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L:\Bedienanleitungen\SOREL\DR1\DR1_mb_englisch_100903.p65
Solar Differential Controller DR1
Installation and Operating Instructions
running hours counter / adjustable: solar protection function, storage tank Tmax, degree-accuracy / sensor monitor /
digital LED display / 2-3 PT1000 temperature sensor inputs / 1 relay output with switch-over contact.
1. Description of the Controller
The LEDs on the front panel of the DR1
controller indicate the current
operational status of the system,
whereat the red LED 0 is used as the
standby light and the green LED
displays whether the relay R1 has
switched on the solar pump.
The yellow LED points out that the
temperature at sensor S2 in the solar
storage has exceeded the adjusted value
Tmax.
The temperature values of the connected
2-3 sensors are shown through the
commutator ‘S1 S2 S3’ on the LED display.
The display of service data and the solar
operating hours facilitate the function
control of the controller.
In case of a sensor defect the red LED
flashs a signal!
The required degree-accuracy, the
requested storage temperature and
optionally the switching-on temperature
of the solar protection are adjustable at
three red setting buttons ( potis ).
PT1000 sensor - with guaranteed
degree-accuracy according to DIN
43760 - provide for precise detection of
the temperature difference, which
guarantees the controlled switching
characteristics within the entire operati-
ve range.
Consequently, the conditions for an opti-
mal use of solar energy is ensured with
the DR1 controller.
3. Operating Modes
Through the operating modes switch, the
solar control is manually changeable:
0 = off, Auto = normal operation, = R1 on
Note: The position of the slide switch =
pump continuous operation may only be
switched on under supervision of the
specialist for control or adjustment works
- red LED flashing!
4. Settings
On the back-side of the pluggable
controller module, a red switch is located,
whose arrow is adjusted
to the requested degree-
Examples for application:
2. Description of the Functions
The Controller DR1 compares the
collector temperature at sensor S1 with
the storage temperature at sensor S2. If
the adjusted degree-accuracy S1/S2 is
exceeded, the relay R1 switches the so-
lar pump on to collect the solar heat.
If the degree-accuracy drops below the
half of the adjusted value, the solar pump
is switched off.
If the adjusted Tmax value is exceeded in
the lower storage range at S2, the solar
pump is switched off by R1, independent
of the degree-accuracy.
To extend the service life of the solar
control, the controller DR1 is equipped
with an adjustable solar protection
function. When the selected temperature
value is exceeded at the collector, R1
switches the solar pump on, until the
temperature at the collector has dropped
for 10K. At this it should be noted, that the
storage is heated up over the adjusted
Tmax value!
To protect the storage, the solar protection
function is switched off, if the temperature
at storage sensor S2 has reached 95°C.
Aus
130
110
70
90
Solarschutz S1/°C
T S1- S2 /°C
16
14
12
10
8
6
4
accuracy value S1/S2
of 4-16K by means of a
screwdriver.
( suggestion: 10K )
Through the second switch on the back-
side, the activation of the solar protection
function is specified.
By turning the adjusting
arrow to the left onto ‘off’,
the solar protection
function is switched off.
In the scaled range of
60-130°C, the activation of the solar
protection function is selectable.
( Suggestion: 110°C or ‘off )
After attaching the controller module onto
the base plate, the value for solar storage
charge Tmax of 20-90°C has to be
adjusted. ( suggestion: 60°C )
( hysteresis: 20-39°C=1K, 40-90°C=4K )
5. Service Values
Continuous display through shifting the
operating mode switch to ‘Auto’:
P = parameter resp. adjust values
F = sensor values
H = operating hours of the solar pump.
Subject to technical changes. Illustrations do not claim completeness.
Manufactorer: SOREL GmbH Mikroelektronik, Jahnstraße 36, D-45549 Sprockhövel, Tel.: 0049 23 39 / 60 24, Fax: 0049 23 39/6025
Tmax
R2 0I
Auto
S1 S3S2
20
30
40
50
60
70
80
90
0
DR 1
Tmax
°
C
Differenzregler
S2
S1
R1
S3
R1
S1
S2
1


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