oventrop REGTRONIC PX User instructions

ASSEMBLY AND OPERATING
MANUAL
Microcontroller-controlled temperature difference controller for solar thermal systems
Oventrop
REGTRONIC PX
oventrop
Regtronic PX
Important!
Please read the instructions carefully before installing and operating the unit!
Failure to do so can void product warranty!
Please keep the instructions in a safe place!
The unit described herein has been manufactured and inspected according to CE regulations.

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Table of contents:
1 SYMBOLS AND ABBREVIATIONS...................................................................................................................3
2 APPLICATIONS / FEATURES...........................................................................................................................4
2.1 B ASIC INFORMATION .....................................................................................................................................4
2.2 A PPLICATIONS ..............................................................................................................................................4
2.3 U NIT FEATURES ............................................................................................................................................4
3 SAFETY ADVICE ...............................................................................................................................................5
3.1 E SSENTIAL SAFETY ADVICE ............................................................................................................................5
3.1.1 Avoiding the risk of explosion ................................................................................................................5
3.1.2 Avoiding a lethal hazard due to electric shocks.....................................................................................5
3.1.3 Avoiding a fire hazard ............................................................................................................................5
3.1.4 Avoiding a risk of injury due to burning..................................................................................................5
3.1.5 Preventing material damage..................................................................................................................5
3.2 S TRUCTURAL FEATURES OF THE INFORMATION ON DANGERS ...........................................................................6
3.3 S TRUCTURAL FEATURES OF THE INFORMATION ON MATERIAL DAMAGE AND ENVIRONMENTAL POLLUTION ...........6
4 UNIT INSTALLATION ........................................................................................................................................7
4.1 O PENING THE UNIT ........................................................................................................................................8
4.2 W ALL INSTALLATION ......................................................................................................................................8
5 ELECTRICAL CONNECTIONS – OVERVIEW..................................................................................................9
5.1 G ENERAL CONNECTION GUIDELINES :............................................................................................................10
5.2 115 V CONNECTORS ...................................................................................................................................11
5.3 C ONNECTING SENSORS ...............................................................................................................................11
5.4 S URGE PROTECTION MODULE ......................................................................................................................11
6 OPERATION / DISPLAY..................................................................................................................................12
6.1 O VERVIEW OF DISPLAY AND CONTROL BUTTONS ...........................................................................................12
6.2 S CREEN .....................................................................................................................................................13
6.3 E XPLANATION OF ICONS ..............................................................................................................................13
6.4 B UTTON FUNCTIONS ....................................................................................................................................14
6.5 C ONTROL UNIT USAGE EXAMPLE ..................................................................................................................15
6.5.1 Changing Target dTon temperature.....................................................................................................15
7 USER MENUS..................................................................................................................................................19
7.1 O VERVIEW : MENU LAYOUT ...........................................................................................................................20
7.2 "I NFO " MENU ........................................................................................................................................21
7.3 "P ROGRAMMING " MENU ........................................................................................................................21
8 CONTROL UNIT FUNCTIONS.........................................................................................................................22
9 DATA INTERFACE - DATASTICK
®
.................................................................................................................22
9.1 D ATA S TICK
®
...............................................................................................................................................22
9.2 D ATA LOGGING ...........................................................................................................................................22
10 TROUBLESHOOTING......................................................................................................................................24
10.1 R EPORTABLE FAULTS ..................................................................................................................................24
10.2 N ON - REPORTABLE FAULTS ..........................................................................................................................25
11 TECHNICAL DATA ..........................................................................................................................................26
12 RESISTANCE TABLE PT1000 ........................................................................................................................26
13 OVENTROP CORP. - LIMITED WARRANTY..................................................................................................27

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1 S YMBOLS AND ABBREVIATIONS
Explanation of the icons used in this Operating Manual:
• List
 Please note!
i Usage tips / special information
§User action / procedure
? Inspection / check
Frequently-used abbreviations
Abbreviations and symbols are sometimes
used to improve legibility in this
documentation and on the display of the
control unit itself. Their meanings are
presented in the following table.
Abbreviat
ion Meaning Abbrevia tion Meaning
Start Initial value °F Degrees Fahrenheit
Stop Final value dT Temperature difference
> Larger than kWh Energy output in kWh
h Operating hours

