Resol DeltaSol Fresh 20 Owner's manual

*11210905* 11210905
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Manual
en
Installation
Operation
Commissioning
Manual for the
specialised craftsman
DeltaSol Fresh®20
www.resol.de

en
2
Subject to technical change. Errors excepted.
© 20180905_11210905_DeltaSol_Fresh_20.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 controller may only be used in technically suitable systems in compliance with
the technical data specied in these instructions. Due to its design the controller
must be mounted and operated as described in these instructions!
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.
Target group
These instructions are exclusively addressed to authorised skilled personnel.
Only qualied electricians should carry out electrical works.
Initial installation must be effected by the system owner or qualied personnel
named by the system owner.
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.

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Navigator
Installation page 4
For the electrical connection of the controller, see page 4.
Commissioning page 6
For commissioning the controller after the installation, see page 6.
Settings page 11
For making adjustments, see page 11.
Contents
1 Overview .............................................................................................. 4
2 Installation of the controller .............................................................. 4
2.1 Overview........................................................................................................................4
2.2 Outputs ..........................................................................................................................5
2.3 Sensors ...........................................................................................................................5
2.4 Mains connection .........................................................................................................5
2.5 Data communication / Bus ..........................................................................................6
3 Commissioning of the controller....................................................... 6
3.1 Operation.......................................................................................................................6
3.2 Commissioning menu..................................................................................................7
3.3 Menu structure .............................................................................................................8
3.4 Selection menu..............................................................................................................9
3.5 Status menu ...................................................................................................................9
3.6 Balance values ............................................................................................................ 10
4 Settings............................................................................................... 11
4.1 DHW heating menu ................................................................................................. 11
4.2 Emergency operation menu.................................................................................... 12
4.3 Circulation menu....................................................................................................... 12
4.4 Disinfection................................................................................................................. 15
4.5 Miscellaneous menu.................................................................................................. 16
4.6 Manual mode menu................................................................................................... 17
4.7 User code.................................................................................................................... 17
4.8 Reset ............................................................................................................................ 17
5 Troubleshooting................................................................................. 18
6 Accessories ........................................................................................ 20
6.1 Sensors and measuring instruments ..................................................................... 20
6.2 Interface adapters...................................................................................................... 20
7 Index ................................................................................................... 21

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1 Overview
• Pre-assembled with all electrical components and ready to plug in
for easy commissioning
• DHW heating to a set temperature
• Digital VFD 2 - 40 Fast Grundfos Direct Sensor™
• Quick reaction to changes in the draw-off ow rate
• Circulation function (temperature-, time- and demand-controlled)
Technical data
Inputs: 3 inputs for Pt1000, 2 digital Grundfos Direct Sensor™ (VFD 2 - 40 Fast)
Outputs: 2 semiconductor relays, 1 PWM output
Switching capacity: 1 (1) A (100…240 V~) (semiconductor relay)
Total switching capacity: 2 A 240V~
Power supply: 100 ... 240V~ (50…60 Hz)
Supply connection: typeY attachment
Power consumption: < 1 W (standby)
Mode of operation: type 1.Y
Rated impulse voltage: 2.5 kV
Data interface: RESOL VBus®
VBus®current supply: 35 mA
Housing: plastic, PC-ABS and PMMA
Mounting: wall mounting, mounting into patch panels is possible
Indication/Display: System-Monitoring-Display
Operation: 3 push buttons
Ingress protection: IP 20/ EN 60529
Protection class: I
Ambient temperature: 0…40 °C
Pollution degree: 2
Dimensions: 172 x 110 x 46 mm
2 Installation of the controller
2.1 Overview
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the device from power supply
before 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!To do so, touch a grounded
surface such as a radiator or tap!
Note
Connecting the device to the power supply must always be the last step
of the installation!
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!
Mains connection (100 … 240 V~) is to be carried out by means of the pre-con-
nected mains cable. Only qualied electricians may carry out electrical works. At-
tention must be paid to the valid local standards, regulations and directives!
Make sure the hydraulic system is properly grounded!

