Kospel EKCO.M3 & EKCO.MN3 Electric Boilers

Explanation of Symbols

⚠️ Warning: Follow safety instructions carefully to avoid injury and damage.

❗ Danger: This symbol warns of the risk of injury.

❗ Note: This symbol warns of property damage and environmental pollution.

? Tip: Text marked with "Tip" contains additional information.

Target Audience

This manual is intended for product users. The product can be used by children aged 3 and above, and persons with physical, sensory, or mental deficiencies, or inexperienced users, provided they have received instructions for safe operation and understand the associated risks. This product is not a toy. Children can clean and maintain this product only under adult supervision.

Only qualified electricians are permitted to repair electrical components. The initial installation of this product must be performed by an installer or a designated authorized person.

Applicable Legislation and Regulations

• National electrical wiring and plumbing installation codes.
• Occupational health and safety regulations as defined by law.
• Environmental protection regulations as defined by law.
• Regulations of professional and insurance associations.
• National applicable safety regulations.

Safety Instructions

General Safety:

• Familiarity with this manual ensures correct installation and long-term, reliable operation.
• Do not install shut-off valves (e.g., stopcocks) on the outlet of the safety valve. An optional drain fitting should be installed as shown.
• The device is intended exclusively for installation on a flat wall.
• Do not install in wet rooms, areas prone to explosion, or where ambient temperature can drop below 0°C.
• Boiler installation and electrical/hydraulic connections must be entrusted to a specialized service company, strictly following the product's installation and operation instructions.
• All installation work must be performed with the electrical and water supply turned off.
• The electrical installation must be equipped with residual current protection devices and means for disconnecting the device from the power source, with a contact pole separation of at least 3 mm.
• The boiler is sensitive to overvoltage; the electrical installation must include surge protection devices.
• The boiler's power supply point must have an updated test confirmed by a protocol.
• Water should not be drained from the central heating (CH) system after the heating season.
• During the break between heating seasons, the controller should remain in standby mode, and the boiler's power supply should not be interrupted. This minimizes energy consumption. Failure to follow this recommendation may lock the circulation pump's motor.

⚠️ Danger: Incorrect connection work can lead to fatal accidents. Work on the devices can only be performed by a qualified installer.

Working with this product:

• The device must be installed according to national installation regulations.
• Electrical installation must comply with PN-IEC 60364 and be functional during startup and use.
• Heating installation equipped with a diaphragm expansion vessel according to PN-B-02414:1999 - closed system.
• The heating system must be thoroughly flushed before boiler installation.

❗ Note: The device can only be used when correctly installed and in perfect technical condition.

Product Overview

The EKCO.M3 and EKCO.MN3 electric central heating boilers are designed for heating domestic spaces equipped with underfloor heating systems using water or antifreeze as the heat transfer medium. The boiler should be selected based on the building's thermal balance.

The boiler is a low-temperature type, operating in closed water heating systems with forced water circulation, compliant with PN-B-02414:1999. It can also operate in open water heating systems with forced water circulation, compliant with PN-B-02413:1991. The boiler operates in an automatic cycle with minimal operational duties.

Intended Use

The device is intended exclusively for domestic or similar use. Commercial or industrial use leading to excessive device operation is contrary to its intended purpose. Improper use or negligent handling voids the manufacturer's warranty. Improper use includes altering the intended function of the heating system components.

? Tip: The device is designed for domestic or similar use, meaning even untrained individuals can operate it safely.

Main Product Features

The device is equipped with several safety features to protect against installation-related faults:

• Water flow control system
• Internal temperature regulator
• Thermal cutout
• Safety valve

The boiler is equipped with: circulation pump, pressure sensor, diaphragm expansion vessel (for EKCO.MN3 only), automatic air vent, and safety valve.