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2 APPLICATIONS / FEATURES
2.1 Basic information
The controller is designed as a system
control unit, meaning it is suitable for a
variety of systems, depending on the
functional layout and options selected.
The information provided in the following
therefore details the general functionality
of the controller.
The various functional layouts and
corresponding connection diagrams are
described in separate documents.
Since the controller can be used in many
different ways, it is important that you
read the Operating Manual before
connecting and starting up the unit!
2.2 Applications
The controller is used to control the
functionality of solar thermal plant by
providing ancillary and protective features.
The controller is designed to be used in dry
environments such as those found in
residential, office and commercial interiors.
If you wish to use the unit for other
purposes, please check applicable statutory
regulations prior to use.
2.3 Unit features
The control unit can be used with many
types of system.
Regardless of the specific application, the
unit offers the following standard features:
•Easy, menu-driven operation using
icons, simple text messages and four
control buttons.
•All presets and control values can be set
digitally
•Integrated operating hours counter for
memory loading
•Powerful system monitoring
functionality, with errors and faults
displayed using icons and simple text
•Integrated energy output
measurement: the output measurement
set (optional accessory) can be used to
record the energy produced by the solar
plant
•Indefinite storage of all configured values
if power supply fails.
•Various protective features, such as:
- System protection
- Collector protection
- Recooling
- Frost protection
•DataStick® interface
A DataStick® (optional accessory) provides
a simple way to carry out data logging.
Available accessories (optional):
•PT1000 temperature sensors
•Flow transmitters for output
measurement
•Radiation sensors
•DataStick® for data logging and
programming using a PC

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3 S AFETY ADVICE
3.1 Essential safety advice
3.1.1 Avoiding the risk of explosion
•The unit is unsuitable for use in areas in
which there is a risk of explosion. Never use the unit in an environment in which
there is a risk of explosion.
3.1.2 Avoiding a lethal hazard due to electric shocks
•Have all work on the electrical
connections carried out by qualified
specialist electricians only.
The specialist personnel must have the
knowledge, skills and experience
necessary for handling electrical systems
and working on the local power supply as
specified at the installation location.
•Make sure that all regulations applicable
at the installation location are observed.
Installation, connection to mains and
use of the equipment shall be in
accordance with the National
Electrical Code.
•Carry out all work on the unit only when
this has been de-energized.
•Make sure that the current supply
connections are not interchanged with
those of the protective low-voltage area.
•Following all work, close the casing
cover until it engages and tighten the
locking screw hand-tight.
•Make sure that the mains connection
can be interrupted with an external
switch.
•The possibility of fatal electric shocks
exists on damaged units. Only use the
unit in flawless condition. Immediately
shut down damaged units.
•A danger of electric shocks exists on
tearing off connections with flexible
cables due to tensile strain.
Make sure that all cables are secured
with a strain relief device.
3.1.3 Avoiding a fire hazard
•Install the unit on a noncombustible surface only.
3.1.4 Avoiding a risk of injury due to burning
•Only install the temperature sensors when
the system has cooled down to hand
temperature. Otherwise, there is a risk of
injury due to burning on hot parts of the
system.
3.1.5 Preventing material damage
•Only use the unit in flawless condition.
Damaged units may cause system
malfunctions and damage its components.
•Prevent moisture or liquids from entering
the unit. If moisture nevertheless enters
the unit, immediately have the unit
disconnected from the mains power supply
by qualified specialist personnel. Before
reusing the unit, contact your specialist
dealer and carry out the measures
stipulated by this party.
•Damage possible due to excessively
high temperatures. Make sure that none
of the unit's components is exposed to a
temperature outside of the permissible
operating range. Data on the permissible

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operating range can be found in the
section entitled "Technical data".
Make sure that none of the system's
electrical components are damaged due to
the temperatures which occur during
operation. Only use materials which are
suitable for the operating temperatures
specified in the system documentation.
•Make sure that all of the system's electrical
components are suitable for an operating
voltage of 115 V / 50/60 Hz. The
components may otherwise be damaged.
•Only operate the system briefly, and only
for test purposes, in "Manual mode".
Monitoring of maximum temperatures and
sensor function is switched off in this
operating mode. During uncontrolled
operation, the regulator is not switched off
automatically in the event of faults.
Regulator or system malfunctions may
occur.
•Damage to the temperature sensors or
malfunctions in the event of incorrectly
positioned temperature sensors.
Only install the temperature sensors in
the intended position on the collectors.
Install the temperature sensors in such a
way that good heat transfer is ensured.
Route the cables to the temperature
sensors separately from the mains
cables.
•The inputs can be better protected with
additional overvoltage protection
(Sensor connection box). Malfunctions
are possible on use of sensor
connection boxes from third-party
manufacturers. Use sensor connection
boxes supplied by the manufacturer
only.
•Damage to the casing on excessive
tightening of the screws during
installation. Tighten all screws hand-tight
only.
3.2 Structural features of the information on dangers
DANGER
Notes containing the word DANGER warn of a hazardous
situation which leads to fatal or severe injuries.
WARNING
Notes containing the word WARNING warn of a hazardous
situation which may possibly lead to fatal or severe injuries.
CAUTION
Notes containing the word CAUTION warn of a situation which
may lead to slight or moderate injuries.
3.3 Structural features of the information on material damage and
environmental pollution
Notice!
These notes warn of a situation which leads to material damage
or environmental pollution.

