Resol DeltaSol CS/4 User manual

*11204293* 11204293
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.
DeltaSol®CS/4
Manual
www.resol.com
en
Solar controller
Manual for the
specialised craftsman
Installation
Operation
Functions and options
Troubleshooting
Version 1.11

2
en
© 20180904_11204293_DeltaSol_CS4.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.
• At the end of its working life,the product must not be disposed of as urban waste.
Old appliances must be disposed of by an authorised body in an environmentally
sound manner. Upon request we will take back your old appliances bought from
us and guarantee an environmentally sound disposal of the devices.

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Contents
1 Overview .............................................................................................. 4
2 Installation ........................................................................................... 5
2.1 Mounting ........................................................................................................................5
2.2 Electrical connection ...................................................................................................6
2.3 VFD Grundfos Direct Sensor™...............................................................................7
2.4 PWM output..................................................................................................................7
2.5 Data communication / Bus ..........................................................................................7
2.6 System overview...........................................................................................................7
2.7 Systems...........................................................................................................................8
3 Operation and function .................................................................... 19
3.1 Buttons ........................................................................................................................ 19
4 System-Monitoring-Display .............................................................. 19
4.1 Flashing codes ............................................................................................................ 20
Solar controller DeltaSol®CS/4
The DeltaSol®CS/4 controller is used for 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.................................................................................. 21
6 Channel overview .............................................................................. 23
6.1 Display channels......................................................................................................... 23
6.2 Adjustment channels ................................................................................................ 26
7 Troubleshooting................................................................................. 36
8 Accessories ........................................................................................ 39
8.1 Sensors and measuring instruments ..................................................................... 40
8.2 VBus®accessories ..................................................................................................... 40
8.3 Interface adapters...................................................................................................... 40
9 Index ................................................................................................... 41

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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 relays for pump speed control
• HE pump control
• Heat quantity measurement
• Commissioning menu
• 3 basic systems to choose from
• Function control
• Optional thermal disinfection function
• Drainback option
• Unit °F and °C selectable
Technical data
Inputs: 4 Pt1000 temperature sensors, 1 VFD Grundfos Direct SensorTM
Outputs: 2 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: 2 A 240 V~
Power supply: 100 … 240 V~ (50 … 60 Hz)
Supply connection: type Y attachment
Standby: 0.60 W
Temperature controls class: I
Energyefciencycontribution:1 %
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, tube collector function,
thermostat function, speed control 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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5
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

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Installation Indications, functions and options MessagesCommissioningOperation and function
Seriennummer 1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
LN
R1
N
2019
18
171615
14131212
NR2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM
VFD
Made in Germany
DeltaSol®CS/4 Musterregler
345678910
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 com-
ponents!
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.
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! Fuse
VBus®mains
terminals
load
terminals
sensor terminals protective earth
conductor terminal
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 2 semiconductor relays to which loads such as
pumps, valves, etc. can be connected:
Relay 1 Relay 2
18 = Conductor R1 16 = Conductor R2
17 = Neutral conductor N 15 = Neutral conductor N
13 = Protective earth conductorr ⏚14 = Protective earth conductorr ⏚
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 1)
3 / 4 = Sensor 2 (e. g. store sensor 1)
5 / 6 = Sensor 3 (e. g. store sensor top)
7 / 8 = Sensor 4 (e. g. return sensor)

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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 input.The two pins on the right-hand side are not
used.
2
1
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
LN
R1
N
2019
18
17161514131212
NR2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
S2S1 S3 S4 VBus
PWM
VFD
Made in Germany
DeltaSol®CS/4
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 39.
1
Standard solar system (page 8)
2
Solar system with backup heating
(page 11)
3
Standard solar system with heat dump
(page 16)
2.6 System overview

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Installation Indications, functions and options MessagesCommissioningOperation and function
2.7 Systems
S1
S3
S2
R1 R2
exemplary
drainback system layout
(with booster pump)
Arrangement 1: Standard solar system
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 is used as the return sensor.
If the drainback option (ODB) is activated, relay 2 can be used for activating a
booster pump. For this purpose, the booster function (OBST) has to be activated.
910
VBus
PWM 1/2
VFD
S1
S2
S4 / VFD / TR
S4 / VFD / TFL
R1 S3 / TSTT

