OJ Electronics ECD4-1991 All in One DIN Rail Thermostat with Schedule Instructions

: June 1, 2024
: OJ Electronics

Table of Contents

INTRODUCTION
MAINTENANCE
Read User Manual Online (PDF format)
Download This Manual (PDF format)

ECD4-1991 All in One DIN Rail Thermostat with Schedule
Instructions OJ Electronics ECD4-1991 All in One DIN Rail Thermostat
with Schedule

INTRODUCTION

The ECD4-1991 All-in-one is an electronic on/ off thermostat for 1 or 2 NTC sensors located externally.
An All-in-one thermostat for many application types:

Electrical floor heating
Frost protection
Ice and snow melting
Cooling

The thermostat should be DIN rail mounted.
This thermostat can be used as a controller for electric room heating pursuant to EN15500.
IMPORTANT SAFETY INSTRUCTIONS
Warnings
** To avoid electric shock, disconnect the heating system power supply at the main panel before carrying out any work on this thermostat and associated components.
Installation must be carried out by qualified personnel in accordance with appropriate statutory regulations (where required by law).
Installation must comply with national and/or local electrical codes.
Cautions
This instruction must be observed, otherwise the liability of the manufacturer shall be voided.
Any changes or modifications made to this thermostat shall void the liabil- ity of the manufacturer. Maximum product lifetime is achieved if the product is not turned off but set at the lowest possible set point / frost protection when heat is not required.
Notice
The language used in the original documentation is English. Other language versions are a translation of the original documentation.
The manufacturer cannot be held liable for any errors in the documentation. The manufacturer reserves the right to make alterations without prior notice.
Content may vary due to alternative software and/or configurations.
DISPOSAL AND RECYCLING
Environment and recycling
Protect the environment by disposing of the package in compliance with local regulations for waste processing.
Recycling of obsolete appliances
** Equipment containing electrical components must not be disposed of along with domestic waste.
It must be separately collected together with electrical and electronic waste in accordance with current local regulations.
PRODUCT PROGRAMME
ECD4-1991 Thermostat incl. floor sensor
SENSORS & ACCESSORIES
ETF-944/99-H External room sensor
FIG. 1 – INSTALLATION OF THERMOSTAT
The thermostat should be DIN rail mounted.
To prevent loose cables from the fixed installation from coming into contact with the terminal block for the floor sensor, they must be restrained using cable ties.
Connections
Ensure that the main and load cables are connected as shown in the figure. Term.
1: Line (L1) 230 V ±10%, 50/60 Hz
Term. 2: Neutral (L2/N)
Term. 3: Output for control, max. 100mA
Term. 4–5: Load, max. 16 A / 3600 W
Term. 6: Input, night setback (S)*
Term. 7: Input, frost protection (❆)
Term. 8-9: External floor sensor (SELV)
Term. 10-11:External room sensor (SELV)
Term. X: Do not connect
Note: Use a Phillips PH2 or slotted 4×0.8 mm screwdriver. Screws must be tightened to a torque of 0.5 Nm.
FIG. 1A+1B – NIGHT SETBACK / FROST PROTECTION
The thermostat has 2 inputs for night setback and frost protection.
Note: Do not use night setback and frost protection at the same time.
FIG. 2 – MOUNTING OF SENSORS
You can use the thermostat with external sensors for room and/or floor.
The terminals for the sensor contain a safety extra-low voltage (SELV) circuit, allowing the sensor to be placed as close to the floor surface as necessary without the risk of electric shock, should the sensor cable become damaged.
Sensor cable recommendations
The following recommendations apply to all temperature sensor cables:
The sensor cable may be extended with additional two-core cable (max. sensor extension, see technical specification). The two wires from the sensor to the thermostat must be kept separate from high voltage wires/ cables.
Place the sensor cable in a separate conduit or segregate it from power cables in some other way.
Never use two vacant wires in a multi-core cable.
Shielded cable does not connect the shield to earth (PE).
Mounting of external floor sensor
The floor sensor is used for comfort temperature regulation in rooms on the basis of floor temperature.
Insert the cable and sensor into a non-conductive conduit embedded in the floor.
The end of the conduit must be sealed and the conduit placed as high as possible in the concrete layer.
The floor sensor must be centred between loops of heating cable.
FIG. 3 – Mounting of external room sensor
The room sensor is used for comfort temperature regulation in rooms based of the room temperature.
The external room sensor must be mounted on the wall approx.
1.4 – 1.6 m above the floor in such a way as to allow free air circulation around it.
Draughts and direct sunlight or other heat sources must be avoided.
OPERATING THE THERMOSTAT
To turn on the thermostat , push the power slide button up to On “I”. The backlit display will briefly show the logo and then the home screen.
Settings
Allows settings in the menues “Event and User and Engineer settings” to be changed.
Press the center Menu button.
Press arrow < > until you see Event, User or
Engineer settings.
Press OK to enter sub menues.
Read the manual for more information.
Programming
See user manual.
FIG. 4 – TROUBLESHOOTING
If a sensor is disconnected or short-circuited, the heating system is switched off. The sensor can be checked against the resistance table.
Error codes
E0: Internal sensor error. The thermostat must be replaced.
E1: External room sensor short-circuited or disconnected (terminal 10-11).
E2: External floor sensor short-circuited or disconnected (terminal 8-9).
E5: Thermostat overheated. Heating switced off. Thermostat will resume heating when temperatures again are within limits.
Factory reset
Allows factory settings to be restored. Your personal settings will be deleted from the thermostat.
Press the center menu button.
Press arrow until you see Engineer settings and press OK.
Press arrow < > to find Factory reset and press OK
Read the manual for more information.

MAINTENANCE

The thermostat is maintenance free.
APPROVAL AND STANDARDS CE marking
OJ electronics hereby declares under sole responsibility that that the product complies with the following European Parliament directives:

LVD – Low voltage : 2014/35/EU
EMC – Electromagnetic compatibility : 2014/30/EU
RoHS – Hazardous substances: 2011/65/EU and amendment annex II: EU/2015/863
Eco-design frame directive. req. for energyrelated products: 2009/125/EC.
Regulation EU 2015/1188 req. for local space heaters.

UKCA marking
OJ electronics Ltd hereby declares under sole responsibility that the product complies with the following UK legislations:

LVD – The Electrical Equipment (Safety) Regulations 2016
EMC – The Electromagnetic Compatibility Regulations 2016
RoHS – The Restriction of the use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012

Applied standards:
EN 60730-1, EN IEC 60730-2-9.
Classification
Protection from electric shock must be assured by appropriate installation. Must be installed according to the requirements of Class II (reinforced insulation).

TECHNICAL SPECIFICATIONS

Note: *At very low ambient temperatues the display may respond slowly.

EXTERNAL SENSOR

Purpose of control| Measure floor temperature
Method of mounting| In pipe embedded in the floor
Sensor type| NTC (12kOhm)
Max. cable length| 30 m

Note: Please follow the “Sensor cable recommendations”.
CONTACT INFORMATION OJ ELECTRONICS A/S
Stenager 13B · DK-6400 Sønderborg Tel: +45 73 12 13 14 oj@ojelectronics.com · www.ojelectronics.com OJ Electronics ECD4-1991
All in One DIN Rail Thermostat with Schedule - fig