Resol DeltaSol CS/2 User manual

Thank you for buying this RESOL product.
Please read this manual carefully to get the best performance from this unit.
Please keep this manual carefully.
Manual
www.resol.com
en
Solar controller
Manual for the
specialised craftsman
Installation
Operation
Functions and options
Troubleshooting
Version 1.11
*11204303* 11204303
DeltaSol®CS/2

2
en
© 20180618_11204303_DeltaSol_CS2.monen.indd
Safety advice
Please pay attention to the following safety advice in order to avoid danger and
damage to people and property.
Instructions
Attention must be paid to the valid local standards, regulations and directives!
Information about the product
Proper usage
The solar controller is designed for electronically controlling standard solar thermal
systems in compliance with the technical data specied in this manual.
Improper use excludes all liability claims.
CE Declaration of conformity
The product complies with the relevant directives and is therefore
labelled with the CE mark. The Declaration of Conformity is available
upon request, please contact the manufacturer.
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 electromagnetic elds.
Subject to technical change. Errors excepted.
Target group
These instructions are exclusively addressed to authorised skilled personnel.
Only qualied electricians are allowed to carry out electrical works
Initial commissioning must be effected by the system installer or qualied personnel
named by the system installer.
Description of symbols
WARNING! Warnings are indicated with a warning triangle!
ÎThey contain information on how to avoid the danger
described.
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
Note
Notes are indicated with an information symbol.
ÎArrows indicate instruction steps that should be carried out.
Disposal
• Dispose of the packaging in an environmentally sound manner.
• Dispose of old appliances in an environmentally sound manner. Upon request we
will take back your old appliances bought from us and guarantee an environmen-
tally sound disposal of the devices.

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Contents
1 Overview .............................................................................................. 4
2 Installation ........................................................................................... 5
2.1 Mounting ........................................................................................................................5
2.2 Electrical connection ...................................................................................................5
2.3 VFD Grundfos Direct Sensor™...............................................................................6
2.4 PWM output..................................................................................................................6
2.5 Data communication / Bus ..........................................................................................6
2.6 Terminal allocation.......................................................................................................7
3 Operation and function ...................................................................... 9
3.1 Buttons ...........................................................................................................................9
4 System-Monitoring-Display ................................................................ 9
4.1 Flashing codes ............................................................................................................ 10
Solar controller DeltaSol®CS/2
The DeltaSol®CS/2 controller is used for the speed control of a HE pump in
small standard solar thermal and heating systems.
It is equipped with a PWM output and an additional input for a VFD Grundfos Di-
rect SensorTM that enables a precise heat quantity measurement.
The commissioning menu will lead you through the most important adjustments for
the initial conguration in only eight steps.
5 Commissioning.................................................................................. 11
6 Channel overview .............................................................................. 13
6.1 Display channels......................................................................................................... 13
6.2 Adjustment channels ................................................................................................ 15
7 Troubleshooting................................................................................. 24
8 Accessories ........................................................................................ 27
8.1 Sensors and measuring instruments ..................................................................... 28
8.2 VBus®accessories ..................................................................................................... 28
8.3 Interface adapters...................................................................................................... 28
9 Index ................................................................................................... 29

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1 Overview
• Especially designed for the speed control of high-efciency pumps
• 1 input for aVFD Grundfos Direct SensorTM
• System-Monitoring-Display
• Up to 4 Pt1000 temperature sensors
• Semiconductor relay for pump speed control
• HE pump control
• Heat quantity measurement
• Commissioning menu
• Function control
• Drainback option
• Unit °F and °C selectable
Technical data
Inputs: 4 Pt1000 temperature sensors, 1 VFD Grundfos Direct SensorTM
Outputs: 1 semiconductor relays, 1 PWM output
PWM frequency: 512 Hz
PWM voltage: 10.5 V
Switching capacity: 1 (1) A 240 V~ (semiconductor relay)
Total switching capacity: 1 A 240 V~
Power supply: 100 … 240 V~ (50 … 60 Hz)
Supply connection: type Y attachment
Standby: 0.58 W
Mode of operation: type 1.C.Y action
Rated impulse voltage: 2.5 kV
Data interface: RESOL VBus®
VBus®current supply: 35 mA
Functions: function control, operating hours counter, speed control, drainback
option and heat quantity measurement
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting, mounting into patch panels is possible
Indication / Display: System-Monitoring-Display for visualisation of systems,
16-segment and 7-segment display, 8 symbols for indication of system status
Operation: 3 push buttons at the front
Ingress protection: IP 20 / EN 60529
Protection class: I
Ambient temperature: 0 … 40 °C
Pollution degree: 2
Dimensions: 172 x 110 x 46 mm
110
30
62
172
46
130
Upper fastening
Lower fastening