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4 U NIT INSTALLATION
DANGER
Lethal hazard on installation in areas in which there is a risk of
explosion or on combustible surfaces.
Do not use the unit in areas containing explosive materials.
Install the unit on a noncombustible surface only.
DANGER
Lethal hazard due to electric shocks when working on the
electrical system.
Have all work on the electrical system carried out by qualified
specialist personnel only.
Prior to all work, make sure that the unit has been disconnected
from the mains power supply.
Following all work, close the casing cover until it engages and
tighten the locking screw hand-tight.
Notice!
Damage to the casing on excessive tightening of the screws
during installation.
Tighten all screws hand-tight only.
 When integrated with the Regusol, removal of the controller is unnecessary!

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4.1 Opening the unit
Before opening, ensure the unit is isolated
from the power mains. If a locking screw
has been attached to the cover of the unit,
you will need to remove this first. The top of
the casing snaps onto the lower part of the
unit on both sides. You can release the top
of the casing by pulling gently on the sides
of the cover (see picture) and then pivoting
the cover upwards.
Continue to pull the cover
upwards until it snaps into
place. This will enable
you to easily install and
connect up the control
unit
4.2 Wall installation
If installing the unit on a wall, proceed as follows:
•Drill the mounting holes to match the drilling
template provided
•Screw in the two upper screws so that they
project 6 mm from the wall
•Open the unit as described above and hang it on
to these two screws. You can now screw in the
two lower screws.
•Tighten all screws only as much as
necessary, to avoid damaging the lower part
of the unit casing!
126mm
118mm
84mm
Remove screw

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5 E LECTRICAL CONNECTIONS – O VERVIEW
DANGER
Lethal hazard due to electric shocks when working on the
electrical system.
Have all work on the electrical system carried out by qualified
specialist personnel only.
Prior to all work, make sure that the unit has been disconnected
from the mains power supply.
Following all work, place the cover onto the casing until it engages
and tighten the locking screw hand-tight.
DANGER
Lethal hazard due to electric shocks on tearing off connections
with flexible cables due to tensile strain.
Make sure that all cables are secured with a strain relief device.
Notice!
Damage to the unit or malfunctions on use of unsuitable
components.
Make sure that all of the system's components are suitable for an
operating voltage of 115 V / 50/60 Hz.
Notice!
Malfunctions are possible on use of sensor connection boxes
from third-party manufacturers.
Use sensor connection boxes supplied by the manufacturer only.

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All electrical connections are made to the
subassembly in the lower part of the unit.
(SELV) connectors for sensors and flow
transmitters are located on the right-hand
side of the subassembly. The 115 V
connectors are located on the left-hand
side. The number and location of 115 V and
sensor connectors is described on the data
sheet corresponding to the layout used.
5.1 General connection guidelines:
•When connecting all cables, strip the cable covering to a length of approx. 3” and the wires
to a length of approx. 4”.
•For flexible cables, a strain relief device must be present on the interior or exterior of the unit.
On the 115 V side, this can be done by mounting a max. of 4 M12 cable screws.
The ends of the wires must be covered with wire end ferrules. The cables are fed through
openings in the unit.
•All ground leads must be attached to the terminals marked "PE" (potential earth).
•Installation, connection to mains and use of the equipment shall be in accordance with the
National Electrical Code.
A7
PFC
6 x 115 V
output Line voltage
10 x
PT1000 input Grundfos sensor
115V
-
AC

