Sorel TDC 4 User manual

SOREL TDC 4
Temperature-Difference-Controller
Temperature Difference Controller TDC 4
Installation and operating instructions
Read carefully before installation, commissioning and operation

2
Contents
Safety instructions
1.1 EC conformity
1.2 General instructions
1.3 Explanation of symbols
1.4 Changes
1.5 Warranty
1
3
3
3
4
4
Description of controller
2.1 Specications
2.2 About the controller
2.3 Scope of supply
2.4 Disposal of pollutants
2.5 Hydraulic variants
2
5
6
6
6
7
Operation
4.1 Display and input
4.2. Menu sequence
4
26
27
Parametrisation
5.1 Commissioning help
5.2 Free commissioning
5
28
28
Measurement menu 1
values
629
Statistics menu 2
7.1 Operating hours
7.2 Average ∆T
7.3 Heat output
7.4 Graphic overview
7.5 Error messages
7.6 Reset/clear
7
30
30
30
30
30
30
Display mode menu 3
8.1 Schematic
8.2 Overview
8.3 Alternating
8
31
31
31
Menu lock menu 8
13 46
Language menu10
14 46
Malfunctions/mainte-
nance
16.1 Error messages
16.2 Replacing the fuse
16.3 Maintenance
16
48
49
49
Installation
3.1 Wall installation
3.2 Electrical connection
3.3 Installing the sensors
3
8
9-24
25
38
38
39
40
40
Special functions menu 7
12.1 Program selection
12.2 Time & date
12.3 Sensor calibration
12.4 Commissioning
12.5 Factory settings
12.6 Expansions
12.7 Heat metering
12.8 Start aid
12.9 Speed control
12
41
41
41
42
42
42
43
43
44-45
Settings menu 5
10.1-10.3 Tmin...
10.4-10.5 Tmax...
10.6-10.7 ∆T...
10.8-10.9 Tsetpoint,
hysteresis
10.10-10.13 Priority....
10.14 Table/overview
10
33
34
34-35
35
36
37
Useful notes
17 50-51
Operating modes menu 4
9.1 Automatic
9.2 Manual
9.3 Off
932
32
32
Service values menu 9
15 47
Chapter
Protective functions menu 6
11.1 Seizing protection
11.2 Frost protection
11.3 Solar protection
11.4 Recooling
11.5 Anti-Legionella
11
ChapterPage Page

3
1.1 EC declaration of conformity
By afxing the CE mark to the unit the manufacturer declares that the TDC 4
conforms to the following relevant safety regulations:
- EC low voltage directive
73/23/EEC, as amended by 93/68/EEC
- EC electromagnetic compatibility directive
89/336/EEC version 92/31/EEC version 93/68/EEC
Conformity has been veried and the corresponding documentation and
the EC declaration of conformity are kept on le by the manufacturer.
1.2 General instructions It is essential that you read this!
These installation and operating instructions contain basic instructions
and important information regarding safety, installation, commissioning,
maintenance and the optimal use of the unit. Therefore these instructions
must be read completely and understood by the installation technician/
specialist and by the system user before installation, commissioning and
operation of the unit.
The valid accident prevention regulations, VDE regulations, the regula-
tions of the local power utility, the applicable DIN-EN standards and the
installation and operating instruction of the additional system components
must also be observed. The controller does not under any circumstances
replace any safety devices to be provided by the customer!
Installation, electrical connection, commissioning and maintenance of the
unit may only be carried out by specialists who possess the appropriate
training.
For the user: Make sure that the specialist gives you detailed information on
the function and operation of the controller. Always keep these instructions
in the vicinity of the controller.
1.3 Explanation of symbols
Failure to observe these instructions can result in danger to life
from electric voltage.
Danger
Danger
Failure to observe these instructions can result in serious damage
to health such as scalding, or even life-threatening injuries.
Caution
Failure to observe these instructions can result in destruction of
the unit or the system, or damage to the environment.
Caution
Information which is especially important for the function and
optimal use of the unit and the system.
Safety instructions
1 1

4
Safety instructions
1 1
1.4 Changes to the unit
1.5 Warranty and liability
The controller has been manufactured and tested with regard to high quality
and safety requirements. The unit is subject to the statutory guarantee period
of two years from the date of sale.
The warranty and liability shall not include, however, any injury to persons
or material damage that is attributable to one or more of the following
causes:
- Failure to observe these installation and operating instructions
- Improper installation, commissioning, maintenance and operation
- Improperly executed repairs
- Unauthorised structural changes to the unit
- Installation of additional components that have not been tested
together with the unit
- Any damage resulting from continued use of the unit despite an
obvious defect
- Failure to use original spare parts and accessories
- Use of the device for other than its intended purpose
- Operation above or below the limit values listed in the specications
- Force majeure
- Changes, additions to or conversion of the unit are not permitted
without the written permission from the manufacturer
- It is likewise forbidden to install additional components that have not
been tested together with the unit
- If it becomes clear that safe operation of the unit is no longer possible,
for example because of damage to the housing, then turn the controller
off immediately
- Any parts of the unit or accessories that are not in perfect condition
must be exchanged immediately
- Use only original spare parts and accessories from the manufacturer.
- Markings made on the unit at the factory must not be altered,
removed or made illegible
- Only the settings actually described in these instructions may be made
on the controller
Danger
Changes to the unit can compromise the safety and function of the
unit or the entire system.