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
2 Installation
2.1 Mounting
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the device from power supply
before opening the housing!
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 electromagnetic elds.
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 mains cables.
In order to mount the device to the wall, carry out the following steps:
ÎUnscrew the crosshead screw from the cover and remove 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
point (centres 130 mm).
ÎInsert lower wall plug.
ÎFasten the housing to the wall with the lower fastening screw and tighten.
ÎCarry out the electrical wiring in accordance with the terminal allocation (see
chapter 2.2).
ÎPut the cover on the housing.
ÎAttach with the fastening screw.
display
cable conduits
with strain relief
cover button
fuse T2A
2.2 Electrical connection
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the device from power supply be-
fore opening the housing!
ATTENTION! ESD damage!
Electrostatic discharge can lead to damage to electronic
components!
ÎTake care to discharge properly before touching the
inside of the device!
Note
The mains connection must be carried out with the common ground of
the building to which the pipework of the solar circuit is connected.
Note
Connecting the device to the power supply must always be the last step
of the installation!
Note
The pump speed must be set to 100% when auxiliary relays or valves are
connected.

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Installation Indications, functions and options MessagesCommissioningOperation and function
Note
It must be possible to disconnect the device from the mains at any time.
ÎInstall the mains plug such that it is accessible at any time.
ÎIf this is not possible, install a switch that can be accessed.
Do not use the device if it is visibly damaged!
The power supply of the device must be 100 … 240 V~ (50 … 60 Hz). Attach exible
cables to the housing with the enclosed strain relief and the corresponding screws.
The controller is equipped with 1 semiconductor relay to which loads such as
pumps, valves, etc. can be connected:
Relay 1
18 = Conductor R1
17 = Neutral conductor N
13 = Protective earth conductor ⏚
The mains connection is at the following terminals:
19 = Neutral conductor N
20 = Conductor L
12 = Protective earth conductor ⏚
Connect the temperature sensors (S1 to S4) to the corresponding terminals
with either polarity:
1 / 2 = Sensor 1 (e. g. collector sensor)
3 / 4 = Sensor 2 (e. g. store sensor)
5 / 6 = Sensor 3 (e. g. store sensor top)
7 / 8 = Sensor 4 (e. g. return sensor)
1 (1) A 240 V~
LN
R1
N
2019
18
171615
14131212
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM
VFD
345678910
Fuse
VBus®mains
terminals
load
terminals
sensor terminals protective earth
conductor terminal
2.3 VFD Grundfos Direct Sensor™
The controller is equipped with 1 input for a digital VFD Grundfos Direct Sensor™
for measuring the ow rate and the temperature. Connection is made at the VFD
terminal (bottom left).
2.4 PWM output
Speed control of a HE pump is possible via a PWM signal. The pump has to be
connected to the relay as well as to the PWM output of the controller. Power is
supplied to the HE pump by switching the corresponding relay on or off.
The two pins on the left-hand side of the connector marked PWM are the control
output for a pump with PWM control input. The two pins on the right-hand side
are not used.
2
1
1 (1) A 240 V~
LN
R1
N
2019
18
17161514131212
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM
VFD
345678910
1 = PWM output 1, control signal
2 = PWM output 1, GND
2.5 Data communication / Bus
The controller is equipped with the RESOL VBus®for data transfer and energy
supply to external modules. The connection is to be carried out at the terminals
marked VBus (either polarity).
One or more RESOL VBus®modules can be connected via this data bus, such as:
• RESOL DL2 Datalogger
• RESOL DL3 Datalogger
Furthermore, the controller can be connected to a PC or integrated into a net-
work via the VBus®/USB or VBus®/LAN interface adapter (not included). Different
solutions for visualisation and remote parameterisation are availabe on the RESOL
website www.resol.com.
Note
More accessories on page 27.

