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What is the DANFOSS DEVI DEVIREG 531 and what are its primary functions?
The DANFOSS DEVI DEVIREG 531 is an electronic thermostat equipped with a room sensor and a 2-pole switch designed to measure and control air temperature. This device can be installed using either a surface-mounted or flush-mounted method. It features a control button for temperature adjustment ranging from 5 degrees Celsius to 35 degrees Celsius.
What do the LED indicator lights on the DANFOSS DEVI DEVIREG 531 signify?
The DANFOSS DEVI DEVIREG 531 uses a LED indicator to communicate its current operating status:
A green light indicates that the thermostat is in a standby period.
A red light indicates that the thermostat is currently in a heating period.
What are the technical specifications for the DANFOSS DEVI DEVIREG 531?
The technical specifications for the DANFOSS DEVI DEVIREG 531 are as follows:
| Operation voltage | 220-240 V~, 50 Hz |
| Standby power consumption | Max 0.25 W |
| Relay: Resistive load | Max 15 A / 3450 W @ 230 V |
| Relay: Inductive load | cos phi= 0.3 max 1 A |
| Sensing units | NTC 15 kOhm at 25 degrees Celsius |
| Hysteresis | +/- 0.2 degrees Celsius |
| Ambient temperature | -10 to +30 degrees Celsius |
| Frost protection temperature | 5 degrees Celsius |
| Temperature range | 5-35 degrees Celsius with room sensor |
| Cable specification max | 1 x 4 mm2 or 2 x 2.5 mm2 |
| Ball pressure temperature | 75 degrees Celsius |
| Pollution degree | 2 (domestic use) |
| Type | 1C |
| Storage temperature | -20 to +65 degrees Celsius |
| IP class | 31 |
| Protection class | Class II |
| Dimensions | 85 x 85 x 36 mm |
| Weight | 90 g |
What are the sensor resistance values for the DANFOSS DEVI DEVIREG 531 at different temperatures?
The sensing values for the DANFOSS DEVI DEVIREG 531 are:
| Temperature | Resistance Value |
| 0 degrees Celsius | 42 kOhm |
| 25 degrees Celsius | 15 kOhm |
| 50 degrees Celsius | 6 kOhm |
What safety instructions must be followed when installing the DANFOSS DEVI DEVIREG 531?
When installing the DANFOSS DEVI DEVIREG 531, adhere to the following safety requirements:
Ensure the mains supply to the thermostat is turned off before starting the installation.
If the thermostat is used to control a floor heating element under a wooden floor or similar material, you must always use a floor sensor and never set the maximum floor temperature higher than 35 degrees Celsius.
The installation must be performed by an authorized and qualified installer in accordance with local regulations.
The thermostat must be connected to a power supply through an all-pole disconnection switch.
Always connect the device to a continuous power supply.
Do not expose the thermostat to moisture, water, dust, or excessive heat.
Where is the best location to mount the DANFOSS DEVI DEVIREG 531?
For correct operation of the DANFOSS DEVI DEVIREG 531, follow these placement guidelines:
Place the thermostat at a suitable height on the wall, typically between 80cm and 170cm.
In wet rooms, ensure the placement complies with local regulations regarding IP classes.
Do not install the thermostat on the inner side of an exterior wall.
Always install the device at least 50cm away from windows and doors.
Avoid placing the thermostat in a position where it will be exposed to direct sunlight.
How do I open and mount the DANFOSS DEVI DEVIREG 531 thermostat?
Follow these steps to mount the DANFOSS DEVI DEVIREG 531:
Step 1. Open the thermostat: Press the release tab located at the bottom of the thermostat using a flat object. Carefully detach the front cover and then carefully detach the frame.
Step 2. Connect the thermostat: Follow the provided connection diagram. Ensure the screen of the heating cable is connected to the earth conductor of the power supply cable using a separate connector. If using a floor sensor, always install it in a conduit in the floor.
Step 3. Mount and reassemble: Fasten the thermostat to a socket or an exterior wall box by driving screws through the holes on each side of the device. Install the frame and front cover in the reverse order of how they were disassembled.
Step 4. Power on: Turn on the power supply to the unit.
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