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14
N
S1
Te mp. Sensor Pt1000
S2 S3 VBus PWM
NL
NR2
R1
IP 20
11
R1
Digital
Sensor
1 (1) A (100 ... 240) V~
R2 1 (1) A (100 ... 240)V~
15
12 13
16
17
100 ... 240 V~
50-60 Hz
T4A
18 19
Primärseite Sekundärseite
WW
VFD
R2
S3
KWSp_RL
Sp_VL
P1
R1/PWM
S1
P2
primary side secondary side
2.4 Mains connection
14
N
S1
Te mp. Sensor Pt1000
S2 S3 VBus PWM
NL
NR2
R1
IP 20
11
R1
Digital
Sensor
1 (1) A (100 ...
240) V~
R2 1 (1) A (100 ...
240) V~
15
12 13
16
17
100 ... 240 V~
50-60 Hz
T4A
18 19
DE-33659 Bielefeld
nemux
The power supply of the device must be carried out via an external switch and has
to be 100 … 240 V~ (50 … 60 Hz). Flexible cables are pre-connected with strain
reliefs and the corresponding screws.
• Connect the mains cable to the following terminals:
18 = Neutral conductor N
19 = Conductor L
13 = Protective conductor PE ⏚
2.2 Outputs
The controller is equipped with 2 semi-conductor relays:
• Relay 1 (primary pump) is used for power supply of the primary pump:
R1 = Output R1
N = Neutral conductor N
PE = Protective conductor PE ⏚
• Relay 2 (secondary pump) is used without speed control:
R2 = Output R2
N = Neutral conductor N
PE = Protective conductor PE ⏚
The controller is additionally equipped with a PWM output for connecting high-ef-
ciency pumps:
14
N
S1
Te mp. Sensor Pt1000
S2 S3
VBus PWM
NL
NR2
R1
IP 20
11
R1
Digital
Sensor
1 (1) A (100 ... 240) V~
R2 1 (1) A (100 ... 240) V~
15
12 13
16
17
100 ... 240 V~
50-60 Hz
T4A
18 19
DE-33659 Bielefeld
nemux
PWM output, GND
PWM output, control signal
The PWM output is used for speed control of the primary pump
2.3 Sensors
14
N
S1
Te mp.
Sensor Pt1000
S2 S3
VBus PWM
NL
NR2
R1
IP 20
11
R1
Digital
Sensor
1 (1) A (100 ... 240) V~
R2 1 (1) A (100 ... 240) V~
15
12 13
16
17
100 ... 240 V~
50-60 Hz
T4A
18 19
DE-33659 Bielefeld
nemux
The controller is equipped with 4 sensor inputs in total.
• Temperature sensors have to be connected to the terminals S1 … S3 (either
polarity).
• Connect the Grundfos Direct SensorTM to the upper Digital Sensor input.

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Adjusting values
minimum
value
adjusted value
(not yet con rmed)
maximum
value
current value saved
ÎAdjust the value with buttons 1 or 2, brie y press the button 3; the adjustment
range is displayed as a slide bar.
ÎAdjust the desired value with buttons 1 and 2.
The value is displayed with the handle of the slide bar. Until the new value is saved,
the previously stored value is displayed on the upper right-hand side of the display.
ÎBrie y press button 3 to con rm the adjustment.
ÎPress button 3 again in order to store the adjustment and to get back to the
adjustment menu.
If button 3 is not pressed after an adjustment has been made, the display switches
back to the menu after a few seconds.The adjusted value will not be stored.
Selecting a function or option
ÎSelect the function or option with buttons 1 or 2, then brie y press button 3.
ÎSelect Ye s to activate, or No to deactivate the function. Brie y press button
3 to con rm the selection.
2.5 Data communication / Bus
14
N
S1
Te mp. Sensor Pt1000
S2 S3
VBus
PWM
NL
NR2
R1
IP 20
11
R1
Digital
Sensor
1 (1) A (100 ... 240) V~
R2 1 (1) A (100 ... 240) V~
15
12 13
16
17
100 ... 240 V~
50-60 Hz
T4A
18 19
DE-33659 Bielefeld
nemux
VBus®terminals
The controller is equipped with aVBus®for data transfer with and energy supply to
external modules.The connection is to be carried out at the two terminals marked
VBus (any polarity).
3 Commissioning of the controller
3.1 Operation
1
2
3
backwards (-)
selection / adjustment mode
(OK)
forwards (+)
The controller is operated via the 3 buttons below the display. Button 1 (+) is
used for scrolling forwards through the menu and increasing adjustment values.
Button 2 (-) is used for the opposite direction. Button 3 (OK) is used for se-
lecting channels and con rming adjustments.

