Resol DeltaSol CS/2 User manual

*11204303* 11204303
Thank you for buying this RESOL product.
Read this manual carefully to get the best perfomance from this unit.
Please keep this manual carefully.
DeltaSol®CS/2
www.resol.com
Manual
en
Mounting
Connection
Application examples
Operation
Troubleshooting

2
en
Information about the product
Proper usage
The solar controller is designed for use in solar thermal systems and heating sys-
tems in compliance with the technical data specified in this manual.
Improper use excludes all liability claims.
CE Declaration of conformity
The product complies with the relevant directives and is therefore la-
belled with the CE mark. The Declaration of Conformity is available
upon request, please contact the manufacturer.
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 electromagnetic fields.
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 envi-
ronmentally sound disposal of the devices.
Subject to technical change. Errors excepted.
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!
Target group
These instructions are exclusively addressed to authorised skilled personnel.
Only qualified electricians should carry out electrical works.
Initial installation must be effected by qualified personnel named by the manufac-
turer.
Description of symbols
WARNING! Warnings are indicated with a warning triangle!
ÎThey contain information on how to avoid the dan-
ger 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.
© 20140819_11204303_DeltaSol_CS2.monen.indd

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Contents
1 Installation ........................................................................................... 5
1.1 Mounting ........................................................................................................................5
1.2 Electrical connection ...................................................................................................6
1.3 VFD Grundfos Direct Sensor™...............................................................................7
1.4 PWM output..................................................................................................................7
1.5 Data communication / Bus ..........................................................................................7
1.6 Terminal allocation.......................................................................................................8
2 Operation and function .................................................................... 11
2.1 Push buttons............................................................................................................... 11
2.2 System-Monitoring-Display ..................................................................................... 11
2.3 Flashing codes ............................................................................................................ 12
3 Commissioning.................................................................................. 13
4 Channel overview .............................................................................. 15
4.1 Display channels......................................................................................................... 15
4.2 Adjustment channels ................................................................................................ 17
5 Troubleshooting................................................................................. 27
5.1 Various......................................................................................................................... 28
6 Accessories ........................................................................................ 30

4
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Overview
• System-Monitoring-Display
• Up to 4 Pt1000 temperature sensors
• Semiconductor relays for pump speed control
• 1 input for aVFD Grundfos Direct Sensor™
• Heat quantity measurement
• VBus®
• Function control
• Control of the system by ServiceCenter
software possible
• User-friendly operation
• Housing with outstanding design
• Extra-low power consumption
• HE pump control
• Drainback option
Technical data
Inputs: 4 Pt1000 temperature sensors, 1 VFD Grundfos Direct Sensor™
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
Power consumption: < 1 W (standby)
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 [32 … 104 °F]
Pollution degree: 2
Dimensions: 172 x 110 x 46 mm
110
30
62
172
46
110
30
62
172
46 110
30
62
172
46

5
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1 Installation
1.1 Mounting
The unit must only be installed
• in a dry interior location
• in a non-hazardous location
• away from electromagnetic fields
The controller must additionally be supplied from a double-pole switch with con-
tact gap of at least 3 mm. Route sensor cables and power supply cables separately.
ÎUnscrew the cross-head screw from the cover and remove it along with the
cover from the housing
ÎMark the upper fastening point on the wall and drill
ÎFasten the enclosed wall plug and screw leaving the head protruding
ÎHang the housing from the upper fastening point and mark the lower fastening
point through the hole in the terminal box (centers 130 mm)
ÎDrill and insert the lower wall plug
ÎFasten the housing to the wall with lower fastening screw and tighten
ÎComplete wiring connections in accordance with terminal allocations, see
chap. 2.2 “Electrical connection”
ÎPlace the cover back onto the housing
ÎFasten the cover by means of the cross-head screw
WARNING! Electric shock!
Opening the housing will expose live parts!
ÎSwitch off power supply and disconnect the device
from power supply before opening the housing!
display
cable conduits with strain relief
cover push
button
fuse 2A
130
upper fastening
lower fastening

