Devireg 550 Electronic Thermostat Installation Guide

Devireg 550 Electronic Thermostat

Thank you for buying a DEVI product. With this purchase you have obtained a product of the highest quality, designed to give long-lasting comfort at a minimum of environmental impact.

Basics

• The Devireg™ 550 thermostat controls electrical floor heating elements using a built-in and/or external temperature sensor.
• The Devireg™ 550’s adaptive function automatically optimises the unit for the room within a few days after installation and continuously collects updated room data.
• This means improved performance (with compensation for e.g. sudden temperature drops in the room) and precise timing so the selected temperature is achieved at exactly the right time.
• The unit can be operated with or without the built-in timer. When the timer is used, the unit can automatically switch between the set comfort temperature and economy temperature at specific times of day.
• To use the timer, you must first set the day and time and then set the timer.

Safety instructions

• Do not cover the thermostat, e.g. by hanging towels or similar items in front of it! This will impair the unit’s ability to sense and adjust the room temperature correctly.
• This does not apply if the thermostat is configured to use a floor sensor only.
• Do not spill liquids of any kind into the thermostat.
• Do not open, disassemble, or tamper with the thermostat in any way.
• If the thermostat is installed in a place frequented by small children, use the child lock.

Functional Overview

The thermostat is operated by using the button as follows

• Turning clockwise or counter-clockwise to raise or lower values, e.g. when setting the temperature
• Pressing briefly to activate or deactivate the timer or confirm a setting during configuration
• Pressing and holding for a number of seconds to access various settings

Temperature Setting

Operation without timer

• The hour display appears as an unbroken ring with a blinking dot indicating the current time (if set).
• Raise or lower the temperature.
• The set temperature appears on the display.
• The system maintains the set temperature 24 hours a day.
• If the thermostat uses a floor sensor only, the display shows the set temperature on a scale from 1 to 10.
• If you lower the temperature to +5 °C, appears on the display.
• The thermostat maintains a temperature of +5 °C in the room for frost protection.
• If you lower the temperature below +5 °C, the thermostat switches off.
• “OFF” appears on the display.

Changing Battery

• The backup battery saves clock settings when the mains supply is off.
• The battery recharges automatically when the mains supply is on and does not normally need to be changed.

Operating the child lock

• Press and hold the button.
• While holding, turn steadily counter-clockwise, until “COdE” appears on the display.
• Turn clockwise to select “0033”.
• Press to confirm. appears on the display.
• The child lock is on. The thermostat cannot be operated using the button except to switch off the child lock.
• The child lock can be switched off using the same procedure as for switching it on.

Switching the thermostat on and off

The thermostat can only be switched off if the timer is off. The thermostat is on by default.

• If you lower the temperature below +5 °C, the thermostat switches off. Turn vigorously counter-clockwise to achieve this. “OFF” appears on the display.
• If you raise the temperature to +5 °C or above, the thermostat switches on again.

Advanced

Switching the timer on and off

The timer is switched on and off by pressing the button.

When the timer is on:

• appears on the display.
• The hour display shows the set comfort temperature periods for the current day as black segments of dots.
• The current day is shown on the weekday display.
• The system automatically switches between comfort and economy temperatures at the preset times of day.
• The economy temperature never appears on the alphanumeric display. The display consistently shows the set comfort temperature, even during economy temperature periods.

When the timer is off

• The hour display appears as an unbroken ring with a blinking dot indicating the current time (if set).
• The system maintains the set temperature 24 hours a day.

Note

• The thermostat can only be switched off if the timer is off.

Optional Settings

Setting the time and weekday

• Press and hold for 3 seconds. appears on the display.
• Set the correct time.
• A small dot on the hour display shows the currently set time.
• When the set time passes 0:00 in either direction, the weekday display changes to the next or previous day (depending on which direction the button is being turned).
• Press to confirm. disappears from the display.

Setting the timer

• Press and hold for 6 seconds. appears on the display.
• You can now program when the system should switch from comfort temperature to economy temperature and vice versa.

• Select the weekday where you want the program to start.
• Press to confirm.
• Set the starting time of the first comfort temperature period.
• Press to confirm.
• Set the duration of the first comfort temperature period.
• The duration is shown as a segment of black dots on the hour display.

