Samson TROVIS 5757-7 Service manual

Controller with Electric Actuator
Type 5757-7
Mounting and
Operating Instructions
EB 5757-7 EN
Firmware version 1.0x
Edition August 2005
Fig. 1 · Type 5757-7 Controller with Electric Actuator for heating applications

Contents Page
1 Design and principle of operation . . . . . . . . . . . . . . . . . . . 5
1.1 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Connection to the valve . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Mounting position . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Dimensions in mm . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 Outdoor temperature compensated control . . . . . . . . . . . . . . . 13
5.1.1 Override using potentiometer . . . . . . . . . . . . . . . . . . . . . 15
5.1.2 Summer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.3 Delayed outdoor temperature adaptation. . . . . . . . . . . . . . . . 16
5.2 Fixed set point control . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2.1 Room temperature influence . . . . . . . . . . . . . . . . . . . . . . 16
5.3 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3.1 Switchover via binary input . . . . . . . . . . . . . . . . . . . . . . 18
5.3.2 Switchover via room panel . . . . . . . . . . . . . . . . . . . . . . 19
5.3.3 Switchover via binary input in room panel . . . . . . . . . . . . . . . 19
5.4 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.5 Return flow temperature limitation . . . . . . . . . . . . . . . . . . . 19
5.6 Pump forced operation . . . . . . . . . . . . . . . . . . . . . . . . 20
5.7 External request for heat demand . . . . . . . . . . . . . . . . . . . 20
5.8 Control principle . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.9 Direction of action. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 Configuration and operation using TROVIS-VIEW interface . . . . . . 23
6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2 Installing TROVIS-VIEW software . . . . . . . . . . . . . . . . . . . 24
6.3 Starting TROVIS-VIEW and performing settings . . . . . . . . . . . . 25
6.3.1 Activating/deactivating functions . . . . . . . . . . . . . . . . . . . 27
6.3.2 Setting parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.3.3 Reading operational information. . . . . . . . . . . . . . . . . . . . 29
7 Data transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.1 Data transmission between TROVIS-VIEW and the actuator
(connecting cable). . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.1.1 Offline operation (indirect data transmission) . . . . . . . . . . . . . . 33
2EB 5757-7 EN
Contents

7.1.2 Online operation (direct data transmission). . . . . . . . . . . . . . . 33
7.2 SAMSON memory pen . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.1 Data transfer between TROVIS-VIEW and memory pen . . . . . . . . . 34
7.2.2 Data transmission between actuator and memory pen. . . . . . . . . . 35
7.2.3 Copy function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.2.4 Manual operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8 Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.1 Function block list . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2 Parameter list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.3 Customer settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
EB 5757-7 EN 3
Contents

4EB 5757-7 EN
Safety instructions
General safety instructions
4
Assembly, 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.
4
Any hazards which could be caused in the connected valve by the process
medium, operating pressure or moving parts are to be prevented by means
of the appropriate measures.
4
Proper transportation and storage are assumed.
4
The actuators has been designed for use in electrical power installations.
For wiring and maintenance, you are required to observe the relevant safety
regulations. The actuator must be protected against unintentional
reconnection of the power supply.
4
Note:
Actuators with a CE marking fulfill the requirements of the Directives
94/9/EC and 89/336/EEC.
The Declaration of Conformity is available on request.

1 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-depend-
ent 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
when the power supply is disconnected by
the handwheel (2). Travel and direction of
action can be read off the travel indicator
(5) on the side of the actuator housing.
EB 5757-7 EN 5
Design and principle of operation
Fig. 2 · Functional diagram
Stem retracts
Stem extends
1 Controller/actuator
1.1 Connecting lead
2 Handwheel (only to
be used when power
is disconnected)
3 Actuator stem
4 Coupling nut
5 Travel indicator
6 Plug stem
7 Valve spring
8 Cover, serial
interface connection
5

