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Solar System Controls and Accessories
SCU 124/SCU 224 solar system controls for
basic single- and multi-load systems
The SCU 124 and SCU 224 solar system
controls are ideal for basic systems with
two semiconductor relay outputs and four
sensor inputs. The single-load SCU 124
control features three basic, preprogrammed
system confi gurations for easy planning and
installation. For basic multi-load systems or
east-west collector arrays, the SCU 224 control
is an ideal choice. It features an additional
delta-T for control of second relay, as well as
10 preprogrammed system confi gurations for
ultimate installation fl exibility.
SCU 345 solar system control for multi-load,
east-west and commercial arrays
The SCU 345 is an advanced solar system
control for multi-load systems, east-west
collector arrays and commercial solar systems.
This advanced solar system control features
four relay outputs and adjustable delta-T
and time controlled thermostat functions for
limitless confi guration possibilities. The SCU
345 control is compatible with a number of
system accessories designed for system
monitoring, analytics and additional control
.
TopInfo
V40 Flowmeter Kit includes two
sensors and two sensor wells.
For use with SCU 345 or SEM.
*Field supplied.
SCU 124/SCU 224 Solar System Control
SCU 345 Solar System Control
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SD
SD
With SD card capabilities*, the
SCU345 control allows you to
view system data on your PC.
Adjustable logging intervals from
one second to 20 minutes.
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Model
SCU 124 SCU 224 SCU 345
Relay outputs 2 2 4
Variable speed pump
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Sensor inputs 4 4 5
System confi gurations 3 10 9
Number of heat loads (tanks) 1 2 3
Number of differentials 1 2 3
Heat dissipater layout
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Energy meter

Pump hour counter

Collector cooling
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Night tank cooling

V-Bus accessories
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Internal SD card _ _

Flowmeter option _ _

Control Section Guide