STIEBEL ELTRON SOM 9s User manual

SOM 9s
Manual
SOM 9s
Installation
Operation
Functions and options
Troubleshooting
Thank you for buying this product.
Read this manual carefully to get the best performance from this unit.
Please keep this manual carefully.
en-US/CA
*49012850* 49012850
Simply the Best

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SOM 9s
Subject to technical change. Errors excepted.
Contents
1 Overview............................................................. 3
2 Installation .......................................................... 4
2.1 Mounting....................................................................4
2.2 Electrical connection...............................................4
2.3 Data communication / Bus ....................................6
2.4 SD card slot ..............................................................6
2.5 Overview of the systems.......................................7
2.6 System layouts..........................................................9
3 Operation and function................................... 69
3.1 Buttons.................................................................... 69
3.2 Selecting menu points and adjusting values ... 69
3.3 Menu structure...................................................... 69
3.4 Indications and system monitoring display...... 70
3.5 Further indications ............................................... 71
4 Status menu ..................................................... 72
5 Initial commissioning....................................... 73
6 Functions and options ..................................... 75
6.1 Status level.............................................................. 75
6.2 Adjustment channels............................................ 78
6.3 Overview of options and their parameters.... 94
7 User code and short menu -
Adjustment values............................................ 96
8 Messages ........................................................... 97
9 Troubleshooting ............................................... 98
9.1 Miscellaneous......................................................... 99
10 Accessories .................................................... 101
10.1 Sensors and measuring instruments............... 101
10.2 Interface adapters...............................................101
10.3 Visualization modules ........................................102
11 Index ................................................................ 103
Safety advice:
Please read the following information carefully before
installing and operating the controller. In this way damage
to the solar system caused by wrong installation will be
avoided. Please make sure that the mounting is adapted to
the characteristics of the building, that the local regulations
are respected and is conform with the technical rules.
Please pay attention to the following safety advice in order
to avoid danger and damage to people and property.
Description of symbols
Signal words describe the danger that may occur, when it
is not avoided.
WARNING means that injury, possibly life-threatening
injury, can occur.
ATTENTION means that damage to the appliance can
occur.
Information about the product
Proper usage
The solar controller is designed for use in solar thermal
and heating systems in compliance with the technical data
specied in these instructions.
Improper use excludes all liability claims.
Note
Strong electromagnetic elds can impair the
function of the controller.
ÎMake sure the controller as well as the
system are not exposed to strong electro-
magnetic elds.
WARNING! Warnings are indicated with a
warning triangle!
They contain information on how
to avoid the danger described.
Note
Notes are indicated with an information
symbol.
Instructions:
Attention should be paid to
• Valid national and local standards and regulations
• Respective valid standards and directives
Equipment to be installed and used in accordance with
the rules of the National Electrical Code (NEC) or with
Canadian Electrical Code (CEC), Part I.
These instructions are exclusively addressed to authorized
skilled personnel.
• Only qualied electricians should carry out installation and
maintenance work.
• Initial installation should be carried out by qualied personnel
ÎArrows indicate instruction steps that should be car-
ried out.
General

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SOM 9s
• Extralargegraphicdisplay
• 4relayoutputs
• 7sensorinputs,
2 of them for Grundfos Direct Sensors™
• 2PWMoutputsforspeedcontrolofhigh-
efciencypumps
• DataloggingontoSDcard
• Drainbackoption
• Time-controlledthermostatfunction
• VBus®
• Energy-savingswitch-modepowersupply
1 Overview
Included:
1 x SOM 9s
1 x accessory bag
3 x screw and wall plug
8 x strain relief and screw
Additionally included in the full kit:
2 x FKP6 sensor
2 x FRP6 sensor
Technical data
Housing:
plastic, PC-ABS and PMMA
Protection type: IP 20 / EN 60 529
Protection class: I
Ambient temp.: 32 ...104 °F
Dimensions: 204 x 170 x 47 mm
Mounting: wall mounting, also suitable for mounting into
patch panels
Display: System-Monitoring-Display for system visuali-
zation, 16-segment display, 7-segment display, 8 symbols,
control lamp (directional pad) and background illumination
Operation: 7 push buttons at the front of the housing
Functions: System controller for solar and heating sys-
tems. Functions such as: DT control, pump speed control,
energy metering, operating hours counter for the solar
pump, evacuated tube collector function, thermostat func-
tion, vertical tank loading, priority logic, drainback option,
booster function, heat dump function, thermal disinfection
function, PWM pump control.
Inputs:
5 inputs for Pt1000 temperature sensors, inputs for 1
Grundfos Direct Sensor™ VFS and 1 Grundfos Direct
Sensor™ RPS, 1 Impulse input V40
Outputs:
3 semiconductor relays, 1 standard relay, 2 PWM outputs
Interfaces: VBus®, SD card slot
Power supply:
100 ... 240V~, 50 ... 60Hz
Switching capacity per relay:
1 (1) A 100 ... 240V~ (semiconductor relay)
2 (1) A 100 ... 240V~(standard relay)
Total switching capacity: 4 A
Standby power consumption: < 1W
Mode of operation: type 1.Y
Note:
For more information about accessories, see
p. 101.
Note:
The SD card is not included with the controller