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
Display channels
Channel Description Connection terminal Page
INIT x* ODB initialisation active - 23
FLL x* ODB lling time active - 23
STAB x* ODB stabilisation in progress - 23
COL x Temperature collector S1 24
TST x Temperature store S2 24
S3 x Temperature sensor 3 S3 24
TSTT x* Temperature store top S3 24
S4 x Temperature sensor 4 S4 24
TFL x* Temperature ow sensor S1 / S4 / VFD 24
TR x* Temperature return sensor S4 / VFD 24
VFD x* Temperature Grundfos Direct Sensor™ VFD 24
L/h x* Flow rate Grundfos Direct Sensor™ VFD 25
n % x Speed R1 R1 25
hP x Operating hours R1 R1 26
hP1 x* Operating hours R1 (if OBST is activated) R1 26
hP2 x* Operating hours R2 (if OBST is activated) R2 26
kWh x* Heat quantity in kWh - 25
MWh x* Heat quantity in MWh - 25
TIME x Time - 26
Adjustment channels
Channel Description Factory setting Page
Arr x System 1 26
DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra] 27
DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra] 27
DT S x Set temperature difference R1 10.0 K [20.0 °Ra] 27
RIS x Rise R1 2 K [4 °Ra] 27
PUM1 x Pump control type R1 PSOL 28
nMN x Minimum speed R1 30 % 28
nMX x Maximum speed R1 100 % 28
S MX x Maximum store temperature 60 °C [140 °F] 28
OSEM x Store emergency shutdown option OFF 29
EM x Collector emergency temperature 130 °C [270 °F] 29
Collector emergency temperature if ODB is activated: 95 °C [200 °F] 29
OCC x Collector cooling option OFF 29
CMX x* Maximum collector temperature 110 °C [230 °F] 29
OSYC x System cooling option OFF 30

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Installation Indications, functions and options MessagesCommissioningOperation and function
Adjustment channels
Channel Description Factory setting Page
DTCO x* Switch-on temperature difference cooling 20.0 K [40.0 °Ra] 30
DTCF x* Switch-off temperature difference cooling 15.0 K [30.0 °Ra] 30
OSTC x Store cooling option OFF 30
OHOL x* Holiday cooling option OFF 30
THOL x* Holiday cooling temperature 40 °C [110 °F] 30
OCN x Collector minimum limitation option OFF 31
CMN x* Collector minimum temperature 10 °C [50 °F] 31
OCF x Antifreeze option OFF 31
CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 31
OTC x Tube collector option OFF 31
TCST x* OTC starting time 07:00 31
TCEN x* OTC ending time 19:00 31
TCRU x* OTC runtime 30 s 31
TCIN x* OTC standstill interval 30 min 32
GFD x Grundfos Direct Sensor™ OFF 32
OHQM x Heat quantity measurement option OFF 32
SEN x* VFD allocation 2 33
FMAX x* Maximum ow rate 6.0 l/min 32
MEDT x* Antifreeze type 1 33
MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene glycol) 45 % 33
ODB x Drainback option OFF 33
tDTO x* ODB switch-on condition - time period 60 s 34
tFLL x* ODB lling time 5.0 min 34
tSTB x* ODB stabilisation time 2.0 min 34
OBST s* Option booster function OFF 34
MAN1 x Manual mode R1 Auto 34
MAN2 x Manual mode R2 Auto 34
LANG x Language dE 35
UNIT x Temperature unit °C 35
RESE x Reset - back to factory settings 35
######## Version number
Legend:
Symbol Description
x Channel is available
x* Channel is available, if the corresponding option is activated.
s* System-specic channel, only available if the corresponding option is activated

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
Arrangement 2: Solar system with backup heating
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.
Sensor S3 is used for a thermostat function, which operates relay 2 for backup
heating or heat dump purposes, when the adjusted thermostat switch-on tempera-
ture (AH O) is reached.This function can optionally be combined with up to three
adjustable time frames.
Sensor S3 can optionally be used as the reference sensor for the thermal disinfec-
tion function (OTD) or the store emergency shutdown option (OSEM).
Sensor S4 can optionally be connected. If heat quantity measurement (OHQM) is
activated, S4 and VFD are used as the ow and return sensors respectively.
VBus
910
PWM 1/2
VFD
R2
S1
S2
R1
S3 / TSTT
S4 / VFD / TR
S4 / VFD / TFL

