STIEBEL ELTRON SOM WMZ SOL Bedienungsanleitung

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285309-36390-8670_SOM-WMZ-SOL_de_en_fr_nl_sv.indb 1 08.11.2011 09:27:29

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1. General information

The chapter Operation is intended for the user and the heating

contractor.

The chapter Installation is intended for the heating contractor.

Please read carefully.

Read these instructions carefully before using this

appliance and retain for future reference. If the

appliance is passed on to a third party please hand

these instructions to the new user.

1.1 Key

1.1.1 Symbols in these installation instructions:

In this documentation you will come across symbols and highlights

that are deﬁned as follows:

Risk of injury!

Information regarding possible risks of injury for

installer or users and potential equipment damage.

Danger to life through electrocution!

! Risk of damage!

Information regarding potential situations that

bring a risk with them that might occur during

the appliance installation or opearation, the

consequences of which may be equipment damage,

environmental pollution or material loss.

Please read carefully.

Read this section carefully.

»Passages with this symbol "»" indicate step-by-step procedures

you must carry out.

—Passages with this symbol "–" indicate lists.

1.1.2 Symbols on the appliance

This symbol is deﬁned as follows:

Appliance disposal

Appliances with this marking are not suitable for

general waste disposal, and should therefore be

disposed of separately.

OPERATION ____________________________________________ 16

1. General information �� 16

1.1 Key ��16

2. Safety �� 17

2.1 Correct use �� 17

2.2 Safety instructions �� 17

2.3 CE designation �� 17

3. Device description �� 17

3.1 Properties ____________________________________________________ 17

3.2 Functions and properties �� 17

4. Operation �� 18

4.1 Graphic display �� 18

4.2 Control levels ��18

4.3 Operation with keys �� 18

5. Settings and prompts �� 19

6. Display and adjustable parameters �� 19

6.1 Display parameters �� 19

6.2 Adjustable parameters �� 19

6.3 Heat volume �� 19

6.4 Flow and return temperatures �� 19

6.5 Flow rate �� 19

6.6 Output �� 20

6.7 Frost protection �� 20

6.8 Pulse value ��20

6.9 Subaddress �� 21

6.10 BUS mode �� 21

6.11 BUS master �� 21

6.12 Sensor balancing �� 21

6.13 Reset ��22

6.14 Language �� 22

7. What to do if... �� 22

7.1 LED ﬂashing codes at the heat meter �� 22

7.2 Fuses �� 22

INSTALLATION _________________________________________ 23

8. Safety �� 23

8.1 Country-speciﬁc safety information �� 23

8.2 Instructions, standards and regulations �� 23

9. Device description �� 23

9.1 Properties �� 23

9.2 Standard delivery: �� 23

10. Installation location �� 24

10.1 Assembly �� 24

10.2 Fixing ��24

10.3 Electrical connection �� 24

10.4 Hydraulic connection of the meter �� 25

11. Operation with a controller �� 25

11.1 Conversion from master to slave �� 25

11.2 PCB relacement �� 26

12. Connection examples �� 26

12.1 Standalone operation �� 26

12.2 Operation with control unit�� 26

12.3 Cascade without control unit �� 27

12.4 Cascade with control unit �� 27

13. Speciﬁcation �� 27

13.1 Dimensioned drawing �� 27

13.2 Speciﬁcation �� 27

CUSTOMER SERVICE AND WARRANTY _______________ 28

ENVIRONMENT AND RECYCLING ______________________ 29

285309-36390-8670_SOM-WMZ-SOL_de_en_fr_nl_sv.indb 16 08.11.2011 09:27:58

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2. Safety

2.1 Correct use

The heat meter and associated volumeter are designed for

recording heat volumes in standard solar or central heating

systems, ﬁlled with water or glycol/water mixtures, in detached

houses and apartment buildings.

Any other or additional use is inappropriate, for example capturing

process heat, or usage in systems operated with alternative media.

Observation of these instructions is also part of the correct use

of this appliance. Any changes or modiﬁcations to the appliance

void any warranty.

2.2 Safety instructions

Observe the following safety information and instructions.