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SOM 9s
The unit must only be located in dry interior rooms.
The controller must additionally be supplied from a double
pole switch with contact gap of at least 3 mm.
Please pay attention to separate routing of sensor cables
and power supply cables.
In order to mount the device to the wall, carry out the
following steps:
ÎUnscrew the cross-head screw from the cover and re-
move it along with the cover from the housing
ÎMark the upper fastening point on the wall. Drill and
fasten the enclosed wall plug and screw leaving the head
protruding
ÎHang the housing from the upper fastening point and
mark the lower fastening points (centres 150 mm)
ÎInsert lower wall plugs
ÎFasten the housing to the wall with the lower fastening
screws and tighten
ÎCarry out the electrical wiring in accordance with the
terminal allocation, see chap. 2.2
ÎPut the cover on the housing
ÎAttach with the fastening screw
2 Installation
2.1 Mounting
2.2 Electrical connection
Note:
The pump speed must be set to 100 % when
auxiliary relays or valves are connected.
WARNING! Electric shock!
Upon opening the housing, live parts
are exposed.
ÎAlways disconnect the control-
ler from power supply before
opening the housing!
ATTENTION! ESD damage!
Electrostatic discharge can lead to da-
mage to electronic components!
ÎTake care to discharge proper-
ly before touching the inside
ofthedevice!Todoso,touch
a grounded surface such as a
radiator or tap!
upper fastening
point
lower fastening point
cover
screw
Note
Strong electromagnetic fields can impair the
function of the controller.
ÎMake sure the controller as well as the
system are not exposed to strong electro-
magnetic elds.

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SOM 9s
Te mp. Sensor
Pt1000
T4A
100 ... 240V~
1 (1)A(100 ... 240) V~
2 (1)A(100 ... 240) V~
R1-R3
R4
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PWM 1
PWM 2
N
R4
V40
L'
VFS
RPS
The controller is supplied with power via a power supply
cable.The power supply of the device must be 100...240V~
(50 ...60 Hz).
The controller is equipped with 4 relays in total to which
loads such as a pump, a valve, etc. can be connected:
• Relays R1 ... R3 are semiconductor relays, designed for
pump speed control
Conductor R1... R3
Neutral conductor N
Ground terminal
• Relay 4 is a standard relay
Conductor R4
Neutral conductor N
Ground terminal
Depending on the product version, power supply cable and
sensor cables are already connected to the device. If that is
not the case, please proceed as follows:
Connect the temperature sensors (S1 to S5) to the
corresponding terminals with either polarity:
S1 = sensor 1 (collector sensor )
S2 = sensor 2 (e. g. tank sensor bottom)
S3 = sensor 3 (e. g. tank sensor top)
S4 = sensor 4 (e. g. tank sensor tank 2)
S5 = sensor 5 (e. g. collector sensor collector 2)
Connect the Grundfos sensors to theVFS and RPS inputs.
A V40owmeter can be connected to the terminals V40
and GND (either polarity).
The terminals marked “PWM” are control outputs for a
high-efciency pump (PWM1 is allocated to R1 and PWM2
is allocated to R2).
The power supply connection is at the terminals:
Neutral conductor N
Conductor L
Conductor L' (L' is not connected with the power supply
cable. L' is a fused contact permanently carrying voltage)
Ground terminal
WARNING! Electric shock!
Upon opening the housing, live parts
are exposed.
ÎAlways disconnect the control-
ler from power supply before
opening the housing!
WARNING! Electric shock!
L' is a fused contact permanently
carrying voltage
ÎAlways disconnect the control-
ler from power supply before
opening the housing!
Note:
Connecting the device to the power supply must
always be the last step of the installation!
Note:
For more details about the initial commissioning
procedure, see chap. 5, page 73.
Note:
The connection depends on the system selected,
see chap. 2.6.“System layouts”

