Samson TROVIS 5757-7 Service manual

Controller with Electric Actuator
Type 5757-7
for heating and cooling applications
Mounting and
Operating Instructions
EB 5757-7 EN
Firmware version 2.00
Edition July 2009
Fig. 1 · Type 5757-7 Controller with Electric Actuator

2EB 5757-7 EN
DANGER!
DANGER indicates a hazardous situation
which, if not avoided, will result in death or
serious injury.
WARNING!
WARNING indicates a hazardous situation
which, if not avoided, could result in death or
serious injury.
NOTICE
NOTICE indicates a property damage
message.
Note: Supplementary explanations,
information and tips
Definitions of the signal words used in these instructions

Contents Page
1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 5
2 Design and principle of operation . . . . . . . . . . . . . . . . . . . 6
2.1 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 LED blinking pattern . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Connection to the valve . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Mounting position. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Dimensions in mm . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1 Outdoor temperature compensated control . . . . . . . . . . . . . . . 17
6.1.1 Override using potentiometer . . . . . . . . . . . . . . . . . . . . . 19
6.1.2 Summer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1.3 Delayed outdoor temperature adaptation. . . . . . . . . . . . . . . . 20
6.2 Fixed set point control . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.1 Control with reference variable (room temperature) . . . . . . . . . . . 21
6.3 Changing the operating modes . . . . . . . . . . . . . . . . . . . . 22
6.3.1 Switchover via binary input . . . . . . . . . . . . . . . . . . . . . . 22
6.3.2 Switchover via room panel . . . . . . . . . . . . . . . . . . . . . . 23
6.3.3 Switchover via binary input in room panel . . . . . . . . . . . . . . . 24
6.4 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.5 Return flow temperature limitation . . . . . . . . . . . . . . . . . . . 24
6.6 Pump forced operation . . . . . . . . . . . . . . . . . . . . . . . . 25
6.7 External request for heat demand . . . . . . . . . . . . . . . . . . . 25
6.8 Control principle . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.9 Direction of action. . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.10 Manual operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.10.1 Handwheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.10.2 Command mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.10.3 Function block F13 for manual operation. . . . . . . . . . . . . . . . 28
6.10.4 Manual level in TROVIS-VIEW . . . . . . . . . . . . . . . . . . . . . 28
7 Configuration and operation using TROVIS-VIEW interface . . . . . . 30
7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.1.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.2 Installing TROVIS-VIEW software . . . . . . . . . . . . . . . . . . . 31
7.3 Starting TROVIS-VIEW and performing settings . . . . . . . . . . . . 32
3EB 5757-7 EN
Contents

7.4 Changing the user level . . . . . . . . . . . . . . . . . . . . . . . . 34
7.5 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.5.1 Activating/deactivating functions . . . . . . . . . . . . . . . . . . . 35
7.5.2 Setting parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.6 Reading operation data . . . . . . . . . . . . . . . . . . . . . . . . 37
7.7 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.7.1 Additional diagnostics folders in
Specialist user level . . . . . . . . . . 39
7.7.2 Operational data graph (Trend Viewer) . . . . . . . . . . . . . . . . 41
8 Data transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.1 Data transmission between TROVIS-VIEW and the actuator
(connecting cable). . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8.1.1 Offline operation (indirect data transmission) . . . . . . . . . . . . . . 45
8.1.2 Online operation (direct data transmission). . . . . . . . . . . . . . . 45
8.2 SAMSON memory pen . . . . . . . . . . . . . . . . . . . . . . . . 46
8.2.1 Data transfer between TROVIS-VIEW and memory pen . . . . . . . . . 46
8.2.2 Data transmission between actuator and memory pen. . . . . . . . . . 47
8.2.3 Copy function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.2.4 Command mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.3 Data logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.4 Functional test assistant . . . . . . . . . . . . . . . . . . . . . . . . 51
9 Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.1 Function block list . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.2 Parameter list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.3 Resistance values with Pt 1000 resistors . . . . . . . . . . . . . . . . 54
9.4 Customer settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
4EB 5757-7 EN
Contents
Note: These Mounting and Operating Instructions EB 5757-7 EN are valid for firmware ver-
sions 2.00 to 2.09.
The latest edition of these instructions, detailing the firmware version and modifications com-
pared to the previous version, is available on the Internet at http://www.samson.de.