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Installation Indications, functions and options MessagesCommissioningOperation and function
Display channels
Channel Description Connection terminal Page
INIT x* ODB initialisation active - 23
FLL x* ODB lling time active - 23
STAB x* ODB stabilisation in progress - 23
COL x Temperature collector S1 24
TSTB x Temperature store 1 base S2 24
TSTT x Temperature store 1 top S3 24
TDIS s* Thermal disinfection temperature (thermal disinfection) S3 24
S4 x Temperature sensor 4 S4 24
TFL x* Temperature ow sensor S1 / S4 / VFD 24
TR x* Temperature return sensor S4 / VFD 24
VFD x* Temperature Grundfos Direct Sensor™ VFD 24
L/h x* Flow rate Grundfos Direct Sensor™ VFD 25
n1 % x Speed R1 R1 25
h P1 x Operating hours R1 R1 26
h P2 x Operating hours R2 R2 26
kWh x* Heat quantity in kWh - 25
MWh x* Heat quantity in MWh - 25
CDIS s* Countdown of monitoring period (thermal disinfection) - 25
SDIS s* Starting time display (thermal disinfection) - 25
DDIS s* Heating period display (thermal disinfection) - 25
TIME x Time - 26
Adjustment channels
Channel Description Factory setting Page
Arr x System 2 26
DT O x Switch-on temperature difference R1 6.0 K [12.0 °Ra] 27
DT F x Switch-off temperature difference R1 4.0 K [8.0 °Ra] 27
DT S x Set temperature difference R1 10.0 K [20.0 °Ra] 27
RIS x Rise R1 2 K [4 °Ra] 27
PUM1 x Pump control type R1 PSOL 28
n1MN x Minimum speed R1 30 % 28
n1MX x Maximum speed R1 100 % 28
S MX x Maximum store temperature 60 °C [140 °F] 28
OSEM x Store emergency shutdown option OFF 29
EM x Collector emergency temperature 130 °C [270 °F] 29
Collector emergency temperature if ODB is activated: 95 °C [200 °F] 29
OCC x Collector cooling option OFF 29
CMX x* Maximum collector temperature 110 °C [230 °F] 29
OSYC x System cooling option OFF 30
DTCO x* Switch-on temperature difference cooling 20.0 K [40.0 °Ra] 30
DTCF x* Switch-off temperature difference cooling 15.0 K [30.0 °Ra] 30
OSTC x Store cooling option OFF 30
OHOL x* Holiday cooling option OFF 30
THOL x* Holiday cooling temperature 40 °C [110 °F] 30

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
Adjustment channels
Channel Description Factory setting Page
OCN x Collector minimum limitation option OFF 31
CMN x* Collector minimum temperature 10 °C [50 °F] 31
OCF x Antifreeze option OFF 31
CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 31
OTC x Tube collector option OFF 31
TCST x* OTC starting time 07:00 31
TCEN x* OTC ending time 19:00 31
TCRU x* OTC runtime 30 s 31
TCIN x* OTC standstill interval 30 min 32
GFD x Grundfos Direct Sensor™ OFF 32
OHQM x Heat quantity measurement option OFF 32
SEN x* VFD allocation 2 33
FMAX x* Maximum ow rate 6.0 l/min 32
MEDT x* Antifreeze type 1 33
MED% x* Antifreeze concentration 45 % 33
AH O s Switch-on temperature for thermostat 40 °C [110 °F] 14
AH F s Switch-off temperature for thermostat 45 °C [120 °F] 14
t1 O s Thermostat switch-on time 1 00:00 14
t1 F s Thermostat switch-off time 1 00:00 14
t2 O s Thermostat switch-on time 2 00:00 14
t2 F s Thermostat switch-off time 2 00:00 14
t3 O s Thermostat switch-on time 3 00:00 14
t3 F s Thermostat switch-off time 3 00:00 14
ODB x Drainback option OFF 33
tDTO x* ODB switch-on condition - time period 60 s 34
tFLL x* ODB lling time 5.0 min 34
tSTB x* ODB stabilisation time 2.0 min 34
OTD s Thermal disinfection option OFF 15
PDIS s* Monitoring period 01:00 15
DDIS s* Heating period 01:00 15
TDIS s* Disinfection temperature 60 °C [140 °F] 15
SDIS s* Starting time 00:00 15
MAN1 x Manual mode R1 Auto 34
MAN2 x Manual mode R2 Auto 34
LANG x Language dE 35
UNIT x Temperature unit °C 35
RESE x Reset - back to factory settings 35
######## Version number
Legend:
Symbol Description
x Channel is available
x* Channel is available, if the corresponding option is activated.
sSystem-specic channel
s* System-specic channel, only available if the corresponding option is activated