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2.3 Datacommunication/Bus
The controller is equipped with an SD card slot for storing
system data onto an SD card.The values can be opened and
visualized, e. g. in a spreadsheet programme.
Note:
Do not use an SD-HC card!
A standard SD card is not included with the SOM 9s.
For more information about using an SD card, see chap. 6.2
(page 93) “SD card“.
2.4 SD card slot
The controller is equipped with the VBus®for data transfer
with and energy supply to external modules. The connec-
tion is carried out at the two terminals marked “VBus” and
GND (any polarity). One or more VBus®modules can be
connected via this data bus, such as:
• GA3 Large display module / Smart Display SD3
• AM1 Alarm module
• DL2 Datalogger
Furthermore, the controller can be connected to a PC
via the VBus®/USB or VBus®/LAN interface adapter (not
included with the SOM 9s). With the ServiceCenter Soft-
ware (RSC), measured values can be read, processed and
visualized.The software allows easier function control and
adjustment of the system.
Note:
For more information about accessories, see
p. 101.

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SOM 9s
Standard solar system with 1
tank (page 9)
Solar system with 2 tanks and
heat exchange (page 11)
Solar system with 1 tank and
backup heating (page 13)
Solar system with 1 tank and
3-port valve for vertical tank
loading (page 15)
2-tank system with valve
logic, 1 pump, 3 sensors and
3-port valve (page 17)
2-tank solar system with
pump logic (page 19)
Solar system with east-/west
collectors (page 21)
Solar system with 1 tank and
backup heating with solid fuel
boiler (page23)
Solar system with 1 tank and
heating circuit return prehe-
ating (page 25
Solar system with 1 tank, he-
ating circuit return prehea-
ting and thermostatic backup
heating (page 27)
Solar system with vertical
tank loading and heat ex-
change control (page 29)
Solar system with vertical
tank loading and thermostatic
backup heating (page 31)
Solar system with vertical
tank loading and backup
heating with solid fuel boiler
(page 33)
Solar system with vertical
tank loading and return pre-
heating (page 35)
Solar system with vertical
tank loading and backup
heating with heating backup
(page 37)
2-tank solar system with
valve logic and heat exchange
control (page 40)
2-tank solar system with
pump logic and heat ex-
change control (page 42)
Solar system with east-/west
collectors and heat exchange
control (page 45)
Solar system with east-/west
collectors and thermostatic
backup heating (page 47)
Solar system with east-/west
collectors, thermostatic
backup heating and return
preheating (page 49)
2.5 Overview of the systems
1234
5678
9 10 11 12
13 14 15 16
17 18 19 20

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Solar system with east-/west
collectors and heating circuit
return preheating (page 51)
Solar system with east-/
west collectors, vertical tank
loading and and thermostatic
backup heating (page 62)
Solar system with vertical
tank loading and east-/west
collectors (page 53)
Solar system with east-/west
collectors, vertical tank loa-
ding and backup heating with
solid fuel boiler (page 65)
Solar system with east-/west
collectors and 2 tanks (valve
logic) (page 56)
Solar system with east-/
west collectors, vertical tank
loading and heat exchange
(page 59)
25 26
21 22 23 24

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2.6 System layouts
System 1
Standard solar system with 1 tank
The controller calculates the temperature difference bet-
ween collector sensor S1 and tank sensor S2. If the diffe-
rence is larger than or identical to the adjusted switch-on
Relay Description
R1 Solar pump
R2 optional:
Thermal disinfection
Booster pump
Parallel relay
Heat dump
R3
R4
Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
ARR 1 System 78
LOAD > Loading
DT O 12 °R Switch-on temperature difference 78
DT F 8 °R Switch-off temperature difference 78
DT S 20 °R Set temperature difference 78
RIS 4 °R Rise 78
S MAX 140 °F Tank maximum limitation 78
SMAXS 2 Sensor tank max 79
COL > Collector
CEM 270 °F Collector emergency temperature 80
OCCO** OFF Option collector cooling 80
CMAX 230 °F Maximum collector temperature 80
OCMI OFF Option collector minimum limitation 80
CMIN 50 °F Minimum collector temperature 80
Sensor/Ter-
minal
Designation Description
S1 TCOL Temperature collector
S2 TSTB Temperature tank bottom
S3 Optional sensor for measurement
purposes or options
S4
S5
VFS
RPS
V40
temperature difference, the pump (R1) will be switched on
and the tank will be loaded until the switch-off temperature
difference or the maximum tank temperature is reached.
R1
S2
S1
Temp. Sensor
Pt1000
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PWM 1
PWM 2
N
R4
V40
L'
VFS
RPS
out in