1 General safety instructions
For your own safety, follow these instructions concerning the mounting, start up and opera-
tion of the actuator:
4Mounting, start-up and operation of this device may only be performed by trained and
experienced personnel familiar with the product.
According to these Mounting and Operating Instructions, trained personnel refers to
individuals who are able to judge the work they are assigned to and recognize possible
hazards due to their specialized training, their knowledge and experience as well as their
knowledge of the applicable standards.
4Any hazards that could be caused by the process medium, operating pressure or by
moving parts are to be prevented by means of the appropriate measures.
4The actuators has been designed for use in low voltage installations.
For wiring and maintenance, you are required to observe the relevant safety regulations.
Take necessary measures to ensure that the power supply cannot be reconnected
inadvertently.
4Before wiring the controller with electric actuator, disconnect it from the power supply.
To avoid damage to any equipment, the following also applies:
4Proper shipping and appropriate storage are assumed.
Note: Actuators with a CE marking fulfill the requirements of the Directives 2004/108/EC
and 2006/95/EC.
The Declaration of Conformity is available on request.
EB 5757-7 EN 5
General safety instructions

2 Design and principle of
operation
The Type 5757-7 consists of a digital con-
troller integrated into the housing of an elec-
tric actuator.
The combination is especially designed for
heating applications as well as for fixed set
point control of heating systems in small to
medium-sized buildings. It is particularly
suitable for mounting to SAMSON
Type 3222, Type 3222 N, Type 2488 and
Type 3267 Valves (DN 15 to 25) and to
special versions of Type 3226 and
Type 3260 Valves.
The digital controller is connected to a flow
sensor on the input side, which can be op-
tionally upgraded by a return flow, outdoor
or room sensor.
In addition to the Pt 1000 input, the digital
controller has a potentiometer input (1000
to 1100 Ωor 1000 to 2000 Ω) to measure
the flow temperature. This input influences
the heating characteristic in the case of out-
door temperature compensated control and
the room temperature set point in the case of
fixed set point control with room tempera-
ture influence.
Heating characteristic and set point parame-
ters can be changed over the TROVIS-VIEW
Operator Interface.
The output signal of the integrated digital
controller is applied as a three-point step-
ping signal to the synchronous motor of the
actuator. The signal is transferred over the
connected gear to the actuator stem (3) and
used as the positioning force.
The motor is switched off by torque switches
when an end position is reached or in case
the motor is overloaded. The actuator is
mounted onto the valve using a coupling nut
(4).
When the actuator stem extends, the valve is
closed, opposing the force of the valve
spring (7). When the actuator stem retracts,
the valve is opened as the plug stem (6) fol-
lows the motion of the return spring.
The valve can be moved to any position by
the handwheel (2) when the power supply
is disconnected. Travel and direction of ac-
tion can be read off the travel indicator (5)
on the side of the actuator housing.
6EB 5757-7 EN
Design and principle of operation
182
4
3
6
7
5
1.1
Fig. 2 · Functional diagram
Stem retracts
Stem extends 5
1 Controller with
electric actuator
1.1 Connecting lead
2 Handwheel (only use
when power is dis-
connected)
3 Actuator stem
4 Coupling nut
5 Travel indicator
6 Plug stem
7 Valve spring
8 Cover, serial
interface connection,
slide switch and LEDs

