STIEBEL ELTRON SOM7SI User Manual

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SOM 7 SI

Installation, Conﬁguration and Troubleshooting Manual

Thanks for buying this product. Read this manual carefully to get the best perfomance from this unit.

*49004470*

49004470

SOM 7 SI

manual

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SOM 7 SI

Contents

Imprint

Safety regulations ................................................................2

Technical data and overview of functions ........................3

1. Installation .............................................................4

1.1 Mounting .................................................................................. 4

1.2 Electrical Connection ........................................................... 4

1.2.1

1.2.2 Standard Solar System .......................................................... 5

1.2.3 Solar System with Heat Exchange .....................................6

1.2.4 Solar System with After-Heating ........................................ 6

1.2.5 Solar System with Layered Tank Charge ........................... 7

1.2.6 2 Tank Solar System with Valve Logic ................................ 7

1.2.7 2 Tank Solar System with Pump Logic ............................... 8

1.2.8 Solar System with East-West Collectors ......................... 8

1.2.9 Solar System with After-Heating by Solid Fuel Boiler ... 9

1.2.10 Solar system with heating circuit return ﬂow incr..........9

2. Opearation and function ....................................10

Data communication / Bus ............................................. 5

2.1 Adjustment buttons ............................................................ 10

2.2 System monitoring display ................................................. 10

2.2.1 Channel indication ...............................................................10

2.2.2 Tool bar .................................................................................. 10

2.2.3 System screen ....................................................................... 11

2.3 Blinking codes ....................................................................... 11

2.3.1 System-Screen Blinking codes ........................................... 11

2.3.2 LED blinking codes .............................................................. 11

3. Primary commissioning ......................................12

4. Control parameter and display channels ..........13

4.1 Channel overview ................................................................13

4.1.1-6 Indication channels ..............................................................15

4.1.6-21 Adjustment channels ........................................................... 16

4.2 Recommended Settings .....................................21

5. Troubleshooting Tips

6. Warranty..............................................................28

...........................................23

Safety regulations:

Please read the following information carefully before installing and operating the controller. When conﬁguring the controller please change the default settings as illustrated in section 4.2. This will avoid damage to the solar system by common problems such as overheating. Installing the

controller using the default settings without making any adjustments to the conﬁguration parameters is likely to result in an overheating condition of the solar system at some point. Please also note that changing the system scheme (Arr 1 - 9) will reset all settings to the defaults. Please ensure that the mounting

is in accordance to local, state and federal regulations.

CU 72060171 01 UL 60730-1A:2002 CSA E60730.1:2002

Reprinting / copying

This installation manual in its entirety is copyrighted. Another use outside the copyright requires the approval of STIEBEL-ELTRON Inc. This especially applies for copies, translations, micro ﬁlms and the storage into electronic systems. Editor: STIEBEL-ELTRON Inc.

Important notice:

Your own calculations and plans under consideration of the current norms and DIN-directions should primarily be basis for your projects. We don´t offer a guarantee for the completeness of the drawings and texts of this manual - they only represent some examples. They can only be used at your own risk. No liability is assumed for incorrect, incomplete or false information and the resulting damages.

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SOM 7 SI

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• SystemMonitoringDisplay

• Upto4TemperatureSensors,

Pt1000

• 9SelectableSystemSchemes

• EnergyProductionMeasurement

• VBus

• FunctionControl

• ThermostatFunctionwithTime

• ServiceCenterSoftware

• User-FriendlyOperation

• Compact,EasytoInstallHousing

Control

Connectivity

Scope of delivery:

1 x SOM 7 SI

1 x accessory bag

1 x spare fuse T4A 2 x screws and dowels 4 x strain relief and screws

Additionally enclosed in the full kit:

4 x sensor FKP6

Technical data

Housing:

plastic, PC-ABS and PMMA

Protection type: IP 20 / DIN 40050

Ambient temp.: 32 ... 104 °F Size: 172 x 110 x 46 mm

Mounting: wall mounting, mounting

into patch-panels is possible

Display: System screen for system visualisation, 16-segment display, 7-segment display, 8 symbols for system status and operating control lamp

Operation: by 3 pushbuttons in the front of the housing

Functions: Differential temperature controller with optional add-on system functions. Func ti on con trol according to BAW-standards, operating hours counter for solar pump, tube collector special function, thermostat function and heat quantity balancing.

Inputs: for 4 temperature sensors

Pt1000

Bus:VBus

Power supply: 120 VAC

Total power supply: 4 (2) A 120VAC

Outputs: 2 electromechanical relays

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SOM 7 SI

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S1 S2 S3

3456

Temp. Sensor Pt1000

LNR1NR2N

201918171615

141312

DE - 45527 Hattingen DeltaSol BS Plus

2 (1) A 1152V~

(1) A 115V~

R1 R2

T4A

115V~

CU 72060171 01 UL 60730-1A:2002 CSA E60730.1:2002

VBus

910

1. Installation

1.1 Mounting

cover

cable conduits with strain relief

fastening

display

can fuse 4A

pushbutton

Warning! Switch-off power supply before opening the housing.

The unit is designed for indoor installation only. It is not suitable for installation in hazardous locations and should not be sited near to any electromagnetic ﬁeld. The controller must installed in accordance with all electrical regulations. These regulations vary from region to region. Please contact the appropriate agency in your area if unclear on this.

Wall Mounting Instructions

1. Unscrew the cross-recessed screw of the cover and remove it from the housing.

2. Mark the upper fastening point on the wall and mount the enclosed dowel and screw.

3. Hang up the housing at the upper fastening point and mark the lower fastening point on the wall. The distance between the 2 mounting holes is 130 mm.

4. Fasten the housing at its lower point..

1.2 Electrical connection

ﬁxing

fuse

VBus

ground clamp

consumer clampsSensor clamp

net clamps

Dangerous voltage on contact!

Electrostatic discharge can lead to damages of electronic components!

The power supply to the controller must only be made by an external power supply switch and the line voltage must be 120 VAC (50/60 Hz). Flexible lines are to be ﬁxed at the housing by enclosed strain relief supports and screws.