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3.2 Commissioning menu
1
2
3
backwards (-)
selection /
adjustment mode
forwards (+)
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
Operation
Changing a value
Con rming a value
to the next
parameter
1
1
3
3
2
2
The commissioning menu consists of the channels described in the following.
Language
ÎAdjust the desired menu language.
Date
ÎAdjust the date. First of all adjust the year, then the month and then the day.
Time
ÎAdjust the clock time. First of all adjust the hours, then the minutes.
HW set temp.
ÎAdjust the hot water set temperature.
Note
In order to use the circulation function, a circulation unit is required!
Circulation
ÎAdjust the circulation mode.
No = no circulation
Thermal = temperature-controlled circulation, with timer (optional)
Demand = Circulation with draw-off detection
Therm.+Dem.= temperature-controlled circulation with additional draw-off
detection, with timer (optional)

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Depending on the circulation mode selected, further adjustment channels will ap-
pear:
Calibration
Automatic secondary circuit  ow rate detection and measurement while the
secondary pump is active (for further information about the offset see page
13)
ÎIn order to carry out the calibration press button 3.
Note
If a circulation is implemented, make sure to run a calibration! Until the
calibration has been carried out, the secondary pump is blocked!
In this case, the acknowledgeable message Run calibr. circ. pump is
displayed.
Ton circ.
ÎAdjust the switch-on temperature for the circulation (only if circulation
mode = Thermal or Therm.+Dem.).
Toff circ.
ÎAdjust the switch-off temperature for the circulation.
Circ. run.
ÎAdjust the runtime for the secondary pump (only if circulation mode = De-
mand or Therm.+Dem.).
OK
ÎSelect the menu item OK
Note
In order to ensure DHW heating also in the case of a sensor fault,
please see chap. 4.2.
3.3 Menu structure
system status
current date current time
currently adjusted
HW set temperature
date of the last draw-off
operation status display
During normal operation, the main display is shown.
Main display
The main display shows the current date and time, the set temperature, date and
time of the last draw-off, operation status and system status.
Operation status display
The operation status display always shows one of the following status:
Ready: Water heating possible upon draw-off
Draw-off: Draw-off in process
BP: Blocking protection active (non-adjustable: daily at 12:00 o'clock,
runtime: 6 s)
0 DHW: No DHW heating possible
!Tmax off: Maximum temperature limitation active
Circ. active: Circulation active
Emergency operation: Emergency operation active

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System status
The system status is displayed graphically as a smiley.The different smiley faces have
the following meanings:
= System OK
= Warning
= Error
If the circulation  ow rate calibration has not yet been carried out, the message No
Calibration will be displayed as a system status warning:
The type of warning or error that has occurred will be displayed as a status in the
operating status display.
Warning and error messages are marked by a triangle in the status menu ⚠.
3.4 Selection menu
In the selection menu, different submenus can be selected and several values can
be adjusted.
ÎIn order to get from the main display to the selection menu, brie y press a
button.
ÎSelect the desired submenu by pressing buttons 1 and 2, and con rm with
button 3.
3.5 Status menu
In this menu, status and error messages as well as current measured values are
displayed.
Possible warnings and error messages
⚠Sensor defective
This message indicates a sensor fault.The name of the defective sensor or sensors
is displayed below:
VFD secondary circuit
The VFD sensor in the secondary circuit is defective.
T-St  ow
The temperature sensor in the store  ow is defective.
T-Circ.
The temperature sensor in the secondary circuit is defective.
⚠Calibration circ. pump
The circulation  ow rate offset has not yet been carried out. The secondary pump
is blocked.
Measured and display values
Emergency operation
Primary pump emergency operation is active.
T-St.  ow
Display range: 0 … 100 °C, defective
Indication of the store  ow temperature in °C.
Disinfection active
Thermal disinfection is active.