Only heating contractors should install and commission this

appliance.

The contractor is responsible for adherence to all currently

applicable regulations during installation and commissioning.

Operate this appliance only if it is fully installed and all safety

equipment is ﬁtted.

Risk of injury!

Where children or persons with limited physical,

sensory or mental capabilities are to be allowed

to control this appliance, ensure that this will only

happen under supervision or after appropriate

instructions by a person responsible for their safety.

Children should be supervised to ensure that they

do not play with the appliance.

2.3 CE designation

The CE designation shows that the device meets all the essential

requirements:

—Electromagnetic Compatibility Directive (Council Directive

2004/108/EC)

—Low Voltage Directive (Council Directive 2006/95/EC)

3. Device description

3.1 Properties

The device is a universal heat meter for solar heating systems,

heat pump systems and conventional heating systems.

It is operated by three pushbuttons that navigate a menu, which let

you select different system parameters or switch between control

levels.

Furthermore, a light-emitting diode (LED) serves to display sensor

faults and incorrect sensor connections.

The heat volume calculated and the system parameters set are

saved if a power failure occurs.

3.2 Functions and properties

—Output check

—Improved efﬁciency

—Graphic display

—Protected if power fails

—Easy menu-guided operation

—Easy-to-assemble casing

285309-36390-8670_SOM-WMZ-SOL_de_en_fr_nl_sv.indb 17 08.11.2011 09:27:58

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4. Operation

4.1 Graphic display

The display shows the system diagram and sensors installed. The

r.h. side additionally displays values. The current ﬂow and return

temperatures are always shown on the bottom right.

Graphic display

15 kWh

Heat

85,6 °C

45,7 °C

26�05�21�0026

4.2 Control levels

On the ﬁrst control level, the ﬂow and return temperatures, the

calculated heat volume, and, subject to setting, the current output

or ﬂow rate of the system are displayed.

The second control level displays parameters and programming.

4.3 Operation with keys

The three pushbuttons below the display are used to operate the

device. The right pushbutton is used to scroll forward through the

display menu or to increase the setting values.

The left pushbutton is used to scroll back through the display menu

or to decrease the setting values.

The centre pushbutton is used to switch between display level and

settings level, and for further programming.

4.3.1 Navigating and programming

»Press the centre pushbutton to switch from the display level to

the settings level.

»Select the required parameter with the left or right

pushbutton.

»Brieﬂy press the centre pushbutton.

»Set the required value with the left or right pushbutton.

»Brieﬂy press the centre pushbutton.

»Respond to the subsequent conﬁrmation prompt

"Save?" with "Yes" or "No ". The selection is made with the

left or right pushbutton, and the response with the centre

pushbutton.

To return to the display level, select "back" and brieﬂy press the

left pushbutton.

User interface

2 3

26�05�21�0397

1 Light-emitting diode (LED)

2 "Left" or "decrease"

3 "Right" or "increase"

4 "Conﬁrm"

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5. Settings and prompts

For calculating the heat volume transferred, the heat meter takes

the dependence of the speciﬁc thermal capacity c and the density r

of the temperature and mixing ratio into account (access to saved

values). The heat meter calculates the heat volume transferred using

these parameters, the ﬂow and return temperatures measured by

two precision temperature sensors, and the evaluation of impulses

from a volumeter.

The device can be installed in systems that use water or a water-

glycol mixtures as heat transfer medium. The proportion (in % by

vol.) in a system and the speciﬁcation of the selected volumeter

(in litres per pulse) are adjusted according to the installation of

the device on site.

6. Display and adjustable parameters

6.1 Display parameters

The following parameters can be shown as standard displays:

—VL Flow temperature in °C

—RL Return temperature in °C

—Heat volume in Wh or kWh

—Flow rate in l/h

—Output in kW

6.2 Adjustable parameters

The following parameters can be freely adjusted. The parameters

marked with an asterisk must be checked during commissioning

and matched if necessary.