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Installation Indications, functions and options MessagesCommissioningOperation and function
System-specicfunctions
The following adjustments are used for the specic functions in system 3. The chan-
nels described are not available in any other systems.
Thermostat function
Backup
heating
Use of surplus
energy
The thermostat function works independently from the solar operation and can be
used for using surplus energy or for backup heating.
• AH O < AH F
thermostat function for backup heating
• AH O > AH F
thermostat function for using surplus energy
The symbol ⓶will be shown on the display, if the second relay output is activated.
S3 is used as the reference sensor for the thermostat function.
AH O
Thermostat switch-on temperature
Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F]
Factory setting: 40.0 °C [110.0°F]
AH F
Thermostat switch-off temperature
Adjustment range: 0.0 … 95.0 °C [30.0 … 200.0 °F]
Factory setting: 45.0 °C [120.0 °F]
t1 O, t2 O, t3 O
Thermostat switch-on time
Adjustment range: 00:00 … 23:45
Factory setting: 00:00
t1 F, t2 F, t3 F
Thermostat switch-off time
Adjustment range: 00:00 … 23:45
Factory setting: 00:00
In order to block the thermostat function for a certain period, there are 3 time
frames t1 … t3.
If the thermostat function is supposed to run from 06:00 a.m. to 09:00 a.m. only,
adjust t1 O to 06:00 a.m. and t1 F to 09:00 a.m.
If the switch-on and switch-off times of a time frame are set to an identical value,
the time frame will be inactive. If all time frames are set to 00:00, the thermostat
function is solely temperature dependent (factory setting).

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
Thermal disinfection of the upper DHW zone
OTD
Therm. disinfection function
Adjustment range: OFF / ON
Factory setting: OFF
PDIS
Monitoring period
Adjustment range: 0 … 30:0 … 24 h (dd:hh)
Factory setting: 01:00
DDIS
Heating period
Adjustment range: 0:00 … 23:59 (hh:mm)
Factory setting: 01:00
TDIS
Disinfection temperature
Adjustment range: 0 … 95 °C [30 … 200 °F]
Factory setting: 60 °C [140 °F]
This function helps to contain the spread of Legionella in DHW stores by system-
atically activating the backup heating.
For thermal disinfection, the temperature at the reference sensor will be moni-
tored. Protection is ensured when, during the monitoring period, the disinfection
temperature is continuously exceeded for the entire disinfection period.
The monitoring period starts as soon as the temperature at the reference sensor
falls below the disinfection temperature. When the monitoring period ends, the
allocated reference relay activates the backup heating.The disinfection period starts,
if the temperature at the allocated sensor exceeds the disinfection temperature.
Thermal disinfection can only be completed when the disinfection temperature
is exceeded for the duration of the disinfection period without any interruption.
Starting time delay
SDIS
Starting time
Adjustment range: 0:00 … 24:00 (time)
Factory setting: 00:00
If the starting delay option is activated, a starting time for the thermal disinfection
with starting delay can be adjusted. The activation of the backup heating is then
delayed until that starting time after the monitoring period has ended.
If the monitoring period ends, for example, at 12:00 o'clock, and the starting time
has been set to 18:00, the reference relay will be energised with a delay of 6 hours
at 18:00 instead of 12:00 o'clock.
Note
If the thermal disinfection option is activated, the display channels TDIS,
CDIS, SDIS and DDIS will be displayed.