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1.2 Electrical connection
WARNING! ESD damage!
Electrostatic discharge can lead to damage to electronic com-
ponents!
ÎTake care to discharge properly before touching
the inside of the device.To do so, touch a grounded
surface such as a radiator or tap!
Note:
The minimum pump speed must be set to 100% when auxiliary relays or
valves are connected.
Note:
The mains connection must be carried out with the common ground
of the building to which the pipework of the solar thermal system is
connected.
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
Made in Germany
DeltaSol®CS/2
345678910
PE and load terminals
Connecting the device to the mains supply must always be the last step of the
installation!
The power supply to the controller must be carried out via an external power
switch (last step!).The supply voltage must be 100…240V~ (50 … 60 Hz). Flexible
cables must be attached to the housing with the enclosed strain relief and the
corresponding screws.
The controller is equipped with a semiconductor relay, to which a load such as a
pump, a valve etc. can be connected:
Relay 1
18 = conductor R1
17 = neutral conductor N
13 = protective conductor
The mains supply is to be carried out at the terminals:
19 = neutral conductor N
20 = conductor L
12 = protective conductor ⏚
The temperature sensors (S1 up to S4) are to be connected to the following
terminals with either polarity:
1 / 2 = Sensor 1 (e.g. Sensor collector)
3 / 4 = Sensor 2 (e.g. Sensor store)
5 / 6 = Sensor 3 (e.g. Sensor store top)
7 / 8 = Sensor 4 (e.g. Sensor return)
All Pt1000 temperature sensors are equipped with a platinum measuring element
in their tip.The electrical resistance of the measuring element changes in relation
to the temperature (see table in chap. 5).
The difference between FKP and FRP type sensors only lies in the cable insu-
lation material.The insulation material of FKP type sensor cables resists a higher
temperature, so that FKP type sensors should be used as collector sensors. FRP
type sensors are best used as reference sensors in stores or pipes.
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
Made in Germany
DeltaSol®CS/2
345678910
Sensor terminals S1 … S4
fuse
VBus®power supply
terminals
load terminals
sensor terminals PE terminals
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
Made in Germany
DeltaSol®CS/2
345678910

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1.3 VFD Grundfos Direct Sensor™
The controller is equipped with 1 input for a digitalVFD Grundfos Direct Sensor™
for measuring the flow rate and the temperature. Connection is made at the VFD
terminal (bottom left).
1.4 PWM output
The speed of a HE pump is adjusted through a PWM signal. In addition to con-
nection to the relay, the pump must be connected to the PWM output of the
controller.
Power is supplied to the HE pump by switching the relay on or off.
The two left-hand pins of the connection marked “PWM” are the control output
for a pump with PWM control input.The two right-hand pins are inactive.
1 = PWM output 1, control signal
2 = PWM output 1, GND
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
Made in Germany
DeltaSol®CS/2
345678910
1.5 Data communication / Bus
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
Made in Germany
DeltaSol®CS/2
345678910
VBus®
connection terminals
The controller is equipped with a RESOL VBus®for data transfer with and energy
supply to external modules.The connection is carried out at the terminals marked
“VBus” (either polarity). One or more RESOL VBus®modules can be connected
via this data bus, such as
• GA3 Large Display, SD3 Smart Display
• DL3 Datalogger
• DL2 Datalogger
• VBus®/USB or VBus®/LAN interface adapter
• AM1 Alarm Module
• WMZ calorimeter module
By means of a Datalogger or an interface adapter, the controller can be connected
to a PC or a computer network. Different solutions for visualisation and remote
parameterisation are availabe on the RESOL website www.resol.com.