1.1 Accessories
Heating applications, see section 5
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 6
4TROVIS-VIEW Configuration and Opera-
tor Interface (6661-1066) for
Type 5757-7 Controller with Electric Actu-
ator
4Hardware package
Accessories for direct and indirect data
transmission (including a memory pen,
connecting cable and modular adapter),
order no. 1400-7704
4Memory pen
Indirect data transmission,
order no. 1400-7697
1.2 Technical data
Type 5757-7 Controller with Electric Actuator
Temperature sensor Max. 3 x Pt 1000
Setting range 0 to 150 °C
Potentiometer input 1000 to 1100 Ωor
1000 to 2000 Ω
Binary 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
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
6EB 5757-7 EN
Design and principle of operation

2 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).
2.1 Mounting position
Any mounting position may be used, how-
ever, may not be installed in a suspended
position.
EB 5757-7 EN 7
Connection to the valve
2
2 Handwheel
3 Actuator stem
4 Coupling nut
Fig. 3 · Connecting actuator and valve

3 Electrical connection
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 standard
operation or in case of a fault in the
system or any other system parts.
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 5.2). On
using an outdoor sensor, it can change the
adjusted heating characteristic (see sec-
tion 5.1).
The non-floating pump output can alterna-
tively be used as an binary output for an ex-
ternal 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 slowly.
Caution!
Connect the actuator to the electrical
network only after the power supply
has first been switched off. Make
sure the power cannot be switched
on unintentionally!
The pump output L’ is non-floating
(230 V~).
4Perform the electrical connection de-
pending on the heating application ac-
cording to one of the following wiring di-
agrams (Figs. 4 and 5).
As soon as the actuator is connected to
the power supply, the initialization pro-
cedure starts.
The actuator stem extends (with operat-
ing direction selected for globe valves)
and the red and yellow LEDs are illumi-
nated located under the cover on top of
the actuator.
As soon as the actuator stem has
reached the final position, the red LED is
turned off. The yellow LED remains illu-
minated and indicates that the controller
with electric actuator is ready for opera-
tion.
8EB 5757-7 EN
Electrical connection

EB 5757-7 EN 9
Electrical connection
Fig. 4 · Wiring diagrams Note: Terminals at point of installation, not included in scope of delivery
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, return flow, and outdoor sensors as well as potentiometer
to adjust the set point
e.g. Type 5257-2 with remote adjuster
Caution!
Live wires
or ye rd br blk gr br bl blk
34 6521LL´N
230 V,
VS
Pt 1000 Pt 1000 Pt 1000
ASRüS 50 Hz
Application with flow, return flow, and outdoor sensors as well as binary input
to switch between operating modes
or orange
ye yellow
rd red
br brown
blk black
gr green
Caution!
Live wires
br brown
bl blue
blk black

10 EB 5757-7 EN
Electrical connection
Fig.5·Wiring diagrams Note: Terminals at point of installation, not included in scope of delivery
or ye rd br blk gr br bl blk
34 6521LL´N
230 V, 50 Hz
VS
Pt 1000 Pt 1000
AS
Application with flow sensor and outdoor sensors
Caution!
Live wires
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, return flow, and room sensors with mode selector switch and set point adjuster
Type 5257-7
Room Panel
Caution!
Live wires
or orange
ye yellow
rd red
br brown
blk black
gr green
br brown
bl blue
blk black

4 Dimensions in mm
EB 5757-7 EN 11
Dimensions in mm
Ø 12
55
80
11
32 70 eL einfahrend
aL ausfahrend
114
2.5 m
70
Fig. 6 · Type 5757-7 Controller with Electric Actuator

12 EB 5757-7 EN
Dimensions in mm
Type 5267-2 Contact
Sensor, Pt 1000
(flow and return flow
temperature measurement)
Type 5227-2 Outdoor Sensor,
Pt 1000
Color: RAL 9016
Type 5257-7 Room Panel, Pt 1000
Color: Cover and knobs RAL 9016 · Base RAL 7047
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
Fig. 7 · Accessories for heating applications