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Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
OTCO OFF Option evacuated tube collector function 81
TCST 07:00 Evacuated tube collector starting time 81
TCEN 19:00 Evacuated tube collector ending time 81
TCRU 30 s Evacuated tube collector runtime 81
TCIN 30 min Evacuated tube collector standstill interval 81
OCFR OFF Option collector frost protection 82
CFR O 40 °F Antifreeze temperature collector on 82
CFR F 42 °F Antifreeze temperature collector off 82
LLOGI > Loading logic
ODB > OFF Drainback option 84
OOVRU* OFF Overrun option 84
COOL > Cooling functions
OSYC** OFF System cooling 85
OSTC OFF Tank cooling 85
OHDP** OFF Heat dump 85
PUMP > Pump speed
PUMP1 OnOF Speed variant pump 1 79
PUMP2 OnOF Speed variant pump 2 79
PUMP3 OnOF Speed variant pump 3 79
MAN > Manual mode
MAN1 Auto Manual mode 1 88
MAN2 Auto Manual mode 2 88
MAN3 Auto Manual mode 3 88
MAN4 Auto Manual mode 4 88
BLPR > OFF Blocking protection 88
OTDIS > OFF Thermal disinfection option 89
OPARR > OFF Parallel relay option 90
OHQM > OFF Energy metering option 90
GFDS > OFF Registration Grundfos sensors 90
PRS* > OFF Pressure monitoring option 92
DATE > OFF Enter date 92
LANG > En Language 93
UNIT > °F Unit 92
OSDC > SD card option 93
CODE 0000 User code 96
RESET OFF Factory setting
* This channel is only available if the Grundfos sensors have been registered in the GFDS channel.
** are blocked against each other

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System 2
Solar system with 2 tanks and heat exchange
The controller calculates the temperature difference bet-
ween collector sensor S1 and tank sensor S2. If the diffe-
rence is larger than or identical to the adjusted switch-on
temperature difference, the pump (R1) will be switched on
and the tank will be loaded until the switch-off temperature
difference or the maximum tank temperature is reached.
Heat exchange between S3 and S4 is possible.
Relay Description
R1 Solar pump
R2 Heat exchange pump
R3 optional:
Thermal disinfection
Booster pump
Parallel relay
Heat dump
R4
Sensor/Ter-
minal
Designation Description
S1 TCOL Temperature collector
S2 TST1B Temperature tank 1 bottom
S3 TST1T Temperature tank 1 top
S4 TST2B Temperature tank 2 top
S5 Optional sensor for measurement
purposes or options
VFS
RPS
V40
Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
ARR 1 2 System 78
LOAD > Loading
DT O 12 °R Switch-on temperature difference 78
DT F 8 °R Switch-off temperature difference 78
DT S 20 °R Set temperature difference 78
RIS 4 °R Rise 78
S MAX 140 °F Tank maximum limitation 79
SMAXS 2 Sensor tank max 79
COL > Collector
CEM 270 °F Collector emergency temperature 80
OCCO** OFF Option collector cooling 80
CMAX 230 °F Maximum collector temperature 80
OCMI OFF Option collector minimum limitation 80
CMIN 50 °F Minimum collector temperature 80
R4
R1
S4
S3
S2
S1
Temp. Sensor
Pt1000
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PWM 1
PWM 2
N
R4
V40
L'
VFS
RPS
out in