5
Description of controller
2 2
2.1 Specifications
Electrical specifications:
Mains voltage 230VAC +/- 10%
Mains frequency 50...60Hz
Power consumption 2VA
Switched power
Electronic relay R1 min.20W...max.120W for AC3
Mechanical relay R2 460VA for AC1 / 185W for AC3
Internal fuse 2A slow-blow 250V
Protection category IP40
Protection class II
Sensor inputs 3 x Pt1000, 1xVortex Flow sensor
Measuring range PT1000 -40°C up to 300°C
Measuring range VFS 0°C-100°C(-25°C/120°C short term)
2l/min -40 l/min (VFS2-40)
Permissible ambient conditions:
Ambient temperature
for controller operation 0°C...40°C
for transport/storage 0°C...60°C
Air humidity
for controller operation max. 85% rel. humidity at 25°C
for transport/storage no moisture condensation permitted
Other specifications and dimensions
Housing design 2-part, ABS plastic
Installation methods Wall installation, optionally panel installation
Overall dimensions 163mm x 110mm x 52mm
Aperture installation
dimensions 157mm x 106mm x 31mm
Display Fully graphical display, 128 x 64 dots
Light diode Multicolour
Operation 4 entry keys
Temperature sensors: (may not be included in the scope of supply)
Collector or boiler sensor Pt1000, e.g. immersion sensor TT/S2 up to 180°C
Storage tank sensor Pt1000, e.g. immersion sensor TT/P4 up to 95°C
Pipe-mounted sensor Pt1000, e.g. pipe-mounted sensor TR/P4 up to 95°C
Vortex ow sensor ow and temperature measuring
Sensor leads PT1000:2x0.75mm² extendable up to 30m max.
VFS: prolongable to 3 m max.
Temperature resistance table for Pt1000 sensors
°C 0 10 20 30 40 50 60 70 80 90 100
Ω 1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385

6
2.2 About the controller
The Temperature Difference Controller TDC 4 facilitates efcient use and
function control of your solar or heating system. The device is impressive
most of all for its functionality and simple, almost self-explanatory operation.
For each step in the input process the individual entry keys are assigned to
appropriate functions and explained. The controller menu contains headwords
for the measured values and settings, as well as help texts or clearly-structured
graphics.
The TDC 4 can be used as a temperature difference controller for the various
system variants illustrated and explained under 2.5.
Important characteristics of the TDC 4:
- Depiction of graphics and texts in a lighted display
- Simple viewing of the current measurement values
- Heat metering
- Analysis and monitoring of the system by means of statistical graphics,etc.
- Extensive setting menus with explanations
- Menu block can be activated to prevent unintentional setting changes
- Resetting to previously selected values or factory settings
- A wide range of additional functions are available
Description of controller
2 2
2.3 Scope of supply
- Temperature Difference Controller TDC 4
- 3 screws 3,5x35mm and 3 plugs 6mm for wall installation
- 6 strain relief clips with 12 screws, replacement fuse 2A slow-blow
- Installation and operating instructions TDC 4
- Vortex ow sensor VFS2-40, with 2x 3/4 inch screw connection and 1.2m
cable (also available VFS1,2-20l/min and VFS5-100l/min)
Optionally contained depending on design/order:
- 2-3 PT1000 temperature sensors and immersion sleeves
Additionally available:
- Pt1000 temperature sensor, immersion sleeves, overvoltage protection
- Various additional functions by means of supplementary circuit boards
2.4 Disposal and pollutants
The unit conforms to the European RoHS directive 2002/95/EC for the
restriction of the use of certain hazardous substances in electrical and
electronic equipment.
Caution
The unit must not under any circumstances be disposed of with
ordinary household refuse. Dispose of the unit only at appropriate
collection points or ship it back to the seller or manufacturer.