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5.2 115 V connectors
One mains connector is provided, plus a
total of 6 115 V/50-60 Hz outputs. Bear in mind the following points concerning the 115 V connectors:
 If the control unit is wired directly into
the mains, it must be possible to
separate from power mains through a
switch external to the unit.
If the unit is connected using a cable
and grounded plug, this switch is not
necessary.
i The neutral lead terminals (N) are
connected electrically and are not
switched!
i All switched outputs (A1 to A6) are
electronic 115 V AC make contacts. If
you need potential-free contacts, then
suitable accessory parts can be
supplied.
i Depending on which functional layout is
used, all outputs can be applied as
switched outputs or – using block
modulation – as pump power controls.
i All output activity is monitored
electronically. A functional check is
made automatically once a day, and
can also be started manually from the
Manual Operation menu.
i If the functional check fails, then this will
close a potential-free contact (A7).
5.3 Connecting sensors
The control unit works with high-precision platinum PT1000 temperature sensors. Between 2
and 10 sensors will be needed, depending on the system setup and functional layout. In some
layouts the use of radiation sensors and flow transmitters will also be required. Inputs 1 to 7 are
suitable for temperature sensors. Inputs 8 to 10 are universal inputs, which can be used for
temperature sensors, radiation sensors or digital inputs.
Temperature sensor installation /
cabling:
§Mount the sensors in the corresponding
places on the collector and storage
tank. When doing so, ensure good
temperature transfer, using heat-
conductive paste if necessary.
§The temperature sensor cabling can be
extended if required. Cross-sections
required: lengths up to 49ft., 2 x 0.5
mm²; AWG22 lengths up to 164ft., 2 x
0.75 mm², AWG20. Use shielded
extension cables for long connections
(e.g. to collector).
Do not insert shielded cable on the
sensor side – clip it and strip it! The
shield must be grounded (PE).
§Temperature sensors are connected
according to the system setup. You do
not need to observe polarity for the two
wires when cabling temperature
sensors.
 When laying sensor cabling, keep it
away from 115 V cables: these can be a
source of electrical interference under
adverse conditions. Keep cabling at
least 6” apart.
5.4 Surge protection module
The control unit is provided with fine-level
surge protection for all sensor inputs. As a
rule, you will not need to take additional
precautions for interior sensors.
However, we recommend additional
protection for collector sensors and exterior
sensors (sensor connection box with surge
protection). Exterior protective devices must
not contain any additional capacitors, as
these may distort measurement readings.

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6 O PERATION / D ISPLAY
6.1 Overview of display and control buttons
oventrop
Regtronic PX
Number Description
1 Screen with graphical icons and 3-line simple text display
2 Page up / + button
3 Exit / Cancel / ESC button
4 Page down / - button
5 Select / Confirm / Enter button
1
2
3
4
5

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6.2 Screen
The screen displays graphical icons and simple text messages. The three-line simple text
display is used to show display and programming values, relating these to measuring points.
Main menus
Measuring point reference
Value / unit
Additional information
Status display
6.3 Explanation of icons
The following table describes the meanings of the various icons used.
Status display
Regulator active
Icon rotates if solar circuit pump is
switched on
Displays active switched outputs Numbers of active switched outputs
!
Indicates a system error Display flashes if an error occurs in the
system
ok?
Used to confirm the saving of
changed values Value displayed can be
rejected or
confirmed
Icon Description Display during operation
Main menu
"Info" menu
"Programming" menu
"Manual operation" menu
"System Settings" menu
Icon flashes if selectable.
Select with button
If only one icon is displayed, this menu is
active

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6.4 Button functions
The 4 control buttons provide simple and
easy operation of the control unit. You can
use the control buttons to:
•Display readings
•Make changes to unit settings
Use the icons on the display to guide you
quickly through the various options, with
clear indication of the current menu
selection, reading or parameter.
The control buttons have the following
functions:
Button Function Description
"Up"
„+“ • Page up in the menu
• Change value: stepped increase of the value displayed
If the button ispressed and held, values increase
Continuously
"Access"
"Down"
„-“
• On the start screen: accesses a main menu
• Page back in the menu
• Change value: stepped decrease of the value displayed
If the button is pressed and held, values decrease
continuously
"Page left"
"Exit"
"Cancel"
• Page left in a main menu
• Exit from a menu
•Exit from a menu item
• Cancel a modification made to a value without saving
"Page right"
"Select"
"Confirm"
• Page right in a main menu
• Select a menu item
• Confirm and save a modification made to a value

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6.5 Control unit usage example
6.5.1 Changing Target dTon temperature
Once you have familiarized yourself with the
menu descriptions in the "User menus"
section, you can start making some
operational changes. The example below
describes one such operational procedure.
The starting point here is the "Info" menu,
showing the current collector temperature.
Objective: Change the parameter "Target
dTon" from 7 K to 5 K, using the
"Programming" menu.
Escape: Exit the "Info" menu
Page right: Select "Programming" menu
Select "Programming" menu
In the "Programming" menu, page until the submenu "Storage
tank" is shown.
Select submenu "Storage tank"
In the submenu, page until the value "Target dTon" is shown.
Collector
122.F
32<-
.
F->153
Flashes
12:09:24
Flashes
12:09:24
Storage tank
149.F
maximum
Storage tank
[ alues]