The controller is equipped with 2 standard relays, to which the consumers (pumps, valves etc.) can be connected:

• Relay 1

18 = conductor R1 17 = neutral conductor N 13 = ground clamp

• Relay 2

16 = conductor R2 15 = neutral conductor N 14 = ground clamp

The temperature sensors (S1 up to S4) will be connected to the following terminals independently of the polarity:

1 / 2 = Sensor 1 (e.g. Sensor collector 1) 3 / 4 = Sensor 2 (e.g. Sensor tank 1) 5 / 6 = Sensor 3 (e.g. Sensor collector 2) 7 / 8 = Sensor 4 (e.g. Sensor tank 2)

The power supply is effected to the clamps: 19 = Neutral Conductor N 20 = Line Conductor L 12 = Ground Clamp

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SOM 7 SI

LNR1NR2N

201918171615

7 8

141312

2 (1) A 1152V~

(1) A 115 V~

R1 R2

T4A

115 V~

CU 72060171 01 UL 60730-1A:2002 CSA E60730.1:2002

VBus

910

1.2.1 Datacommunication/Bus

VBus

connection clamps

The controller comes with a VBus® for data communication and energy supply of external modules. The connection is effected with optional polarity at the clamps marked with„VBus®. Via this data bus you can install one or more VBus® modules.

• Energy Production Measurement Module WMZ-M1

• Large Display GA3

• Data Logger, DL1

• Data Teleindication, DFA2

The controller can also be connected to a PC with the help of a RS-COM adapter. With the Service Center Software (RCS) the controller parameters can be changed, measurements can be read out, processed and visualised. The software enables an easy function control and adjustment of the system.

1.2.2 Allocation of Clamps for System 1 Standard Solar System with 1 tank, 1 pump and 2

Arr 1

S4 / TRF

sensors. Sensor S4 / TRF can optionally be used for Energy Production Measurement.

Symbol Speciﬁcation

S1 Collector Sensor S2 Lower Tank Sensor

S3 Upper Tank Sensor

(optional)

S4 / TRF Sensor for Energy

Production Measurement

(optional)

R1 Solar Pump

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1.2.3 Allocation of Clamps for System 2

Arr 2

Tank 1

SolarSystemwith HeatExchangewith an existing tank. With 1 tank, 4 sensors and 2 pumps.

Tank 2

Symbol Speciﬁcation

S1 Collector Sensor

S2 Lower Tank Sensor S3 Upper Tank Sensor

S4 Tank 2 Sensor R1 Solar Pump R2 Pump for Heat Exchange

1.2.4 Allocation of Clamps for System 3 SolarSystemwithAfter-Heatingwith 1 tank, 3 sensors and after-heating thermostatic control options. Sensor S4/TRF can optionally be used for Energy Production Measurement.

Arr 3

S4 / TRF

Symbol Speciﬁcation

S1 Collector Sensor S2 Lower Tank Sensor S3 Upper Tank Sensor

S4 / TRF Sensor for Energy

Production Measurement

(Optional)

R1 Solar Pump

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SOM 7 SI

1.2.5 Allocation of clamps for system 4

Arr 4

S4 / TRF

Solar System with Layered Tank Charge with 1 tank, 3 sensors, 1 solar pump and a 3-way-valve for layered tank charge. Sensor S4 / TRF can optionally be used for heat quantity balancing.

Symbol Speciﬁcation

S1 Collector Sensor S2 Lower Tank Sensor S3 Upper Tank Sensor

S4 / TRF Sensor for Energy

Production Measurement

(Optional)

R1 Solar Pump

1.2.6 Allocation of clamps for system 5

Arr 5

Tank 1 Tank 2

S2 S3

S4 / TRF

2Tank SolarSystemwithValveLogic: with 2 tanks, 3 sensors, 1 solar pump and 1 3-way-valve. Sensor S4/ TR F can optionally b e used fo r Ener gy Produc tion Measurement

Symbol Speciﬁcation

S1 Collector sensor S2 Tank 1 Sensor S3 Tank 2 Sensor

S4 / TRF Sensor for Energy

Production Measurement

(optional) R1 Solar Pump R2 3-Way Valve

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1.2.6 Allocation of Clamps for System 6

Arr 6

Tank 1 Tank 2

2 Tank Solar System with Pump Logic with 2 tanks, 3 sensors and 2 solar pumps.

Symbol Speciﬁcation

S1 Collector Sensor S2 Tank Sensor 1 S3 Tank Sensor 2 S4 Measuring Sensor

(optinal) R1 Solar Pump 1 R2 Solar Pump 2

1.2.7Allocation of Clamps for System 7 Solar System with East-West Collectors, 1 tank, 3 sensors and 2 solar pumps. This system is appropriate for any system with multiple collector banks with differing output power.

Arr 7

Symbol Speciﬁcation

S1 Collector Sensor S2 Tank Sensor 1 S3 Collector Sensor 2 S4 Measuring Sensor

(optinal) R1 Collector 1 Solar Pump R2 Collector 2 Solar Pump

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SOM 7 SI

1.2.8 Allocation of Clamps for System 8

Arr 8

SolarSystemwithAfter-HeatingbySolidFuelBoiler

with 1 tank, 4 sensors, 1 solar pump and 1 pump for afterheating.

Symbol Speciﬁcation

S1 Collector Sensor S2 Lower Tank Sensor S3 Upper Tank Sensor

S4 Tank for Solid Fuel Boiler R1 Solar Pump R2 Pump for Solid

Fuel Boiler

1.2.9 Allocationofclampsforsystem9

Arr 9

SolarSystem andHeatingCircuitReverseRaising with 1 tank, 4 sensors, 1 solar pump and 1 3-way-valve for heating circuit reverse raising.

Symbol Speciﬁcation

S1 Collector Sensor S2 Lower Tank Sensor S3 Upper Tank Sensor

S4 Heating Circuit Return R1 Solar Pump R2 3-Way-Valve

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SOM 7 SI

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2. Opeartion and function

2.1 Pushbuttons for adjustment

backward

(selection / adjustment mode)

SET

2.2 System monitoring display

forward

The controller is operated by the 3 keys below the display.

To enter the conﬁguration mode toggle through the display parameters by pressing and releasing key 1 until this no longer causes the display to change. At this point press and hold key 1 until the conﬁguration parameters are displayed (about 5 seconds), then quickly release the key to avoid toggling to the end of the parameter list. The ﬁrst parameter in the list is DT O. To change the setting of a given parameter, follow the steps below.

1. Toggle to the parameter using keys 1 and/or 2. The abbreviation for the parameter is displayed on the right side of the screen, with the setting directly below, and the set icon solid (not blinking) on the extreme right.

2. Press key 3. The set icon begins blinking signifying that the parameter may now be adjusted.

3. Quickly use keys 1 and/or 2 to change the setting to that which is required.

4. Press key 3 again. The set icon stops blinking signifying that the new value has been stored.

The system display consists of an indication channel, a tool bar, and the system screen. These are detailed below.