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1.6 Terminal allocation
910
VBus
PWM
VFD
S1
S2
S4 / VFD / TR
S4 / VFD / TFL
R1 S3 /TSTT
S1
S3
S2
R1
exemplary
Drainback system layout
System layout 1
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 operated by relay
1, and the store will be loaded until the switch-off temperature difference (DTF)
or the maximum store temperature (S MX) is reached.
Sensors S3 and S4 can optionally be connected for measurement purposes. S3 can
optionally be used as reference sensor for the store emergency shutdown option
(OSEM).
If heat quantity measurement (OHQM) is activated, S4 andVFD are to be connect-
ed as flow and return sensors respectively.

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Display Channels
Channel Description Terminal Page
INIT x* ODB initialisation active - 15
FLL x* ODB filling time active - 15
STAB x* ODB stabilisation in progress - 15
COL x Temperature collector S1 15
TST x Temperature store S2 15
S3 x Temperature sensor 3 S3 15
TSTT x* Temperatur store at the top S3 15
S4 x Temperature sensor 4 S4 15
TFL x* Temperature flow sensor S1 / S4 /VFD 15
TR x* Temperature return sensor S4 /VFD 15
VFD x* Temperature Grundfos Direct Sensor™ VFD 15
L/h x* Flow rate Grundfos Direct Sensor™ VFD 16
n % x Pump speed R1 R1 16
hP x Operating hours R1 R1 17
kWh x* Heat quantity kWh - 16
MWh x* Heat quantity MWh - 16
TIME x Time - 16
Adjustment Channels
Channel Description Factory setting Page
DT O x Switch-on temperature difference 6.0 K [12.0 °Ra] 17
DT F x Switch-off temperature difference 4.0 K [8.0 °Ra] 17
DT S x Nominal temperature difference 10.0 K [20.0 °Ra] 17
PUM x Pump control type PSOL 18
RIS x Rise control R1 2 K [4 °Ra] 18
nMX x Maximum pump speed 100 % 18
nMN x Minimum pump speed 30 % 18
S MX x Maximum store temperature 60 °C [140 °F] 19
OSEM x Option store emergency shutdown OFF 19
EM x Emergency temperature collector 130 °C [270 °F] 19
Emergency temperature collector if ODB is activated: 95 °C [200 °F] 19
OCC x Option collector cooling OFF 20
CMX x* Maximum collector temperature 110 °C [230 °F] 20
OSYC x Option system cooling OFF 20
DTCO x* Cooling switch-on temperature difference 20.0 K [40.0 °Ra] 20
DTCF x* Cooling switch-off temperature difference 15.0 K [30.0 °Ra] 20
OSTC x Option store cooling OFF 20

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Legend:
Symbol Specification
x Channel is available
x* Channel is available if the corresponding option is activated.
s Channel is specifically available in this system layout
Adjustment Channels
Channel Description Factory setting Page
OHOL x* Option holiday cooling OFF 20
THOL x* Holiday cooling temperature 40 °C [110 °F] 22
OCN x Option minimum limitation OFF 22
CMN x* Minimum collector temperature 10 °C [50 °F] 22
OCF x Option antifreeze OFF 22
CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 22
GFD x Grundfos Direct Sensor™ OFF <?>
OHQM x Option heat quantity measurement OFF 24
SEN x* VFD allocation 2 24
FMAX x* Maximum flow 6.0 l/min 24
MEDT x* Antifreeze type 1 24
MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene) 45 % 24
ODB x Drainback option OFF 25
tDTO x* ODB switch-on condition - time period 60 s 25
tFLL x* ODB filling time 5.0 min 25
tSTB x* ODB stabilisation time 2.0 min 25
MAN x Manual operation R1 Auto 25
LANG x Language En 25
UNIT x Temperature unit °C 25
RESE x Reset - back to factory settings 25
######## Version number