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
2.6 Terminal allocation
S1
S3
S2
R1
exemplary
drainback system layout
The controller calculates the temperature difference between collector sensor S1
and store sensor S2. If the difference is larger than or identical to the adjusted
switch-on temperature difference (DT O), the solar pump will be activated by relay
1, and the store will be loaded until the switch-off temperature difference (DT F) or
the maximum store temperature (S MX) is reached.
Sensors S3 and S4 can optionally be connected. S3 can optionally be used as the
reference sensor for the store emergency shutdown option (OSEM).
If heat quantity measurement (OHQM) is activated, S4 and VFD are used as the
ow and return sensors.
910
VBus
PWM 1/2
VFD
S1
S2
S4 / VFD / TR
S4 / VFD / TFL
R1 S3 / TSTT

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Installation Indications, functions and options MessagesCommissioningOperation and function
Display channels
Channel Description Connection terminal Page
INIT x* ODB initialisation active - 13
FLL x* ODB lling time active - 13
STAB x* ODB stabilisation in progress - 13
COL x Temperature collector S1 13
TST x Temperature store S2 13
S3 x Temperature sensor 3 S3 14
TSTT x* Temperature store top S3 13
S4 x Temperature sensor 4 S4 14
TFL x* Temperature ow sensor S1 / S4 / VFD 14
TR x* Temperature return sensor S4 / VFD 14
VFD x* Temperature Grundfos Direct Sensor™ VFD 14
L/h x* Flow rate Grundfos Direct Sensor™ VFD 14
n % x Speed R1 14
hP x Operating hours R1 15
kWh x* Heat quantity in kWh - 14
MWh x* Heat quantity in MWh - 14
TIME x Time - 17
Adjustment channels
Channel Description Factory setting Page
DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra] 15
DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra] 15
DT S x Set temperature difference R1 10.0 K [20.0 °Ra] 16
RIS x Rise R1 2 K [4 °Ra] 16
PUM x Pump control type R1 PSOL 16
nMN x Minimum speed R1 30 % 16
nMX x Maximum speed R1 100 % 17
S MX x Maximum store temperature 60 °C [140 °F] 17
OSEM x Store emergency shutdown option OFF 17
EM x
Collector emergency temperature 130 °C [270 °F] 17
Collector emergency temperature if ODB is
activated:
95 °C [200 °F] 17
OCC x Collector cooling option OFF 18
CMX x* Maximum collector temperature 110 °C [230 °F] 18
OSYC x System cooling option OFF 18
Adjustment channels
Channel Description Factory setting Page
DTCO x* Switch-on temperature difference cooling 20.0 K [40.0°Ra] 18
DTCF x* Switch-off temperature difference cooling 15.0 K [30.0 °Ra] 18
OSTC x Store cooling option OFF 19
OHOL x* Holiday cooling option OFF 19
THOL x* Holiday cooling temperature 40 °C [110 °F] 19
OCN x Collector minimum limitation option OFF 19
CMN x* Collector minimum temperature 10 °C [50 °F] 19
OCF x Antifreeze option OFF 19
CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 19
GFD x Grundfos Direct Sensor™ OFF 20
OHQM x Heat quantity measurement option OFF 20
SEN x* VFD allocation 2 21
FMAX x* Maximum ow rate 6.0 l/min 20
MEDT x* Antifreeze type 1 21
MED% x* Antifreeze concentration (only if MEDT =
propylene or ethylene glycol)
45 % 21
ODB x Drainback option OFF 21
tDTO x* ODB switch-on condition - time period 60 s 22
tFLL x* ODB lling time 5.0 min 22
tSTB x* ODB stabilisation time 2.0 min 22
MAN x Manual mode R1 Auto 22
LANG x Language dE 22
UNIT x Temperature unit °C 23
RESE x Reset - back to factory settings 23
######## Version number
Legend:
Symbol Description
x Channel is available
x* Channel is available, if the corresponding option is activated.