• Press to confirm.
• You have now defined the starting time, duration, and ending time of the first comfort temperature period.
• Repeat as required to define subsequent comfort temperature periods.
• When the set time passes 0:00 in either direction, the weekday display changes to the next or previous day (depending on which direction the button is being turned). In this way it is possible to program an entire week with different comfort and economy temperatures for each day.

• The intervals between the comfort temperature periods become economy temperature periods.
• Press and hold for 3 seconds. disappears from the display.
• The display returns to normal.

Setting minimum floor temperature

(This only applies if the thermostat is configured to use a room and floor sensor.)

• Press and hold for 9 seconds. “MFt” (Minimum Floor Temperature) appears on the display.
• Set the minimum floor temperature.
• Press to confirm. The display returns to normal.
• The floor temperature is kept above the set lower limit.

Troubleshooting

• In case of an error, the hour display starts flashing and the weekday display indicates an error code from 2 to 7.
• Refer to the description of error messages in section 6 of the Installation Manual.
• If the system does not function correctly, call a qualified electrician.

Uninstalling Product

• The product should only be uninstalled by a qualified electrician.

Specifications

Temperature range:	+5 to +35 °C or OFF
Floor temperature limit:	+20 to +50 °C
Operation voltage:	180-250 VAC, 50/60 Hz
Resistive load:	230 V ~ 16A /3680W
Inductive load:	cos ϕ 0,3 = Max. 1A
Power consumption:	< 500 mW
Battery back-up:	100 hours
Economy set-back:	0 to -30 °C
Offset:	-5.5 to +5.5 °C
IP class:	IP30
Sensing unit	NTC 15 kOhm AT 25 °C

Installation overview

Safety instructions

• Make sure the mains supply to the thermostat is OFF before installation. If the thermostat is installed in a network, the mains supply to ALL thermostats in the network must be off!
• As the Devireg™ 550 is not equipped with an earth terminal, the earthing screen of the heating cable and the earthing wire from the mains supply must be connected to the earth terminal in the surface mounted box or recessed metal box.
• Do NOT use the Devireg™ 550 without a floor sensor when the heating element is installed under flooring with high thermal resistance.
• The thermostat must not be exposed to moisture, water, and excessive heat.

Installation guidelines

• Dismantle the thermostat before installation and observe the following guidelines:

• Place the Devireg 550™ at a suitable height on the wall.
• In wet rooms, the thermostat should be installed on an even surface according to local building regulations.
• Place the thermostat at least 50 cm from windows/ doors that will be left open occasionally.
• Do not place the thermostat on a wall where it will be exposed to direct sunlight.
• Do not place the thermostat on the inner side of a wall facing the outside.
• Connect all cables to the terminals.
• Switch on the mains supply.
• Activate and configure the thermostat.

System Overview

Three different sensor configurations

FS: Floor sensor (comfort heating)

• Suitable for floor heating in e.g. bathrooms. The built-in room sensor is not used.
• Comfort heating should be used only to supplement a regular room heating system.

RS: Room sensor (total heating)

• Suitable for control of room temperature in e.g. living rooms. Unsuitable for wet rooms.
• The thermostat must be mounted in the same room as the heating elements.

RFS: Room and floor sensor (total heating)

• Suitable for control of room and floor temperature in e.g. living rooms. Unsuitable for wet rooms.
• The floor sensor monitors the floor temperature, limiting heating element temperature to avoid risk of fire and to protect flooring from excessive temperatures.
• The maximum floor temperature must be set (see section 4.6 below). It is also possible to set the minimum floor temperature (see section 2.1.4 of the User guide).
• The thermostat must be mounted in the same room as the floor sensor and heating elements.

Network

• Up to 32 thermostats can be linked in a network.
• See section 5.1.

Functional Overview

The thermostat is programmed by pressing and holding the button as follows:

Seconds held	Function accessed	Notes
3	Time and weekday setting
6	Timer setting
9	Minimum floor temperature setting	Only when configured to use room and floor sensor
12	Basic settings

Installation – step by step

Preparations and guidelines

• All necessary cables should be routed to the intended installation point.
• The thermostat is designed for installation in a surface-mounted box or recessed box with the correct dimensions.
• Read and observe the guidelines set forth in section 1.1 and 1.2.