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Select value: the value "Target dTon" now begins to flash
Decrease the value until the chosen value is selected. Value
continues to flash.
Select "Confirm value"
or
Icon
ok?
flashes.
Confirm the change. Change is applied.
Leave value as-is: change is not applied
2 x Exit submenu "Storage tank"
Exit "Programming" menu
Storage tank
12
Target dTon
Storage tank
9
Target dTon
Storage tank
9
Target dTon
ok?
Flashes
12:09:24

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Corresponding settings in the "Programming" menu
The MFR1 is configured in the "Programming" menu by selecting the
submenu MFR1
Limiting the maximum temperature of the energy sink, such as for the
storage tank accepting energy.
The function is switched off once the energy sink sensor reaches the
switch-off temperature.
Limiting the minimum temperature of the energy source, such as for
the storage tank releasing energy.
The function is only switched on once the energy source sensor
reaches the switch-on temperature – in addition to the temperature
difference required between the energy source and sink.
Switch-on difference between energy source and energy sink.
Switch-off difference between energy source and energy sink.
Start time of the 1st time frame for the MFR.
MultiReg 1
[ alues]
Diff. regl.
Diff. regl.
149.F
maximum
Diff. regl.
59.F
minimum
Diff. regl.
12
dTmax
Diff. regl.
6
dTmin
Diff. regl.
0:00
Time 1: Start

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Stop time of the 1st time frame for the MFR.
Defining a time frame from 0:00 to 23:59 means the function will be
permanently activated.
Start time of the 2nd time frame for the MFR.
Stop time of the 2nd time frame for the MFR.
If the start time and stop time of a time frame are identical, this time
frame will be deactivated, that is, will not be taken into account.
Start time of the 3rd time frame for the MFR.
Stop time of the 3rd time frame for the MFR.
Time frame is also deactivated.
Corresponding display in the "Info" menu
Display of the temperature of the energy source sensor in the
"Information" menu, with minimum and maximum values. The
corresponding measuring point – here T7 – is also displayed.
Diff. regl.
23:59
Time 1: Stop
Diff. regl.
12:00
Time 2: Start
Diff. regl.
12:00
Time 1: Start
Diff. regl.
18:00
Time 3: Start
Diff. regl.
TROL
18:00
Time 3: Stop
Diff. regl. Î
ÎÎ
Î
132.F
45<-T7->132

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Display of the temperature of the energy sink sensor in the
"Information" menu, with minimum and maximum values. The
corresponding measuring point – here T8 – is also displayed.
Display of the functional status in the "Information" menu.
The 3rd line displayed on the screen shows the active ancillary
features – here "Diff. regl.".
7 U SER MENUS
Notice!
Damage to the unit or malfunctions in the event of incorrect
settings in the menu.
Make sure that only qualified specialist electricians open and
work with the "Manual mode", "Basic setting"
or “System setting”
menus.
To make the device as easy as possible to
operate, all device, user and display
functions have been divided into 4 groups
(i.e. main menus).
Depending on which system setup and
supplementary features have been
selected, submenus will also be available
within these main menus.
The four menus
•Info
•Programming
•Manual Operation
•System Settings
will either display information about your
solar equipment or will let you enter system
parameters.
The menu currently active is indicated by
the corresponding icon displayed in the top
row of the screen.
Diff. regl. L
100.F
22<-T8->100

6
Function
active
Diff. regl.

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7.1 Overview: menu layout
Menu Overview of available functions
Info Main menu for automated control of the solar equipment.
• Displays current readings
• Displays the system status
• Displays error messages
• Displays hours of operation and energy output (if available)
Programming Alteration/configuration of programmable settings (parameters)
Notice: Changes can compromise system functionality. Settings and
changes here should only be carried out by technicians!
Manual Operation Manual activation and deactivation of attached pumps / valves
Notice: Changes can compromise system functionality. Settings and
changes here should only be carried out by technicians!
System Settings Information about basic settings controlling system functionality.
End users can view – but not change – these parameters.
Notice: Changes can compromise system functionality. Settings and
changes here should only be carried out by technicians!
Available submenus, depending on the unit model:
Select basic layout
Select language
Collector protection
Recooling
System protection
Frost protection
Type 1-3 tube collector feature
Output measurement
Multi-function regulator
Heating
Cooling
Threshold switch
Increased return flow
Wood boiler feature
Difference regulator
Circulation
Alarm
Timer