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
3 Operation and function
3.1 Buttons
1
3
2backwards (-)
forwards (+)
Ⓢ(selection /
adjustment mode)
The controller is operated via the 3 push buttons below the display.
Button 1 (+) is used for scrolling forwards through the menu and increasing
adjustment values. Button 2 (-) is used for scrolling backwards through the menu
and reducing adjustment values. Button 3 (OK) is used for selecting channels and
conrming adjustments.
During normal operation, display channels will be displayed.
ÎIn order to scroll between display channels, press buttons 1 and 2.
Access to adjustment channels:
ÎUse button 1 in order to scroll to the last display channel, then press and hold
down button 1 for approx. 2 s.
If an adjustment channel is shown on the screen, Ⓢwill be displayed on the
right-hand side next to the channel name.
ÎPress button 3 in order to select an adjustment channel.
Ⓢ starts ashing.
ÎAdjust the desired value with buttons 1 and 2.
ÎBriey press button 3.
Ⓢpermanently appears, the adjusted value has been saved.
4 System-Monitoring-Display
System-Monitoring-Display
The System-Monitoring-Display consists of 3 blocks: channel display, tool bar and
system screen.
Channel display
The channel display consists of 2 lines. The upper display line is an alphanumeric
16-segment display. In this line, mainly channel names and menu items are displayed.
In the lower 16-segment display, values are displayed.
Tool bar
The additional symbols in the tool bar indicate the current system state.

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Installation Indications, functions and options MessagesCommissioningOperation and function
Permanently
shown Flashing Status indications:
⓵Relay 1 active
☼Maximum store temperature exceeded
⚠+ ☼Store emergency shutdown active
⚠Collector emergency shutdown active
⓵ ☼ Collector cooling active
⓵ ☼ System cooling active
⓵+ ☼Store cooling active
☼ ⚠ Holiday cooling option activated
⓵+ ☼ ⚠ Holiday cooling active
❄Collector minimum limitation active
❄Antifreeze function activated
⓵ ❄ Antifreeze function active
☛+ ⓵ ⚠ Manual mode relay 1 ON
☛ ⚠ Manual mode relay 1 OFF
☍ ⚠ Sensor fault
System screen
The system selected is indicated in the System-Monitoring-Display. It consists of
several system component symbols which are – depending on the current status of
the system – either ashing, permanently shown or not indicated.
Pump
Store
with heat exchanger
Temperature
sensor
Collector
with collector sensor
4.1 Flashing codes
• Pump is ashing when the relay is switched on
• Sensor symbols are ashing, if the corresponding sensor display channel is se-
lected
• Sensors are ashing quickly in the case of a sensor fault

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
1. Language
ÎAdjust the desired menu language.
LANG
Language selection
Selection: dE, En, Fr, ES, It
Factory setting: dE
2. Temperature unit
ÎAdjust the desired unit.
UNIT
Temperature unit
Selection: °F, °C
Factory setting: °C
3. Maximum store temperature
ÎAdjust the desired maximum store temperature.
S MX
Maximum store temperature
Adjustment range: 4 … 95 °C [40 … 200 °F]
Factory setting: 60 °C [140 °F]
Note
The controller is also equipped with a non-ad-
justable emergency shutdown, deactivating
the system if the store reaches 95 °C [200°F].
Commissioning
5 Commissioning
1
3
2backwards (-)
forwards (+)
Ⓢ(selection /
adjustment mode)
ÎConnect the device to the mains
The controller runs an initialisation phase.
When the controller is commissioned or when it is reset, it will run a commission-
ing menu. The commissioning menu leads the user through the most important
adjustment channels needed for operating the system.
Adjustment mode ashing
Operation
Changing a value ashing
Conrming a value not ashing
to the next
parameter
1
1
3
3
2
2