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Overrun active
Overrun is active.
T-HW
Display range: 0 … 100 °C, defective
Indication of the hot water temperature in °C.
Hygiene rem.
Display range: 0 … 60 min
Indication of the remaining time of the hygiene disinfection mode in min.
Decontamin. rem.
Display range: 0 … 240 min
Indication of the remaining time of the decontamination disinfection mode in min.
Overrun rem.
Display range: 0 … 60 min
Indication of the remaining overrun time of the decontamination disinfection
mode in min.
Draw-off
Display range: 0 … 45 l/min, defective
Indication of the  ow rate at the VFD in the secondary circuit.
Circulation
Display range:Active, Inactive
Indication of the circulation status.
Note
In order to use the circulation, a circulation unit is required!
T-Circ.
Display range: 0 … 100 °C, defective
Indication of the temperature in the secondary circuit.
Time
Display range: 00:00 … 23:59
Indication of the current clock time.
Date
Display range: 01.01.2001 … 31.12.2099
Indication of the current date.
SW version
Indication of the software version number.
Hydraulic
Indication of the hydraulic variant adjusted.
3.6 Balance values
In this menu, balance values are displayed.Values that are not measured will not
be displayed.
Resetting balance values
Setting the balance values back to 0 is only possible in the expert level.
In order to set a balance value back to 0, proceed as follows:
ÎScroll to the desired value.
ÎSelect the value by pressing button 3.
A security enquiry appears.
ÎCon rm the security enquiry by selecting Ye s .
The balance value has been set back to 0.
In order to set all balance values back to 0, select the menu item Reset all.
A security enquiry appears.
ÎCon rm the security enquiry by selecting Ye s .
All balance values have been set back to 0.
Operation
Indication of the operating days since controller connection.
Draw-off qty
Indication of the draw-off quantity since commissioning in m³. Only values higher
than the adjusted draw-off threshold will be displayed.
T-St._ min
Indication of the store  ow minimum temperature in °C.
T-St._ max
Indication of the store  ow maximum temperature in °C.
T-HW min
Indication of the hot water minimum temperature in °C.
T-HW max
Indication of the hot water maximum temperature in °C.

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T-Circ. min
Indication of the minimum temperature at the circulation sensor in °C.
T-Circ. max
Indication of the maximum temperature at the circulation sensor in °C.
Primary pump
Indication of the primary pump operating time in h.
Circulation pump
Indication of the secondary pump operating time in h.
P1 swp
Indication of the switching processes at P1.
P2 swp
Indication of the switching processes at P2.
P1 1-10 … P1 91-100
Indication of the primary pump operating time at the corresponding speed in h.
Reset all
Set all balance values back to 0.
4 Settings
Note
The displayed values and options depend on the functions and only ap-
pear if these are available for the adjusted system parameters.
4.1 DHW heating menu
In the DHW heating menu, all adjustments for the DHW heating can be made.
HW set temperature
Hot water set temperature adjustment.
HW set temp.
Adjustment range: 45 … 60 °C
Factory setting: 50 °C
Note
In order to use the circulation, a circulation unit is required!
Draw-off detection
Flow rate adjustment for the draw-off detection. A  ow rate equal to or higher
than the adjusted value will be detected as a draw-off.
This adjustment value is visible and adjustable in the expert level only.
Draw-off min.
Adjustment range: 1.0 … 5.0 l/min
Factory setting: 1.5 l/min