Monitoring-Display

2.2.1 Indication Channel

Indication channel

2.2.2 Tool bar

Toolbar only illustrated above

The indication channel consists of two lines. The upper line is an alphanumeric 16-segment display, in which an abbreviation of the current setting or reading is shown. In the lower 7-segment display, the value of said reading or setting is shown.

The additional symbols of the tool bar indicate the current system status.

Symbol standard blinking

relay 1 active

relay 2 active

maximum tank limitation active / maximum tank temperature exceeded

antifreeze- function activated

collector cooling function or reccoling function active

collector minimum limitation or antifreeze function active

collector security shutdown or tank securtiy shutdown active

sensor defect

manual operation active

an adjustment channel is changed SET-mode

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SOM 7 SI

2.2.3 System screen

System Screen only

The system screen (active system scheme) shows the schemes selected on the controller. It consists of several system component symbols, which are - depending on the current status of the system - either ﬂashing, permanently shown or hidden.

Collector 1

Valve

Pumps

Sensors

Tank heat-exchanger

Collectors

with collector sensor

Tanks 1 and 2 with heat-exchanger

Collector 2

Tank

upper sensor tank

Heating circuit

Valve

Sensor Additional symbol for

operation of the burner

Tank 2 or afterheating (with an additional symbol)

Temperature sensor

Heatingcircuit

Pump

3-way-valve

The ﬂow direction or the current breaking capacity is always shown.

Afterheating with burner symbol

2.3 Blinkingcodes

2.3.1 System screen blinking codes

• Pumps are blinking during starting phase

• Sensors are blinking when their value is being displayed in

the indication channel.

• Sensors are quickly blinking in case of sensor defect. Burner symbol is blinking if after-heating is activated•

2.3.2LEDblinkingcodes

Constantly green: Normal operation Red/green blinking: Power-up phase Manual operation Red blinking: Sensor defect

(sensor symbol is quickly blinking)

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3. Primary commissioning

 Forprimarycommissioningthesystemschemehastobeselectedrst

1. After AC power is supplied to the unit it goes through its power up tests during which the control lamp is blinking

operating control lamp

backward

(selection / adjustment mode)

SET

forward

red and green. After this the unit is ready for conﬁguration. The unit‘s default system scheme is Arr. 1.

2. Clock time adjustment in channel TIME. By pressing the button once you can adjust hours, pressing it

once again the minutes.The time can be adjusted by buttons 1 and 2 and saved by pressing the button.

3. - select adjustment channel Arr

- change into -mode (see 2.1)

- adjustment are saved by pressing button

Now the controller is ready for operation and should enable an optimum operation of the solar system with the factory settings.

Arr 1 Arr 2

Arr 3 Arr 4

Arr 5 Arr 6

Arr 7 Arr 8

Arr 9

System survey:

Arr 1 : Standard Solar System

Arr 2 : Solar System with Heat Exchange

Arr 3 : Solar System with After-Heating

Arr 4 : Solar System with Tank Charge in Layers

Arr 5 : 2-Tank Solar System with Valve Logic

Arr 6 : 2-Tank Solar System with Pump Logic

Arr 7 : Solar System with 2 Collectors and 1 Tank

Arr 8 : Solar System with After-Heating by Solid Hot Fuel Boiler

Arr 9 : Solar System with Heating Circuit Reverse Raising

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SOM 7 SI

4. Control parameter and indication channels

4.1 Channel-overview



Legend:

Corresponding channel is available.

Corresponding channel is available if the appropriate option is activated.

Please note: S3 and S4 are only indicated in case of sensors connected

Corresponding channel is only available if the option Energy Production Measurement is activated (OHQM).



Corresponding channel is only available if the option Energy Production Measurement is deactivated (OHQM).

MEDT

The channel antifreeze content (MED%) is only shown if the antifreeze is not water or Tyfocor LS / G-LS (MEDT0or 3).Adjustments concerning the antifreeze content will only make sense if the antifreeze is used in the solar circuit.

Channnel

COL x x x x x x x x Temperature collector 1 15 COL 1 x Temperature collector 1 15 TST x x Temperature tank 1 15 TSTU x x x x Temperature tank 1 below 15 TST1 x x x Temperature tank 1 below 15 TSTO x x x x x Temperature tank 1 at the top 15 TST2 x x x Temperature tank 2 below 15 TFSB x Temperature solid hot fuel boiler 15 TRET x Temperature heating circuit 15 COL2 x Temperature collector 2 15 S3 x Temperature sensor 3 15 TRF S4 hP x x x x Operating hours relay 1 16 h P1 x x x x x Operating hours relay 1 16 h P2 x x x x x Operating hours relay 2 16 kWh MWh time x Time 15 Arr 1-9 System 12 DT O x x x x x x Switch-on temperature diff 17 DT1O x x x Switch-on temperature diff 1 17 DT F x x x x x x Switch-off temperature diff 1 17 DT1F x x x Switch-off temperature difference 17

S MX x x x x x x Maximum temperature tank 1 17 S1 MX x x x Maximum temperature tank 1 17 DT2O x x x Switch-on temperature difference 2 17 DT2F x x x Switch-off temperature difference 2 17 S2MX x x x Maximum temperature tank 2 17 EM x x x x x x x x emergency temperature collector 1 18 EM1 x emergency temperature collector 1 18

1 2 3 4 5 6 7 8 9

     

       

Arr

Speciﬁcation Page

Temperature return sensor 15

x x Temperature sensor 4 15

Heat quantity kWh 16 Heat quantity MWh 16

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SOM 7 SI

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Channel

OCX x x x x x x x x option collector cooling collector 1 18 OCX1 x option collector cooling collector 1 18 CMX x* x* x* x* x* x* x* x* maximum temperature collector 1 18 CMX1 x* maximum temperature collector 1 18 OKN x x x x x x x x option minimum limitation collector 1 18 OKN1 x option minimum limitation collector 1 18 CMN x* x* x* x* x* x* x* x* minimun temperature collector 1 18 CMN1 x* minimun temperature collector 1 18 OCF x x x x x x x x option antifreeze collector 1 18 OCF1 x option antifreeze collector 1 18 CFR x* x* x* x* x* x* x* x* antifreeze temperature collector 1 18 CFR1 x* antifreeze temperature collector 1 18 EM2 x emergency temperature collector 2 18 OCX2 x option collector cooling collector 2 18 KMX2 x* maximum temperature collector 2 18 OCN2 x option miminum limitation collector 2 18 CMN2 x* minium temperature collector 2 18 OCF2 x option antifreeze collector 2 18 CFR2 x* antifreeze temperature collector 2 18 PRIO x x x priority 19 tST x x x stop time 19 tRUN x x x Ciruclation time 19 OREC x x x x x x x x x option reccoling 19 O TC x x x x x x x x x option tube collector 19 DT3O x x switch-on temperature difference 3 17 DT3F x x switch-off temperature difference 3 17 MX3O x x switch-on treshold for maximum temp. 17 MX3F x x switch-off treshold for maximum temp. 17 MN3O x x switch-on treshold for minimum temp. 17 MN3F x x switch-off treshold for minimum temp. 17 AH O x switch-on temp. for thermostat 1 20 AH F x switch-off temp. for thermostat 1 20