Slide switch
The slide switch allows you to switch be-
tween two different configurations #1 and
#2. In position #1, the slide switch points to-
wards the outside of the housing and in po-
sition #2 towards the middle of the housing.
In both levels #1 and #2, the functions de-
scribed in section 6 can be activated and
the associated parameter settings made.
The default settings is the same for both lev-
els #1 and #2, except for function block
F13.
Changes to functions and parameters can
be made over the TROVIS-VIEW software.
Refer to section 7.
The position of the slide switch determines
which function and parameter settings (level
#1 or #2) is used for closed loop operation.
2.1 Accessories
Heating applications, see section 6
4Type 5267-2 Pt 1000 Contact Sensor
Permissible temperatures:
Medium –20 to 120 °C
Ambient –20 to 120 °C
Degree of protection IP 42
4Type 5257-2 Pt 1000 Room Sensor
with potentiometer (remote adjuster)
Permissible temperatures:
Medium –35 to 70 °C
Ambient –35 to 70 °C
Degree of protection IP 20
4Type 5257-7 Room Panel with
potentiometer and mode selector switch
Permissible temperatures:
Medium –20 to 60 °C
Ambient –20 to 60 °C
Degree of protection IP 30
4Type 5227-2 Pt 1000 Outdoor Sensor
Permissible temperatures:
Medium –35 to 85 °C
Ambient –35 to 85 °C
Degree of protection IP 44
Communication, refer to section 7
4TROVIS-VIEW Configuration and Opera-
tor Interface for Type 5757-7 Controller
with Electric Actuator
4Hardware package
Accessories for direct and indirect data
transmission (including a memory pen
(1400-7697), connecting cable and
modular adapter), order no. 1400-7704
4Memory pen
Indirect data transmission,
order no. 1400-7697
EB 5757-7 EN 7
Design and principle of operation
Fig. 3 · Location of the slide switch
Slide switch (red)

4Memory pen – 64
For indirect data transmission and data
logging, order no. 1400-9753
2.2 Technical data
Type 5757-7 Controller with Electric Actuator
Temperature sensor Max. 3 x Pt 1000
Measuring range –40 to 150 °C
Binary inputs
BE1 (instead of
potentiometer) Floating contact
BE2 (instead of
return flow sensor Floating contact
Potentiometer input 1000 to 1100 Ωor
1000 to 2000 Ω
Switching output 230 V/50 Hz/1 A
Circulation pump or
external heat demand
Rated travel 6 mm
Transit time for
rated travel 20 s
Nominal thrust 300 N
Supply voltage 230 V (±10 %) / 50 Hz
Power consumption Approx. 3 VA
Class of protection II
Permissible temperatures
Ambient 0 to 50 °C
Storage –20 to 70 °C
Degree of protection IP 42
Mounting position Any, but not suspended
Noise immunity EN 61000-6-2
Noise emission EN 61000-6-3
Weight Approx. 0.7 kg
2.3 LED blinking pattern
The device has a red and a yellow LED
which indicate the operating states of the
device.
The LEDs are located underneath the cover
on top of the circuit board.
Blinking pattern of the yellow LED
• Device switched off or command mode:
• Device switched on or memory pen ac-
tion completed:
• Active return flow temperature limitation
or validity error in memory pen:
• Preparing to read data from memory
pen:
8EB 5757-7 EN
Design and principle of operation
ON
OFF Time [s]
ON
OFF Time [s]
ON
OFF Time [s]
ON
OFF Time [s]

• Preparing to write data to memory pen:
• Preparing data logging:
• Data logging in progress:
• EEPROM error in memory pen:
Blinking pattern of the red LED
• Device switched off, normal operation or
command mode:
• Device is starting up or limit switch error:
• Exceptional error or sensor line break-
age:
• EEPROM error in device:
• Stem synchronization:
EB 5757-7 EN 9
Design and principle of operation
ON
OFF Time [s]
ON
OFF Time
[
s
]
ON
OFF Time [s]
ON
OFF Time [s]
ON
OFF Time [s]
ON
OFF Time [s]
ON
OFF Time [s]
ON
OFF Time [s]
ON
OFF Time [s]

• Internal transit time measurement:
• Flow sensor defective:
• Outdoor/room sensor defective:
• Return flow sensor defective:
• Potentiometer defective:
3 Connection to the valve
The actuator has a force-locking connection
to the valve in de-energized state.
4Turn the handwheel (2) counterclockwise
to retract the actuator stem as far as it
will go.
4Place the actuator on the valve connec-
tion and screw coupling nut (4) tight
(tightening torque 20 Nm).
3.1 Mounting position
Any mounting position may be used, how-
ever, the actuator may not be installed in a
suspended position.
10 EB 5757-7 EN
Connection to the valve
2 Handwheel
3 Actuator stem
4 Coupling nut
ON
OFF Time [s]
ON
OFF Time [s]
ON
OFF Time [s]
3
2
4
Fig. 4 · Mounting the actuator onto the valve
OFF
ON
Time [s]
ON
OFF Time [s]