5 Functions
Functions and parameters are entered in the TROVIS-VIEW Operator Interface (see
section 6).
5.1 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. 8).
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 parallely upwards or downwards.
In reduced operation, the flow temperature is reduced by the amount set in
Flow temperature
setback in reduced operation. The Maximum flow temperature
and Minimum flow tempera-
tur
e parameters limit the flow temperature range. Return flow temperature limitation (see
section 5.5) is an exception as it can reduce the flow temperature without restriction down to
20 °C flow temperature set point.
EB 5757-7 EN 13
Functions
130
120
150
140
110
100
90
80
70
60
50
40
30
2020 16 12 8 4 0 -4 -8 -12 -16 -20
2.4
3.2
2.9
2.6
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.4
0.2
[˚C]
[˚C] tVL
tA
Fig. 8 · 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
14 EB 5757-7 EN
Functions
Fig. 9 · Typical application: Outdoor temperature compensated flow temperature control with return flow limitation;
switching between operating modes using a binary contact

5.1.1 Override using potentiometer
The potentiometer input (e.g. by connecting Type 5257-2 with remote adjustment) can
change either the heating characteristc 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 influence is to take place.
Functions WE Configuration
F05 – Potentiometer input 0 F05 - 1
F06 – Resistance range of potentiometer 0 F06 - 1 (Type 5257-2)
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.
5.1.2 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 after the
Pump lag time has elapsed.
The heating is switched on again when the outdoor temperature falls below the set point.
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
P22 – Pump lag time 5 min 1 to 999 min
EB 5757-7 EN 15
Functions

5.1.3 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 decreases, increases or in-
creases and 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 – Delayed value for outdoor temp. adaptation 3 °C/h 1 to 6 °C/h
5.2 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
effect 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
5.2.1 Room temperature influence
On connecting a Type 5257-7 Room Panel, the Flow temperature set point is influenced by
the room temperature:
16 EB 5757-7 EN
Functions

The heat supply is matched to the required amount over a permanently active flash adapta-
tion. The room sensor is polled at regular intervals (
T
r
Flash adaptation). If the room temper-
ature is lower than the
Room temperature limit at rated operation or Room temperature limit
at reduced operation,
the flow temperature is raised based on the Flow temperature set
point
.
If the room temperature exceeds the room temperature set point (rated operation/reduced
operation) by the amount in
Maximum room temperature boost , the heating is switched off,
i.e. the valve is closed and the circulation pump is switched off after the
Pump lag time has
elapsed.
In the event, the parameter P12 –
T
r
Flash adaptation is set to 0, the control is a pure fixed set
point control without room temperature influence.
Note!
We recommend not to select a value that is too low for parameter P12. In particular, in cases
where cooling loads, such as drafts or open windows, affect the control process, short cycles
usually have a negative effect. The heating is directly switched off after the cooling stops.
EB 5757-7 EN 17
Functions
Fig. 10 · Typical application: Fixed set point control with room temperature influence and return flow temperature
limitation; switching between operating modes at room panel (Type 5257-7)
AS Outdoor sensor
RüS Return flow sensor
VS Flow sensor
UP Circulation pump
RL District heating network return flow
VL District heating network supply

Note!
The set points for room temperature entered in TROVIS-VIEW can be reduced or raised by
5 K at the room panel.
Functions WE Configuration
F01 – Control mode 1 F01 - 1
F02 – Selecting the reference variable 0 F02 - 1
Parameters WE Range of values
P01 – Flow temperature set point 70 °C 0 to 150 °C
P12 – TrFlash adaptation 10 min 0 to 100 min
P19 – Room temperature limit at rated operation 20 °C 10 to 40 °C
P20 – Room temperature limit at reduced operation 15 °C 10 to 40 °C
P21 – Maximum room temperature boost 1 K 1 to 6 K
P22 – Pump lag time 5 min 1 to 999 min
5.3 Operating modes
5.3.1 Switchover via binary input
The active binary input determines which operating mode is used. Depending on the config-
uration, the following applies:
4F08 - 0 Open binary input – Rated operation
Closed binary input – OFF/Frost protection
4F08 - 1 Open binary input – Rated operation
Closed binary input – Reduced operation
Note!
It is not possible to connect the Type 5257-7 Room Panel at the same time in this case (see
section 5.3.3 on Switchover via binary input in room panel).
Functions WE Configuration
F05 – Potentiometer input 0 F05 - 0
F08 – Binary input function 0 F08 - 0: Rated operation + OFF/Frost protect.
F08 - 1: Rated and reduced operation
18 EB 5757-7 EN
Functions