OHQM x x x x option WMZ 16 FMAX MEDT MED% MEDT MEDT MEDT MEDT antifreeze content 16

t1 on x Switch on time 1 thermostat 20 t1 off x Switch off time 1 thermostat 20 t2 on x Switch on time 2 thermostat 20 t2 off x Switch off time 2 thermostat 20 t3 on x Switch on time 3 thermostat 20 t3 off x Switch off time 3 thermostat 20 HND1 x x x x x x x x x manual operation relay 1 20 HND2 x x x x x x x x x manual operation relay 2 20 LANG x x x x x x x x x Language 20 UNIT x x x x x x x x x Change over °FAH / °CEL 20 PROG XX.XX program number

VERS X.XX version number

1 2 3 4 5 6 7 8 9

       

Arr

Speciﬁcation Page

maximum ﬂow 16 antifreeze type 16

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SOM 7 SI

4.1.1 Collector Temperatures

COL, COL1, COL2:

Collector Temperature display range: -40 → +480°F

4.1.2 Tank Temperatures

TST, TSTL, TSTU, TST1, TST2:

Tank Temperatures Display range: -40 →+480 °F

4.1.3 Sensor 3 and Sensor 4 Temperatures

S3, S4: S3, S4:

Sensor Temperatures Display range: -40 →+480 °F

Shows the current collector temperature.

• COL : collector temperature (1-collector-system)

• COL1 : collector 1 temperature

• COL2 : collector 2 temperature

Shows the current tank temperature.

• TST : tank temperature (1-tank-system)

• TSTL : tank temperature, lower

• TSTU : tank temperature, upper

• TST1 : tank 1 temperature

• TST2 : tank 2 temperature

Shows the current temperature of the corresponding additional sensor (without control function).

• S3 : sensor 3 temperature

• S4 : sensor 4 temperature

Please note: S3 and S4 are only shown if the temperature sensors are connected.

4.1.4 Other Temperatures

TFSB,TRET,TRF:

O t h e r M e a s u r e d Temperatures Display range: -40 →+480 °F

4.1.5 Time

Shows the current temperature of the corresponding sensor.

• TFSB : solid fuel boiler temperature

• TRET : heating reverse raising temperature

• TRF : return ﬂow temperature

This channel stores and displays the current time in 24 hour format. To change the stored time, press the key 3 for 2 seconds. This causes the icon to blink and the hour may be adjusted using keys 1 and 2. To adjust the minutes press key 3 again. The icon continues to blink, but keys 1 and 2 now cause the minutes to change. Pressing key 3 again causes the displayed value to be stored.

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4.1.6 Operating hours counter

h P / h P1 / h P2:

Operating Hours Counter Indication channel

4.1.7 Energy Production Measurement

OHQM: Energy Production Measurement. Adjustment range: OFF/ON Factory setting: OFF FMAX: Volumetric ﬂow rate in l/min Adjustment range 0 - 20 in steps of 0.1 Factory setting 6.0

The operating hours counter adds up the solar operating hours of the respective relay (h P / h P1 / hP2). The total amount of hours which the relay has been active is shown on the display.

The operating hours total can be reset. As soon as the operating hours channel is selected, the symbol is displayed

solid. To reset the operating hours press and hold the middle key (key 3) for approximately 5 seconds. The set symbol blinks. Press key 3 again and the operating hours counter is reset to 0.

In order to interrupt the RESET-procedure, don’t press any button for about 5 seconds. The controller returns automatically into the display mode.

A measurement of the system’s energy production is possible in conjunction with a ﬂowmeter and an additional sensor which measures the heat exchanger’s return temperature. Activate this option by changing the value of OHQMto “on”.

Adjust this setting to the maximum ﬂow rate of the system in liters per minute. This is necessary in order to calculate the system‘s actual energy output. Some controllers have an additional parameter, FMXG, which is the ﬂow rate in gallons per minute.

MEDT: Type of antifreeze Adjustment range 0 - 3 Factory setting 1

MED%: Concentration of antifreeze in (Vol-) % MED% is blinded out by MEDT 0 and 3. Adjustment range 20 - 70 Factory setting 45

kWh/MWh:Energy production in kWh / MWh Display channel

Type of antifreeze:

0 : water 1 : propylene glycol 2 : ethylene glycol 3 : Tyfocor® LS / G-LS

The energy produced by the system is measured by the calculation of the volume of heat exchanger ﬂuid moved through the system and a comparison of the temperature of the ﬂuid leaving the collector (S1) with that of the ﬂuid exiting the storage tank‘s heat exchanger (S4). It is shown in kWh in one channel and MWh in another.

The total energy produced can be reset. As soon as one of the display channels of the heat quantity is selected, the sym-

bol is displayed solid. To reset the total energy produced press and hold the middle key (key 3) for approximately 5 seconds. The set symbol blinks. Press key 3 again and the total energy produced is reset to 0..

In order to interrupt the RESET-procedure, no button should be pressed for about 5 seconds. The controller returns automatically into indication mode.

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SOM 7 SI

4.1.8∆T-regulation

DTO/ DT1O/ DT2O/ DT3O:

Switch-on temperature differential Adjustment range

2.0 - 40.0 °F Factory setting 12.0

DTF/ DT1F/ DT2F/DT3F: Switch-off temperature differential Adjustment range

1.0 - 38.0 °F Factory setting 8.0 °F

Please note: Switch-on temperature difference DT O must be at least 2 °F higher than the switch-off tempe raturedifference DT F.