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Installation Indications, functions and options MessagesCommissioningOperation and function
Arrangement 3: Standard solar system with heat dump
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.
If the collector maximum temperature (CMX) is reached, the solar pump will be
activated by R1 and the 3-port valve by R2 in order to divert excess heat to a heat
sink. For safety reasons, excess heat dump will only take place as long as the store
temperature is below the non-adjustable shutdown temperature of 95 °C [200 °F].
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 respectively.
VBus
10
9
PWM 1/2
VFD
S1
S2
S4 / VFD / TR
S4 / VFD / TFL
R1
R2
S3 /TSTT

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InstallationIndications, functions and optionsMessages Commissioning Operation and function
Display channels
Channel Description Connection terminal Page
COL x Temperature collector S1 24
TST x Temperature store S2 24
S3 x Temperature sensor 3 S3 24
TSTT x* Temperature store top S3 24
S4 x Temperature sensor 4 S4 24
TFL x* Temperature ow sensor S1 / S4 / VFD 24
TR x* Temperature return sensor S4 / VFD 24
VFD x* Temperature Grundfos Direct Sensor™ VFD 24
L/h x* Flow rate Grundfos Direct Sensor™ VFD 25
n % x Speed relay R1 R1 25
h P1 x Operating hours R1 R1 26
h P2 x Operating hours R2 R2 26
kWh x* Heat quantity in kWh - 25
MWh x* Heat quantity in MWh - 25
TIME x Time - 26
Adjustment channels
Channel Description Factory setting Page
Arr x System 3 26
DT O x Switch-on temperature difference R1 6.0 K [12.0°Ra] 27
DT F x Switch-off temperature difference R1 4.0 K [8.0°Ra] 27
DT S x Set temperature difference R1 10.0 K [20.0°Ra] 27
RIS x Rise R1 2 K [4 °Ra] 27
PUM1 x Pump control type R1 PSOL 28
nMN x Minimum speed R1 30 % 28
nMX x Maximum speed R1 100 % 28
S MX x Maximum store temperature 60 °C [140 °F] 27
OSEM x Store emergency shutdown option OFF 27
EM x Collector emergency temperature 130 °C [270 °F] 27
CMX s Maximum collector temperature 110 °C [230 °F] 29
OCN x Collector minimum limitation option OFF 31
CMN x* Collector minimum temperature 10 °C [50 °F] 31
OCF x Antifreeze option OFF 31
CFR x* Antifreeze temperature 4.0 °C [40.0 °F] 31
OTC x Tube collector option OFF 31
TCST x* OTC starting time 07:00 31
TCEN x* OTC ending time 19:00 31

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Installation Indications, functions and options MessagesCommissioningOperation and function
Adjustment channels
Channel Description Factory setting Page
TCRU x* OTC runtime 30 s 31
TCIN x* OTC standstill interval 30 min 32
GFD x Grundfos Direct Sensor™ OFF 32
OHQM x Heat quantity measurement option OFF 32
SEN x* VFD allocation 2 33
FMAX x* Maximum ow rate 6.0 l/min 32
MEDT x* Antifreeze type 1 33
MED% x* Antifreeze concentration (only if MEDT = propylene or ethylene glycol) 45 % 33
MAN1 x Manual mode R1 Auto 34
MAN2 x Manual mode R2 Auto 34
LANG x Language dE 35
UNIT x Temperature unit °C 35
RESE x Reset - back to factory settings 35
######## 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
⓶Relay 2 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/ ⓶ ❄ Antifreeze function active
☛+ ⓵ ⚠ Manual mode relay 1 ON
☛+ ⓶ ⚠ Manual mode relay 2 ON
☛ ⚠ Manual mode relay 1/2 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
3-port valve
Only the ow direction or
current switching position
is indicated.
Store
with heat exchanger
Backup heating
with burner symbol
Temperature
sensor
Collector
with collector sensor
4.1 Flashing codes
• Pumps are ashing when the corresponding relay is switched on
• Sensor symbols are ashing, if the corresponding sensor display channel is
selected
• Sensors are ashing quickly in the case of a sensor fault
• Burner symbol is ashing if the backup heating is active