Danfoss ECtemp 850 IV User manual

ECtemp 850 IV controller
© Danfoss | 2019.07
Installation instruction

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 308097083 / VIMHE202
Table of Contents
1 User Manual .......................................... 4
1.1 System overview..................................... 4
1.2 General use ......................................... 6
1.3 Possible alarms during operation..................... 8
1.4 Changing parameters and performance of systems ... 9
2 Installer Manual ...................................... 11
2.1 System overview.....................................11
2.2 Placement ...........................................12
2.3 Connection steps for system .........................12
2.4 Installation steps for system/systems .................16
2.5 Modification of system(s).............................23
3 Technical Specifications ............................... 25
3.1 Technical data .......................................25
3.2 Factory settings......................................26
4 Appendix............................................. 27
A: Menu system ........................................27
B: How it works.........................................32
C: PSU and feeder cable ................................36
5 Warranty ............................................. 38

Installation instruction ECtemp 850 IV
08097083 / VIMHE2024 | © Danfoss | 2019.07
1 User Manual
1.1 System overview
The ECtemp 850 IV system is capable of keeping outdoor areas free of ice and snow.
The ECtemp 850 IV can handle up to 2 independent areas, in any of the following
combinations:
• Single roof system
To keep gutters, valley gutters and down pipes free
of ice and snow, and to prevent icicles from causing
damage. It is also possible to use the roof system to
reduce/remove the snow weight from a roof.
(Roof system A).
A
• Single ground system
To keep areas like parking areas, paths, garage en-
trances, steps, ramps, roadways and bridges free of
ice and snow. (Ground systems A).
A
A
• 1 ground system and 1 roof system (combi system)
Consists of 1 single roof system A and 1 single
ground system B.
A
BB
• 2 roof systems (dual system)
Consists of 2 x“Single roof systems (Aand B) ”.
B
A
• 2 ground systems (dual system)
Consists of 2 x“Single ground systems (Aand B) ”.
AB

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 508097083 / VIMHE202
When more than 1 area is controlled by the ECtemp 850 system, it is also possible to
prioritize the areas. Prioritizing makes it possible to operate 2 areas, even if the needed
power for 2 areas is not present.
The ECtemp 850 is fully automatic and operated digitally by means of the intelligent
sensors located in the heated terrain. Each sensor measures both temperature and
moisture, and the system turns the heating elements on and off based on these read-
ings. By combining moisture and temperature readings, the system is able to save
around 75% energy compared to systems which only measure temperature readings.
The digital sensors used for the ECtemp 850 also provide the most exact readings when
compared with corresponding analogue systems. The result is optimum functionality
and low energy consumption.
For more information about the ice and snow melting function of the ECtemp 850,
please refer to: Appendix B:“How it works”.
A typical installation consists of:
• Controller unit (only one)
This is the device which, based on the measure-
ments from the sensors, decides when to heat the
connected area(s).
• Power supply (one or more)
The power supply delivers power to the controller
unit and the connected sensors.
• Ground sensor (one or more)
At least 1 ground sensor is needed for each ground
area, but to get the best performance of a system, 2
or more sensors are recommended.
For more information please refer to the sensor
manual.
• Roof sensor (one or more)
At least 1 roof sensor is needed for each roof area,
but for complex roof constructions, 2 or more sen-
sors are recommended.
For more information please refer to the sensor
manual.

Installation instruction ECtemp 850 IV
08097083 / VIMHE2026 | © Danfoss | 2019.07
1.2 General use
The ECtemp 850 is operated via 3 buttons and an alpha numeric display capable of
displaying information in various languages.
Buttons
The functions of the 3 buttons are:
Info Shows additional information / help (Only active when lit)
Next Next menu entry / next line / next letter
Enter Confirm / select
Besides the normal function of the buttons, some special combinations are important
to the user:
Return to home of menu system: Hold for 2 seconds
Master reset: Restore factory defaults AND de-
lete installed systems (In case of insolvable prob-
lems due to a wrong choice of language, etc.)
Hold + for 8 seconds
Display
The following icons have a special meaning:
This animated icon is shown, when the system is heating. When the icon is
blinking the system wants to heat, but is paused (system has low priority).
This icon is shown, when the system has detected moisture, and the tem-
perature is above the melting temperature.
This icon is shown, when the system has detected snow or ice, and the tem-
perature is below the melting temperature.
The ECtemp 850 can simultaneously control up to 2 different systems. These 2 systems
are referred to as System A and System B. The ECtemp 850 gives the user the oppor-
tunity to view the current status of the systems. The status can be shown in 2 different
ways.