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2 Operation and function
2.1 Push buttons
1
3
2backward (-)
forward (+)
SET (selection / ad-
justment mode)
The controller is operated via three push buttons below the display.
Button 1 is used for scrolling forward through the indication menu or to increase
the adjustment values. Button 2 is used for scrolling backward and reducing val-
ues. Button 3 is used for selecting channels and confirming adjustments.
During normal operation, only the display channels are shown.
ÎScroll through the display channels by pressing buttons 1 and 2
Accessing the adjustment channels:
ÎScroll down in the display menu and press button 1 for approx. two seconds
after you have reached the last display item.
When an adjustment value is shown on the display, Ⓢis indicated to the
right of the channel name.
ÎPress button 3 in order to access the adjustment mode Ⓢstarts flashing.
ÎAdjust the value using buttons 1 and 2
ÎBriefly press button 3, Ⓢ permanently appears,the adjusted value will be
saved.
2.2 System-Monitoring-Display
System-Monitoring-Display
The System-Monitoring-Display consists of three blocks: channel display, tool
bar and system screen.
channel display
The system monitoring display consists of three blocks: channel display, tool
bar and system screen.
The channel display consists of two lines. The upper line is an alpha-numeric
16-segment display (text display) for displaying channel names and menu items. In
the lower 7-segment display, the channel values and the adjustment parameters
are displayed.Temperatures are either indicated in °C or °F, whereas temperature
differences are indicated in K or °Ra respectively.
tool bar
The additional symbols of the tool bar indicate the current system status.
Status normal blinkend
relay 1 active ⓵
maximum store temperature exceeded ☼
store emergency shutdown active ⚠+ ☼
collector emergency shutdown active ⚠
collector cooling active ⓵ ☼
system cooling active ⓵ ☼
store cooling active ⓵+ ☼
holiday cooling function activated ☼ ⚠
holiday cooling function active ⓵+ ☼ ⚠
collector minimum limitation active ❄
antifreeze function activated ❄
antifreeze function active ⓵ ❄
manual operation relay 1 ON ☛+ ⓵ ⚠
manual operation relay 1 OFF ☛ ⚠
sensor defective ☍ ⚠

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System screen
System-Screen
The system screen (active system layout) shows the system selected on the con-
troller. It consists of several system component symbols, which are – depending on
the current status of the system – either flashing, permanently shown or hidden.
2.3 Flashing codes
System screen flashing codes
• Pumps are flashing when the corresponding relay is switched on
• Sensor symbols are flashing if the corresponding sensor display channel is
selected
• Sensors are flashing quickly in the case of a sensor fault
• Burner symbol is flashing if the afterheating is active
Pump
Stores 1 and 2
with heat exchanger
Temperature sensor
Collectors
with collector sensor
collector
sensor
collector
pump
storestore heat exchanger
store sensor
at the top
store sensor at the base

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3 Commissioning
1
3
2backward (-)
forward (+)
SET (selection /
adjustment mode)
The three push buttons of the CS/2 controller
ÎEstablish the power supply
The controller runs an initialisation phase.
When the controller is commissioned for the first time or after a reset, it will run
a commissioning menu.The commissioning menu leads the user through the most
important adjustment channels needed for operating the system.
Operating the commissioning menu:
ÎEnter the channel by pressing button 3
The Ⓢsymbol flashes.
ÎAdjust the value by pressing buttons 1 and 2
ÎSave the adjustment by pressing button 3 again
The Ⓢsymbol stops flashing.
ÎPress button 1 or 2 to switch to the next or previous channel
The commissioning menu consists of the following channels:
LANG:
Language selection
Selection: dE, En, Fr, ES, It
Factory setting: En
1. Language
ÎAdjust the desired menu language in this channel
• dE : German
• En : English
• Fr : French
• ES : Spanish
• It : Italian
UNIT:
Temperature unit selection
Selection: °C, °F
Factory setting: °C
2. Unit
ÎAdjust the unit in which temperatures and temperature differences shall be
displayed
S MX
Maximum store temp.
Adjustment range: 4 … 95 °C [40 … 200 °F]
Arr 10: 4 … 90 °C [40 … 190 °F]
Factory setting: 60 °C [140 °F]
3. Maximum store temperature
ÎAdjust the desired maximum store temperature
Note:
The controller is also equipped with a non-adjustable emergency shut-
down function,which will shut the system down if the store reaches 95 °C
[200 °F].

