30
System layout 10
Arr 10
VBus
10
9
The controller calculates the temperature difference between
collector sensor S1 and tank sensor S2. If the difference is
larger than or identical to the adjusted switch-on temperature
difference (DT O), the solar pump will be operated by relay 1,
and the tank will be loaded until the switch-off temperature
difference (DT F) or the maximum tank temperature (S MX)
is reached.
If the maximum collector temperature (CMX) is reached, the
solar pump will be operated by relay 1 and the 3-way-valve will
S1
S2
S4 / TR
R1
S3
R2
Display Channels
Channel
Description
Terminal
Page
COL
x
Temperature collector
S1
37
TST
x
Temperature tank
S2
37
S3
x
Temperature sensor 3
S3
37
S4
x
Temperature sensor 4
S4
37
TR
x*
Temperature return sensor
S4
37
n %
x
Pump speed relay
R1
30
h P1
x
Operating hours R1
R1
38
h P2
x
Operating hours R2
R2
38
kWh
x*
Heat quantity kWh
-
38
MWh
x*
Heat quantity MWh
-
38
TIME
x
Time
-
34
be operated by relay 2 in order to direct the surplus energy to a
heat dump. For security purpose this will be carried out only if
the tank temperature is below the non-adjustable emergency
shutdown of 200 °F.
Sensors S3 and S4 can optionally be connected for
measurement purposes.
If energy metering (OHQM) is activated, sensor S4 has to be
connected as return sensor.
Summary of Contents for SOM 7 PLUS
Page 51: ...51...