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Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
OTCO OFF Option evacuated tube collector function 81
TCST 07:00 Evacuated tube collector starting time 81
TCEN 19:00 Evacuated tube collector ending time 81
TCRU 30 s Evacuated tube collector runtime 81
TCIN 30 min Evacuated tube collector standstill interval 81
OCFR OFF Option collector frost protection 82
CFR O 40 °F Antifreeze temperature collector on 82
CFR F 42 °F Antifreeze temperature collector off 82
LLOGI > Loading logic
ODB > OFF Drainback option 84
OOVRU* OFF Overrun option 84
COOL > Cooling functions
OSYC** OFF System cooling 85
OSTC OFF Tank cooling 85
OHDP** OFF Heat dump 85
DT3 > Heat exchange
DT3O 12 °R Switch-on difference 86
DT3F 8 °R Switch-off difference 86
DT3S 20 °R Set difference 86
RIS3 4 °R Rise 86
MAX3O 140 °F Switch-on temperature (maximum limitation) 86
MAX3F 136 °F Switch-off temperature (maximum limitation) 86
MIN3O 40 °F Switch-on temperature (minimum limitation) 86
MIN3F 50 °F Switch-off temperature (minimum limitation) 86
S2DT3 4 Reference sensor heat sink 86
PUMP > Pump speed
PUMP1 OnOF Speed variant pump 1 79
PUMP2 OnOF Speed variant pump 2 79
PUMP3 OnOF Speed variant pump 3 79
MAN > Manual mode
MAN1 Auto Manual mode 1 88
MAN2 Auto Manual mode 2 88
MAN3 Auto Manual mode 3 88
MAN4 Auto Manual mode 4 88
BLPR > OFF Blocking protection 88
OTDIS > OFF Thermal disinfection option 89
OPARR > OFF Parallel relay option 90
OHQM > OFF Energy metering option 90
GFDS > OFF Registration Grundfos sensors 90
PRS* > OFF Pressure monitoring option 92
DATE> OFF Enter date 92
LANG > En Language 93
UNIT > °F Unit 92
OSDC > SD card option 93
CODE 0000 User code 96
RESET OFF Factory setting
* This channel is only available if the Grundfos sensors have been registered in the GFDS channel.
** are blocked against each other

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SOM 9s
System 3
Solar system with 1 tank and backup heating
The controller calculates the temperature difference bet-
ween collector sensor S1 and tank sensor S2. If the diffe-
rence is larger than or identical to the adjusted switch-on
temperature difference, the pump (R1) will be switched on
and the tank will be loaded until the switch-off temperature
difference or the maximum tank temperature is reached.
Domestic hot water backup heating (R4) can be carried out
with a thermostat function (S3). If the value at S3 reaches
the switch-on temperature for the backup heating, the relay
is energized. If the value exceeds the switch-off temperature
for the backup heating, the relay is switched off again.
Sensor/Ter-
minal
Designation Description
S1 TCOL Temperature collector
S2 TSTB Temperature tank bottom
S3 TSTT Temperature tank top
S4 Optional sensor for measurement
purposes or options
S5
VFS
RPS
V40
Relay Description
R1 Solar pump
R2 optional:
Thermal disinfection
Booster pump
Parallel relay
Heat dump
R3
R4 Backup heating/tank loading pump
Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting Change to Description Page
ARR 1 3 System 78
LOAD > Loading
DT O 12 °R Switch-on temperature difference 78
DT F 8 °R Switch-off temperature difference 78
DT S 20 °R Set temperature difference 78
RIS 4 °R Rise 78
S MAX 140 °F Tank maximum limitation 79
SMAXS 2 Sensor tank max 79
COL > Collector
CEM 270 °F Collector emergency temperature 80
OCCO** OFF Option collector cooling 80
R4
R1
S3
S2
S1
Te mp. Sensor
Pt1000
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PWM 1
PWM 2
N
R4
V40
L'
VFS
RPS
out in

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Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting Change to Description Page
CMAX 230 °F Maximum collector temperature 80
OCMI OFF Option collector minimum limitation 80
CMIN 50 °F Minimum collector temperature 80
OTCO OFF Option evacuated tube collector function 81
TCST 07:00 Evacuated tube collector starting time 81
TCEN 19:00 Evacuated tube collector ending time 81
TCRU 30 s Evacuated tube collector runtime 81
TCIN 30 min Evacuated tube collector standstill interval 81
OCFR OFF Option collector frost protection 82
CFR O 40 °F Antifreeze temperature collector on 82
CFR F 42 °F Antifreeze temperature collector off 82
LLOGI > Loading logic
ODB > OFF Drainback option 84
OOVRU* OFF Overrun option 84
COOL > Cooling functions
OSYC** OFF System cooling 85
OSTC OFF Tank cooling 85
OHDP** OFF Heat dump 85
AH > Backup heating option
AH O 110 °F Backup heating switch-on temperature 87
AH F 120 °F Backup heating switch-off temperature 87
t1O 06:00 Switch-on time 1 88
t1F 22:00 Switch-off time 1 88
t2O 00:00 Switch-on time 2 88
t2F 00:00 Switch-off time 2 88
t3O 00:00 Switch-on time 3 88
t3F 00:00 Switch-off time 3 88
PUMP > Pump speed
PUMP1 OnOF Speed variant pump 1 79
PUMP2 OnOF Speed variant pump 2 79
PUMP3 OnOF Speed variant pump 3 79
MAN > Manual mode
MAN1 Auto Manual mode 1 88
MAN2 Auto Manual mode 2 88
MAN3 Auto Manual mode 3 88
MAN4 Auto Manual mode 4 88
BLPR > OFF Blocking protection 88
OTDIS > OFF Thermal disinfection option 89
OPARR > OFF Parallel relay option 90
OHQM > OFF Energy metering option 90
GFDS > OFF Registration Grundfos sensors 90
PRS* > OFF Pressure monitoring option 92
DATE> Enter date 92
LANG > En Language 93
UNIT > °F Unit 92
OSDC > SD card option 93
CODE 0000 User code 96
RESET OFF Factory setting
* This channel is only available if the Grundfos sensors have been registered in the GFDS channel.
** are blocked against each other