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PUM
Pump control type
Selection: OnOF, PULS, PSOL, PHEA
Factory setting: PSOL
4. Pump control type
ÎAdjust the pump control type.
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 (pulse packet control via semiconductor relay)
Adjustment for high efficiency pump (HE pump)
• PSOL (PWM profile for a high-efficiency solar pump)
• PHEA (PWM profile for a high-efficiency heating pump)
In order to reduce the number of switching processes for high-efficiency pumps,
the controller is equipped with a relay overrun function that automatically comes
into effect when the speed control signal is not issued by the relay itself (PUM =
PSOL or PHEA).The corresponding relay will then remain switched on for an hour
after the switch-off conditions are fulfilled.
WARNING! Electric shock!
During the overrun time, the relay symbol disappears from the
display and the pump is inactive, but the relay is still energised!
ÎSwitch off power supply and disconnect the device
from power supply before working on the device or
the cables connected!
nMN
Minimum pump speed
Adjustment range: (10) 30 … 100 %
Factory setting: 30 %
5. Minimum pump speed
ÎAdjust a minimum speed for the pump
Note:
If loads which are not speed-controlled (e.g. valves) are used, the value
must be set to 100%.
nMX
Maximum pump speed
Adjustment range: (10) 30 … 100 %
Factory setting: 100 %
6. Maximum pump speed
ÎAdjust the maximum pump speed for the corresponding pumps.
Note:
When loads which are not speed-controlled (e. g. valves) are used, the
value must be set to 100% or the pump control type must be set to OnOF
in order to deactivate pump speed control.
Confirmation enquiry
Completing the commissioning menu
After the last channel of the commissioning menu has been adjusted and con-
firmed, the controller asks for confirmation of the adjustments.
ÎTo confirm the adjustments made in the commissioning menu, press button 3
Now the controller is ready for operation with typical settings to suit the selected
system layout.
The settings made in the commissioning menu can be changed later on in the cor-
responding adjustment channels.Additional functions and options can of course be
individually adjusted as well (see chap. 4.2).

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4 Channel overview
4.1 Display channels
Note:
The displayed values and adjustment channels depend on which options
and functions have been selected. Only values and adjustment channels
available for the individual settings selected will appear in the menu.
Indication of drainback time periods
Initialisation
INIT
ODB initialisation active
Indicates the time adjusted in tDTO, running backwards.
Filling time
FLL
ODB filling time active
Indicates the time adjusted in tFLL, running backwards.
Stabilisation
STAB
Stabilisation
Indicates the time adjusted in tSTB, running backwards.
Indication of collector temperature
COL
Collector temperature
Display range: -40 … +260 °C [-40 … +500 °F]
Indicates the current collector temperature.
Indication of store temperatures
TST,TSTT
Store temperatures
Display range: -40 … +260 °C [-40 … +500 °F]
Indicates the current store temperature.
• TST : store temperature
• TSTT : store temperature top
(Arr= 2 only; replaces TSTT if, during thermal disinfection,the heating period DDIS
is active)