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 708097083 / VIMHE202
Combined view (default):
The combined view shows the status of both systems at
the same time. System A is shown on the upper display
line, and System B is shown on the lower display line.
This view gives the user a quick overview of all the systems.
A: ROOF
B: GROUND
Flipped view:
The flipped view shows the status of 1 system at a time.
The status of each system is shown for 5 seconds.
This view gives the user more detailed information about
each system.
A: ROOF
>>STANDBY
B: GROUND
>>MELTING
The user can always press to get more information about the current status
irrespective of view selected.
Menu system
The menu system is navigated by the keys and .
No matter if the ECtemp 850 controls one
or two systems, the look and use of the
menu system is always the same. This is
obtained by making the entry to each
system in the main menu. The possibili-
ties and settings for each system are first
accessible after the user has selected the
desired system.
To the right is given an example of the main
menu and the menus for System A and
System B.
Please note, that only a few of the menus for each system are shown!
For a complete overview of the menu system, please refer to Appendix A:“Menu sys-
t e m ”.
System
B
System
A
5s
5s
Only visible when System B is installed !
 
 
 

  

 

 

  
 
 

  
 
 

  


Installation instruction ECtemp 850 IV
08097083 / VIMHE2028 | © Danfoss | 2019.07
1.3 Possible alarms during operation
Clogged drain
Description: When clogged drain warning has been enabled, an alarm is raised
when the system constantly has been detecting moisture for 14
days.
If the ECtemp 850 controls more than 1 system, and prioritiz-
ing has been enabled, the time before clogged drain warning-
for the down-prioritized system, can be much longer. The time
is only updated, when the system actually is allowed to heat
the area (e.g. the up-prioritized system is not heating)
Solution: - Check gutter and down pipes for any obstacles preventing the
melting water to flow away.
- Check if sensors are covered with dirt.
Missing sensor
Description: When the connection to a sensor is lost, the ECtemp 850 alarms
the user. At the same time the ECtemp 850 automatically switches
the system to“Constant Off”mode, and user interaction with the
ECtemp 850 is needed.
Solution: - Acknowledge error and go to“Installer Site” in the menu system
and select “Change System”.
- Contact your local installer to get a replacement.
New sensor added
Description: When a new sensor is added, the ECtemp 850 alarms the user and
at the same time automatically switches to“Constant Off”mode.
User interaction is needed in order to correct the error.
Solution: Acknowledge error and go to“Installer Site” in the menu system
and select “Change System”.
Sensor malfunction
Description: When something is wrong with the readings from connected sen-
sors to the ECtemp 850, an alarm is raised.
Not all error prone sensors can be discovered using this fea-
ture!
Solution: - Acknowledge error and go to“Installer Site” in the menu system
and select “Change System”.
- Contact your local service centre to get a replacement.