7
Description of controller
2 2
2.5 Hydraulic variants
The following illustrations should be viewed only as schematic
diagrams showing the respective hydraulic systems, and do not
claim to be complete. The controller does not replace safety de-
vices under any circumstances.
Depending on the specic application, additional system components and
safety components may be mandatory, such as check valves, non-return
valves, safety temperature limiters, scalding protectors, etc., and must
therefore be provided.
Caution
13
5
2
4
7
10
13
6
8 9
11 12
14 (∆T controller) 15 (2x∆T controller)
∆T2x∆T

8
3.1 Wall installation
Installation
3 3
Caution
Install the controller only in dry areas and under the ambient condi-
tions described under 2.1 “Specications”. Carry out the following
steps 1-8.
A
Fig. 3.1.1
Fig. 3.1.2
1. Unscrew cover screw completely
2. Carefully pull upper part of hou-
sing from lower part.
3. Set upper part of housing aside,
being sure not to touch the elect-
ronics when doing so.
4. Hold the lower part of the hou-
sing up to the selected position
and mark the 3 mounting holes.
Make sure that the wall surface
is as even as possible so that
the housing does not become
distorted when it is screwed on.
5.Using a drill and size 6 bit, drill 3
holes at the points marked on the
wall and push in the plugs
6. Insert the upper screw and screw
it in slightly.
7. Fit the upper part of the housing
and insert the other two screws.
8. Align the housing and tighten the
three screws.

9
Installation
3 3
3.2 Electrical connection
Before working on the unit, switch off the power supply and secure
it against being switched on again! Check for the absence of power!
Electrical connections may only be made by a specialist and in
compliance with the applicable regulations.
Do not use the controller if the housing shows visible damage.
Caution
Danger
Low-voltage cables such as temperature sensor cables must be
routed separately from mains voltage cables.
Feed temperature sensor cables only into the left-hand side of the
unit, and mains voltage cables only into the right-hand side.
Caution
Caution
Fig. 3.2.1
Caution
The customer must provide an all-pole disconnecting device, e.g.
a heating emergency switch.
The cables being connected to the unit must not be stripped by
more than 55mm, and the cable jacket must reach into the housing
just to the other side of the strain relief.
Relay R1 is only suitable for standard pumps (20-120VA) which
are speed-controlled viathe controller. The internal wiring of the
controller is such that residual currents ow over relay R1 even in
the rest condition. Therefore under no circumstances may valves,
contactors or other consumers with low power consumption be
operated on this output.
1. Select necessary program/
hydraulics (Fig. 3.2.2-3.2.16)
2. Open controller as described
under 3.1.
3. Strip cables by 55mmmax., insert,
t the strain relief devices, strip
the last 8-9mm of the wires.(Fig.
3.2.1)
4. Open the terminals using a suitable
screwdriver (Fig. 3.2.1) and make
electrical connections on the con-
troller (Pages 10-17)
5. Ret upper part of housing and fas-
ten with screw.
6. Switch on mains voltage and place-
controller in operation.

10
Installation
3 3
3.2 Electrical connection (continued)
Fig. 3.2.2 “Solar with storage tank”
Terminal connection diagram, program 1
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage
S3 Sensor 3 (optional)
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Caution
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump L (speed)
N Pump N
R2 Pump L (no speed)
N Pump N
The PE protective conductor must
be connected to the PE metal terminal
block!
Relais R1: Only for speed control
of standard pumps, minimum
load 20 VA
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.

11
Terminal connection diagram, program 2
Fig. 3.2.3 “Solar + Thermostat”
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump L (speed)
N Pump N
R2 Thermostat function L
N Thermostat function N
The PE protective conductor must
be connected to the PE metal terminal
block!
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage
S3 Sensor 3 (optional)
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Relais R1: Only for speed control
of standard pumps, minimum
load 20 VA
Installation
3 3
3.2 Electrical connection (continued)

12
Installation
3 3
3.2 Electrical connection (continued)
Fig. 3.2.4 “Solar with bypass”
Terminal connection diagram, program 3
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Caution
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump L (speed)
N Pump N
R2 Valve phase L
N Valve bypass N
Actuating direction of valve:
R2 on/valve on = bypass
without storage tank charging
The PE protective conductor must
be connected to the PE metal terminal
block!
Relay R1: For speed control
of standard pumps, minimum
load 20VA
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage
S3 Sensor 3 bypass ow
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.

13
Fig. 3.2.5 “Solar with return lift”
Terminal connection diagram, program 4
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Caution
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump L (speed)
N Pump N
R2 Valve L
N Valve N
Actuating direction of valve:
R2 on/valve on = flow through the
storage
The PE protective conductor must
be connected to the PE metal terminal
block!
Relay R1: For speed control
of standard pumps, minimum
load 20VA
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage
S3 Sensor 3 heating circuit
return
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.
Installation
3 3
3.2 Electrical connection (continued)

14
3.2 Electrical connection (continued)
Installation
3 3
Fig. 3.2.6 “Solar with 2 zone storage tanks”
Terminal connection diagram, program 5
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Caution
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump L (speed)
N Pump N
R2 Zone valve L
N Zone valve N
The PE protective conductor must
be connected to the PE metal terminal
block!
Relay R1: For speed control of standard
pumps, minimum load 20VA
Actuating direction of valve:
R2 on/valve on = charge to
sensor 3 (storage tank above)
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage above
S3 Sensor 3 storage below
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.