4.1.9MaximumTankTemperature

Primarily the controller works in the same way as a standard differential controller. If the switch-on difference (DTO/ DT1O/DT2O/DT3O) is sensed, the pump is activated. If the adjusted switch-off temperature is measured (DTF/

DT1F/DT2F/DT3F), the controller switches-off.

SMX/ S1MX/S2MX:

Maximum storage tank temp. Adjustment range: 40 - 205 °F Factory setting 140 °F

4.1.10 ∆T-controller (solid fuel boiler and heat exchange)

MaximumTemperatureLimitation MX3O/MX3F:

Maximum temperature limitation Adjustment range

MX3O 137 - 205°F MX3F30 - 136°F Factorysettings

MX3O 140°F MX3F 136°F

Minimum Temperature Limitation

MN3O/MN3F: Minimum Temperature Limitation

Adjustment range Arr 2 MN3O 30 - 49°F

MN3F 41 - 195°F

Arr 8 MN3O 30 - 149°F

MN3F 141 - 195°F Factorysettings

Arr 2 MN3O 40°F | MN3F 50°F Arr 8 MN3O 140°F |MN3F 150°F

If the adjusted maximum temperature is exceeded, a further loading of the store is stopped so that a damaging overheating can be avoided. If the maximum store temperature is exceeded, the symbol is displayed.

Please note: The controller is equipped with a securityswitch-off of the storage tank, which will not allow further loading of the tank if it reaches 205 °F.

The Maximum Temperature Limitation regulates the temperatures at which the second differential switch-on temperature (DT3O) will operate. This feature is only available if Arr 2 or Arr 8 is selected (for solid fuel boilers or heat exchange regulation).

If the relavent sensor measures a temperature greater than MX3O, relay 2 is disabled. Relay 2 will not be enabled again until a temperature less than MX3F is reached. Reference sensor: S3 by Arr 8 (TSTU) S4 by Arr 2 (TST2)

The Minimum Temperature Limitation also works in co njunction with the second di ffe rential swi tch-on temperature (DT3O). If the relavent sensor measures a temperature less than MN3O, relay 2 will be disabled. Relay 2 will not be enabled again until a temperature greater than MN3F is measured. by the relavent sensor. Reference sensor: S4 by Arr 8 (TFSB) S3 by Arr 2 (TSTU)

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SOM 7 SI

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4.1.11 Collector Emergency Shutdown Temperature

EM / EM1 / EM2:

Collector Emergency Shutdown Temperature Adjustment range 230 - 400 °F, Factory setting 285 °F

4.1.12 SystemCoolingFunctions.

OCX/ OCX1/OCX2:

System Cooling Adjustment range OFF/ON Factory setting OFF

If the collector emergency shutdown temperature (EM/ EM1/EM2) is reached, the solar pump (R1/R2) is deactivated in order to avoid damaging the solar components. The default setting is 285°F. If the system is in emergency shutdown mode the symbol is ﬂashing. The system will not exit this mode until the temperature measured is 30°F lower than the value of this setting.

The system cooling function is used to prevent the system‘s heat exchanger ﬂuid from overheating. This in turn prevents the degradation of the ﬂuid‘s corrosion inhibitors avoiding damage to the system components. If the system cooling function is activated the symbol is ﬂashing.

CMX/ CMX1/CMX2: Maximum Collector Temperature Adjustment range: 210 - 380 °F Factory setting 250 °F

4.1.13 Minimum Collector Temperature Limit

OCN / OCN1 / OCN2:

Collector Minimum Temperature Limitation Adjustment range OFF/ON

CMN / CMN1 / CMN2:

Collector Minimum Temperature Adjustment range 50 - 195°F Factory setting 50°F

If the maximum collector temperature (CMX/CMX1/ CMX2) is reached the maximum storage tank temperature (SMX/S1MX/S2MX) is overridden and the system‘s circulator pump is turned on, cooling the system‘s HX ﬂuid using the water in the storage tank. This will continue until either the collector temperature is measured to be at least 9°F lower than the setting of “CMX/CMX1/CMX2”, the tank reaches it’s 205°F security-switch-off temperature, or the collector reaches its collector emergency shutdown temperature. The last two instances should not occur if the system is sized and conﬁgured properly.

The minimum collector temperature is a temperature which must be exceeded in order for the solar pump (R1/R2) to be switched-on. The minimum temperature setting is used to avoid starting-up the solar pump (or solid fuel boiler charging pumps) when the temperature of the heat exchanger ﬂuid is too low. If the minimum temperature feature is activated

the symbol is shown on the display (blinking).

4.1.14 AntifreezeFunction

OCF/ OCF1/OCF2:

Antifreeze Function Adjustment range OFF/ON Factory setting OFF

CFR/CFR1/ CFR2: Antifreeze Temperature Adjustment range 15 - 50°F Factory setting 40°F

The antifreeze function activates the loading circuit between collector and tank if the antifreeze temperature is reached in order to protect the heat exchanger ﬂuid against freezing or “thickening“. If the antifreeze temperature is exceeded by 2°F, the loading circuit will be deactivated.

Please note: As there is only a limited heat quantity of the tank available for this function, the antifreeze function should only be used in regions with few days of temperatures around freezing point.

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SOM 7 SI

4.1.15 Oscillating Charge

RespectiveAdjustmentValues:

Factorysetting Adjustmentrange

Priority [PRIO] (1 / Arr 5,6) (2 / Arr 4) 0-2

OscillatingBreakTime[tST] 2 min. 1-30 min.

Oscillating Charge Time [tRUN] 15 min. 1-30 min.

SOM 7 SI Priority Logic

Tank Priority:

OscillatingBreakTime/OscillatingChargeTime/

Collector Rising Temperature

The above oscillating charge parameters are only available in multi-tank or layered charge systems (Arr 4, 5 and

6). If Tank Priority is set to 0, the tanks which show a temperature difference towards the collector are loaded in numerical order (tank 1 or tank 2). Usually only one tank is loaded at this point. For Arr= 5, 6 parallel loading is also possible.

The controller checks the tanks regarding loading facilities (switch-on difference). If the priority tank cannot be loaded, the lower-ranking tank is checked. If the lower-ranking tank can be charged this is effected by the so-called “oscilating charge time” (tRUN).When the oscillating charge time is over the loading is stopped. The controller regulates the increase of the collector temperature. If it increases by the collector rising temperature (∆T-Col 4°F, ﬁxed software value), the expired break time is again reset to zero and the oscillating break time starts again. If the switch-on conditions of the priority tank are not reached, the loading of the lower-ranking tank is continued. If the priority switch has reached its maximum temperature, the oscillating charge is not effected.