Construction

The boiler's internal components include:

• Base [1]
• Power cable entry opening [2]
• Terminal strip [3]
• Thermal safety switch [4]
• Boiler inlet temperature sensor [5]
• Power supply unit [6]
• Circulation pump [7]
• Pressure sensor [8]
• Inlet connection [9]
• Automatic air vent [10]
• Heating element [11]
• Control panel [12]
• Diaphragm expansion vessel (for EKCO.MN3) [13]
• Boiler outlet temperature sensor [14]
• Safety valve [15]
• Outlet switch [16]
• Drain funnel [17]

Assembly and Installation

General Installation:

1. Install the boiler vertically on a flat wall using fixing screws or the included bracket, with outlets facing downwards. Maintain minimum distances from walls and ceiling. Fasteners must be adapted to the substrate type, considering the device's weight.
2. Connect the boiler to the central heating system equipped with shut-off valves. Valves should be located directly on the boiler.
3. Fill the central heating system with water or antifreeze suitable for central heating systems, which significantly affects the heating elements' durability.
4. Vent the central heating system.
5. Connect the boiler to the electrical installation as described on page 9.
6. Install and connect the room temperature sensor (Tr) and outdoor temperature sensor (Tos) as described on page 11.
7. After completing the above steps, start the boiler, set the language and maximum boiler output, and perform pump venting [Configuration > Pump > CH venting / DHW venting].
8. Set the maximum medium temperature in the installation [Configuration > Central heating > Max. boiler temp.].
9. Adapt the boiler's operation to the building's heating system and user preferences – refer to the Settings and Configuration chapters.

Installation Notes:

The EKCO.MN3 boilers are equipped with a 5-liter expansion vessel (1.5 bar pressure). This vessel is sufficient for the following heating system capacities at given medium temperatures and central heating system pressures:

If the liquid capacity of the central heating installation is larger, an additional expansion vessel must be installed according to the applicable standard.

Connecting the Boiler to the Central Heating System

Diagrams illustrating the connection of the boiler to the central heating system are provided, showing various components such as:

• PI - Manometer
• ZK - Shut-off valve
• RW - Expansion pipe
• NW - Integrated expansion vessel (EKCO.MN3)
• NW1 - Expansion vessel
• ZT - Thermostatic valve
• ZP - Bypass valve
• F - Filter
• G - Radiator
• ZS - Drain valve
• TWV - Triple valve
• ZAS - ZNY Tank
• Tr - Room temperature controller
• Tcyl - DHW tank temperature sensor
• Tos - Outdoor temperature sensor

The filter must be installed so that the flow direction of the heating medium matches the arrow cast on the casing, with the cover at the bottom. Filters can be installed in horizontal or vertical pipes. It is recommended to use shut-off valves immediately before and after the filter for easier cleaning and replacement of the filter insert.

Boiler Connection Diagrams to Electrical Installation

Depending on the purchased boiler model and the space's electrical installation, the boiler must be connected according to the following diagrams:

• Single-phase 230V 1N~ Connection: Shows connections for neutral, protective, and phase conductors, temperature limiter, and additional conductors (for single-phase systems only).
• Three-phase 400V 3N~ Connection: Shows connections for neutral and protective conductors, phase conductors, and temperature limiter.
• Three-phase 230V 3~ Connection: Shows connections for phase conductors and temperature limiter.

Boiler Configuration

Before powering on, ensure the switch settings are compatible with the boiler model and installation type.

Switch Settings and Nominal Power/Installation Type:

• 12 / 16 / 20 / 24 kW, three-phase 400V 3N~: Switch settings 1-OFF, 2-OFF, 3-OFF
• 4 / 6 / 8 kW, three-phase 400V 3N~: Switch settings 1-OFF, 2-OFF, 3-ON
• 2 / 4 / 6 / 8 kW, single-phase 230V 1N~: Switch settings 1-OFF, 2-ON, 3-OFF
• 7 / 9 / 11 / 14 kW, single-phase 230V 1N~: Switch settings 1-OFF, 2-ON, 3-ON
• 9 / 12 / 15 / 18 kW, three-phase 230 3~: Switch settings 1-ON, 2-OFF, 3-OFF

Operation Settings:

• Boiler EKCO.M3 in standalone or master cascade operation: Switch settings 1-ON, 2-OFF
• Boiler EKCO.M3 in slave cascade operation (EKCO.S3): Switch settings 1-OFF, 2-OFF

Connecting External Control Signals

❗ Note: Do not connect any voltage to the FN, MA, RT, Tcyl, Tos, Tr inputs! This can cause permanent damage to the controller.