Dismantling the thermostat

• Push down the release tab.
• Carefully detach the front cover.

• Remove the two screws.
• Carefully detach the display module. The module must be pulled straight out to avoid damaging the 8-pin connector plug on the back of the module!
• Carefully detach the frame.

Connecting cables

• Connect the cables as shown below.
• Connect wires in heating element and mains supply cables correctly!
• Important: Connect the heating cable screen and the mains supply earthing wire to the mounting box earthing terminal.

Mounting and reassembling the thermostat

• Mount the base plate on the wall.
• Make sure the base plate cannot be moved.
• Install the frame, display module, and front cover in the reverse order of disassembly.
• Install the display module carefully!
• Do NOT over-tighten the mounting screws on the display module.

Activating the thermostat

• Switch on the mains supply.
• The unit switches on automatically.
• If the unit has never been activated before, configure basic settings as described in section 4.6.

Configuring basic settings

• You can access and configure basic settings at any time by pressing and holding the button for 12 seconds, entering code 0044 and changing the parameters as required.
• If the button is not operated for approximately 60 seconds, the thermostat automatically exits without storing any changed values.

• Turn clockwise to select “0044”.
• Press to confirm.

Select network status of the thermostat:

• MAS: Master
• SLA: Slave
• ALO: Independent (or network not used)
• See descriptions of the possible network configurations in section 5.1.
• If a network is not used, choose ALO.
• Press to confirm.
• The adaptive function of the Devireg™ 550 can be switched off.

Select status for adaptive function:

• AdAP: Adaptive function on
• OFF: Adaptive function off
• Press to confirm.

Select the desired sensor configuration:

• rFS: Room and floor sensor
• FS: Floor sensor
• RS: Room sensor
• See descriptions of the possible sensor configurations in section 2.1.
• Press to confirm.

• Select the desired maximum floor temperature.
• (This does not apply if the thermostat is configured to use a room sensor only.)
• Press to confirm.
• To protect the cables, the maximum floor temperature is factory preset to 35 °C.

Notice: The floor temperature is measured where the sensor is placed. The temperature of the bottom of a wooden floor can be up to 10 degrees higher than the top. Floor manufactures often specify the max. temperature on the top surface of the floor. Please contact your floor supplier for maximum surface temperature.

• The temperature display can be calibrated (offset) so the thermostat shows the same temperature as another thermometer in the room.
• (This does not apply if the thermostat is configured to use a floor sensor only.)
• Select the desired offset value.
• Press to confirm.
• Setting the offset value only recalibrates the thermostat’s temperature reference point and does not adjust heating element power.
• If a thermometer and the thermostat display very different temperature readings, one of the units is probably faulty and should be repaired or replaced.

• The economy set-back level governs how much the temperature is lowered during economic periods.
• Select the desired setback level.
• (Choose -5 °C if the temperature is to be lowered by 5 degrees).
• Press to confirm.
• If normal room heating is installed, we recommend lowering the temperature by no more than approx. 5 °C during economy periods.
• Press to save the settings.
• The display returns to normal.

Optional settings

Network setup

• Each network must contain one (and only one) master unit (MAS).
• All other units must be either slave units (SLA) or independent units (ALO).
• Independent units in the network will not respond to or send information to a master unit. However, they still count towards the network maximum of 32 units.
• The following settings on all slave units are controlled from the master unit. All other settings must be configured on each thermostat.
  • Time
  • Weekday
  • Economy set-back
• Network cables are unshielded, untwisted, and unpolarised two-wire cables for easy installation.
• Maximum network cable length is 100 m (0.75 mm2 wire cross-section) or 500 m (1.5 mm2 wire cross-section).
• The thermostat network can be controlled remotely using e.g. WEB•HOME™ or Devicom™ PC Pro. Further information on how to connect and use these products can be found in the respective user guides.

