Technical data

SOLAR
THERMAL
SOLAR
THERMAL
Steca Suntana 2 with heat meter 2 Solar energy systems
2 separate solar energy systemsSystem with 1 storage tank
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System with 2 storage tanks and
pump control
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System with east/west roof,
1 storage tank and pump control
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         
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System with east/west roof,
1 storage tank, valve control and heat meter
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System with 2 storage tanks and
valve control
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    
System with 1 storage tank and heat meter
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V
System with 2 storage tanks,
pump control and heat meter
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    
V
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
    

    
System with 2 storage tanks,
valve control and heat meter

    
V
System with east/west roof, 1 storage tank,
pump control and heat meter

    
V
    

System with east/west roof, 1 storage tank,
valve control and heat meter
    
V
    

kWhCollector
2 st. tank
East/West
1 st. tank
Collector 1 st. tank
215
44
152
74|
Steca Elektronik GmbH | 87700 Memmingen | Germany | Fon [phone] | Fax [phone] | www.stecasolar.com
|75
Steca Elektronik GmbH | 87700 Memmingen | Germany | Fon [phone] | Fax [phone] | www.stecasolar.com
Steca Suntana 2
The microprocessor-controlled Suntana 2 controller is
used for monitoring and controlling of solar thermal en-
ergy systems having two differently aligned collector ar-
rays and a maximum of two domestic hot water and buf-
fer storage tanks. The system parameters and measured
values can be viewed and modified via a 2 x 16-digit me-
nu-driven LCD-Display. 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 me-
ter with pulse output. The integrated hours of operation
logger is used to automatically monitor both controller
outputs and provides extra operational safety for your so-
lar energy system. The controller has a maximum of five
inputs for temperature measurement, a digital pulse in-
put for recording heat volume data, and two outputs for
controlling pumps or a switching valve.
Features
Pump-pump or pump-valve control of:
2-storage tank systems with storage tank priority
switching
2-collector systems with east/west orientation
2 completely separate solar systems
Heat volume meter and hours-of-operation logger
Storage of minimum and maximum temperature
values
Speed control of the solar circuit pump
Menu-driven LCD-Display
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Temperature Differential Controller
Suntana 2
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 relay, 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
INPUTS
6
OUTPUTS
2
INPUTS
6
OUTPUTS
2
Technical data System
examples
Temperature
Differential
Controller
Temperature
Differential
Controller