This setting is designed to be used in conjunction with the

4.1.16 Recooling function

OREC:

Recooling Option adjustment range OFF / ON Factory setting: OFF

4.1.17 Tube collector special function

O TC:

Tube Collector Function Adjustment range: OFF / ON Factory setting: OFF

System Cooling Function, which overrides the maximum store temperature (SMX,S1MX,S2MX) when used. This function will cool the tank back down to its maximum temperature when the collector temperature becomes low enough to facilitate such. This prevents a cumulative overheating condition if the cooling function needs to be used multiple days in a row. In order to utilize this function with tube collectors, a heat rejection loop (heat dump) is necessary.

If the controller measures an increase of 4 °F compared to the collector temperature which was last stored, the solar pump is switched-on for about 30 seconds. After the solar pump is deactivated the current collector temperature is stored as new reference value. If the measured temperature (new reference value) is again exceeded by 4 °F, the solar pump again switches-on for 30 seconds. If the switch-on differential is reached during any of these processes the controller automatically switches over to solar charging.

If the collector temperature drops by 4 °F while the system ﬂuid is stagnant, the switch-on value for the special tube collector function will be recalculated.

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SOM 7 SI

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4.1.18ThermostatFunction(Arr = 3)

Afterheating

AHO:

Thermostat Switch-on Tem perature Adjustment range 30 - 205°F Factory setting 105°F

AHF:

Thermostat Switch-off Tem pe rature Adjustment range 30 - 205°F Factory setting 115°F

use of surplus energy

The thermostat function is independent from the solar loop’s differential switching temperatures and can be used either to control a backup heating source such as a boiler, or to send some of the tank’s excess thermal energy to a heating loop or heat dump. Whis one it does is dependent upon the settings AHOandAHF.

• If AHO< AHF The thermostat function is used to add heat to the tank using a back up heating source.

• If AHO > AHF The thermostat function is used to remove the tank’s excess thermal energy.

Symbol will be shown on the display if the second relay output is activated.

t1 E, t2 E, t3 E:

Thermostat switch-on time Adjustment range: 00:00 - 23:45 Factory setting: 00:00

4.1.19 OperatingMode

HND1/HND2:

Operating Mode Adjustment range: OFF, AUTO, ON Factory setting: AUTO

4.1.20 Language

LANGUAGE

Language Setting Adjustment range: dE, En, It, Fr Factory setting: En

t1 A, t2 A, t3 A:

Thermostat switch-off time Adjustment range: 00:00 - 23:45 Factory setting: 00:00

In order to block the thermostat function for a certain time span, there are 3 time frames t1, t2 and t3. If, for example, the function should be activated only between 6:00 and 9:00, t1 E should be set to 6:00 and t1 A should be set for 9:00. If all of the thermostat time functions are set to 00:00, the themostat function will be in continuous operation. (factory setting).

For control and service work the operating mode of the controller can be manually adjusted by selecting the adjustment value HAND, in which the following settings are available.

• HND1/HND2 Operating mode

OFF : relay off (blinking) +

AUTO : relay in automatic operation

ON : relay on (blinking) +

The menu language can be adjusted in this channel.

• dE : German

• En : English

• It : Italian

• Fr : French

4.1.21 UnitsforTemperatureDisplay

UNIT:

Temperature Display Units Adjustment range: FAH, CEL Factory setting: FAH

The menu unit can be adjusted:

• °FAH

• °CEL

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SOM 7 SI

4.2 Recommended Settings for any System Scheme

Below is a list of important settings which must be changed from their default value no matter what system scheme (Arr. 1 - Arr. 9) is being used. Any time the system scheme is changed these values need to be reset to the below values. If this is not done there is a very good chance that the system will overheat and thus be in need of time consuming and possibly costly repairs.

Display

Code

OCX

CMX

OREC

Below is a list of the recommended switch-on and switch-off settings for the controller. These options are available on all 9 system schemes. These settings also need to be reset to the below values whenever the system scheme (Arr. 1 - Arr. 9) is changed. Advanced users may want to set these differently depending on the circumstances.

Parameter Name

and Reference

Collector Emergency

Shutdown Temperature

(p. 18)

System Cooling Function (p. 18)

Maximum Collector

Temperature (p. 18)

Recooling Function

(p. 19)

RecommendedSettingandExplanation

(All temperatures in °F)

310° This prevents the HX fluid directly behind that in the

sensor well from causing the system to go into emergency shutdown mode as soon as the cooling function is activated.

On Failure to change this option to ‘on’ will likely result in overheating of the system at some point.

230° Having a relatively large ΔT between CMX and EM prevents the HX fluid directly behind that in the sensor well from causing the system to go into emergency shutdown mode as soon as the cooling function is activated.

On This prevents a cumulative overheating of the system by ensuring a relatively high Δt between the tank temperature and and the security switch-off of the tank (205°).

Display

Code

DT O

DT F

Parameter Name

and Reference

Switch on Temperature

Difference (p. 17)

Switch off Temperature

Difference (p. 17)

RecommendedSettingandExplanation

(All temperatures in °F)

15° Setting this too low can cause the circulator to cycle on and

off too frequently.

5° Too high of a ΔT between DT O and DT F can cause the circulator to switch on and off too frequently.

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SOM 7 SI

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4.2.1RecommendedSettingsforStandardDHWSystem(Arr.1)

Display

Code

DT O

DT F

S MX

OCX

CMX

OCN

Parameter Name

and Reference

Switch on Temperature

Difference (p. 17)

Switch off Temperature

Difference (p. 17)

Maximum Store

Temperature (p. 17)

Collector Emergency

Shutdown Temperature

(p. 18)

System Cooling Function (p. 18)

Maximum Collector Temperature (p. 18)

Minimum Collector

Temperature (p. 18)

RecommendedSettingandExplanation

(All temperatures in °F)

15° Setting this too low can cause the circulator to cycle on and

off too frequently.

5° Too high of a ΔT between DT O and DT F can cause the circulator to switch on and off too frequently.

140° This will prevent the temperature at the top of the tank from getting hot enough to cause the T & P valve to release. This will also allow the cooling function to operate effectively.

310° This prevents the HX fluid directly behind that in the sensor well from causing the system to go into emergency shutdown mode as soon as the cooling function is activated.

On Failure to change this option to ‘on’ will likely result in overheating of the system at some point.

Off The ΔT between DT O and DT F achieves the requisite effect for most situations.

