Danfoss DEVIreg 850 IV Data sheet
7. Controls
Data Sheet
DEVIreg™
DEVIreg™ 850 IV
The DEVIreg™ 850 version IV is an advanced thermostat with LED display used for outdoor
ground or roof applications. The sensors provide information about both moisture level and
temperature, resulting in an optimal control of the heating system.
The DEVIreg™ 850 IV can handle up to 2 independent areas, in any of the following combinations:
• Single system for roof or ground (1 system, 1–4 sensors).
• Combination system: 1 ground system and 1 roof system (2 systems, 2–4 sensors total,
min. 1 sensor per system).
• Dual system: either 2 roof systems or 2 ground systems (2 systems, 2–4 sensors total,
min. 1 sensor per system).
In the dual / combination systems it is possible to prioritize between the zones, e.g. if only
a limited power output is available.
Benefits:
• Single, combination or dual
zones
• Up to 4 sensors
• Moisture and temperature
sensing
• Self diagnosing programme
• Safety level adjustment
• Alarm function
Standard compliance:
• EN/IEC 60730-1 (general)
• EN/IEC 60730-2-9 (thermostat)
Approvals:
Type
Operation voltage:
PSU 24 VDC
DEVIreg™ 850 IV
Power consumption, max.:
DEVIreg™ 850 IV
Roof sensor
Ground sensor
Relay resistive load, max.:
System A / B relay
Alarm relay
Inductive load each relay, max.
Sensing unit
Cable specification for terminals max.
Ball pressure test temperature
Pollution degree
Controller type
Storage temperature
IP class
Protection class
Dimensions (H/W/D):
PSU 24 VDC
DEVIreg™ 850 IV
Mounting method
Weight
Versions (languages)
Value
180–250 VAC, 50–60 Hz / 24 VDC
24 VDC ±10%
3 W
8 W (each)
13 W (each)
15 A (3450 W) @ 230 V
2 A @ 230 V
1 A @ 230 V, power factor 0,3
DEVIbus™ connected moisture sensor(s)
1 x 4 mm2 or 2 x 2,5 mm
75 °C
2 (domestic use)
-20 °C to +65 °C
IP 20
Class II -
85 х 73 х 53 mm
85 x 105 x 53 mm
DIN rail
720 g
Latin: GB, CZ, DE, DK, ES, EST, FI, FR, HR, HU,
LT, LV, NL, NO, PL, SCG, SE, SI, SK, TR.
Cyrillic: GB, BG, RO, RU.
2
1 C
Types
Item no. Product name Type
140F1084
140F1085
DEVIreg™ 850 IV Cyrillic with PSU
DEVIreg™ 850 IV Latin with PSU
Without sensors, Cyrillic languages 85 x 105 x 53 -10...+50 °С 5703466210833
Without sensors, Latin languages 85 x 105 x 53 -10...+50 °С 5703466209264
Size, mm
Ambient
temperature
EAN no.
Accessories
Item no. Product name Type Size, mm
140F1086 Roof sensor for DEVIreg™ 850 For DEVIreg™ 850, with sensor tube, cable - 15 m 15 х 24 х 216 -50...+70 °С 5703466209271
140F1087
140F1088
140F1089 Power Supply Unit
19119977 Sensor tube and cap For Ground Sensor DEVIreg™ 850 Ø 93 х 98 -30...+70 °С 5703466208359
Ground sensor for DEVIreg™ 850, 2 pcs.
Ground sensor for DEVIreg™ 850, 1 pc.
For DEVIreg™ 850, with sensor tube, cable - 15 m Ø 93 х 98 -30...+70 °С 5703466209288
For DEVIreg™ 850, cable - 15 m Ø 93 х 98 -30...+70 °С 5703466209714
PSU CP-D 24/2.5 100-240VAC/24VDC DINrail
85 х 73 х 53 -10...+40 °С 5703466209721
Ambient
temperature
EAN no.
Produced by Danfoss ©AI164886464057en-010105
DEVIbus™ sensors
A
A
A
B
B
B
A
A
A
A
A
B
B
A
A
A
A
A
A
A
B
B
B
A
A
B
A
A
DEVIreg™ 850 IV with PSU Ground sensorRoof sensor Sensor tube and cup
for Ground sensor
Connection scheme
white
white
red
black
SensorSensor
white
white
red
black
24 V
G1
-
DC supply
red
black
white
white
13 14 15 16 17 18 19 20 21 22 23 24
DEVIreg™ 850 IV
1 23456789101112
ALARM
2 A 250 V~
System A
15 A 250 V~
System B
15 A 250 V~
System configurations
+
PSU
2,5 A
230 V
~~
180...250 V~
Zone support saves energy
DEVIreg™ 850 lets you divide your area in to 2 zones, e.g. a North and South side. In this way it is possible to save energy, when the South side is
free of ice and snow faster because of the heat from the sun.
Combined system -
one zone for roof (system A),
one zone for ground (system B)
Single zone system for roofs
(system A)
Single zone system for ground
Two zone system for roofs
(systems A and B)
(system A)
Two zone system for ground
(systems A and B)
Produced by Danfoss ©AI164886464057en-010105
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