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SOM 9s
R3
R1
S3
S2
S1
Temp. Sensor
Pt1000
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PWM 1
PWM 2
N
R4
V40
L'
VFS
RPS
out in
The controller compares the temperature at sensor S1 to
the temperatures at sensors S2 and S3. If the measured
temperature differences are higher than the adjusted switch-
on temperature differences, the pump (R1) will be activated
and the corresponding tank zone will be loaded up to the
adjusted maximum temperature via the valve (R3).The prio-
rity logic effects prior loading of the upper zone of the tank.
Sensor/Ter-
minal
Designation Description
S1 TCOL Temperature collector
S2 TSTB Temperature tank bottom
S3 TSTT Temperature tank top
S4 Optional sensor for measurement
purposes or options
S5
VFS
RPS
V40
Relay Description
R1 Solar pump
R2/R4 optional:
Thermal disinfection
Parallel relay
Heat dump
R3 3-port valve tank top/bottom
Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
ARR 1 4 System 78
LOAD1 > Loading 1
DT1O 12 °R Switch-on temperature difference 1 78
DT1F 8 °R Switch-off temperature difference 1 78
DT1S 20 °R Set temperature difference 1 78
RIS1 4 °R Rise 1 78
S1MAX 140 °F Tank maximum limitation 1 78
SMXS1 2 Sensor tank max 1 79
LOAD2 > Loading 2
DT2O 12 °R Switch-on temperature difference 2 78
DT2F 8 °R Switch-off temperature difference 2 78
DT2S 20 °R Set temperature difference 2 78
RIS2 4 °R Rise 2 78
S2MAX 140 °F Tank maximum limitation 2 78
System 4
Solar system with 1 tank and 3-port valve for vertical tank loading
Note: 3-port valve normally open - tank bottom

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Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
LST2 ON Loading tank 2 79
COL > Collector
CEM 270 °F Collector emergency temperature 80
OCCO** OFF Option collector cooling 80
CMAX 230 °F Maximum collector temperature 80
OCMI OFF Option collector minimum limitation 80
CMIN 50 °F Minimum collector temperature 80
OTCO OFF Option evacuated tube collector function 81
TCST 07:00 Evacuated tube collector starting time 81
TCEN 19:00 Evacuated tube collector ending time 81
TCRU 30 s Evacuated tube collector runtime 81
TCIN 30 min Evacuated tube collector standstill interval 81
OCFR OFF Option collector frost protection 82
CFR O 40 °F Antifreeze temperature collector on 82
CFR F 42 °F Antifreeze temperature collector off 82
LLOGI > Loading logic
PRIO Priority logic 82
PRIO 2 Priority logic 82
OSTS OFF Tank set option 83
TST1 120 °F Set tank temperature tank 1 83
TST2 120 °F Set tank temperature tank 2 83
tLB 2 min Loading break time 82
tRUN 15 min Circulation runtime 82
PSPEE OFF Pause speed option 83
PDELA OFF Pump delay option 83
OOVRU* OFF Overrun option 84
COOL > Cooling functions
OSYC** OFF System cooling 85
OSTC OFF Tank cooling 85
OHDP** OFF Heat dump 85
PUMP > Pump speed
PUMP1 OnOF Speed variant pump 1 79
PUMP2 OnOF Speed variant pump 2 79
PUMP3 OnOF Speed variant pump 3 79
MAN > Manual mode
MAN1 Auto Manual mode 1 88
MAN2 Auto Manual mode 2 88
MAN3 Auto Manual mode 3 88
MAN4 Auto Manual mode 4 88
BLPR > OFF Blocking protection 88
OTDIS > OFF Thermal disinfection option 89
OPARR > OFF Parallel relay option 90
OHQM > OFF Energy metering option 90
GFDS > OFF Registration Grundfos sensors 90
PRS* > OFF Pressure monitoring option 92
DATE> OFF Enter date 92
LANG > En Language 93
UNIT > °F Unit 92
OSDC > SD card option 93
CODE 0000 User code 96
RESET OFF Factory setting
* This channel is only available if the Grundfos sensors have been registered in the GFDS channel.
** are blocked against each other