OCF

OREC

O TC

OHQM

HND1

LANG

UNIT

Please note that advanced users may desire to adjust certain parameters differently depending

on the circumstances. These suggested settings are merely a manner in which to congure the

unit that will avoid damage to the system from overheating. Installing the SOM 7 with the default settings will likely result in an overheating condition of the solar system.

Antifreeze Option

(p. 18)

Recooling Function

(p. 19)

Tube Collector

Function (p. 19)

Energy Production

Measurement (p. 16)

Circulator Pump

Operating Mode (p. 20)

Language (p. 20)

Units for Temperature

Display (p. 20)

Off Unless the system is located in a region which rarely experiences temperatures near freezing, and a very low glycol to water percentage is being used.

On This prevents a cumulative overheating of the system by ensuring a relatively high Δt between the tank temperature and and the security switch-off of the tank (205°).

Off Unless the system is utilizing tube collectors.

Off Unless the installer has installed a sensor in position S4 and

wishes to utilize this function.

Auto This is the normal operating mode. The other two modes are for testing, charging, etc.

En (English) For most applications in North America this is appropriate, with some exceptions.

FAHFor most applications in North America this is appropriate, but it is purely a matter of preference.

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SOM 7 SI

4.2.2RecommendedSettingsforStandardDHWSystemwithBoilerBackup(Arr.3)

Display

Code

DT O

DT F

S MX

OCX

CMX

OCN

Parameter Name

and Reference

Switch on Temperature

Difference (p. 17)

Switch off Temperature

Difference (p. 17)

Maximum Store

Temperature (p. 17)

Collector Emergency

Shutdown Temperature

(p. 18)

System Cooling Function (p. 18)

Maximum Collector

Temperature (p. 18)

Minimum Collector Temperature (p. 18)

RecommendedSettingandExplanation

(All temperatures in °F)

15° Setting this too low can cause the circulator to cycle on and

off too frequently.

5° Too high of a ΔT between DT O and DT F can cause the circulator to switch on and off too frequently.

140° This will prevent the temperature at the top of the tank from getting hot enough to cause the T & P valve to release. This will also allow the cooling function to operate effectively.

310° This prevents the HX fluid directly behind that in the sensor well from causing the system to go into emergency shutdown mode as soon as the cooling function is activated.

On Failure to change this option to ‘on’ will likely result in overheating of the system at some point.

Off The ΔT between DT O and DT F achieves the requisite effect for most situations.

OCF

OREC

O TC

AH O

t1 0-t3 F

OHQM

HND1

Antifreeze Option

(p. 18)

Recooling Function

(p. 19)

Tube Collector

Function (p. 19)

Thermostat Switch-On

Temperature (p. 20)

Thermostat Switch-Off

Temperature (p. 20)

Thermostat Switching

Times (p. 20)

Energy Production

Measurement (p. 16)

Solar Pump Operating

Mode (p. 20)

Off Unless the system is located in a region which rarely experiences temperatures near freezing, and a very low glycol to water percentage is being used.

On This prevents a cumulative overheating of the system by ensuring a relatively high Δt between the tank temperature and and the security switch-off of the tank (205°).

Off Unless the system is utilizing tube collectors.

115 Or whatever temperature the user wants the boiler to

begin heating the tank water via the upper heat exchanger.

125 Or whatever temperature the user wants the boiler to stop heating the tank water via the upper heat exchanger.

00:00 Unless there are certain times in the day when the boiler loop should not switch on.

Off Unless the installer has installed a sensor in position S4 and wishes to utilize this function.

Auto This is the normal operating mode. The other two modes are for testing, charging, etc.

HND2

LANG

Boiler Loop Operating

Mode (p. 20)

Language (p. 20)

Auto This is the normal operating mode. The other two modes are for testing, charging, etc.

En (English) For most applications in North America this is appropriate, with some exceptions.

Page 24

SOM 7 SI

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Ta co

S R 501

(T ypic al Wiring)

N/O

B oiler C ontrol

B oard

Thermostat

Input

S OM 7

Display

Code

UNIT

Parameter Name

and Reference

Units for Temperature

Display (p. 20)

RecommendedSettingandExplanation

(All temperatures in °F)

FAHFor most applications in North America this is appropriate, but it is purely a matter of preference.

Please note that advanced users may desire to adjust certain parameters differently depending

on the circumstances. These suggested settings are merely a manner in which to congure the

unit that will avoid damage to the system from overheating. Installing the SOM 7 with the default settings will likely result in an overheating condition of the solar system.

4.2.2.1SOM7WiringDiagramforConnectiontoColdStartBoiler

In order to interface the SOM 7 with the boiler control board of a typical boiler (which does not heat up the boiler water unless a zone calls for heat) it is necessary to incorporate a relay circuit. Below is a wiring diagram in which a commonly used single zone controller in conjunction with a SOM 7 is controlling such a boiler.

Page 25

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SOM 7 SI

S1 S2 S3

3456

Temp. Sensor Pt1000

LNR1NR2N

201918171615

141312

DE - 45527 Hattingen DeltaSol BS Plus

2 (1) A 1152V~

(1) A 115V~

R1 R2

T4A

115V~

CU 72060171 01 UL 60730-1A:2002 CSA E60730.1:2002

VBus

910

5. Troublesooting Tips

If a malfunction occurs, it will be indicated on the display of the controller:

°F Ω °F Ω

14 961 131 1213 23 980 140 1232 32 1000 149 1252 41 1019 158 1271 50 1039 167 1290 59 1058 176 1309 68 1078 185 1328 77 1097 194 1347 86 1117 203 1366

95 1136 212 1385 104 1155 221 1404 113 1175 230 1423 122 1194 239 1442

Resistance values of the

Pt1000-sensors

Warning symbol

Operating control lamp

Symptom Possible Cause and Remedies List

Operating control lamp ﬂashes red. The symbol is displayed and the symbol is ﬂashing. The indication channel of the relevent sensor displays 888.8 instead of the temperature.

SOM unit is sensing an open circuit condition.

Measure the resistance between the two terminals to which 1. the relevent sensor is attached. If it measures inﬁnite resistance continue to step 2. If it measures a resistance within range of the above chart, call for service. Disconnect the sensor wire from the terminals and measure 2. the resistance between the two wires. If it still measures inﬁnite resistance continue to step 3. If it measures a resistance within range of the above chart, there is a problem with the connection from the sensor wire to the terminal. This problem lies either with the sensor or the wire/connec-3. tions. In order to determine whether the problem lies with the sensor itself, the sensor must be disconnected from any extension wire and its resistance must be measured. If, when the sensor is disconnected, the resistance is measured to be within the values of the resistance chart the problem is with the extension wire/connections.