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Indication of sensors 3, 4 and VFD
S3, S4,VFD
Sensor temperatures
Display range: -40 … +260 °C [-40 … +500 °F]
VFD: 0 … 100 °C [32 … 212 °F]
Indicates the current temperature of the corresponding additional sensor (without
control function).
• S3 : temperature at sensor 3
• S4 : temperature at sensor 4
• VFD : temperature at the Grundfos Direct Sensor™
Note:
S3 and S4 will only be indicated if the temperature sensors are connected.
VFD will be indicated only if a Grundfos Direct Sensor™ has been con-
nected and registered.
Indication of other temperatures
TFL,TR
Other measured temperatures
Display range: -40 … +260 °C [-40 … +500 °F]
Indicates the current temperature of the corresponding sensor.
• TFL : temperature flow
• TR : temperature return
Note:
TFL / TR will be indicated only if the heat quantity measurement option
(OHQM) has been activated.
Indication of flow rate
l/h
Flow rate
Display range: depends on the sensor type
Indicates the current flow rate at the VFD flow rate sensor.
The display range depends on the sensor type selected.
Indication 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.
Heat quantity measurement can be run in 2 different ways (see QV auf S. 57):with a
fixed flow 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 0.As soon as one of the display
channels of the heat quantity is selected, the Ⓢsymbol is permanently shown
on the display.
ÎPress button 3 for 2s in order to access the RESET mode of the counter.

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The display symbol Ⓢwill flash and the heat quantity value will be set to 0.
ÎConfirm the reset with button 3 in order to finish the reset.
In order to interrupt the RESET-process, do not press a button for about 5s.The
display returns to the display mode.
Operating hours counter
h P
Operating hours counter
Display channel
The operating hours counter accumulates the solar operating hours of the relay
(h P). Full hours are displayed.
The accumulated operating hours can be set back to zero.As soon as one operat-
ing hours channel is selected, the symbol Ⓢis displayed.
ÎIn order to access the RESET-mode of the counter, press button 3 for approx.
two seconds.
The display symbol Ⓢwill flash and the operating hours will be set to 0.
ÎConfirm the reset with button 3 in order to finish the reset.
In order to interrupt the RESET-process, do not press a button for about 5s.The
display returns to the display mode.
4.2 Adjustment channels
∆T control
DT O
Switch-on temperature diff.
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 switch-on dif-
ference is reached, the pump is activated. When the temperature difference 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] high-
er than the switch-off temperature difference.
DT F
Switch-off temperature diff.
Adjustment range: 0.5 … 19.5 K [1.0 … 39.0°Ra]
Factory setting: 4.0 K [8.0°Ra]
Note:
When the drainback option ODB is activated, the temperature differenc-
es DT O, DT F and DT S are set to a fixed adjustment:
DT O = 10 K [20 °Ra]
DT F = 4 K [8 °Ra]
DT S = 15 K [30 °Ra]
Previous adjustments made in these channels will be overridden and may
have to be entered again if ODB is deactivated later on.

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Pump speed control
DT S
Nominal 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 operation mode of the relay must be set to
Auto (adjustment channel MAN)
When the switch-on temperature difference is reached, the pump is activated at
full speed for 10 seconds.Then, the speed is reduced to the minimum pump speed
value (factory setting = 30 %).
If the temperature difference reaches the adjusted nominal temperature differ-
ence, the pump speed increases by one step (10%). If the difference increases by
the adjustable rise value, the pump speed increases by 10% respectively until the
maximum pump speed of 100% is reached.The response of the controller can be
adapted via the parameter “Rise”.
Note:
The nominal 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 (pulse packet control via semiconductor relay)
Adjustment for high efficiency pump (HE pump)
• PSOL (PWM profile for a high-efficiency solar pump)
• PHEA (PWM profile for a high-efficiency heating pump)
In order to reduce the number of switching processes for high-efficiency pumps,
the controller is equipped with a relay overrun function that automatically comes
into effect when the speed control signal is not issued by the relay itself (PUM =
PSOL or PHEA).The corresponding relay will then remain switched on for an hour
after the switch-off conditions are fulfilled.
WARNING! Electric shock!
During the overrun time, the relay symbol disappears from the
display and the pump is inactive, but the relay is still energised!
ÎSwitch off power supply and disconnect the device
from power supply before working on the device or
the cables connected!