4 Electrical connection
Risk of electric shock!
When installing electric lines, you
are required to observe the regula-
tions governing electrical power
plant installation according to
DIN VDE 0100 as well as the regu-
lations of your local power supply
company.
Use a suitable power supply which
guarantees that no dangerous volt-
ages reach the device in normal op-
eration or in case of a fault in the
system or any other system parts.
Connect the actuator to the electrical
network only after the power supply
is first switched off. Make sure the
power cannot be switched on unin-
tentionally!
The pump output L’ is non-floating
(230 V~).
The controller with electric actuator requires
a Pt 1000 temperature sensor (e.g. Type
5267-2) to be connected to measure the
flow temperature.
Depending on the control task, an outdoor
sensor (e.g. Type 5227-2) or a room sensor
(e.g. Type 5257-2) or a room panel
(Type 5257-7 only) can be connected. Com-
bining one of these sensors with a return
flow sensor (e.g. Type 5267-2) is usually
possible.
Additionally, the controller with electric ac-
tuator has a potentiometer input 1000 to
1100 Ω(e.g. Type 5257-7) or 1000 to
2000 Ω(e.g. Type 5257-2). This input is
used to correct the room set point (±5 K) in
case of fixed set point control with room
temperature influence (see section 6.2). On
using an outdoor sensor, it can change the
adjusted heating characteristic (see sec-
tion 6.1).
The non-floating switching output can alter-
natively be used as an output for an external
request for heat demand.
The connected sensors are monitored for
line breakages.
A fault in the line of a sensor is indicated by
the red LED blinking (underneath the cover
on top of the circuit board). Each sensor has
its own blinking pattern (see section 2.3).
In the event that several sensors are
defective, the LED blinks using the sequence
for the sensor with the highest priority:
Highest priority Flow sensor
Outdoor sensor or
room sensor
Return flow sensor
Lowest priority Potentiometer
Example: In the event that the flow sensor
and outdoor sensor are defective, the LED
initially blinks to indicate that the flow sen-
sor is defective. When this fault is elimina-
ted, the LED then blinks to indicate that the
outdoor sensor is defective.
EB 5757-7 EN 11
Electrical connection

Perform the electrical connection depending
on the heating application according to one
of the following wiring diagrams (Figs. 5
and 6).
As soon as the actuator is connected to the
power supply, the initialization procedure
starts.
The actuator stem extends and the red and
yellow LEDs are illuminated located under
the cover on top of the circuit board.
As soon as the actuator stem has reached
the final position, the red LED is turned off.
The yellow LED remains illuminated and in-
dicates that the controller with electric actua-
tor is ready for operation.
12 EB 5757-7 EN
Electrical connection
or ye rd br blk gr br bl blk
34 6521LL´N
230 V,
VS
Pt 1000 Pt 1000 Pt 1000
ASRüS 50 Hz
100/
1000 Ω
1000 Ω
Application with flow sensor, return flow sensor, outdoor sensor and potentiometer
for adjusting the set point
Caution!
Live wires
or orange
ye yellow
rd red
br brown
blk black
gr green
br brown
bl blue
blk black
Fig.5·Wiring diagrams Note: Terminals at point of installation, not included in scope of delivery
e.g. Type 5257-2 with remote adjuster

EB 5757-7 EN 13
Electrical connection
or ye rd br blk gr br bl blk
34 6521LL´N
230 V,
VS
Pt 1000 Pt 1000 Pt 1000
AS BE1RüS 50 Hz
Application with flow sensor, return flow sensor and outdoor sensor as well as binary input (BI1)
to switch between operating modes
or ye rd br blk gr br bl blk
34 6521LL´N
230 V,
VS
Pt 1000 Pt 1000
AS 50 Hz
100/
1000 Ω
1000 Ω
BE2
Application with flow sensor, outdoor sensor, binary input (BI2) to switch between operating modes
and potentiometer for adjusting the set point
or orange
ye yellow
rd red
br brown
blk black
gr green
Fig. 6 · Wiring diagrams Note: Terminals at point of installation, not included in scope of delivery
Caution!
Live wires
Caution!
Live wires
br brown
bl blue
blk black