—Type of anti-freeze*

—Anti-freeze content (display for ethylene only)

—Pulse value

—Subaddress

—BUS mode

—BUS master (display for cascades only)

—Sensor balancing

—Sensor 1

—Sensor 2

—Reset

—Language

—Version

A conﬁrmation prompt follows every parameter alteration. The

new value will not be accepted and saved until the conﬁrmation

prompt has been answered.

Conﬁrmation prompt

Safety prompt:

Save? Yes

26�05�21�0003

6.3 Heat volume

The heat volume calculated by the heat meter is shown on the top

right of the display.

If the heat volume is below 1 MWh, it is stated as Wh.

If the heat volume is above 1 MWh, it is stated as kWh.

Heat volume

15 kWh

Heat

85,6 °C

45,7 °C

26�05�21�0026

6.4 Flow and return temperatures

The current ﬂow and return temperatures are shown in °C on the

bottom right of the display.

The upper value corresponds to the "VL" sensor and show the

current ﬂow temperature (85.6 °C in the example).

The lower value corresponds to the "RL" sensor and show the

current return temperature (45.7 °C in the example).

Flow and return temperatures

15 kWh

Heat

85,6 °C

45,7 °C

26�05�21�0026

6.5 Flow rate

The current ﬂow rate in l/h is shown on the top right of the

display.

Flow rate

200 l/h

Flow

85,6 °C

45,7 °C

26�05�21�0027

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6.6 Output

The current output in kW is shown on the top right of the

display.

The accuracy of the output data is subject to the volumeter used.

At low ﬂow rates, deviations from the actual value are possible

for technical reasons.

Output

9.30 kW

Power

85,6 °C

45,7 °C

26�05�21�0028

6.7 Frost protection

Solar heating systems are generally ﬁlled with a heat transfer

medium since, on the one hand, temperatures > 100 °C can occur

in the solar circuit, and on the other hand to prevent frost damage

to the system in winter.

6.7.1 Setting

Various heat transfer media are available.

Setting options:

—Water

—Ethylene

—H-30L (factory setting)

—H-30LS

Adjust. values:

back

Antifr. type Water

Volume/Imp. 10,0 L/I

Type of frost protection

26�05�21�0006

If glycol or a water/glycol mixtures are used as heat transfer

medium, observe the following information.

6.7.2 H-30L

The anti-freeze is premixed with a mixing ratio of 45% by vol.

6.7.3 H-30LS

The antifreeze is premixed with a mixing ratio of 42% by vol.

6.7.4 Determining the water/glycol ratio

Since the thermal capacity of the heat transfer medium is subject

to the glycol content, ﬁrst determine the glycol:water ratio.

The value in % by vol. can be calculated if the volumes of water

and glycol used in the system are known.

% by vol. = (VG : (VW + VG)) x 100

VG: Volume of glycol

VW: Volume of water

Example:

If there are 15 l water and 20 l glycol in the circuit, the result is:

% by vol. = (20 : (15 + 20)) x 100) = 57

6.7.5 Antifreeze content

The parameter "Antifreeze cont." is only visible if "ETHYLENE" is

selected in advance as the type of antifreeze.

Adjustment options:

Setting range 20% ... 70% by vol.

Factory setting 45%

Adjust. values:

back

Antifr. type Ethylene

Antifreeze 45 %

Antifreeze content

C26�05�21�0030

6.8 Pulse value

This adjustable parameter is subject to the volumeter connected.

Note the unit "l/imp" next to the arrow on the volumeter.

If the volumeter V40 provided is used, the pulse value must be set

to 10.0 litres/impulse.

Setting range 0.1 ... 99.9 l/imp

Adjust. values

back

Antifr. type Water

Volume/Imp. 10,0 L/I

Pulse quality rating

26�05�21�0009

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6.9 Subaddress

To operate several heat meters in one system, every individual

heat meter must be assigned its own subaddress.

The subaddress is set with this parameter. An individual module

address can be set for a single heat meter.

If several heat meters are connected to one PC or datalogger

(max. 16), the heat meters must be numbered in sequence from

zero. Any order at the VBUS® connection is possible.

