KOSPEL EKCO.L3/EKCO.LN3 Electric Central Heating Flow Boiler

Important Safety Information

⚠️ Safety Precautions for Use: This appliance can be used by children aged from 3 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.

♻️ Recycling Information: Used product cannot be treated as general communal waste. Disassembled appliance must be delivered to the collection point of electrical and electronic equipment for recycling. Appropriate utilization of used product prevents potential negative environmental influences that may occur as a result of inappropriate handling of waste. For more detailed information about recycling this product, contact the local government unit, waste management service, or the shop where the product was purchased.

Safety Instructions

1. Read and strictly follow the installation and operating instructions to ensure a long life and reliable boiler operation.
2. Ensure an efficient electrical installation completed in accordance with binding norms of electric installation.
3. The central heating system must be equipped with an appropriate expansion vessel completed in accordance with binding norms of hydraulic installation.
4. Rinse the heating installation thoroughly before installing the boiler.
5. Do not install any barrier fittings (e.g., valves) on the outlet of the safety valve.
6. The boiler must be installed on a flat surface.
7. The boiler must not be installed in a humid place, in a place exposed to the danger of explosion, or in which the temperature may drop below 0°C.
8. Boiler installation and all electrical and hydraulic work must be performed by a qualified professional installer in accordance with the manufacturer's instructions.
9. All installation work must be performed when the power and water supply are turned off.
10. Electric installation should be equipped with residual current protective devices and other solutions that ensure disconnecting the heater from the power source (intervals between all poles should not be less than 3 mm).
11. The boiler is preset by the manufacturer to work with the central heating system. Change the factory settings in the advanced settings to switch to cooperation with a DHW Cylinder.
12. The electronically controlled boiler is a sensitive device to electrical surges; therefore, the electrical installation must contain surge protection devices.
13. Do not drain the water from the central heating system after the heating season.
14. Leave the controller in stand-by mode and do not cut off power supply between heating seasons.

Installation Notes

EKCO.LN3 boilers are equipped with an expansion vessel (capacity: 5l, pressure: 1.5bar). The expansion vessel is sufficient for the following capacities of the heating system at given temperatures of the medium and central heating system pressure.

If the capacity of the wet central heating installation is larger, an extra expansion vessel should be installed as applicable in accordance with binding norms.

Boiler connection to the central heating system

Diagram shows a schematic of the boiler connected to a central heating system. Components include the boiler unit, an expansion vessel (NW), a radiator (G), and a room temperature sensor (RT). Pipes are labeled with component codes like RW (expansion pipe), ZK (cut-off valve), F (filter), ZS (drain valve), ZT (thermostatic valve), ZP (passage valve).

Key for diagram components:

• PI - manometer
• ZK - cut-off valve
• RW - expansion pipe
• NW - built-in expansion vessel
• NW1 - expansion vessel
• ZT - thermostatic valve
• ZP - passage valve
• F - filter
• G - radiator
• ZS - drain valve
• Z3D - three-way valve
• ZAS - DHW Cylinder
• TWV - three-way valve
• RT - alternative room temperature sensor
• Tcyl - DHW cylinder temperature sensor

The filter should be installed so that the heating medium flow direction matches the arrow on the hull, and the cover is at the bottom of the filter. Filters can be mounted on horizontal and vertical pipelines. It is recommended to use shut-off valves immediately behind and ahead of the filter to facilitate cleaning or replacing the filter insert.

Assembly and Installation

1. Hang the boiler up in a vertical position using fixing screws or the attached hanger, with inlet and outlet pipes pointing downwards, maintaining clearances from walls and the ceiling.
2. Connect the boiler to the central heating system, ensuring it is equipped with cut-off valves.
3. Fill the central heating system with treated water or non-freezing liquid, which influences the durability of immersion heaters.
4. Vent the central heating system.
5. Connect the boiler to the electrical system.
6. Assemble and connect the room regulator sensor and other cooperating devices according to the "Connection point external sensors and devices" section.
7. After completing the above steps, start the boiler, set the boiler language, and maximum output. Vent the pump via [CONFIGURATION > PUMP > VENTING > TURN ON].
8. Set the maximum temperature factor in the installation via [CONFIGURATION > CENTRAL HEATING > MAX BOILER TEMP.].