15
Terminal connection diagram, program 6
Fig. 3.2.7 “Solar with ext. heat exchanger”
Caution
Relay R1: Only for speed con-
trol of standard pumps, mini-
mum load 20VA
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump, secondary L (speed)
N Pump, secondary N
R2 Pump, primary L
N Pump, primary N
The PE protective conductor must
be connected to the PE metal terminal
block!
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage
S3 Sensor 3 forward ow 1st
S4 Sensor 4 forward ow 2nd
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Installation
3 3
3.2 Electrical connection (continued)

16
Installation
3 3
3.2 Electrical connection (continued)
Fig. 3.2.8 “Solar 2 coll. (east/west)”
Terminal connection diagram, program 7
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Caution
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump L (speed)
N Pump N
R2 Change-over valve L
N Change-over valve N
The PE protective conductor must
be connected to the PE metal terminal
block!
Relay R1: For speed control of standard
pumps, minimum load 20VA
Actuating direction of valve:
R2 on/valve on = collector with
ow through sensor 3
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage above
S3 Sensor 3 collector 2
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.

17
Terminal connection diagram, program 8
Fig. 3.2.9 “Solar 2 coll. 2 pumps”
Caution
Relay R1: Only for speed con-
trol of standard pumps, mini-
mum load 20VA
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump (coll. 1) L (speed)
N Pump (coll. 1) N
R2 Pump (coll. 2) L
N Pump (coll. 2) N
The PE protective conductor must
be connected to the PE metal terminal
block!
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage above
S3 Sensor 3 collector 2
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.
Installation
3 3
3.2 Electrical connection (continued)

18
Fig 3.2.10 “Solar 2 Storage tank/valve”
Terminal connection diagram, program 9
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Caution
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump L (speed)
N Pump N
R2 Change-over valve L
N Change-over valve N
The PE protective conductor must
be connected to the PE metal terminal
block!
Relay R1: For speed control of standard
pumps, minimum load 20VA
Actuating direction of valve:
R2 on/valve on = charge to
sensor 3 (storage tank 2)
3.2 Electrical connection (continued)
Installation
3 3
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage 1
S3 Sensor 3 storage 2
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.

19
Terminal connection diagram, program 10
Fig. 3.2.11 “Solar 2 storage tank/2 pu.”
Caution
Relay R1: Only for speed con-
trol of standard pumps, mini-
mum load 20VA
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump (St.1) L (speed)
N Pump (storage tank 1) N
R2 Pump (storage tank 2) L
N Pump (storage tank 2) N
The PE protective conductor must
be connected to the PE metal terminal
block!
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage 1
S3 Sensor 3 storage 2
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.
Installation
3 3
3.2 Electrical connection (continued)

20
3.2 Electrical connection (continued)
Installation
3 3
Fig. 3.2.12 “Solar with follow-on storage tank/
Solar & Transfer“
Terminal connection diagram, program 11
Sensor side
max. 12V
Danger
Caution
Mains side
230VAC
Mains voltages230VAC 50-60Hz
Connection in the right-hand terminal
compartment!
Terminal: Connection for:
L Mains phase conductor L
N Mains neutral conductor N
R1 Pump L (speed)
N Pump N
R2 Pump (storage tank 2) L
N Pump (storage tank 2) N
The PE protective conductor must
be connected to the PE metal terminal
block!
Caution
Relay R1: Only for speed con-
trol of standard pumps, mini-
mum load 20VA
Low voltage max. 12VAC/DC connec-
tion in the left-hand terminal compart-
ment!
Terminal: Connection for:
S1 Sensor 1 collector
S2 Sensor 2 storage 1
S3 Sensor 3 storage 2
S4 Sensor 4 ow
S5 VFS return °C
(yellow)
S6 VFS ow l/min
(white)
+ VFS +5V DC
(brown)
- jumper terminal block-
Connection of sensor earths (S1-S4)
and VFS (green) earth via terminal
block sensor-
The polarity of the sensors S1 to S4 is
freely selectable.
Caution
Vortex ow sensor installation
advice
To prevent damage to the Vortex ow
sensor it is strongly recommended to
install the sensor in the return! (see also
12.7 heat metering)
The VFS has to be installed in the cor-
rect ow direction!
For additional advice regarding the sen-
sors and the VFS see 3.3 „Installating
the temperature sensors“ on page 25.