Setting range 0 ... 15

Adjust. values

Antifr. type Water

Volume/Imp. 10,0 L/I

Subaddress 0

Subaddress

26�05�21�0010

6.10 BUS mode

The BUS mode is set with this parameter.

Adjustment options

—Enabled

—Disabled

—Cascading

6.10.1 Disabled

Never change the factory settings if the SOM WMZ SOL is connected

to a controller with VBUS® output (corresponds to "disabled" BUS

mode).

6.10.2 Enabled

If the SOM WMZ SOL is not connected to a controller and the data

are recorded on a PC or datalogger.

6.10.3 Cascading

If several SOM WMZ SOL are connected to a PC or datalogger. The

SOM WMZ SOL modules are numbered sequentially, beginning

with 0.

Adjust. values

Volume/Imp. 10,0 L/I

Subaddress 0

Bus mode Cascaded

BUS mode

26�05�21�0011

6.11 BUS master

The BUS master only appears at subaddress 0 and in "cascading"

BUS mode.

Adjustment options:

—No

—Yes

Set BUS master "No" if several SOM WMZ SOL are to be used

cascading with one controller.

Set BUS master "Yes" if several SOM WMZ SOL are to be used

cascading without controller.

Adjust. values

Subaddress 0

Bus mode Cascaded

Bus master Yes

BUS master

C26�05�21�0012

6.12 Sensor balancing

To match the sensors to each other, every sensor can be provided

with an individual adjustment.

Adjustment options:

—-5 K ... +5 K, in steps of 0.1 K

Adjust. values

Reset

Sensor 1 0,0 K

Sensor 2 0,0 K

Sensor balancing

C26�05�21�0013

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6.13 Reset

Activating this function resets the captured heat volume to zero.

Adjust. values

Subaddress 0

Bus mode Cascaded

Reset

26�05�21�0014

6.14 Language

This parameter enables a change of the language of the plain

text display.

Adjustment options:

—German

—English

—French

Adjust. values

Sensor 1 0,0 K

Sensor 2 0,0 K

Language English

Language

26�05�21�0015

7. What to do if...

If the heat meter does not function correctly, check the following

points.

7.1 LED ﬂashing codes at the heat meter

—Continuous green: Everything OK

—Red ﬂashing: At least one sensor is faulty

7.2 Fuses

»Check the device power supply.

»Check the fuse on the device PCB.

Fuse

1 2 3 4 5 6

2019

T0,8A

S1 S2

141312

Netz / Mains

220 ... 240 V~

50-60 Hz

VBus

9 10

V40

IP 20

D-37603 Holzminden

SOM WMZ SOL 227729

C26�05�21�0016

1 Fuse 0.8A (slow)

   

-10 961 55 1213

-5 980 60 1232

0 1000 65 1252

5 1019 70 1271

10 1039 75 1290

15 1058 80 1309

20 1078 85 1328

25 1097 90 1347

30 1117 95 1366

35 1136 100 1385

40 1155 105 1404

45 1175 110 1423

50 1194 115 1442

LED is permanently off.

When the LED is extinguished, check the

controller power supply.

OKno

The controller fuse has blown. This is

accessible once the cover is removed and

can then be replaced (a spare fuse can be

found in the accessories bag).

LED ﬂashes red.

Sensor faulty. An error code is displayed

in the appropriate sensor display channel

instead of a temperature.

- 88.8888.8

Lead broken.

Check lead.

Short circuit.

Check lead.

Disconnected PT1000 temperature sensors

can be checked using a resistance meter,

and the resistance readings are as below

for the corresponding temperatures.

Resistance values of

PT1000 sensors

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8. Safety

8.1 Country-speciﬁc safety information

All required steps to complete commissioning must be carried

out by a heating contractor. During this process, these installation

instructions must be observed.

We guarantee trouble-free function and operational reliability

only if the original accessories and spare parts intended for the

device are used.

8.2 Instructions, standards and regulations

! Risk of damage!

Observe the type plate. The stated voltage must

match the mains voltage.

Danger to life through electrocution!

