Danfoss DEVIreg 850 IV User manual

www.DEVI.com
Installation instruction
DEVIreg™ 850 IV controller
EN

DEVIreg™ 850 IV
Installation instruction2
Table of Contents
1 User Manual � � � � � � � � � � � � � � � � � � � � � � � � � � 3
1.1 System overview. . . . . . . . . . . . . . . . . . . . . . . 3
1.2 General use . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Possible alarms during operation . . . . . . . . . . . . 7
1.4 Changing parameters and performance of systems 8
2 Installer Manual� � � � � � � � � � � � � � � � � � � � � � � 10
2.1 System overview. . . . . . . . . . . . . . . . . . . . . . .10
2.2 Placement . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.3 Connection steps for system . . . . . . . . . . . . . . .11
2.4 Installation steps for system/systems. . . . . . . . . .15
2.5 Modification of system(s) . . . . . . . . . . . . . . . . .22
3 Technical Specifications� � � � � � � � � � � � � � � � � � 24
3.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . .24
3.2 Factory settings . . . . . . . . . . . . . . . . . . . . . . .25
4 Appendix � � � � � � � � � � � � � � � � � � � � � � � � � � � 26
A: Menu system . . . . . . . . . . . . . . . . . . . . . . . . .26
B: How it works . . . . . . . . . . . . . . . . . . . . . . . . .31
C: PSU and feeder cable . . . . . . . . . . . . . . . . . . . .35
5 Warranty � � � � � � � � � � � � � � � � � � � � � � � � � � � 36

DEVIreg™ 850 IV
3Installation instruction
1 User Manual
1�1 System overview
The DEVIreg™ 850 IV system is capable of keeping outdoor areas free of ice and snow.
The DEVIreg™ 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 dam-
age. 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 entranc-
es, 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

DEVIreg™ 850 IV
Installation instruction4
When more than 1 area is controlled by the DEVIreg™ 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 DEVIreg™ 850 is fully automatic and operated digitally by means of the intelligent
sensors located in the heated terrain. Each sensor measures both temperature and mois-
ture, and the system turns the heating elements on and off based on these readings. 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 sen-
sors used for the DEVIreg™ 850 also provide the most exact readings when compared
with corresponding analogue systems. The result is optimum functionality and low en-
ergy consumption.
For more information about the ice and snow melting function of the DEVIreg™ 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 measurements
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 sensors are
recommended.
For more information please refer to the sensor manual.

DEVIreg™ 850 IV
5Installation instruction
1�2 General use
The DEVIreg™ 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
delete installed systems (In case of insolvable
problems 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 tempera-
ture is above the melting temperature.
This icon is shown, when the system has detected snow or ice, and the tempera-
ture is below the melting temperature.
The DEVIreg™ 850 can simultaneously control up to 2 different systems. These 2 systems
are referred to as System A and System B. The DEVIreg™ 850 gives the user the opportu-
nity to view the current status of the systems. The status can be shown in 2 different ways.

DEVIreg™ 850 IV
Installation instruction6
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 DEVIreg™ 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 possibilities 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 system”.
System
B
System
A
5s
5s
Only visible when System B is installed !
 
 
 

  

 

 

  
 
 

  
 
 

  


DEVIreg™ 850 IV
7Installation instruction
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 DEVIreg™ 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 DEVIreg™ 850 alarms
the user. At the same time the DEVIreg™ 850 automatically switch-
es the system to“Constant Off”mode, and user interaction with the
DEVIreg™ 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 DEVIreg™ 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 DEVIreg™ 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.

DEVIreg™ 850 IV
Installation instruction8
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 DEVIreg™ 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 sensi-
tive 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 DEVIreg™ 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).

DEVIreg™ 850 IV
9Installation instruction
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 DEVIreg™ 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.

DEVIreg™ 850 IV
Installation instruction10
2 Installer Manual
2�1 System overview
The DEVIreg™ 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 DEVIreg™ 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.
A typical ice and snow melting system consists of:
• DEVIreg™ 850
• Only 1 DEVIreg™ 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).