Trouble-Shooting Diagram

Error code	Problem	Solution
1	The thermostat is configured as master in the local network but has detected another master	Reconfigure one of the master thermostats as slave or independent.
2	The thermostat is configured as slave in the local network but cannot detect a master	Reconfigure one of the thermostats as master, or configure all units as independent.
3	The thermostat was switched off because of overheating	Allow the thermostat to cool down, and then access basic settings to reset the error. Check the wiring if this error appears again. Replace the thermostat if the error does not disappear
4	Short circuit in floor sensor	Check the sensor connected to the thermostat. Disconnect the sensor cables and test them. Replace the sensor if it is faulty. Replace the thermostat if the error keeps appearing
5	Open circuit in floor sensor	Check the sensor connection to the thermostat. Disconnect the sensor cables and test them. Replace the sensor if it is faulty. Replace the thermostat if the error keeps appearing
6	The clock and weekday have not been set	Set the clock and weekday. This error usually appears: If the clock has not been set and the timer is activated If the thermostat has been unplugged from the supply voltage for more than 4 days and the backup battery is depleted If the thermostat is unplugged from the power supply, and the backup battery has not accumulated enough power (takes approx. 16 hours)

Factory Settings

Item	Factory setting	Options
Network type	Alone (ALO)	Independent (ALO) Master (MAS) Slave (SLA)
Adaptive function	On (AdAP)	On (AdAP) Off (OFF)
Sensor	Room + floor sensor (FS)	Floor sensor (FS) Room sensor (RS) Room + floor sensor (FS)
Max. floor temperature	+35 °C	+20 to +50 °C
Offset	0 °C	-5.5 to +5.5 °C
Economy set-back	-5 °C	-1 to -30 °C
Weekday	1	1 to 7
Time	Not set	Normal 24 hour clock
Timer	Not set	Up to 336 settings/week

Warranty

The 2-Year DEVI Warranty

You have purchased a Devireg™ 550 thermostat, which forms an integrated part of a Deviheat™ system, which we are certain will improve your home comfort and economy. Deviheat™ provides complete heating solutions with Deviflex™ heating cables or Devimat™ heating mats, Devireg™ thermostats and Devifast™ fitting bands.

If, however, contrary to all expectations, a problem should occur with your heating system, we at DEVI, with manufacturing units in Denmark, are, as European Union suppliers, subject to general product liability rules, as stated in Directive 85/374/CEE, and all relevant national laws which implies that:

DEVI provides a warranty for Deviflex™ heating cables and Devimat™ heating mats for a 10 year period and all other DEVI products for a 2 year period against defects in material and production. The guarantee is granted on the condition that the WARRANTY CERTIFICATE on the overleaf is filled out properly in accordance to instructions and that the defect is inspected by, or presented to, DEVI or authorised DEVI distributor. Please note that the wording of the WARRANTY CERTIFICATE must be provided in English or local language with the ISO code for your country in the upper left corner of the front page of the installation instructions in order to release the warranty. The obligation of DEVI will be to repair or supply a new unit, free of charge to the customer, without secondary charges linked to repairing the unit.

In case of defective Devireg™ thermostats, DEVI reserves the right to repair the unit free of charge and without unreasonable delay to the customer. The DEVI warranty does not cover installations made by unauthorised electricians, or faults caused by incorrect designs supplied by others, misuse, damage caused by others, or incorrect installation or any subsequent damage that may occur. If DEVI is required to inspect or repair any defects caused by any of the above, then all work will be fully chargeable. The DEVI warranty is void, if payment of the equipment is in default. At all times, we at DEVI will respond honestly, efficiently and promptly to all queries and reasonable requests from our customers. The above-mentioned warranty concerns product liability whereas matters in relation to legislation on sale of goods shall be referred to national law.

2-YEAR WARRANTY Warranty Certificate

The DEVITM Guarantee is granted to:

• Name: ………………………..
• Address: ………………………..
• City: ………………………..
• Country: ………………………..
• Telephone: ………………………..

Attention:

• The Warranty Certificate must be completed correctly for the Warranty to be valid.
• Please read the Warranty conditions on the previous page.

1. Type of thermostat: …………………………
2. Electrical installation by: …………………………
3. Material number: …………………………
4. Date: …………………………
5. Suppliers Stamp: ………………….
6. Date: ………………….

Article No: 08095121
Version: 04.01

CONTACT

DEVI A/S

• Ulvehavevej 61 DK-7100 Vejle
• Tel: +45 74 88 85 00
• Fax: +45 74 88 85 01
• www.devi.com

Reference

Download Manual:

Devireg 550 Electronic Thermostat Installation Guide

Devireg 550 Electronic Thermostat Installation Guide