© Stiebel 11091_SOM_9s.monus.indd
17 |
SOM 9s
The controller compares the temperature at sensor S1 to
the temperatures at sensors S2 and S4.If the measured tem-
perature differences are higher than the adjusted switch-on
temperature differences, the pump (R1) will be activated and
the corresponding tank will be loaded up to the adjusted
maximum temperature via the valve (R3).Tank 1 is loaded
with priority.
Sensor/Ter-
minal
Designation Description
S1 TCOL Temperature collector
S2 TST1B Temperature tank 1 bottom
S3 Optional sensor for measurement
purposes or options
S4 TST2B Temperature tank 2 bottom
S5 Optional sensor for measurement
purposes or options
VFS
RPS
V40
Relay Description
R1 Solar pump
R2/R4 optional:
Thermal disinfection
Parallel relay
Heat dump
R3 3-port valve tank 1 / 2
Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
ARR 1 5 System 78
LOAD1 > Loading 1
DT1O 12 °R Switch-on temperature difference 1 78
DT1F 8 °R Switch-off temperature difference 1 78
DT1S 20 °R Set temperature difference 1 78
RIS1 4 °R Rise 1 78
S1MAX 140 °F Tank maximum limitation 1 78
SMXS1 2 Sensor tank max 1 79
LOAD2 > Loading 2
DT2O 12 °R Switch-on temperature difference 2 78
DT2F 8 °R Switch-off temperature difference 2 78
System 5
2-tanksystemwithvalvelogic,1pump,3sensorsand3-portvalve
R3
R1
S4
S2
S1
Temp. Sensor
Pt1000
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PWM 1
PWM 2
N
R4
V40
L'
VFS
RPS
out in
Note: 3-port valve normally open - tank 1 (S2)

© Stiebel 11091_SOM_9s.monus.indd
|18
SOM 9s
Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
DT2S 20 °R Set temperature difference 2 78
RIS2 4 °R Rise 2 78
S2MAX 140 °F Tank maximum limitation 2 78
SMXS2 4 Sensor tank max 2 79
LST2 ON Loading tank 2 79
COL > Collector
CEM 270 °F Collector emergency temperature 80
OCCO** OFF Option collector cooling 80
CMAX 230 °F Maximum collector temperature 80
OCMI OFF Option collector minimum limitation 80
CMIN 50 °F Minimum collector temperature 80
OTCO OFF Option evacuated tube collector function 81
TCST 07:00 Evacuated tube collector starting time 81
TCEN 19:00 Evacuated tube collector ending time 81
TCRU 30 s Evacuated tube collector runtime 81
TCIN 30 min Evacuated tube collector standstill interval 81
OCFR OFF Option collector frost protection 82
CFR O 40 °F Antifreeze temperature collector on 82
CFR F 42 °F Antifreeze temperature collector off 82
FRPST 1 Antifreeze tank selection 82
LLOGI > Loading logic
PRIO Priority logic 82
PRIO 1 Priority logic 82
OSTS OFF Tank set option 83
TST1 120 °F Set tank temperature tank 1 83
TST2 120 °F Set tank temperature tank 2 83
tLB 2 min Loading break time 82
tRUN 15 min Circulation runtime 82
PSPEE OFF Pause speed option 83
PDELA OFF Pump delay option 83
OOVRU* OFF Overrun option 84
COOL > Cooling functions
OSYC** OFF System cooling 85
OSTC OFF Tank cooling 85
OHDP** OFF Heat dump 85
PUMP > Pump speed
PUMP1 OnOF Speed variant pump 1 79
PUMP2 OnOF Speed variant pump 2 79
PUMP3 OnOF Speed variant pump 3 79
MAN > Manual mode
MAN1 Auto Manual mode 1 88
MAN2 Auto Manual mode 2 88
MAN3 Auto Manual mode 3 88
MAN4 Auto Manual mode 4 88
BLPR > OFF Blocking protection 88
OTDIS > OFF Thermal disinfection option 89
OPARR > OFF Parallel relay option 90
OHQM > OFF Energy metering option 90
GFDS > OFF Registration Grundfos sensors 90
PRS* > OFF Pressure monitoring option 92
DATE> Enter date 92
LANG > En Language 93
UNIT > °F Unit 92
OSDC > SD card option 93
CODE 0000 User code 96
RESET OFF Factory setting
* This channel is only available if the Grundfos sensors have been registered in the GFDS channel.
** are blocked against each other