14 EB 5757-7 EN
Electrical connection
Fig.7·Wiring diagrams Note: Terminals at point of installation, not included in scope of delivery
or ye rd br blk gr br bl blk
34 65
1432
21LL´N
230 V, 50 Hz
VS
Pt 1000 Pt 1000
RüS
Application with flow sensor, return flow sensor and room sensor with mode selector switch
and set point adjuster
Type 5257-7
Room Panel
or orange
ye yellow
rd red
br brown
blk black
gr green
or ye rd br blk gr br bl blk
34 6521LL´N
230 V, 50 Hz
VS
Pt 1000 Pt 1000
AS
BE2 BE1
Application with flow and outdoor sensors
Caution!
Live wires
Caution!
Live wires
br brown
bl blue
blk black

5 Dimensions in mm
EB 5757-7 EN 15
Dimensions in mm
Ø 12
55
80
11
32 70 eL Stem retracts
aL Stem extends
114
2.5 m
70
Fig. 8 · Type 5757-7 Controller with Electric Actuator

16 EB 5757-7 EN
Dimensions in mm
Fig. 9 · Accessories for heating applications
50
2
32
30
Type 5267-2 Contact
Sensor, Pt 1000
(flow and return flow
temperature measurement)
21
Ø4
50
36
75
60
22
28
Type 5227-2 Outdoor Sensor,
Pt 1000
Color: RAL 9016
84
+
_
23
84
Type 5257-2 Room Sensor, Pt 1000
(remote adjustment)
Color: RAL 9010
Continuous day mode (rated operation)
Continuous night mode (reduced operation)
Off/frost protection
82 32
20
86
Type 5257-7 Room Panel, Pt 1000
Color: Cover and knobs RAL 9016 · Base RAL 7047

6 Functions
Functions and parameters are entered in the TROVIS-VIEW Operator Interface separately for
level #1 and level #2 (see section 7).
6.1 Outdoor temperature compensated control
In the outdoor temperature compensated control, the flow temperature (tVL) is automatically
adjusted in relationship to the outdoor temperature (tA). The heating characteristic in the con-
troller defines the set point for flow temperature as a function of the outdoor temperature
(Fig. 10).
Basically, the following correlation exists: If the outdoor temperature drops, the flow temper-
ature rises. By varying the
Gradient and Level parameters, the characteristic can be adapted
to individual requirements: An increased
Gradient causes an increase in flow temperature,
whereas a reduced
Gradient causes a lower flow temperature. The Level parameter shifts the
heating characteristic parallel upwards or downwards.
In reduced operation, the flow temperature is reduced by the amount set in
Flow temperature
set-back in reduced operation. The Max. flow temperature
and Min. flow temperatur e pa-
rameters limit the flow temperature range. Return flow temperature limitation (see section
6.5) is an exception as it can reduce the flow temperature without restriction down to 20 °C
flow temperature set point.
EB 5757-7 EN 17
Functions
20
30 0.2
2.4
2.62.93.2
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.4
0.6
40
50
60
70
80
90
100
110
120
130
t
VL
[
˚
C]
-20 [
˚
C]
t
A
-16-12-8-4048121620
Fig. 10 · Heating characteristics
tVL Flow temperature
tAOutdoor temperature

Functions WE Configuration
F01 – Control mode 1 F01 - 1
F02 – Selecting the reference variable 0 F02 - 0
Parameters WE Range of values
P02 – Flow temperature set-back in reduced
operation 15 K 0 to 50 K
P03 – Min. flow temperature 20 °C 0 to 150 °C
P04 – Max. flow temperature 120 °C 0 to 150 °C
P05 – Heating characteristic gradient 1.6 0.2 to 3.2
P06 – Heating characteristic level 0 K –30 to 30 K
Examples for setting the heating characteristic:
4Old building, radiator design 90/70: Gradient approx. 1.8
4New building, radiator design 70/55: Gradient approx. 1.4
4New building, radiator design 55/45: Gradient approx. 1.0
4Underfloor heating depending on arrangement: Gradient smaller than 0.5
18 EB 5757-7 EN
Functions
RüS
UP
VS BE1
VL RL
AS
Fig. 11 · Typical application: Outdoor temperature compensated flow temperature control with return flow limitation;
switching between operating modes over a binary contact (BI1)
AS Outdoor sensor
RüS Return flow sensor
VS Flow sensor
UP Circulation pump
RL District heating network return flow
VL District heating network supply