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 908097083 / VIMHE202
1.4 Changing parameters and performance of systems
Several parameters for each system can be changed during and after the installation.
For a complete understanding of how these parameters affect the performance of the
roof and ground system, please refer to Appendix B:“How it works”.
Only change the ECtemp 850 parameters if you are aware of the effects of
your actions. Reference: Appendix A: Installer menu
Roof system
Melting temperature
Changing the melting temperature will affect when the system is activated in case of
moisture and low temperatures.
The factory setting is 1.5 °C. This means that the heating system will be activated if the
temperature falls below 1.5 °C and moisture is detected.
Moisture level
The“moisture level”decides when the system detects moist.
The factory setting is 50 (on a scale from 5 to 95). The lower the setting, the more sen-
sitive the system is to moisture.
Post-heat
Once the sensor has detected that the roof/gutter is dry and free of ice and snow the
system will keep heating for another hour (default). If you wish to increase/decrease
this time see Appendix A: Installer menu.
The factory setting is 1 hour (on a scale from 0 to 9 hours)
Priority
When using the ECtemp 850 as a dual or combi system, it is possible to prioritize the
systems. When the priority of 2 systems is equal, both systems can heat at the same
time. If the priority of the 2 systems differs, and both systems want to heat, only the
system with the highest priority is allowed to heat.
The factory setting is 1 (highest priority) for all systems.
Clogged drain
It is possible to enable and disable the “Clogged drain warning”.
The factory setting is “Warning On”.
System and sensor name
It is possible to change the names of the system and connected sensors
(see Appendix A: Installer menu).

Installation instruction ECtemp 850 IV
08097083 / VIMHE20210 | © Danfoss | 2019.07
Ground system
Melting temperature
Changing the melting temperature will affect when the system is activated in case of
moisture and low temperatures.
The factory setting is 4 °C.
This means that the heating system will be activated if the temperature falls below 4
°C and moisture is detected.
Standby temperature (maintained ground temperature)
The higher the standby temperature the faster the system will be able to melt ice and
snow. On the other hand the higher the standby temperature the higher the running
costs. So, determining the standby temperature is a trade-off between fast melting or
low running costs.
The factory setting is –3 °C.
Moisture level
The“moisture level”decides when the system detects moist.
The factory setting is 50 (on a scale from 5 to 95).
The lower the setting, the more sensitive the system is to moisture.
Post-heat
Once the sensor has detected that the roof/gutter is dry and free of ice and snow the
system will keep heating for another hour (default). If you wish to increase/decrease
this time see Appendix A: Installer menu.
The factory setting is 1 hour (on a scale from 0 to 9 hours)
Priority
When using the ECtemp 850 as a dual or combi system, it is possible to prioritize the
systems. When the priority of 2 systems is equal, both systems can heat at the same
time. If the priority of the 2 systems differs, and both systems want to heat, only the
system with the highest priority is allowed to heat.
The factory setting is 1 (highest priority) for all systems.
Clogged drain
It is possible to enable and disable the “Clogged drain warning”.
The factory setting is “Warning On”.
System and sensor name
It is possible to change the names of the system and connected sensors.

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 1108097083 / VIMHE202
2 Installer Manual
2.1 System overview
The ECtemp 850 can handle up to 2 independent areas, in any of the following
combinations:
• Single roof system
(1 system, 1–4 roof sensors)
• Single ground system
(1 system, 1–4 roof sensors).
• 1 ground system and 1 roof system (combi system)
(2 systems, 2–4 sensors total, minimum 1 sensor per system).
• 2 roof systems (dual system)
(2 systems, 2–4 sensors total, minimum 1 sensor per system).
• 2 ground systems (dual system)
(2 systems, 2–4 sensors total, minimum 1 sensor per system).
When more than 1 area is controlled by the ECtemp 850 system, it is also possible to
prioritize the areas. Prioritizing makes it possible to operate 2 areas, even if the need-
ed power for 2 areas is not present.
A typical ice and snow melting system consists of:
• ECtemp 850
• Only 1 ECtemp 850 is allowed on the DEVIbus™.
• Power supply
• More power supplies can be connected in parallel (if needed)
• Be aware of maximum number of sensors on each power supply
(Refer to Technical Specification for power demand of sensors).
• Ground and/or roof sensor(s)
• Be aware of maximum number and cable length of sensors on each power
supply
(Refer to sensor manual for a more detailed description).