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Installation Indications, functions and options MessagesCommissioningOperation and function
6. Pump control type
ÎAdjust the pump control type.
PUM
Pump control type
Selection: OnOF, PULS, PSOL, PHEA
Factory setting: PSOL
The following types can be selected:
Adjustment for standard pump without speed control
• OnOF (pump on / pump off)
Adjustment for standard pump with speed control
• PULS (burst control via semiconductor relay)
Adjustment for high-efciency pump (HE pump)
• PSOL (PWM prole for a HE solar pump)
• PHEA (PWM prole for a HE heating pump)
7. Minimum speed
ÎAdjust the minimum speed for the corresponding
pump.
nMN
Minimum speed
Adjustment range: (10) 30 … 100 %
Factory setting: 30 %
Note
The pump speed must be set to 100% when
auxiliary relays or valves are connected.
8. Maximum speed
ÎAdjust the maximum speed for the corresponding
pump.
nMX
Maximum speed
Adjustment range: (10) 30 … 100 %
Factory setting: 100 %
Note
The pump speed must be set to 100% when
auxiliary relays or valves are connected.
Conrmation
Completing the commissioning menu
After the last channel of the commissioning menu has
been adjusted and conrmed, the controller asks for
conrmation of the adjustments.
ÎIn order to conrm the adjustments made in the
commissioning menu, press button 3.
The controller is then ready for operation with the
adjustments made for the system selected .
Note
The adjustments carried out during commis-
sioning can be changed anytime in the cor-
responding adjustment channel. Additional
functions and options can also be activated or
deactivated (see page 15).
CommissioningCommissioning

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
Display of collector temperatures
COL
Collector temperature
Display range: -40 … +260 °C [-40 … +500 °F]
Indicates the collector temperatures.
Display of store temperatures
TST,TSTT
Store temperatures
Display range: -40 … +260 °C [-40 … +500 °F]
Indicates the store temperatures.
• TST : Store temperature (1-store system)
• TSTT : Store temperature top
6 Channel overview
6.1 Display channels
Note
The display and adjustment channels as well as the adjustment ranges de-
pend on the system selected, the functions and options as well as on the
system components connected to the controller.
Display of drainback time periods
Initialisation
INIT
ODB initialisation active
Indicates the time adjusted in tDTO, running backwards.
Filling time
FLL
ODB lling time active
Indicates the time adjusted in tFLL, running backwards.
Stabilisation
STAB
ODB stabilisation in progress
Indicates the time adjusted in tSTB, running backwards.

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Installation Indications, functions and options MessagesCommissioningOperation and function
Display of sensors 3, 4 and VFD
S3, S4,VFD
Sensor temperatures
Display range: -40 … +260 °C [-40 … +500 °F]
VFD: 0 … 100 %
Indicates the current temperature at the corresponding additional sensor (without
control function).
• S3 : Temperature at sensor 3
• S4 : Temperature at sensor 4
• VFD : Grundfos Direct Sensor™
Note
S3 and S4 will only be indicated if the temperature sensors are connected
to the corresponding terminals.VFD will be indicated only if a Grundfos
Direct Sensor™ has been connected and registered.
Display of further temperatures
TFL,TR
Further measured temperatures
Display range: -40 … +260 °C [-40 … +500 °F]
Indicates the current temperature at the corresponding sensor.The display of these
temperatures depends on the system selected.
• TFL : Temperature ow
• TR : Temperature return
Note
TFL / TR will be indicated only if the heat quantity measurement option
(OHQM) has been activated.
Display of ow rate
l/h
Flow rate
Display range: depending on the sensor type used
Indicates the current ow rate at the VFD ow rate sensor.
The display range depends on the sensor type previously selected.
Display of current pump speed
n %
Current pump speed
Display range: 30 … 100 %
Indicates the current pump speed.
kWh/MWh
Heat quantity in kWh / MWh
Display channel
Indicates the energy gained in heat quantity – only available if heat quantity meas-
urement (OHQM) is activated.
The heat quantity measurement can be carried out in 2 different ways (see page
20): with a xed ow rate value or with a VFD Grundfos Direct Sensor™. It is
shown in kWh in the channel kWh and in MWh in the channel MWh.The overall
heat quantity results from the sum of both values.
The accumulated heat quantity can be set back to zero.As soon as one of the dis-
play channels of the heat quantity is selected, the symbol Ⓢis displayed.
ÎIn order to access the reset mode of the counter, press button 3 for approx. 2 s.