6.1.1 Override using potentiometer
The potentiometer input (e.g. by connecting Type 5257-2 with remote adjustment) can
change either the heating characteristic level or gradient, depending on the configuration.
The parameters
Gradient shift range via potentiometer and Level shift range via potentiome-
ter
are used to adjust the range (±) in which the override is to take place.
Functions WE Configuration
F05 – Potentiometer input 0 F05 - 1
F06 – Resistance range of potentiometer 0 F06 - 0: 1000 to 1100 Ω
F06 - 1: 1000 to 2000 Ω
F07 – Potentiometer function 0 F07 - 0: Level shift
F07 - 1: Gradient shift
Parameters WE Range of values
P07 – Gradient shift range via potentiometer 1.0 0.0 to 1.5 (only with F 07 - 1)
P08 – Level shift range via potentiometer 15 K 0 to 30 K (only with F 07 - 0)
Examples:
4Potentiometer function F07 - 0
Heating characteristic gradient P05 = 1.6
Gradient shift range via potentiometer P07 = 1.0
⇒The gradient can be shifted between 0.6 and 2.6 (±1.0).
4Potentiometer function F07 - 1
Heating characteristic level P06 = 0 K
Level shift range via potentiometer P08 = 15 K
⇒The level can be adjusted between –15 K and +15 K (±15 K). The limits adjusted
for the flow temperature still apply.
6.1.2 Summer mode
Should the outdoor temperature exceed the Outdoor temperature limit value ( rated opera-
tion/reduced operation
), the controller switches off the heating, i.e. the valve is closed and
the circulation pump is switched off after the
Pump lag time (P23) has elapsed.
The heating is switched on again when the outdoor temperature falls below the limit.
Parameters WE Range of values
P17 – Outdoor temperature limit value at rated operation 22 °C 0 to 50 °C
P18 – Outdoor temp. limit value at reduced operation 15 °C 0 to 50 °C
P23 – Pump lag time 5 min 1 to 999 min
EB 5757-7 EN 19
Functions

6.1.3 Delayed outdoor temperature adaptation
The calculated outdoor temperature is used to determine the flow temperature set point. The
heat response is delayed when the outdoor temperature either increases or decreases.
If the outdoor temperature varies by, for example, 12 °C within a very short period of time,
the calculated outdoor temperature is adapted to the actual outdoor temperature in small
steps. Assuming a
Delay of 3 °C/h, the linear adaptation would take = 12
3
°
°
C
C/h= 4 h.
Note: The delayed outdoor temperature adaptation helps avoid unnecessary overloads of
central heating stations caused by either overheated buildings occurring, for example, due to
warm winds, or temporarily insufficient heating due to the outdoor sensor being exposed to
direct sunshine.
Functions WE Configuration
F04 – Delayed outdoor temperature 0 F04 - 1
Parameter WE Range of values
P16 – Delay time for outdoor temperature 3 °C/h 1 to 6 °C/h
6.2 Fixed set point control
The flow temperature is controlled to the fixed value in Flow temperature set point . In re-
duced operation, the flow set point is used for the control reduced by the amount in
Flow
temperature set-back in reduced operation.
A connected outdoor sensor does not have any
affect on the control.
Functions WE Configuration
F01 – Control mode 1 F01 - 0
Parameters WE Range of values
P01 – Flow temperature set point 70 °C 0 to 150 °C
P02 – Flow temp. set-back in reduced operation 15 K 0 to 50 K
Note: The return flow limitation and the potentiometer override are still active when config-
ured correspondingly.
20 EB 5757-7 EN
Functions