DEVIreg™ 850 IV
11Installation instruction
2�2 Placement
The DEVIreg™ 850 and power supply are designed for DIN rail mounting. When mount-
ing please be aware of the following conditions:
The DEVIreg™ 850 is designed and approved to operate in the temperature
range –10 °C to 40 °C.
The DEVIreg™ 850 is only IP20 protected, thus not water resistant.
The installer must ensure proper enclosure of the DEVIreg™ 850 according
to national standards (electrical safety).
2�3 Connection steps for system
Only authorized personnel is allowed to install the DEVIreg™ 850.
When wiring up the DEVIreg™ 850 and sensors, please be aware of the following
conditions:
When the DEVIreg™ 850 is used in a dual system configuration, it is prefer-
able 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 DEVIreg™ 850 and refer to figure B–G for a guideline to connect the heat-
ing elements to DEVIreg™ 850.
1. Connect heating cables to the DEVIreg™ 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 DEVIreg™ 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.

DEVIreg™ 850 IV
Installation instruction12
DEVIreg™ 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 DEVIreg™ 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 DEVIreg™ 850 IV

DEVIreg™ 850 IV
13Installation instruction
Installer Manual
230 V cables, 1–3 P/1–3 loads — System A
DEVIreg™ 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
DEVIreg™ 850 IV
230 V cables
Fig� B Fig� C

DEVIreg™ 850 IV
Installation instruction14
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
DEVIreg™ 850 IV
400 V cables
400 V cables, 2–3 Phase/1–3 Loads — System B
DEVIreg™ 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
DEVIreg™ 850 IV
230 V cables
Direct connection — System B
DEVIreg™ 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

DEVIreg™ 850 IV
15Installation instruction
2�4 Installation steps for system/systems
The installation of the DEVIreg™ 850 is very easy, and the user is guided through the instal-
lation 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 according
to the system type.
Change setting with key:
Accept setting with key:
General
Power on DEVIreg™ 850 IV WELCOME TO
DEVIREG 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.

DEVIreg™ 850 IV
Installation instruction16
Installation of roof system
The installation of a DEVIreg™ 850 with 1 roof system has been selected.
It is optional if the sensors are connected to the DEVIreg™ 850 before power on or during
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.

DEVIreg™ 850 IV
17Installation instruction
Installation of ground system
The installation of a DEVIreg™ 850 with 1 ground system has been selected.
It is optional if the sensors are connected to the DEVIreg™ 850 before power on or during
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.

DEVIreg™ 850 IV
Installation instruction18
Installation of combi system
The installation of a DEVIreg™ 850 with 1 roof and 1 ground system has been selected.
It is optional if the sensors are connected to the DEVIreg™ 850 before power on or during
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?

DEVIreg™ 850 IV
19Installation instruction
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.

DEVIreg™ 850 IV
Installation instruction20
Installation of dual system
The installation of a DEVIreg™ 850 with 2 roof systems or 2 ground systems has been
selected.
It is mandatory that no sensors or only sensors for System A are connected to the
the DEVIreg™ 850 before power up. Sensors for System B must be connected to the
DEVIreg™ 850 during the installation steps. Connection of the sensors during installation
can either be done using a switch on the DIN-rail or just connect sensor bus of System B
to the already connected sensor bus of System A.
The first installed system (System A) is using the output System A.
The second installed system (System B) is using the output System B.
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. 1 GROUND SENSOR
FOUND. ACCEPT?
Press when all sensors for System A are found…
System A is installed…
SYSTEM A!
INSTALLED
Connect sensors for System B.
Press or wait…
CONNECT SENSORS:
SYSTEM B
System is being scanned to find type of connected
sensors…
SYSTEM B
SCANNING...
Select system type. SYSTEM TYPE:
GROUND
Wait until correct number of sensors for System B
is found. 1 GROUND SENSOR
FOUND. ACCEPT?