All electrical connection and installation work must

be carried out in accordance with VDE regulations

(DIN VDE 0100) [or local regulations], the rules

of your local power supply utility, and relevant

national and local regulations.

Danger to life through electrocution!

Connection to the power supply is only possible as a

permanent connection.

The device must be able to be separated from the

mains power supply by an isolator that disconnects

all poles with at least 3 mm contact separation.

9. Device description

9.1 Properties

The device is a universal heat meter for solar and conventional

heating systems.

The device particularly allows for the fact that the density and

speciﬁc thermal capacity of the heat transfer medium are subject

to the temperature and the water:glycol ratio. The device calculates

the heat volume using these parameters, the ﬂow and return

temperatures measured by two precision temperature sensors,

and the evaluation of pulses from a volumeter.

The heat volume captured and the system parameters set are

saved if a power failure occurs. It is operated by pushbuttons that

navigate a menu, which let you select different display points or

switch control levels.

The graphic display on the ﬁrst level shows the temperature at

speciﬁc test points, the volume of heat absorbed, the current

output and the system ﬂow rate. Furthermore, a control LED serves

to display sensor faults and incorrect sensor connections.

The second level serves to display system settings and control

values that can be adjusted accordingly if the system characteristics

change.

The device has its own power supply. Further modules can be

connected via a BUS connection. The VBUS® connection enables

all display values to be transferred to a corresponding controller,

PC or datalogger, for further processing or evaluation.

9.2 Standard delivery:

1 x SOM WMZ SOL

1 x spare fuse 0.8A (slow)

2 x screws and rawl plugs

4 x strain relief and screws

2 x PT1000 sensors

2 x sensor wells

1 x volumeter V40

285309-36390-8670_SOM-WMZ-SOL_de_en_fr_nl_sv.indb 23 08.11.2011 09:28:07

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

 

10. Installation location

Install this device in a dry indoor location.

To function correctly, please note that the device must not be

exposed to strong electromagnetic ﬁelds.

Ensure that the heat meter can be isolated from the power supply

by an additional isolator that can separate all poles with at least

3 mm contact separation, or with an isolating facility (fuse) in

accordance with current regulations.

When installing the power cable and the sensor leads, ensure that

they are routed separately.

10.1 Assembly

The device is designed for installation on ﬁnished even and vertical

walls with power connection from below.

»Undo the centre screw and remove the panel.

Device layout

C26�05�21�0020

1 Fascia

2 Display

3 Key

4 Fuse

5 Cable entries with strain relief

10.2 Fixing

»Transfer the two ﬁxing holes onto the wall.

»Drill the holes and insert rawl plugs.

»Insert a screw into the upper hole and turn in until approx. 5 mm

of the screw head protrudes from the wall.

»Hook the device into the gap between the screw head and the

wall, and then fully tighten the screw.

»Position the lower screw and turn in. Ensure that the casing is

not subject to any mechanical stress.

49 110

173

104

155

Fixing points

26�05�01�0147

1 Hook-in aperture

2 Fixing hole

10.3 Electrical connection

The electrical connection is made according to the following wiring

diagram.

1 2 3 4 5 6

2019

T0,8A

S1 S2

141312

Netz / Mains

220 ... 240 V~

50-60 Hz

VBus

9 10

V40

IP 20

D-37603 Holzminden

SOM WMZ SOL 227729

Fixing points

C26�05�21�0016

1 Fuse

2 Sensor terminals

3 VBUS connection

4 Mains power

5 Earth terminals

Provide the heat meter with power via an external main isolator.

Secure the ﬂexible cables/leads to the casing using the strain relief

provided and the appropriate screws.

The following connection allocation applies to a heat meter used

in conjunction with a volumeter (any polarity of the individual

terminals):

—1 / 2 = Sensor ﬂow temperature

—3 / 4 = Sensor return temperature

—5 / 6 = Flow meter

—9 / 10 = VBUS®

—19 = N - neutral conductor

—20 = L - phase

—12...14 = PE, earth terminals

285309-36390-8670_SOM-WMZ-SOL_de_en_fr_nl_sv.indb 24 08.11.2011 09:28:08

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