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
Ⓢ starts ashing and the heat quantity value will be set back to zero.
ÎIn order to nish the reset process, press button 3.
In order to interrupt the reset process, do not press any button for about 5 s.The
display returns to the display mode.
Operating hours counter
h P
Operating hours counter
Display channel
The operating hours counter accumulates the operating hours of the correspond-
ing relay (h P). Full hours are displayed.
The accumulated operating hours can be set back to zero.As soon as an operating
hours channel is selected, the symbol Ⓢis displayed.
ÎIn order to access the reset mode of the counter, press button 3 for approx. 2 s.
Ⓢ starts ashing and the operating hours will be set back to zero.
ÎIn order to nish the reset process, press button 3.
In order to interrupt the reset process, do not press any button for about 5s.The
display returns to the display mode.
6.2 Adjustment channels
∆T control
DT O
Switch-on temperature difference
Adjustment range: 1.0 … 20.0 K [2.0 … 40.0 °Ra]
Factory setting: 6.0 K [12.0 °Ra]
The controller works as a standard differential controller. If the temperature reach-
es or exceeds the switch-on temperature difference, the pump switches on.
When the temperature difference reaches or falls below the adjusted switch-off
temperature difference, the respective relay switches off.
Note
The switch-on temperature difference must be at least 0.5K [1 °Ra] higher
than the switch-off temperature difference.
DT F
Switch-off temperature difference
Adjustment range: 0.5 … 19.5 K [1.0 … 39.0°Ra]
Factory setting: 4.0 K [8.0 °Ra]
Note
If the drainback option ODB is activated, the values of the parameters
DT O, DT F and DT S will be adapted to values suiting drainback systems:
DT O= 10 K [20 °Ra]
DT F = 4 K [8 °Ra]
DT S = 15 K [30 °Ra]
Adjustments that have been previously made in these channels will be
overridden and have to be entered again if ODB is deactivated later on.

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Installation Indications, functions and options MessagesCommissioningOperation and function
Speed control
DT S
Set temperature difference
Adjustment range:
1.5 … 30.0 K [3.0 … 60.0 °Ra]
Factory setting: 10.0 K [20.0 °Ra]
RIS
Rise
Adjustment range:
1 … 20 K [2 … 40 °Ra]
Factory setting: 2 K [4 °Ra]
Note
For pump speed control, the operating mode of the corresponding relay
must be set to Auto (adjustment channel MAN).
If the temperature difference reaches or exceeds the switch-on temperature differ-
ence, the pump switches on at 100 % speed for 10 s.Then, the speed is reduced to
the minimum pump speed value.
If the temperature difference reaches the adjusted set value, the pump speed in-
creases by one step (10%).The response of the controller can be adapted via the
parameter Rise. Each time the difference increases by the adjustable rise value, the
pump speed increases by 10% until the maximum pump speed of 100% is reached.
If the temperature difference decreases by the adjustable rise value, pump speed
will be decreased by one step.
Note
The set temperature difference must be at least 0.5K [1 °Ra] higher than
the switch-on temperature difference.
PUM
Pump control type
Selection: OnOF, PULS, PSOL, PHEA
Factory setting: PSOL
With this parameter, the pump control type can be adjusted. The following types
can be selected:
Adjustment for standard pump without speed control
• OnOF (pump on / pump off)
Adjustment for standard pump with speed control
• PULS (burst control via semiconductor relay)
Adjustment for high-efciency pump (HE pump)
• PSOL (PWM prole for a HE solar pump)
• PHEA (PWM prole for a HE heating pump)
Minimum speed
nMN
Minimum speed
Adjustment range: (10) 30 … 100 %
Factory setting: 30 %
nMN, n1MN, if ODB is activated: 50 %
In the adjustment channel nMN, a relative minimum pump speed for a pump con-
nected can be allocated to the output R1.
Note
The pump speed must be set to 100% when auxiliary relays or valves are
connected.