Installation instruction ECtemp 850 IV
08097083 / VIMHE20212 | © Danfoss | 2019.07
2.2 Placement
The ECtemp 850 and power supply are designed for DIN rail mounting. When mount-
ing please be aware of the following conditions:
The ECtemp 850 is designed and approved to operate in the temperature
range –10 °C to 40 °C.
The ECtemp 850 is only IP20 protected, thus not water resistant.
The installer must ensure proper enclosure of the ECtemp 850 according to
national standards (electrical safety).
2.3 Connection steps for system
Only authorized personnel is allowed to install the ECtemp 850.
When wiring up the ECtemp 850 and sensors, please be aware of the following
conditions:
When the ECtemp 850 is used in a dual system configuration, it is prefera-
ble that each sensor bus (DEVIbus™) can be connected and disconnected
via switches. During the installation of a dual system, each system must be
connected one at a time.
Be aware of maximum allowable power drain from power supply to sensors.
Below is shown the recommended order of the installation. Please refer to figure A
for connection of ECtemp 850 and refer to figure B–G for a guideline to connect the
heating elements to ECtemp 850.
1. Connect heating cables to the ECtemp 850
• Please notice that a single system ALWAYS uses the System A output relay
• When using external power relay, please refer to the connection diagrams.
2. Connect the power supply to the ECtemp 850
• Do not connect the power supply to mains yet
3. Connect sensors to the DEVIbus™
• When used as a dual system, only the sensors for System A can be connected.
For connection of System B please refer to chapter:“Installation of dual system”.
4. Connect the power supply to mains.

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 1308097083 / VIMHE202
ECtemp 850 IVPSU 24 VDC
DC output DC supply
White
White
Red
Black
White
White
Red
Black
Sensor Sensor
13 13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
12
54
DEVIbusTM sensors
Red Black White White
230 VAC
50–60 Hz
ALARM
2A250 V~
System A
15 A 250 V~
System B
15 A 250 V~
+ + – +––
The ECtemp 850 has an integral alarm function that monitors the attached sensors
and the in-built microprocessor.
An external alarm may also be connected to the system.
Fig. A — Connection of ECtemp 850 IV

Installation instruction ECtemp 850 IV
08097083 / VIMHE20214 | © Danfoss | 2019.07
Installer Manual
230 V cables, 1–3 P/1–3 loads — System
A
ECtemp 850 IV
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
L1
L2
L3
N
L
K1
K1 K1= 1 x ln
N
230 V cables
230 V cables, 1–3 P/1–3 loads — System
B
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
L1
L2
L3
N
L
K1
K1 K1= 1 x ln
N
ECtemp 850 IV
230 V cables
Fig. B Fig. C

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 1508097083 / VIMHE202
400 V cables, 2–3 Phase/1–3 Loads — System A
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
L1
L2
L3
N
L
K1 K2
K1 K2
ECtemp 850 IV
400 V cables
400 V cables, 2–3 Phase/1–3 Loads — System B
ECtemp 850 IV
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
L1
L2
L3
N
L
K1 K2
K1 K2
400 V cables
Direct connection — System A
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
L
N
max. 15 A
ECtemp 850 IV
230 V cables
Direct connection — System B
ECtemp 850 IV
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
L
N
max. 15 A
230 V cables
Fig. D
Fig. F
Fig. E
Fig. G

Installation instruction ECtemp 850 IV
08097083 / VIMHE20216 | © Danfoss | 2019.07
2.4 Installation steps for system/systems
The installation of the ECtemp 850 is very easy, and the user is guided through the in-
stallation process. The installation process differs a little depending on which kind and
the number of systems to be installed.
Please follow the general description and finally select the installation scenario accord-
ing to the system type.
Change setting with key:
Accept setting with key:
General
Power on ECtemp 850 IV WELCOME TO
ECTEMP 850 IV
Select language SELECT LANGUAGE:
ENGLISH
System is being checked… CHECKING SYSTEM
<>
Select system configuration
• Roof system (1 system)
• Ground system (1 system)
• Combi system (2 systems)
• Dual system (2 systems)
SYSTEM SIZE:
1 SYSTEM
The rest of the installation is divided into the system configurations; roof, ground,
combi or dual, as listed above.