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4.2 Emergency operation menu
The Emergency operation can be used for ensuring the hot water supply in the
case of a sensor fault. In this case, the primary pump will permanently run at the
adjustable Emergency speed. For this function, the emergency speed must be
aligned with the resulting hot water temperature.The display channel T-HW en-
ables this alignment directly in the Emergency operation menu. If a sensor fault
inhibiting DHW heating has occurred, activate the emergency operation in the
Emergency operation channel.
Activ. Emergency operation
Selection:Yes, No
Factory setting: No
T-HW
Display range: 0 … 100 °C
Emergency speed
Adjustment range: 1 … 100 %
Factory setting: 12 %
Note
In order to ensure a quick entry to emergency operation in the case of
an emergency, perform the alignment of the emergency speed as early
as possible.
The Emergency speed is also available as the selection Emerg in the Primary
pump channel of the Manual mode menu.Thus, the primary pump speed can
also be limited in manual mode in order to ensure scald protection.
Note
When emergency operation is active, the adjustment channel Primary
pump is not available in the Manual mode menu!
4.3 Circulation menu
Note
In order to use the circulation, a circulation unit is required!
In the Circulation menu, all adjustments for the circulation can be made.
Circulation
In the Circulation channel, the circulation mode can be adjusted. The following
circulation modes are available:
No = no circulation
Thermal = temperature-controlled circulation
Demand = circulation with draw-off detection
Therm.+Dem. = temperature-controlled circulation with additional draw-off
detection
Note
If a circulation is implemented, make sure to run a calibration! Until the
calibration has been carried out, the secondary pump is blocked!
In this case, the acknowledgeable message Run calibr. circ. pump is
displayed.

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13
Demand
In the Demand circulation mode, the secondary pump will be activated for the
adjustable runtime Circ. run, when a draw-off has been detected.The Toff circ.
switch-off temperature serves as the switch-off condition.
Thermal
In the Thermal circulation mode, the secondary pump is activated and deactivat-
ed depending on the adjustable temperaturesTon circ. and Toff circ. Additionally,
three time frames can be adjusted for each day of the week. Outside these time
frames, the circulation remains inactive.
Therm.+Dem.
In theTherm.+Dem. circulation mode, both switching conditions are valid. Demand
takes priority: the secondary pump will be activated upon a draw-off, even if the
switch-on conditions for the Thermal circulation mode are not ful lled. The Toff
circ. switch-off temperature serves as the switch-off condition.
Depending on the circulation mode selected,further adjustment channels will appear:
Circulation  ow rate calibration
The circulation  ow rate calibration enables the controller to detect a DHW
draw-off even while the secondary pump is running.
The circulation  ow rate calibration can be carried out in the Circ.  ow rate
submenu.
The calibrated value for the circulation  ow rate and the date of the last calibration
are available.
If the Calibration menu item is selected,the secondary pump is activated at 100%
speed and the  ow rate is measured at the VFD. The value measured is stored as
the circulation  ow rate and will be displayed in the Circ.  ow rate channel.This
value then serves as the reference value for the draw-off detection.
In the "last" display channel, the date of the last calibration is indicated.
Note
If a circulation is implemented, make sure to run a calibration! Until the
calibration has been carried out, the secondary pump is blocked!
In this case, the acknowledgeable message Run calibr. circ. pump is
displayed when leaving the menu.
Note
In order to run the calibration, all draw-off points must be closed.
If the  ow rate exceeds the reference value while the secondary pump is active, the
controller detects a draw-off and the circulation pump will be deactivated.
Circulation switch-on temperature
Ton circ.
Adjustment range: 30 … 59 °C
Factory setting: 40 °C
Circulation switch-off temperature
Toff circ.
Adjustment range: 31 … 60 °C
Factory setting: 45 °C
If the Thermal or Therm.+Dem. circulation mode has been selected, a switch-
on temperature Ton circ. can be adjusted for the circulation.The switch-off tem-
perature Toff circ. can be adjusted in all circulation modes (except for none).
If the temperature at sensor S3 in the secondary circuit falls below the switch-on
temperature, the controller activates the secondary pump.