Input Symbol and Function:

• FN: External temperature change override or operating algorithm [Configuration > Entry FN]. Used to limit power when cooperating with other devices like an electric water heater.
• MA: For power limitation. An electrician must install an additional normally open contact in series with the MA input. When a main device is activated, the contact opens, deactivating the boiler and stopping the pump.
• RT: Optional room thermostat control. Activating the RT input [Configuration > Room temp. > Temp. sensor: RT] by short-circuiting the free contact enables central heating. Internal room controller functions (including timer) are deactivated. If the CH configuration is set to a heating curve, it will adjust to 22°C.
• Tcyl: DHW tank temperature sensor. Can be replaced by an external contact thermostat. Activate the external DHW thermostat [Configuration > DHW cylinder > Regulation: Tcyl Outside]. Short-circuiting the Tcyl input activates DHW heating. When an external DHW regulator is activated, built-in timer and temperature regulator functions are unavailable.
• Tos: Outdoor temperature sensor. Must be installed in a shaded area, on the north or northwest facade of the building, away from windows and fans.
• Tr: Room temperature sensor. Must be installed in a representative location in the room, away from radiators, windows, doors, and traffic routes.

RS485 Communication Bus

Diagrams show connections for the C.MI2 internet module, C.MG3 heating module, and cascade boiler systems.

❗ Note: Each device connected to the communication bus must have a unique identification number (except C.MI2). The maximum number of devices that can be parameterized in the system is 32.

Actuator Connections

• PUMP.C: Circulation pump for domestic hot water (DHW). Refer to diagrams and settings.
• TWV: Three-way valve connection. Depending on the actuator control type (SPDT or SPST), select the appropriate valve connection diagram and set the valve control accordingly [Configuration > DHW cylinder > Control: A-CH B-DHW / A-DHW B-CH].

Control Panel

The control panel consists of:

• [1] Display: Shows operating modes and parameters.
• [2] Navigation switch: Used to navigate through menus and select options.
• [3] Function switch: Used to select operating modes (standby, CH, DHW, CH+DHW).

Main Screen:

The main screen displays:

• Error indicator (ERR)
• Heating status (CH, DHW, buffer loading)
• Current time and date
• Room temperature
• Outdoor temperature
• DHW tank temperature

Error Indication: The boiler error is indicated by the ERR icon on the main screen. Pressing the navigation switch [2] displays the list of detected errors.

Heating Programs

The boiler allows for setting daily and weekly heating programs for both central heating (CH) and domestic hot water (DHW).

• CH Program: Allows setting up to 5 time periods per day for CH temperature control.
• Buffer Load Program: For buffer operation, allows setting up to 5 time periods for buffer charging.
• DHW Program: For DHW systems, allows setting up to 5 time periods for DHW temperature control.

Turbo Operation:

Turbo mode provides rapid heating by using maximum parameters until the set room temperature is reached. It can be activated automatically if the room temperature drops below a set threshold or manually via the quick modes menu. DHW priority can be disabled during Turbo operation.

Frost Protection:

The building frost protection function prevents significant cooling of the building. The CH system activates if the outdoor temperature drops below 2°C or the room temperature drops below 5°C. This function is deactivated if the boiler is controlled by an external room controller connected to the RT input.

Technical Data

Boiler Specifications:

Product Disassembly

Disassembly of the central heating boiler must be performed in the reverse order of assembly described on page 7.

Package Contents

• Electric boiler: 1 pc.
• Hanger: 1 pc.
• Fixing screws: 2 sets
• Flanges: 2 pcs.
• Fuse: 1 pc.
• Sensor WE-027: 1 pc.
• Sensor WE-033/02: 1 pc.
• Drain funnel: 1 pc.
• Warranty card: 1 pc.
• User manual: 1 set.

Packaging Disposal

This product bears the WEEE symbol, indicating it should not be disposed of with mixed household waste. Return the product to a WEEE collection point for recycling. Proper disposal prevents potential environmental harm.

For more information on recycling, contact local authorities, waste management organizations, or the original seller.

Declaration of Conformity: Standards and Reference Directives

KOSPEL Sp. z o.o. declares that the Electric Boilers mentioned in this manual comply with the requirements of the Directives and relevant safety standards for electrical appliances for domestic use: LVD (2014/35/EU) and EMC (2014/30/EU). The products are marked with the CE symbol.

The full text of the declaration of conformity is available on the manufacturer's website: www.kospel.pl.