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 1708097083 / VIMHE202
Installation of roof system
The installation of a ECtemp 850 with 1 roof system has been selected.
It is optional if the sensors are connected to the ECtemp 850 before power on or dur-
ing the installation.
The system uses the output System A.
If sensors for System A are not connected — do it now!
Press or wait…
CONNECT SENSORS:
SYSTEM A
System is being scanned to find type of connected
sensors… SYSTEM A
SCANNING...
Select system type: Roof SYSTEM TYPE:
ROOF
Wait until correct number of sensors for System A
is found. 1 ROOF SENSOR
FOUND. ACCEPT?
Press when all sensors are found…
System A is installed…
SYSTEM A!
INSTALLED
System is being checked… CHECKING SYSTEM
<>
Press to configure System A (naming sensors
and changing factory settings).
CONFIG SYSTEM:
SYSTEM A
Please refer to“Changing parameters and performance of systems”in “User Manual”
for description of the configurable parameters.
If for some reason you do not wish to configure the system now you can press
to skip configuration of system.
Press to end configuration. PRESS TO END
CONFIGURATION.

Installation instruction ECtemp 850 IV
08097083 / VIMHE20218 | © Danfoss | 2019.07
Installation of ground system
The installation of a ECtemp 850 with 1 ground system has been selected.
It is optional if the sensors are connected to the ECtemp 850 before power on or dur-
ing the installation.
The system uses the output System A.
If sensors for System A are not connected — do it now!
Press or wait…
CONNECT SENSORS:
SYSTEM A
System is being scanned to find type of connected
sensors… SYSTEM A
SCANNING...
Select system type: Ground. SYSTEM TYPE:
GROUND
Wait until correct number of sensors for System A
is found. 3 GROUND SENSOR
FOUND. ACCEPT?
Press when all sensors are found…
System A is installed…
SYSTEM A!
INSTALLED
System is being checked… CHECKING SYSTEM
<>
Press to configure System A (naming sensors
and changing factory settings).
CONFIG SYSTEM:
SYSTEM A
Please refer to“Changing parameters and performance of systems”in “User Manual”
for description of the configurable parameters.
If for some reason you do not wish to configure the system now you can press
to skip configuration of system.
Press to end configuration. PRESS TO END
CONFIGURATION.

Installation instruction ECtemp 850 IV
© Danfoss | 2019.07 | 1908097083 / VIMHE202
Installation of combi system
The installation of a ECtemp 850 with 1 roof and 1 ground system has been selected.
It is optional if the sensors are connected to the ECtemp 850 before power on or dur-
ing the installation.
The first installed system (System A) is using the output System A.
The second installed system (System B) is using the output System B.
It is freely selectable if System A should be the roof or ground system. However it is
preferable that System A is the roof system, since System A is shown on the upper
line of the display. Please refer to the description of the Display and Combined view
in the user manual.
If sensors for System A are not connected — do it now!
Press or wait…
CONNECT SENSORS:
SYSTEM A
System is being scanned to find type of connected
sensors… SYSTEM A
SCANNING...
Select system type: Roof (if roof system is preferred
as System A)SYSTEM TYPE:
ROOF
Wait until correct number of sensors for System A
is found. 1 ROOF SENSOR
FOUND. ACCEPT?
Press when all sensors are found…
System A is installed…
SYSTEM A!
INSTALLED
If sensors for System B are not connected — do it now!
Press or wait…
CONNECT SENSORS:
SYSTEM B
System is being scanned to find type of connected
sensors… SYSTEM B
SCANNING...
Wait until correct number of sensors for System B
is found. SYSTEM TYPE:
GROUND
Press when all sensors for System B are
found…
3 GROUND SENSORS
FOUND. ACCEPT?

Installation instruction ECtemp 850 IV
08097083 / VIMHE20220 | © Danfoss | 2019.07
Press when all sensors for System B are
found…System B is installed…
SYSTEM B!
INSTALLED
System is being checked… CHECKING SYSTEM
<>
Press to select system to configure.
CONFIG SYSTEM:
SYSTEM A
Press to configure selected system (naming
sensors, changing factory settings and setting priorities.)
CONFIG SYSTEM:
SYSTEM B
Please refer to“Changing parameters and performance of systems”in “User Manual”
for description of the configurable parameters.
Press to end configuration. PRESS TO END
CONFIGURATION.