Exodraft EHC20 Manual
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Exodraft EHC20 Manual

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Summary of Contents for Exodraft EHC20

  • Page 1 Control EHC20 | Read and save these instructions! Your energy. Optimized.

  • Page 3: Table Of Contents

    Your energy. Optimized. Control | EHC20 Content Product information Scope of supply Accessories and spare parts Warranty Installation Wall mounting Electrical connection Temperature sensor installation Terminal plan and connections Terminal housing Terminal plan for electrical connection Connection diagram Program 6.1.7. SP, Safe Plate Heat Exchanger with bypass damper, one buffer tank and mixing valve.
  • Page 4 Error messages Replacing a fuse Maintenance Product information Description About the controller Items supplied Controller description Technical data Operation Display and entry system Setup wizard Unassisted setup Menu sequence and structure 1. Measurements 2. Statistics 2.1 Operating hours 2.2 Heat quantity 2.3 Graphic overview 2.4 Reports 2.5 Reset / delete...
  • Page 5 Your energy. Optimized. 6. Special functions 6.1 Program selection 6.2 Rotational speed control 6.3 R2 rotational speed control 6.4 Relay functions 6.5 Heat quantity 6.6 Pressure monitoring 6.7 Sensor calibration 6.8 Setup 6.9 Factory settings 6.10 SD card 6.11 Time and date 6.12 Summer time 6.13 Power saving mode 6.14 Temperature unit...
  • Page 6 How to use this manual This manual has been prepared based on the specific product and contains relevant technical information and installations guides. Accessories and spare parts are not covered by this manual. Please refer to the individual manuals of these components. This installation manual does not contain any system design documentation.
  • Page 7 Symbols The following symbols may be used in the manual to draw attention to danger or risk of personal injury or damage to the product. General prohibition Failure to observe instructions marked with the prohibited symbol may result in extreme danger or serious personal injury. General attention Marks a dangerous situation that, in the worst-case scenario, can cause serious personal injury or significant damage to the product.
  • Page 8 Prior to servicing the product, disconnect the power and ensure that it cannot accidentally be reconnected. • Exodraft always recommends the use of a smoke alarm when a solid fuel open fire is installed. • If the Exodraft fan system has been designed for solid fuel/multi fuel installations, please ensure that the design meets the requirements of BS EN15287-1.

  • Page 9: Product Information

    3112019_EHC20_UK Product information The EHC20 temperature difference controller enables you to efficiently use and check the function of your heat exchanger. Above all, the device gives you confidence through its functionality and simple, almost self-explanatory, operation. The individual entry keys are assigned to each different useful function and explained step-by-step.

  • Page 10: Warranty

    Your energy. Optimized. Warranty All Exodraft products are covered by a 2-year guarantee as per European consumer rights legislation. For some countries an extended period of guarantee may apply depending on either national legislation or other clearly stipulated conditions. Customer complaints must be handled by a specialised dealer or wholesaler (preferably where the Exodraft product has been bought originally).

  • Page 11: Installation

    3112019_EHC20_UK Installation Wall mounting Loosen cover screw completely Carefully remove the terminal cover from the bottom part. Loosen the two screws on the top part and remove the top part from the base. Mark the three mounting holes (see ”Housing base” below). Make sure that the wall surface is as even as possible so that the housing is not warped when attached.

  • Page 12: Electrical Connection

    Your energy. Optimized. Electrical connection Disconnect the power supply before working on the device and make sure that it cannot be reconnected! Check that the power is off! The electrical connection must only be carried out by qualified personnel in compliance with the applicable laws. The automatic controller must not be put into operation if any damage is visible on the housing, such as cracks.

  • Page 13: Temperature Sensor Installation

    3112019_EHC20_UK Temperature sensor installation The automatic controller works with Pt1000 temperature sensors to ensure that the temperature is precisely recorded. The temperature sensor cables must be placed separately from the mains cables to avoid interference in the temperature readings and must not, for example, be placed in the same cables duct! Install the sensor in the area to be measured! Only use the appropriate immersion sensor, surface contact sensor with the appropriate permissible temperature range for the respective area of the application.

  • Page 14: Terminal Plan And Connections

    Your energy. Optimized. Terminal plan and connections Terminal housing The mains side of the terminal housing is protected on the right side by an additional plastic plate. Before removing the plate, check that the power to the automatic controller has been switched off. Bridge Bridge Terminal plan for electrical connection...