Diagram shows the dimensions of the boiler unit. Height: 716 mm. Width: 316 mm. Depth: 191 mm (EKCO.L3) or 235 mm (EKCO.LN3). Minimum clearances are indicated: 150 mm from the bottom, 60 mm from the side, and 50 mm from the top and sides for ventilation.

Electrical Connections

Boiler Power Ratings:

• 2, 4, 6, 8 kW models operate on 230V 1N~.
• 4 to 24kW models operate on 400V 3N~.

Connection to one-phase electrical system 230V 1N~

Diagram illustrates the connection of a one-phase system. It shows the boiler's internal terminals labeled L, N, PE, and connection points for temperature limiter [1] and additional conductors [2]. PNL indicates connection points for neutral, protective, and phase conductors.

Connection to the three-phase electrical system 400V 3N~

Diagram illustrates the connection of a three-phase system. It shows the boiler's internal terminals labeled L, N, PE, and connection points for temperature limiter [1]. PNL indicates connection points for neutral and protective conductors, and PF indicates connection points for phase conductors.

Selecting the Type of Power Supply Installation

Use switch no. 3 to select the electrical installation type: three-phase or one-phase.

Note: Switches 1 and 2 must not be adjusted! Save the factory settings.

Wiring diagram showing connections for master appliance (MA), room temperature sensor (RT), DHW cylinder temperature sensor (Tcyl), three-way valve (TWV), and circulation pump (PUMP.C). The output terminal block shows connections for M.SUPPLY, PUMP.C, TWV, and PUMP, with color-coded wires (brown, black, blue) connecting to the circulation pump.

Component Labels:

• MA - master appliance
• RT - alternative room temperature sensor
• Tcyl - DHW cylinder temperature sensor
• TWV - the place of assembly three-way valve
• PUMP.C - the place of circulation pump assembly

⚠️ Do not connect any voltage into MA, RT, Tcyl entries! This can result in permanent controller damage.

Component Explanations

Tcyl – DHW cylinder temperature sensor

The connection cable of the temperature sensor should be as short as possible and not routed in close proximity to power cords or twisted with other cords. The DHW cylinder temperature sensor can be optionally replaced by a thermostat. To do this, switch the input type to Tcyl [CONFIGURATION > DHW TEMPERATURE > REGULATION > OUTSIDE] and connect the NO contacts of the thermostat to the Tcyl terminals.

MA - Master appliance (entry MA)

To limit power usage, the boiler can cooperate with other appliances, such as an electric water heater. An electrician should install an extra open contact to the MA entry (voltage-free entry). When the master appliance is active, this contact opens, switching off the boiler and stopping the pump.

RT - Room temperature regulator

Optional control of boiler operation based on room temperature. The RT entry should be activated [CONFIGURATION > ROOM TEMP. > TEMP. SENSOR > RT]. When the voltage-free contact opens, heating of the central heating (CH) system will switch off.

Three-way valve control (TWV entry)

Switching boiler operation between central heating and heating water in the DHW cylinder coil is done using a three-way dividing valve with an actuator. Connect the device as shown in the diagrams (page 8) and the manual of the valve and servomotor. For DHW cylinder activation, follow the "Service / Configuration - cylinder" instructions. Valves are available from KOSPEL.

Control Panel

The control panel features a display [1], a navigation dial [2], and an operating dial [3]. The display shows time, date, and various operational parameters like temperatures and modes.

Use the operating dial [3] to set one of the modes: winter ☀️ / summer ☀️ / off ❌.

By turning the navigation dial [2] (left or right), with winter or summer mode active, you can change between function screens on the display [1].

• main: Informs about basic boiler parameters (details in table).
• settings: Allows customization of boiler parameters and additional heating circuits to user preferences.
• service / configuration: Allows heating system configuration by installation companies and specialized services (requires access code). Also provides a preview of input/output signals and current parameters.
• PARTY / HOLIDAY / MANUAL: Allows fast changes to the work algorithm based on needs.

Control Elements:

• [1] - display
• [2] - navigation dial to preview dial and settings
• [3] - dial to choose operating mode

Entering individual functions is done by selecting a corresponding function screen and pressing the navigation dial.

Boiler errors are signalled on the main function screen with "Err". Pressing the navigation dial displays a list of detected errors.

Main Screen Information

The main screen displays various indicators:

• [1] - heat reception signalling
• [2] - temperature of return from installation
• [3] - temperature of charging installation
• [4] - preset temperature in the installation or symbol ⚠️ (when heating is blocked by a signal from the master device)
• [5] - DHW cylinder temperature
• [6] - executing of heating program
• [7] - signalling of closed controller contact room (order to heat the room)

Status Indicators:

• Err: Device's error indication.
• ⚠️ (pulsating): Circulation pump operation indication (means minimum flow is not activated).
• ⚙️: Circulation pump venting.
• MA: Heating blocked by signal from master device.
• ?: Heating on indication.
• RT: Request for heating from room regulator (with internal regulator switched off).

Heat reception:

• ? Hot water heating / DHW cylinder
• ❄️ Central heating system heating

Signalling of heating program implementation:

• ? According to the daily/weekly schedule
• ? PARTY - maintaining a comfortable temperature in the DHW cylinder
• ❄️ HOLIDAY - maintaining the temperature in the cylinder to protect against frost
• ?️ Implementation of the frost protection program
• ? DHW cylinder disinfection

Settings

Adjusting boiler parameters to user preferences.

• BOILER TEMPERATURE: Target CH temperature.
• DHW CYLINDER TEMPERATURE: (Only available in systems with a DHW cylinder and with internal adjustment switched on [CONFIGURATION > DHW TEMPERATURE > REGULATION > INSIDE]).
• ECONOMY TEMP. ?, COMFORT ?: Setting the hot water temperature available in schedules.
• DHW CYLINDER TEMPERATURE (only available in DHW cylinder systems with internal adjustment activated [CONFIGURATION > DHW TEMPERATURE > REGULATION > INSIDE]):
  • DHW CYLINDER PROGRAM (max 5 time frames per program):
  • [1] - no. of time frame according to schedule
  • [2] - start time of the selected temperature
  • [3] - finish time of the selected temperature
  • [4] - temperature selection: ? (economy), ? (comfort)
  • Example: Program No.1: 06:00 - 08:00 ?, 18:30 - 23:00 ?
  • Up to 8 daily programs can be set, each with up to 5 editable time frames. The procedure for setting daily programs is described in the "Daily schedule" section. If no time frames are set, the economic temperature is activated.
  • WEEKLY: Assign daily programs for each day of the week.
• CIRCULATION PROGRAM (available only within active circulation in DHW system):
  • CIRCULATION PROGRAM (max 5 time frames per program):
  • [1] - no. of time frame according to schedule
  • [2] - start time of circulation pump operation
  • [3] - finish time of circulation pump operation
  • Example: Program No.1: 06:00 - 08:00, 18:30 - 23:00
  • Up to 8 daily programs can be set, with 5 adjustable time intervals for circulation pump operation. The procedure for setting daily programs is described in the "Daily schedule" section.
  • WEEKLY: Assign daily programs for each day of the week.

Advanced Settings & Functions

• DISINFECTION (only available in systems with DHW):
  • TEMPERATURE: Value of the temperature in the cylinder during disinfection.
  • WEEK DAY: Day for disinfection during automatic program.
  • TIME: Time taken to disinfect with automatic program.
  • WORKING TIME: Time of disinfection (calculated from when the temperature is reached).
  • AUTOMATIC WORK: Automatic start of disinfection at the set time (time, day of the week).
  • CIRCULATION: Option to set disinfection for the entire installation or only DHW.
  • ACTIVATE NOW: Manual start of disinfection (independent of set day or time).
• TIME/DATE:
  • Setting of the current system time (YEAR / MONTH / DAY / HOUR / MINUTE).
  • AUTOMATIC TIME CHANGE: Yes > automatic system time changeover from summer to winter and vice versa.
• INTERFACE:
  • BRIGHTNESS MIN: Setting display brightness in stand-by mode.
  • BRIGHTNESS MAX: Setting display brightness during operation.
  • SOUND: Yes - sound of working dial; No - no sound.
  • DIAL SENSITIVITY: 1 (high) / 4 (low).
• LANGUAGE: Choice of menu language.
• SYSTEM:
  • TYPE: EKCO.Lx3 (identity).
  • MSK PROGRAM: Shows the version of boiler's controllers program.
  • PW PROGRAM: Shows the version of panel's program.
  • MAX RATED POWER: Shows the settled power of the boiler.
  • RESET: Boiler's start-up.
  • FACTORY SETTINGS: Restore.

Service / Configuration

PREVIEW OF PARAMETERS: Preview of boiler's input and output signals.

CONFIGURATION: Adaptation of the boiler to the heating system in the facility.

* Changes in the configuration menu are possible after entering an access code. When prompted for an access code, turn the navigation dial to the required code and confirm by pressing the dial. To exit the code request screen, hold the navigation dial or wait for automatic return to the main function screen.

Code: 987

• CENTRAL HEATING:
  • MAX BOILER TEMP.: Maximum CH temperature.
  • Attention: Adjustment of too high temperature parameters not compatible with the type of building, central heating installation, and building's insulation may lead to high exploitation costs.
  • MAN the temperature of charging: Set point of temperature flow CH.
  • BOILER PROTECTION:
    • Yes - If the temperature inside the boiler drops below 5°C, the circulation pipe will be turned on.
    • No - Protection turned off. Required for central heating installations filled with non-freezing liquid.
• DHW CYLINDER:
  • HW COIL TEMPERATURE: Setting of coil's power.
  • REGULATION: DHW cylinder temperature control.
    • INSIDE: According to Tcyl sensor.
    • OUTSIDE: According to external thermostat (not available when items like DHW CYLINDER TEMPERATURE, DHW CYLINDER PROGRAM, DISINFECTION, and MANUAL mode are present in the menu).
  • CANCEL: Turning off the function of DHW.
  • * If function DHW is turned off, it can only be turned on again.
• CIRCULATION: Switching the circulation "YES" or "NO".
• PUMP:
  • PUMP OVER RUN: Time when the pump is switched on for a short period after a long standstill (blocking protection).
  • AUTOMATIC MODE: Yes - works depending on demand; No - continuous work.
  • TYPE: Pump's type.

Pump Regulation and Settings

• REGULATION:
  • CONST P. - constant pressure.
  • VARIABLE P. - variable pressure.

  In CONST P. mode, the pressure difference produced by the pump is maintained at a constant set level. This is recommended for floor heating or older systems with larger pipes. In VARIABLE P. mode, the pressure difference changes linearly between 1/2H and H, decreasing or increasing depending on the flow. This is recommended for systems with heaters to reduce flow noise in thermostatic valves.

• VENTING: TURN ON / CANCEL. During venting (10 min), the pump alternates between maximal and minimal rotation speed to concentrate air bubbles for easier removal.
• H MAX: Pump's raising height.
• MAX RATED POWER: Setting of the boiler's rated power.
• PRESSURE SENSOR: No - switching off pressure control. This should only be done when the boiler works in an open installation.

Exit any menu item by pressing "END" or by holding the navigation dial. When not operated by the user, the main function screen will appear after approximately 3 minutes.

PARTY / HOLIDAY Mode

Fast switching algorithm of work depending on the needs.

• PARTY: SET DURATION TIME (from 1 to 24 hours or until the user's change).
• HOLIDAY: SET DURATION TIME (from 1 to 60 days or until the user's change).

* If any of these modes is turned on, entering "PARTY / HOLIDAY" allows turning it off.

The symbol of the activated mode is signalled on the main function screen.

Daily Schedule

DHW CYLINDER PROGRAM

The daily schedule interface allows setting time frames and temperatures for DHW cylinder heating.

• [1] - time period panel
• [2] - no. of time frame according to schedule (max 5)
• [3] - start time
• [4] - finish time
• [5] - temperature selection (applies to DHW cylinder)
• [6] - command (active when editing): accept ✔️, delete ❌, add ➕

For the hot water circuit, the daily schedule defines the start time [3] and end time [4] for maintaining the selected temperature [5]. Outside these intervals, the temperature is maintained at the economic level. The start time is also used for the circulation circuit and end of circulation pump operation.

To change parameters, select the program number and press the navigation dial. The first parameter (starting time) flashes; use the navigation dial to set the value (hour and minutes) and confirm by pressing the dial. The next screen allows editing the finishing time. The last editable position is a command. To save changes, select 'save' and press the dial. To delete a time frame, edit it, go to the command position, select 'delete' ❌, and press the dial. To add a new time frame, select the last defined frame, go to the command position, select 'add' ➕, and press the dial.

DHW CYLINDER PROGRAM Example:

Program No.1: 06:00 - 09:15 ?, 15:20 - 22:15 ?

If no time frames are defined, selecting "new" sets a default frame from 00:00 to 23:59, which can then be edited.

The daily program is saved to the boiler's settings by pressing the "END" command.

Technical Data

Electrical Specifications by Boiler Power

Boiler 4 / 6 / 8 kW

Boiler 12 / 16 / 20 / 24 kW