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Minimum pump speed
nMN
Minimum pump speed
Adjustment range: (10) 30 … 100 %
Factory setting: 30 %
A relative minimum pump speed can be allocated to the output R1 via the adjust-
ment channel nMN.
Note:
When loads which are not speed-controlled (e.g. valves) are used, the
value must be set to 100% in order to deactivate pump speed control.
nMX
Maximum pump speed
Adjustment range: (10) 30 … 100 %
Factory setting: 100 %
A relative maximum pump speed can be allocated to the output R1 via the adjust-
ment channel nMX.
Note:
When loads which are not speed-controlled (e. g. valves) are used, the
value of the relay must be set to 100% or the pump control type must be
set to OnOF in order to deactivate pump speed control.
Maximum store temperature
S MX
Maximum store temp.
Adjustment range: 4 … 95 °C [40 … 200 °F]
Arr 3: 4 … 90 °C [40 … 190 °F]
Factory setting: 60 °C [140 °F]
Once the adjusted maximum temperature is exceeded,the solar pump is switched
off and further loading of the store is prevented to reduce scald risk or system
damage. A fixed hysteresis of 2 K [4 °Ra] is set for the maximum store tempera-
ture.
When the temperature at the corresponding sensor exceeds the adjusted maxi-
mum store temperature, the ☼symbol is shown on the display.
Note:
If the collector cooling or the system cooling function is activated, the ad-
justed store temperature may be overridden. In order to prevent system
damage, the controller is also equipped with an integrated store emergen-
cy shutdown if the store reaches 95 °C [200 °F].
Store emergency shutdown option
OSEM
Store emergency shutdown option
Adjustment range: OFF / ON
Factory setting: OFF
This option is used for activating the integrated store emergency shutdown for
an upper store sensor. If the temperature at the reference sensor exceeds 95 °C
[200 °F], the store will be blocked and loading will be stopped until the tempera-
ture falls below 90°C [190 °F]
Note:
Sensor S3 ist used as the reference sensor.

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Collector temperature limitation
Emergency shutdown of the collector
EM
Collector temperature limitation
Adjustment range: 80 … 200 °C [170 … 390 °F]
Factory setting: 130 °C [270 °F]
If the adjusted collector emergency shutdown temperature (EM) is exceeded, the
controller switches off the solar pump (R1) in order to protect the system against
overheating (collector emergency shutdown). A hysteresis of 10 K [20 °Ra] is set
for the collector temperature limitation.While the collector is in emergency shut-
down, ⚠(flashing) is shown on the display.
Note:
If the drainback option ODB is activated, the adjustment range of EM is
changed to 80 … 120 °C [170 … 250 °F]. The factory setting in that case
is 95 °C [200 °F].
WARNING!
Danger of injury and system damage through pressure
surges!
If water is used as a heat transfer medium in a pressure-less system,
the water will start boiling at 100 °C [212°F].
ÎIf a pressure-less drainback system is used with water
as a heat transfer medium, do not adjust the collec-
tor temperature limitation EM to more than 95 °C
[200 °F]!
Cooling functions
In the following the three 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 function
OCC
Option collector cooling
Adjustment range: OFF / ON
Factory setting: OFF
CMX
Maximum collector temp.
Adjustment range: 70 … 160 °C [150 … 320 °F]
Factory setting: 110 °C [230 °F]
When the collector cooling function is activated, the controller aims to keep the
collector at an operational temperature.
When the adjusted maximum store temperature is reached, solar loading stops. If
the collector temperature increases to the adjusted maximum collector temper-
ature, the solar pump is activated until the collector temperature falls at least 5 K
[10 °Ra] below the maximum collector temperature.The store temperature may
increase (subordinate active maximum store temperature), but only up to 95 °C
[200 °F] (emergency shutdown of the store).
If the collector cooling function is active, ⓵and ☼(flashing) is shown on the
display.
Note:
This function will only be available if the system cooling function (OSYC)
is deactivated.
Note:
In system layout 3, the parameter CMX is available without the OCC
function. In system layout 3, CMX is used to set the activation tempera-
ture for the heat dump function. No other switch-on condition is needed
in that case.