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14
If the temperature at sensor S3 in the secondary circuit exceeds the switch-off
temperature, the controller deactivates the secondary pump.
This switch-off condition is valid for all circulation modes and also during the runt-
ime Circ. run. after a draw-off detection.
Note
The switch-off temperature must be adjusted at least 1 °C higher than the
switch-on temperature.
Circulation runtime
Circ. run.
Adjustment range: 10 … 990 s
Factory setting: 300 s
If the Demand or Therm.+Dem. circulation mode has been selected, the circu-
lation runtime Circ. run. can be adjusted for the circulation.
The runtime determines how long the secondary pump will remain active after
the detected draw-off. The Toff circ. switch-off condition is also valid during the
circulation runtime.
Thermal circulation timer
Timer / daily, Mo … Su / t1_(2,3) on
Adjustment range: 00:00 … 23:45
Factory setting: 07:00 (t1_on)
07:00 (t2_on, t3_on)
If the Thermal or Therm.+Dem. circulation mode has been selected, the Tim-
er menu item appears.
When Timer is selected, the days of the week (Mo … Su) can be selected indi-
vidually. For each day of the week, 3 time frames can be adjusted. When daily is
selected, 3 time frames can be adjusted which will be valid on all days of the week.
Timer / daily, Mo … Su / t1_(2,3) off
Adjustment range: 00:00 … 23:45
Factory setting: 22:00 (t1_off)
07:00 (t2_off, t3_off)
Note
Adjustments made for individual days will not overwrite the adjustments
made in daily!
If tx_on = tx_off, the corresponding time frame is inactive.
Outside these time frames, the thermal circulation remains inactive. In the
Therm.+Dem. circulation mode, the Demand switch-on conditions are valid out-
side the time frames.

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4.4 Disinfection
Note
In order to use the thermal disinfection, a circulation unit is required! The
circulation pump has to be connected to the controller.
The thermal disinfection function offers two possibilities to reduce germ contami-
nation of the water inside the circulation circuit. In the Disinfection mode channel,
the disinfection modes Hygiene or Decontamination can be selected.The Dis-
infection is deactivated by default (No).
The Hygiene variant can be used to perform regular potable water hygiene meas-
ures in the circulation system.
The Decontamination variant can be used to decontaminate systems that are
contaminated with Legionella.
Note
The disinfection modes Hygiene and Decontamination can only be acti-
vated when one of the circulation modes is activated.
Hygiene:
The Hygiene is started automatically at the adjusted Hygiene starting time.The
primary pump is controlled such that the temperature at the hot water  ow sen-
sor (VFD) reaches the T-set hygiene temperature. If the temperature at the cir-
culation sensor (S3) reaches a value 2Kbelow the T-set hygiene temperature, the
hygiene is considered completed.The primary pump will switch off.The circulation
pump will remain active for the non-adjustable overrun time of 5 minutes in order
to cool down the heat exchanger, thus preventing its calci cation.
The Duration hygiene can be used to determine the time during which the T-set
hygiene temperature must be reached. If the required temperature at the circula-
tion sensor is not reached within this time, hygiene will be stopped even though it
has not been completed.The primary pump will be switched off and the circulation
pump overrun starts in order to cool down the heat exchanger.
Hygiene disinfection set temperature
T-set hygiene
Adjustment range: 55 … 65 °C
Factory setting: 62 °C
Hygiene disinfection duration
Duration hygiene
Adjustment range: 3 … 60 min
Factory setting: 30 min
Hygiene starting time
Start. t. hygiene
Adjustment range: 00:00 … 23:59
Factory setting: 23:00
Decontamination:
The decontamination can only be started manually by means of the menu item
START in the start decontamin. adjustment channel. Selecting the menu item
STOP will cancel an active decontamination.
The primary pump is controlled such that the temperature at the hot water  ow
sensor (VFD) reaches the T-set decontamin. temperature.
Decontamination is considered completed when the adjusted Duration decon-
tamin. has elapsed and the temperature at the circulation sensor (S3) has reached
a value 2Kbelow theT-set decontamin.temperature.The primary pump will switch
off.The circulation pump will remain active for the adjustable Duration overrun
in order to cool down the heat exchanger, thus preventing its calci cation.
Note
For a complete decontamination of a hot water system, water has to be
drawn off at each draw-off point for at least 3 min at 70°C.

