Viessmann Solar Controls Flyer TopInfo

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Solar System Controls and Accessories

The SCU solar system control series offers

options for any type of system, from basic single-

load installations to complex multi-load systems

with demanding requirements. With their large

LCD displays, SCU controls are user-friendly and

provide industry leading solar system safety,

performance and effi ciency.

All controls incorporate variable speed pump

control, preprogrammed confi gurations, collector

glycol cooling function, heat rejection loop control,

energy meter and VBus accessories. The SCU

345 control also provides data logging to an

internal SD memory card, and an optional SEM

fl ow meter kit can be added for precise energy

metering or used as a standalone unit.

To p Info

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

New

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.

New

New

Model SCU 124 SCU 224 SCU 345

Relay outputs 2 2 4

Variable speed pump 

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 

Energy meter 

Pump hour counter 

Collector cooling 

Night tank cooling 

V-Bus accessories 

Internal SD card _ _ 

Flowmeter option _ _ 

Control Section Guide

Solar Energy Meter

With input from the V40 Flowmeter and two system

sensors, the Solar Energy Meter (SEM) records the

energy yield and fl owrate produced by your solar

system. Heat quality calculations displayed on the

large screen are also stored in the internal memory

or transmitted to the Datalogger or PC using VBus

communication.

*Field supplied.

Solar Energy Meter

New

s

s

M

s

s

s

Vitosol solar collector

Solar-Divicon

V40 Flowmeter Kit

Temperature sensor

Vitocell solar tank

Motorized diverting valve

SCU 345 control

VBus/PWM Interface

Smart Display

Datalogger

Internet

PC

2

7

1

6

3

8

4

9

5

10

11

12

1

3

4

4

4 4 4

5 5

6

7

8 9

10

11

12

2

VBus/PWM Interface Adaptor allows for

control of a high effi ciency pump.

Smart Display shows collector and tank

temperature and energy production in

real time.

Datalogger stores 180 MB of operational

details. SD card* or ethernet for data

extraction.

Sample System Layout — with optional accessories shown

SCU Control Accessories

Technical information subject to change without notice.

9440 428 v1.0 08/12 Printed in Canada

Viessmann Manufacturing

Company Inc.

Waterloo, ON Canada

1-800-387-7373

www.viessmann.ca

Viessmann Manufacturing

Company (U.S.) Inc.

Warwick, RI U.S.A.

1-800-288-0667

www.viessmann.us

®

®

V40 Flowmeter Technical Data

Flow rate

1400

0.5 200

0.1 40

0.05 30

0.01 4

0.1

0.44

0.5

V40-15

2.2

1

V40-25

4.4

3

13.2

5 m³/h

22 usgpm

0.3

V40-06

1.3

Pressure loss " w.c.

Pressure loss in bar

Flowmeter Pressure Loss Curve

Flowmeter Sizing

Three Flowmeter Kit sizes available; fl owmeter must be sized to

match fl ow rate of system.

Flowmeter Model V40-06 V40-15 V40-25

Minimum fl ow rate 0.1

usgpm

0.3

usgpm

0.5

usgpm

Maximum practical

fl ow rate

recommended

2.4

usgpm

5.3

usgpm

9.7

usgpm

Maximum number

of Vitosol Flat Plate

Solar Collectors

61424

Maximum number

of Vitosol Vacuum

Tube Solar Collectors

90 180 360

Pressure loss at

maximum

recommended

fl ow rate

80“

w.c.

80“

w.c.

80“

w.c.

V40 Flowmeter Kit