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
nMX
Maximum speed
Adjustment range: (10) 30 … 100 %
Factory setting: 100 %
In the adjustment channel nMX, a relative maximum speed for a pump connected
can be allocated to the output R1.
Note
The pump speed must be set to 100% when auxiliary relays or valves are
connected.
Maximum store temperature
S MX
Maximum store temperature
Adjustment range: 4 … 95 °C [40 … 200 °F]
Arr 10: 4 … 90 °C [40 … 190 °F]
Factory setting: 60 °C [140 °F]
If the store temperature reaches the adjusted maximum temperature, the store will
no longer be loaded in order to avoid damage caused by overheating.A non-adjust-
able hysteresis of 2 K [4 °Ra] is set for the maximum store temperature.
If the maximum store temperature is exceeded, ☼is displayed.
Note
If the collector cooling or the system cooling function is activated, the
adjusted maximum store temperature may be exceeded. In order to pre-
vent system damage, the controller is also equipped with an integrated
store emergency shutdown, deactivating the system if the store reaches
95 °C [200 °F].
Store emergency shutdown
OSEM
Store emergency shutdown option
Adjustment range: ON, OFF
Factory setting: OFF
This option is used for activating the internal store emergency shutdown for an up-
per store sensor. If the temperature at the reference sensor exceeds 95 °C, store 1
will be blocked and loading will be stopped until the temperature falls below 90 °C.
Note
Sensor S3 ist used as the reference sensor.
Collector limit temperature
Collector emergency shutdown
EM
Collector limit temperature
Adjustment range: 80 … 200 °C [170 … 390 °F]
Factory setting: 130 °C [270 °F]
When the collector temperature exceeds the adjusted collector limit tempera-
ture, the solar pump (R1) switches off in order to protect the system components
against overheating (collector emergency shutdown). If the collector limit temper-
ature is exceeded, ⚠is displayed.
Note
If the drainback option ODB is activated, the adjustment range of EM will
change to 80 … 120 °C [170 … 250°F]. The factory setting in that case is
95 °C [200 °F].

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Installation Indications, functions and options MessagesCommissioningOperation and function
Cooling functions
In the following the 3 cooling functions – collector cooling, system cooling and store
cooling – are described in detail. The following note is valid for all three cooling
functions:
Note
The cooling functions will not become active as long as solar loading is possible.
Collector cooling
OCC
Collector cooling option
Adjustment range: OFF / ON
Factory setting: OFF
CMX
Collector maximum temperature
Adjustment range: 70 … 160 °C [150 … 320 °F]
Factory setting: 110 °C [230 °F]
The collector cooling function keeps the collector temperature within the operat-
ing range by heating the store. If the store temperature reaches 95°C [200 °F] the
function will switch off for safety reasons.
If the store temperature exceeds the adjusted maximum store temperature, the
solar system is switched off. If the collector temperature increases to the adjusted
maximum collector temperature, the solar pump is activated until the collector
temperature falls below the maximum collector temperature. The store temper-
ature may then exceed the maximum store temperature, but only up to 95°C
[200 °F] (emergency shutdown of the store).
If the collector cooling function is active, ⓵and ☼ are displayed (ashing).
Note
This function will only be available if the system cooling function (OSYC)
is deactivated.
System cooling
OSYC
System cooling option
Adjustment range: OFF / ON
Factory setting: OFF
DTCO
Switch-on temperature difference
Adjustment range:
1.0 … 30.0 K [2.0 … 60.0 °Ra]
Factory setting: 20.0 K [40.0 °Ra]
The system cooling function aims to keep the solar system operational for a longer
time. The function overrides the maximum store temperature to provide thermal
relief of the collector eld and the heat transfer uid on hot days. If the store tem-
perature is higher than the adjusted maximum store temperature and the switch-
on temperature difference DTCO is reached, the solar pump remains switched
on or will be switched on. Solar loading is continued until either the temperature
difference falls below the adjusted value DTCF or the collector limit temperature
is reached. If the system cooling function is active, ⓵and ☼ are displayed (ashing).
DTCF
Switch-off temperature difference
Adjustment range: 0.5 … 29.5 K [1.0 … 59.0 °Ra]
Factory setting: 15.0 K [30.0 °Ra]
Note
This function will only be available, if the collector cooling function
(OCC) is deactivated.