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16
Note
When the Disinfection duration has elapsed but the required tempera-
ture has not been reached at the circulation sensor, the message ⚠End
of disinf. is indicated.The controller will continue to control the primary
pump such that T-set decontamin. is reached in order to directly detect
the consequences of a system alteration.Thus, by reading out T-HW, it
is possible to see if, by heating the store to a higher temperature,T-set
decontamin. can be reached in the hot water  ow.
Decontamination disinfection set temperature
T-set decontamin.
Adjustment range: 60 … 75 °C
Factory setting: 72 °C
Decontamination disinfection duration
Duration decontamin.
Adjustment range: 30 … 240 min
Factory setting: 60 min
Manual decontamination start
Start decontamin.
Adjustment range: START, STOP
Factory setting: START
Decontamination overrun duration
Duration overrun
Adjustment range: 10 … 60 min
Factory setting: 60 min
4.5 Miscellaneous menu
In the Misc. menu, all basic parameters for the controller can be adjusted. Normal-
ly, these settings have been made during commissioning.They can be subsequently
changed in this menu.
Language
Selection: deutsch (German), english
Factory setting: deutsch (German)
In this adjustment channel, the desired menu language can be selected.
Date
Adjustment range: 01.01.2001 … 31.12.2099
Factory setting: 01.01.2011
In this adjustment channel, the current date can be adjusted.
First of all adjust the year, then the month and then the day.
Time
Adjustment range: 00:00 … 23:59
Factory setting: 12:01
In this adjustment channel, the current time can be adjusted.
First of all adjust the hours, then the minutes.

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4.6 Manual mode menu
In the Manual mode menu, the operating mode of both relays can be adjusted.
The adjustment channels are named after the pumps connected.
R1 primary pump
Selection: On, Emerg,Auto, Off
Factory setting:Auto
If the operating mode for R1 primary pump respectively is set to On,Emerg
or Auto, this will only affect the speed control signal sent to the primary pump
via the PWM output.The 100 % power supply to the pump is kept up via relay 1.
R1 primary pump operation modes:
On = Power supply 100 %, speed control signal via PWM output 100 %
Emerg = Power supply 100 %, speed control signal via PWM output as adjusted
in the Emergency operation menu
Auto = Power supply 100 %,  exible pump speed signal via PWM output
Off = Power supply 0 %, speed control signal via PWM output 0 %
Note
When emergency operation is active, the adjustment channel Primary
pump is not available in the Manual mode menu!
R2
Selection: On,Auto, Off
Factory setting:Auto
On = Relay active at 100 % speed (manual mode)
Auto = Relay is in automatic mode
Off = Relay is switched off (manual mode)
Note
After service and maintenance work, the operating mode must be set
back to Auto. Otherwise normal operation will not be possible.
4.7 User code
In the User code menu, a user code can be entered. Each number of the 4-digit
code must be individually adjusted and con rmed. After the last digit has been con-
 rmed, the controller automatically displays the superior menu level.
To access the menu areas of the expert level, the expert user code must be en-
tered:
Expert user code: 0262
If no entry is made for 4 min, the controller will automatically block access to the
expert level. If further adjustments are to be made in the expert level, the user
code has to be entered again.
4.8 Reset
In the Reset menu, the controller can be set back to its factory settings.
If Reset is selected, a security enquiry appears.
ÎIn order to carry out the reset, select Ye s .
All adjustment values will be set back to their individual factory settings.All balance
values have been set back to 0.
ÎIn order to abort the reset, select No.