5.3.2 Switchover via room panel
The operating mode of the controller is determined at the mode selector switch on the
Type 5257-7 Room Panel:
Rated operation (day mode)
Reduced operation (night mode)
OFF/Frost protection
Functions WE Configuration
F05 – Potentiometer input 0 F05 - 1
F06 – Resistance range of potentiometer 0 F06 - 0 (Type 5257-7 Room Panel)
5.3.3 Switchover via binary input in room panel
The terminals 1 and 4 of the Type 5257-7 Room Panel can be bridged by means of an ex-
ternal floating contact (e.g. by a time switch with downstream contactor relay with floating
make or break contact). This enables the controller to switch to the rated operation mode
when the mode selector switch is set to reduced operation or OFF/Frost protection .
The following applies:
4BI break contact Operating mode is the same as the mode set at the mode selector
switch
4BI make contact Operating mode is rated operation,
regardless of the mode set at the mode selector switch
Functions WE Configuration
F05 – Potentiometer input 0 F05 - 1
F06 – Resistance range of potentiometer 0 F06 - 0 (Type 5257-7 Room Panel)
5.4 Frost protection
If the controller is in the operating mode OFF/Frost protection (see section 5.3), frost protec-
tion measures are initiated if the following applies:
4Outdoor temperature < 3 °C (outdoor temperature compensated control) or flow
temperature < 15 °C (fixed set point control with room temperature influence)
The circulation pump is switched off and the flow temperature is kept at 20 °C.
5.5 Return flow temperature limitation
The temperature difference between the flow and return flow in a network indicates how well
the energy is used: the greater the difference, the higher the efficiency.
EB 5757-7 EN 19
Functions

A return flow sensor is sufficient to evaluate the temperature difference when the network
flow temperatures are predetermined. The flow temperature set point is reduced when the
Maximum return flow temperature measured at the return flow sensor exceeds the limit tem-
perature:
The reduction amount is calculated from the deviation of the return flow temperature multi-
plied by the factor
Kp Return flow temperature limitation . The rate at which the return flow
temperature is reduced by the calculated amount is determined by
Tn Return flow tempera-
ture limitation
.
The yellow LED blinks slowly if the flow temperature is reduced due to the Return flow tem-
perature limitation function
The return flow is not limited if the parameter setting
Tn Return flow temperature limitation =
0 even if a return flow sensor is connected.
Function WE Configuration
F11 – Return flow temperature sensor 1 F11 - 1
Parameter WE Range of values
P13 – Maximum return flow temperature 50 °C 10 to 90 °C
P14 – Kp Return flow temperature limitation 1.0 0.1 to 50.0
P15 – Tn Return flow temperature limitation 400 s 0 to 999 s
5.6 Pump forced operation
A deactivated circulation pump is forced-operated every 24 hours for one minute. This func-
tion is disenabled by selecting F10 - 0 or F09 - 1.
Functions WE Configuration
F09 – Binary output function 0 F09 - 0
F10 – Anti-block protection of pump 1 F10 - 1
5.7 External request for heat demand
The controller with electric actuator can issue a heat demand to a higher-level controller
over the binary output BO in rated or reduced operation. In this case, a coupling relay
(contactor relay with floating contact) must be used to adapt the electrical connection.
This function is only possible when the binary output is not configured as a pump output.
Function WE Configuration
F09 – Binary output function 0 F09 - 1
20 EB 5757-7 EN
Functions