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
Store cooling
OSTC
Store cooling option
Adjustment range: OFF / ON
Factory setting: OFF
OHOL
Holiday cooling option
Adjustment range: OFF / ON
Factory setting: OFF
THOL
Holiday cooling temperature
Adjustment range: 20 … 80 °C [70 … 175 °F]
Factory setting: 40 °C [110 °F]
When the store cooling function is activated, the controller aims to cool down the
store during the night in order to prepare it for solar loading on the following day.
If the adjusted maximum store temperature (S MX) is exceeded and the collector
temperature falls below the store temperature, the system will be reactivated in
order to cool down the store. Cooling will continue until the store temperature has
fallen below the adjusted maximum store temperature (S MX) again.A hysteresis of
2 K [4 °Ra] is set for the store cooling function.
Reference threshold temperature differences for the store cooling function are
DT O and DT F.
If no DHW consumption is expected for a longer period of time, the additional
holiday cooling option OHOL can be activated in order to extend the store cool-
ing function.The adjustable temperature THOL then replaces the maximum store
temperature (S MX) as the switch-off temperature for the store cooling function.
When the holiday cooling function is activated, ☼and ⚠ (ashing) are shown on
the display.
If the holiday cooling function is active, ⓵, ☼and ⚠ are displayed (ashing).
Collector minimum limitation
OCN
Collector minimum limitation option
Adjustment range: OFF / ON
Factory setting: OFF
CMN
Minimum collector temperature
Adjustment range:
10.0 … 90.0 °C [50.0 … 190.0 °F]
Factory setting: 10.0 °C [50.0 °F]
If the collector minimum limitation option is activated, the pump (R1 /R2) will only
be switched on, if the adjustable collector minimum temperature is exceeded.The
minimum temperature prevents the pump from being switched on too often at low
collector temperatures. A hysteresis of 5 K [10 °Ra] is set for this function. If the
collector minimum limitation is active, ❄ is displayed (ashing).
Note
If OSTC or OCF is active, the collector minimum limitation will be over-
ridden. In that case, the collector temperature may fall below CMN.
Antifreeze function
OCF
Antifreeze function option
Adjustment range: OFF / ON
Factory setting: OFF
CFR
Antifreeze temperature
Adjustment range:
-40.0 … +10.0 °C [-40.0 … +50.0 °F]
Factory setting: +4.0 °C [+40.0 °F]
The antifreeze function activates the loading circuit between the collector and the
store when the temperature falls below the adjusted antifreeze temperature.This
will protect the uid against freezing or coagulating. If the adjusted antifreeze tem-
perature is exceeded by 1K [2 °Ra], the loading circuit will be deactivated.
If the antifreeze function is activated, ❄is displayed. If the antifreeze function is
active, ⓵and ❄ are displayed (ashing).

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Installation Indications, functions and options MessagesCommissioningOperation and function
Note
Since this function uses the limited heat quantity of the store, the anti-
freeze function should only be used in regions with few days of tempera-
tures around the freezing point.
The antifreeze function will be suppressed if the store temperature falls
below +5°C [+40 °F] in order to protect the store from frost damage.
Grundfos Direct Sensor™ registration
GFD
Grundfos Direct Sensor™ registration
Selection: OFF, 12, 40, 40F
Factory setting: OFF
Registration of a digital ow rate sensor which can be used for heat quantity meas-
urement.
OFF : no Grundfos Direct Sensor™
12 : VFD 1 - 12 (water / propylene glycol mixture)
40 : VFD 2 - 40
40F : VFD 2 - 40 Fast (water only)
Heat quantity measurement
OHQM
Heat quantity measurement option
Adjustment range: OFF / ON
Factory setting: OFF
If OHQM is activated, the heat quantity gained can be calculated and displayed.
The heat quantity measurement can be carried out in 2 different ways (see below):
with a xed ow rate value or with a VFD Grundfos Direct Sensor™.
Heat quantity measurement with xed ow rate value
The heat quantity balancing (estimation) uses the difference between the ow and
return temperatures and the entered ow rate (at 100 % pump speed).
ÎRead the ow rate (l/min) and adjust it in the FMAX channel.
ÎAdjust the antifreeze type and concentration of the heat transfer uid in the
channels MEDT and MED%.
FMAX
Flow rate in l/min
Adjustment range: 0.5 … 100.0
Factory setting: 6.0
Note:
The FMAX channel will be available only if the SEN channel has been set
to OFF or if no VFD Grundfos Direct Sensor™is activated.
Heat quantity measurement with aVFD Grundfos Direct Sensor™
Heat quantity measurement with a VFD Grundfos Direct Sensor™ is possible in
all system layouts.
In order to use a VFD Grundfos Direct Sensor™ for heat quantity measurement,
proceed as follows:
ÎRegister the VFD Grundfos Direct Sensor™ in the GFD channel.
ÎAdjust the position of the VFD Grundfos Direct Sensor™ in the SEN channel.
ÎAdjust the type and concentration of the heat transfer uid in the channels
MEDT and MED%.