  • Page 15: Connection Diagram

    3112019_EHC20_UK Connection diagram Program 6.1.7. SP, Safe Plate Heat Exchanger with bypass damper, one buffer tank and mixing valve. This diagram shows the following system: Heat exchanger SP with built-in bypass damper. A buffer tank, a mixing valve and a circulating pump. Place the S8 temperature sensor in the entry of the heat exchanger.

  • Page 16: Program 6.1.7. Bp - Basic Plate Heat Exchanger With Bypass Damper

    Your energy. Optimized. Program 6.1.7. BP - Basic Plate Heat exchanger with bypass damper. With one storage tank and a mixing valve. The S8 temperature sensor must be installed in the main chimney before the entry of the bypass damper. The S3 temperature sensor must be mounted on the forward flow pipe between the heat exchanger and the mixing valve.
  • Page 17 3112019_EHC20_UK This diagram shows wiring diagram for program version 6.1.7 both covering SP, Safe Plate and BP, Basic Plate installations: exodraft EHC10/EHC20 controller t° STB Safety limiter Smoke gas temperature Forward flow Storage tank temperature temperature Bypass Mixer Pump UK | 17...

  • Page 18: By High Temperature In The Heat Exchanger In Bypass Mode The Following Solution Will Keep The Circulation Pump Running Until The S3 Flow Sensor Is Below The Chosen Setpoint

    The temperature in the heat-exchanger can become too high when the heat source stops and the temperature S8 drops below the set-point. A solution for this is described below. Connect the pump according to this diagram exodraft EHC10/EHC20 Regler Mischer Pumpe...

  • Page 19: Installation Note For 3-Way Mixing Valve

    3112019_EHC20_UK Installation note for 3-way mixing valve Please pay attention to the installation note during use of the Exodraft SM230 with MV20 three-way mixing valve. When using a different three-way mixing valve, please pay attention to the flow direction during installation!

  • Page 20: Service And Start-Up

    Your energy. Optimized. Service and start-up Display and entry The display (1), which has extensive text and graphics modes, makes servicing the automatic controller both simple and almost self-explanatory. Please press the ESC key to return to the main menu. The green LED status light (2) illuminates when a relay is switched on, the red LED light blinks in the event of an error message or when saving information.

  • Page 21: Initial Start-Up With The Start-Up Assistant

    3112019_EHC20_UK Initial start-up with the start-up assistant The start-up assistant will appear when you switch on the device for the first time and will guide you through the following menu: Choose language –> press OK to confirm Time and date –> adjust with the arrow keys and press OK to confirm each selection.

  • Page 22: Lock Menu

    Your energy. Optimized. Lock menu The lock menu is used to prevent any unintentional changes to the entered values. The following menu items remain fully accessible when the lock menu has been activated and can be adapted as needed: 1. Measured values, 2. Evaluation, 6.23. Time & date, 8. Lock menu, 9. Service values Activate/deactivate the lock menu To activate/deactivate the lock menu, press ESC to return to the main menu and use the arrow keys to select menu point ”7.

  • Page 23: Option For Heat Quantity Counter Se 20/Se 25/Se 32

    When installing the heat quantity counter (WPS), it is vital to pay attention to the flow direction, because otherwise correct functioning cannot be ensured. Connect the EHC20 by inserting the plug in the VFS1 connection socket. Connector for energy sensor...

  • Page 24: Start-Up And Set-Up

    Your energy. Optimized. Start-up and set-up To setup the Controller using the VFS follow the steps below. Go to main menu -> Select menu number 6 “Special Functions” Go to menu number 9 “ Heat quantity” Move cursor to select “VFS1”. Press “Info” Select the type of VFS.

  • Page 25: Sd Card

    3112019_EHC20_UK SD card You can store the current configuration, measurement results, etc. on the included SD card or overwrite a software update on the automatic controller. To do this, press ESC to go to the main menu and select ”6. Special functions” and then select menu item ”14.

  • Page 26: Error Messages

    Your energy. Optimized. Error messages If the automatic controller recognises a malfunction, the warning symbol will appear in the display. When the error is corrected, then the warning symbol changes to an information symbol. (LED flashes + warning Further information about the error may be obtained by pressing the symbol) key under the warning or information symbol.