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SOM 7 SI

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Symptom Possible Cause and Remedies List

Operating control lamp ﬂashes red. The symbol is displayed and the symbol is ﬂashing. The indication channel of the relevent sensor displays -88.8 instead of the temperature.

Operating control lamp is off and screen is blank. SOM unit’s control board is not receiving power.

Collector is much hotter than the storage tank, but the system’s circulator is not on.

SOM unit is sensing a short circuit condition.

Measure the resistance between the two terminals to which 1. the relevant sensor is attached. If it measures a resistance close to zero continue to step 2. If it measures a resistance within range of the above chart, call for service. Disconnect the sensor wire from the terminals and measure 2. the resistance between the two wires. If it still measures a resistance close to zero continue to step 3. If it measures a resistance within range of the above chart, there is a problem with the connection from the sensor wire to the terminal. This problem lies either with the sensor or the wire/connec-3. tions. In order to determine whether the problem lies with the sensor itself, the sensor and its 4’ wire which was factory installed must be disconnected from any extension wire and its resistance must be measured. If, when the sensor is disconnected, the resistance is measured to be within the values of the resistance chart the problem is with the extension wire/ connections.

HAZARDOUSVOLTAGEPRESENT!

Measure the voltage between terminals 19 and 20. If the volt-1. age is close to the nominal voltage of 120 VAC, continue to step 2. If the voltage is not correct, the problem lies with the power supply to the unit. Remove the unit’s can fuse and measure its resistance. If the 2. resistance is close to zero, call for service. If inﬁnite resistance is measured, replace the fuse.

Compare the tank’s present temperature with its maximum 1. setting (SMX). If the storage tank is within 4 degrees of this setting the circulator pump will not turn on even if the switch on temperature has been reached unless the System Cooling Function (OCX) is turned on and the Maximum Collector Temperature (CMX) has been reached.

Check to see if the 2. symbol is blinking. If this is the case the system is in Emergency Shutdown Mode. Either the collector sensor measured a temperature equal to or greater than the Collector Emergency Shutdown Temperature (step 3), or the store sensor measured a temperature of at least 205 °F (step

4). If the system has reached the Collector Emergency Shut-3. down Temperature, the controller’s conﬁguration needs to be checked. Is the cooling function (OCX) set to on? Is there a sufﬁciently large ΔT between the Maximum Collector Temperature (CMX) and the Collector Emergency Shutdown Temperature (EM)? To get the system to exit emergency shutdown mode the EM setting must be at least 30 °F greater than the measured collector temperature. If the storage tank has reached its emergency shutdown tem-4. perature (205 °F), the circulator will not turn on unless the store sensor measures a temperature of 201 °F or less. This parameter is not adjustable.

Page 27

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SOM 7 SI

Symptom Possible Cause and Remedies List

LED is blinking red and green. Check the Circulator Pump Operating Mode, HNDx. This 1.

Tank temperature cools excessively overnight. Make sure that the check valve between the upper port of 1.

Circulator pump is running, collector is much hotter than store, but the tank fails to heat up.

should be set to “auto”. If it is set to either “on” or “off” the unit will ﬂash red and green, the symbol will ﬂash and the

symbol will be displayed.

If the unit is in its power up mode this condition is normal.2.

the lower heat exchanger and the output of the solar array is installed and functioning properly. Check all conﬁguration settings (see section 4.2).2. Make sure that all system components are properly insulated.3.

Make sure that the controller is actually powering the circula-1. tor. Is the symbol displayed in the tool bar? If not, check all

conﬁguration settings (see section 4.2). Otherwise continue to step 2.

HAZARDOUSVOLTAGEPRESENT!

Check for 120 VAC between terminals 17 and 18. If the 2. symbol is displayed and there is not 120 VAC between these two terminals, call for service. Check the system’s ﬂow meter. Is the system getting the 3. proper voumetric ﬂow rate required by the collectors? If not, try adjusting the system’s ﬂow adjustment valve (if present). If the system is getting no ﬂow even though the circulator is 4. running there is either an obstruction in the collector loop, or there is air in the system. If the system recently experienced an overheating condition, the problem is most likely the latter and the system needs to be purged. There is also a possibility that the circulator pump itself is defective.

Page 28

SOM 7 SI

6. Warranty

WARRANTY

RESIDENTIAL & COMMERCIAL WARRANTY: STIEBEL ELTRON WARRANTS TO THE ORIGINAL OWNER THAT THE SOM 7 CONTROLLER WILL BE FREE FROM DEFECTS IN WORKMANSHIP AND MATERIALS FOR A PERIOD OF TWO (2) YEARS FROM THE DATE OF PURCHASE. SHOULD THE PART(S) PROVE TO BE DEFECTIVE UNDER NORMAL USE DURING THIS PERIOD, STIEBEL ELTRON, INC. WILL BE RESPONSIBLE FOR REPLACEMENT OF THE DETECTIVE PART(S) ONLY. STIEBEL ELTRON, INC. IS NOT RESPONSIBLE FOR LABOR CHARGES TO REMOVE AND/OR REPLACE THE DEFECTIVE PART(S), OR ANY INCIDENTIAL OR CONSEQUENTIAL EXPENSES.

SHOULD THE OWNER WISH TO RETURN THE SOM 7 CONTROLLER FOR REPAIR, THE OWNER MUST FIRST SECURE WRITTEN AUTHORIZATION FROM STIEBEL ELTRON, INC. THE OWNER SHALL BE REQUIRED TO SHOW PROOF OF PURCHASE DATE, AND TO PAY ALL TRANSPORTATION COSTS TO RETURN THE DEFECTIVE PART(S) OR SOM 7 CONTROLLER. WARRANTY IS VOID IF SOM 7 CONTROLLER HAS BEEN INSTALLED OR USED IMPROPERLY OR IF DESIGN HAS BEEN ALTERED IN ANY WAY.

Stiebel Eltron, Inc.

17 West Street USA - West Hatﬁeld, MA 01088

Phone: (413) 247-3380 Fax: (413) 247-3369

info@stiebel-eltron-usa.com

Distributed by:

Comments:

The design and the speciﬁcations can be changed without advance notice. The illustrations can differ from the production model.

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STIEBEL ELTRON SOM7SI User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual