump. Installati-
on mistakes are avoided by the automatic recognition of
temperature sensors by the controller. The components
delivered with the controller include a collector tempe-
rature sensor and a storage tank temperature sensor in
the lower part of the storage tank to allow limiting of the
maximum storage tank temperature. Alternatively, the
controller can be used for loading a domestic hot water
or buffer tank through a solid fuel or multifuel burning
stove.
Features
Easy operation by menu-driven LCD-Display
Software-controlled collector cooling function
Speed control of solar circuit pump
Limitation of storage tank temperature
Temperature sensor monitoring and fault analysis
Logging of solar circuit pump operating hours
Minimum and maximum displays of the storage tank
and collector temperatures
Automatic recognition of the Pt1000 or KTY tempera-
ture sensors
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215
44
152
Temperature Differential Controller Sundra
System voltage 230 V (± 15 %), 50 Hz
[optional 115 V (± 15 %), 60 Hz]
Max. own consumption ≤ 1 W
Inputs 2
2 x temperature determination
(Pt1000 or KTY81-210)
Output 1
1 x R1 triac for speed control,
max. 200 W [230 V]
Turn-on temperature difference 4 ...17 K
Turn-off temperature difference 2 ...15 K
Operation temperature range 0 °C ...+45 °C
Display LCD-Display
Protection class IP 20 / DIN 40050
Weight 460 g
Dimensions l x w x h 150 x 215 x 44 mm
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System with solid fuel
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System with 1 storage tank
INPUTS
2
OUTPUT
1
INPUTS
6
OUTPUTS
2
Features
Easy operation by menu-driven LCD-Display
Time and temperature dependent control of circulati-
on control
Adjustable cooling and back-up heating function
Software-controlled collector cooling function
Speed control of solar circuit pump
Limitation of storage tank temperature
Temperature sensor monitoring and fault analysis
Logging of solar circuit pump operating hours
Minimum and maximum displays of the storage tank
and collector temperatures
Automatic recognition of the Pt1000 or KTY tempera-
ture sensors
Measurement and logging of heat volumes
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215
44
152
Temperature Differential Controller
Suntana
System voltage 230 V (± 15 %), 50 Hz
[optional 115 V (± 15 %), 60 Hz]
Max.own consumption ≤ 1 W
Inputs 6
5 x temperature determination
(Pt1000 or KTY81-210)
1 x pulse detection for calorimetry
Outputs 2
1 x R1 triac for speed control,
max. 200 W [230 V]
1 x R2 switch output,
max. 800 W [230 V]
or R2 voltage free
Turn-on temperature difference 4...17 K
Turn-off temperature difference 2...15 K
Operation temperature range 0 °C...+45 °C
Display LCD-Display
Protection class IP 20 / DIN 40050
Weight 490 g
Dimensions l x w x h 150 x 215 x 44 mm
System with 1 storage tank and
circulation function
System examples
System with 1 storage tank
System with 1 storage tank and
heat meter
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V
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System with 1 storage tank and back-up
heating function
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Technical data
System examples
Technical data
Temperature
Differential
Controller
Temperature
Differential
Controller