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The message !Sensor fault instead of a temperature is shown on the sensor
display channel.
Sensor fault.
5 Troubleshooting
If a malfunction occurs, a message will appear on the display of the controller.
The controller is protected by a fuse.The fuse holder (which also holds the spare
fuse) becomes accessible when the cover is removed.To replace the fuse, pull the
fuse holder from the base.
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the device from power supply be-
fore opening the housing!
The display is permanently off.
Press any button. Display illuminated?
no yes
Controller has been in standby,
everything o.k.
Check the supply line and recon-
nect it.
The fuse of the controller could
be blown.The fuse holder (which
holds the spare fuse) becomes
accessible when the cover is
removed.The fuse can then be
replaced.
Check the power supply of the controller. Is it disconnected?
no yes
°C Ω
Pt1000
°C Ω
Pt1000
-10 961 55 1213
-5 980 60 1232
0 1000 65 1252
5 1019 70 1271
10 1039 75 1290
15 1058 80 1309
20 1078 85 1328
25 1097 90 1347
30 1117 95 1366
35 1136 100 1385
40 1155 105 1404
45 1175 110 1423
50 1194 115 1442
Short circuit or line break.
Disconnected temperature sensors can be
checked with an ohmmeter. Please check if the
resistance values correspond with the table.
Fuse

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Pump noise can be heard, bubbling in the pipes.
System vented?
no
Vent the system.
Draw-off amount is too small.
Sufcient system pressure in the
secondary circuit?
yes no
Plate heat exchanger calcied?
Check system pressure in the sec-
ondary circuit; if necessary, increase
pressure.
yes
Draw-off temperature is too low.
Increase the adjustment value for
the HW set temperature.
Is the HW set temperature high
enough?
yes no
Clean the secondary side of the
plate heat exchanger; if necessary,
replace the plate heat exchanger.
Pressure loss in the primary circuit
too high?
yes Check the pipework of the primary
circuit; change if necessary.
DHW heating does not work
Check the controller; Check the
fuse of and the power supply to the
controller.
Controller in operation?
yes no
System vented?
no
Vent the system.
yes
Has the digital Grundfos Direct
Sensor™ in the HW ow been
connected and grounded correctly?
Does it work faultlessly? Check the digital Grundfos Direct
Sensor™ VFD 2-40 Fast including its
cable; check the tting for correct
grounding; check the insert integrat-
ed in the tting; if necessary, replace
the sensor.
no
yes
Check the Pt1000 temperature
sensor including the sensor cable; if
necessary, replace the sensor.
Has the temperature sensor in
the store ow been connected cor-
rectly? Does it work faultlessly?
yes no
Does the primary pump work
faultlessly?
no Check the primary pump including
its cable; dismount and replace the
pump if necessary.

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6 Accessories
6.1 Sensors and measuring instruments
Temperature sensors
The product range includes high-precision platinum temperature sensors, atscrew
sensors, outdoor temperature sensors, indoor temperature sensors, cylindrical cli-
pon sensors, also as complete sensors with immersion sleeve.
Order information can be found in our catalogue and on our Website.
AM1 Alarm Module
The AM1 Alarm Module is designed to signal system failures. It is to be connected
to theVBus®of the controller and issues an optical signal via the red LED if a failure
has occurred.The AM1 also has a relay output, which can e. g. be connected to a
building management system (BMS).Thus, a collective error message can be issued
in the case of a system failure.
The AM1 Alarm module ensures that occurring failures can be immediately recog-
nised and repaired, even if the system and the controller are difcult to access or
located in a remote place. Thus, the reliability and the stable yield of the system
are ensured.
6.2 Interface adapters
VBus®/ USB interface adapter
The VBus®/ USB interface adapter is the interface between the controller and a
personal computer.With its standard mini USB port it enables a fast transmission
of system data for processing, visualising and archiving as well as the parametrisati-
on of the controller via theVBus®.The ServiceCenter software is included.
VBus®/ LAN interface adapter
The VBus®/ LAN interface adapter is designed for the direct connection of the
controller to a PC or router. It enables easy access to the controller via the local
network of the owner.Thus, controller access, system parameterisation and data
charting can be effected from every workstation of the network.The VBus®/ LAN
interface adapter is suitable for all controllers equipped with a VBus®.The Service-
Center software is included.