© Stiebel 11091_SOM_9s.monus.indd
19 |
SOM 9s
System 6
2-tank solar system with pump logic
The controller compares the temperature at sensor S1 to
the temperatures at sensors S2 and S4. If the measured
temperature differences are higher than the adjusted switch-
on temperature differences, the pump (R1 and R2) will be
activated and the corresponding tank will be loaded up to
the adjusted maximum temperature at most.
Sensor/Ter-
minal
Designation Description
S1 TCOL Temperature collector
S2 TST1B Temperature tank 1 bottom
S3 Optional sensor for measurement
purposes or options
S4 TST2B Temperature tank 2 bottom
S5 Optional sensor for measurement
purposes or options
VFS
RPS
V40
Relay Description
R1 Solar pump tank 1
R2 Solar pump tank 2
R3 optional:
Thermal disinfection
Parallel relay
Heat dump
R4
Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
ARR 1 6 System 78
LOAD1 > Loading 1
DT1O 12 °R Switch-on temperature difference 1 78
DT1F 8 °R Switch-off temperature difference 1 78
DT1S 20 °R Set temperature difference 1 78
RIS1 4 °R Rise 1 78
S1MAX 140 °F Tank maximum limitation 1 78
SMXS1 2 Sensor tank max 1 79
LOAD2 > Loading 2
DT2O 12 °R Switch-on temperature difference 2 78
DT2F 8 °R Switch-off temperature difference 2 78
DT2S 20 °R Set temperature difference 2 78
RIS2 4 °R Rise 2 78
R2R1
S4
S2
S1
Temp. Sensor
Pt1000
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PWM 1
PWM 2
N
R4
V40
L'
VFS
RPS
out in

© Stiebel 11091_SOM_9s.monus.indd
|20
SOM 9s
Adjustment channels
Channel Sub channel 1 Sub channel 2 Factory
setting
Change to Description Page
S2MAX 140 °F Tank maximum limitation 2 78
SMXS2 4 Sensor tank max 2 79
LST2 ON Loading tank 2 79
COL > Collector
CEM 270 °F Collector emergency temperature 80
OCCO** OFF Option collector cooling 80
CMAX 230 °F Maximum collector temperature 80
OCMI OFF Option collector minimum limitation 80
CMIN 50 °F Minimum collector temperature 80
OTCO OFF Option evacuated tube collector function 81
TCST 07:00 Evacuated tube collector starting time 81
TCEN 19:00 Evacuated tube collector ending time 81
TCRU 30 s Evacuated tube collector runtime 81
TCIN 30 min Evacuated tube collector standstill interval 81
OCFR OFF Option collector frost protection 82
CFR O 40 °F Antifreeze temperature collector on 82
CFR F 42 °F Antifreeze temperature collector off 82
FRPST 1 Antifreeze tank selection 82
LLOGI > Loading logic
PRIO Priority logic 82
PRIO 1 Priority logic 82
OSTS OFF Tank set option 83
TST1 120 °F Set tank temperature tank 1 83
TST2 120 °F Set tank temperature tank 2 83
OSE OFF Spread function option 83
DTSE 40 Spread difference 83
tLB 2 min Loading break time 82
tRUN 15 min Circulation runtime 82
PSPEE OFF Pause speed option 83
PDELA OFF Pump delay option 83
OOVRU* OFF Overrun option 84
COOL > Cooling functions
OSYC** OFF System cooling 85
OSTC OFF Tank cooling 85
OHDP** OFF Heat dump 85
PUMP > Pump speed
PUMP1 OnOF Speed variant pump 1 79
PUMP2 OnOF Speed variant pump 2 79
PUMP3 OnOF Speed variant pump 3 79
MAN > Manual mode
MAN1 Auto Manual mode 1 88
MAN2 Auto Manual mode 2 88
MAN3 Auto Manual mode 3 88
MAN4 Auto Manual mode 4 88
BLPR > OFF Blocking protection 88
OTDIS > OFF Thermal disinfection option 89
OPARR > OFF Parallel relay option 90
OHQM > OFF Energy metering option 90
GFDS > OFF Registration Grundfos sensors 90
PRS* > OFF Pressure monitoring option 92
DATE> Enter date 92
LANG > En Language 93
UNIT > °F Unit 92
OSDC > SD card option 93
CODE 0000 User code 96
RESET OFF Factory setting
* This channel is only available if the Grundfos sensors have been registered in the GFDS channel.
** are blocked against each other