  • Page 27: Maintenance

    3112019_EHC20_UK Fuses T2 A / 250 V Circuit board Electronic relays Mechanical relays Maintenance In the course of the annual general servicing of your heater, you should also have the qualified person check the functions of the automatic controller and, if necessary, optimise its settings. Carrying out maintenance •...

  • Page 28: Product Information

    The EHC20 can be used as a temperature differential controller for various types of systems. These are illustrated and explained from page 32 onwards.

  • Page 29: Items Supplied

    • 12 strain relief clamps with 24 screws, replacement fuses 1x T2 A / 250 V • Micro SD card • EHC20 mounting and operating manual Optionally supplied depending on model/order: • Pt1000 temperature sensors and thermowells Also available: •...

  • Page 30: Controller Description

    Your energy. Optimized. Controller description Technical data Electrical data: Mains voltage 100 - 240 VAC Mains frequency 50 - 60 Hz Power consumption 0.5 - 3 W Switching power Total electronic relay switching power: 460 VA for AC1 / 240 W for AC3 Electronic relay R1 Min.
  • Page 31 3112019_EHC20_UK Permitted total cable lengths: Sensors S7 and S8 <30 m Other Pt1000 sensors <10 m VFS/RPS sensors <3 m <3 m PWM/ 0...10 V <3 m Electronic relay <3 m Mechanical relay <10 m Storage medium Micro SD card slot Real time clock RTC with 24-hour power backup Permitted ambient conditions:...

  • Page 32: Operation

    Your energy. Optimized. Operation Display and entry system The display (1) with an extensive text and graphics mode makes the controller virtually self-explanatory in use. To access the settings from the overview, press the "esc" button. The green status LED (2) lights up as soon as a relay is connected; the red LED flashes in the event of an error message.

  • Page 33: Setup Wizard

    Exodraft recommends that you save the configuration on the SD card after the setup. To save the configuration, you will need to use the “Save config.” function. This can be found in Menu 6.14 (Special functions/SD card).

  • Page 34: Menu Sequence And Structure

    Your energy. Optimized. Menu sequence and structure The graphics or overview mode appears when no button has been pressed for two minutes or if the main menu is exited by pressing ”esc”. Within this overview, you can scroll through the sensors and relays using the up and down buttons.

  • Page 35: Measurements

    3112019_EHC20_UK 1. Measurements The menu “1. Measurements” is displaying the currently measured temperature values. The menu can be exited by pressing ”esc” or selecting ”Exit measurements”. If ”--” appears in the display instead of the measurement, this indicates a defective or incorrect temperature sensor.

  • Page 36: Statistics

    Your energy. Optimized. 2. Statistics The ”2. Statistics” menu is used for function control and long-term monitoring of the system. The menu can be exited by pressing ”esc” or selecting ”Exit statistics”. In order to evaluate system data, the controller clock must be set correctly. Improper operation or an incorrect time may result in data being deleted, recorded incorrectly or overwritten.

  • Page 37: Operating Mode

    3112019_EHC20_UK 3. Operating mode In the ”3. Operating mode” menu, you can not only select the automatic mode but also switch off the controller or switch to a manual operating mode. You can exit the menu by pressing ”esc” or selecting ”Exit Operating mode”.

  • Page 38: Settings

    Your energy. Optimized. 4. Settings In the ”4. Settings” menu, you can configure the basic settings for the control functions. Under no circumstances are these settings designed as a substitute for the customer’s own safety provisions! You can exit the menu by pressing ”esc” or selecting ”Exit settings”. The menu numbering varies depending on the hydraulic schema chosen (see “6.1 Program selection”, page 41) 4.1 Tmin S (X) Enable/switch-on temperature at sensor X...

  • Page 39: Filling Time

    3112019_EHC20_UK 4.5 Filling time Interrupting the filling of a lower-ranking storage tank When using a program with more than one storage tank it’s possible to prioritize between the storage tanks. When the Tsetpoint for the higher ranking tank is reached, the controller will switch to fill the lower ranking tank.

  • Page 40: Protective Functions

    Your energy. Optimized. 5. Protective functions In the ”5. Protective functions” menu, you can enable and configure various protective functions. Under no circumstances are these settings designed as a substitute for the customer’s own safety provisions! You can exit the menu by pressing ”esc” or selecting ”Exit protec- tive functions”.

  • Page 41: Special Functions

    6.2 Rotational speed control If rotational speed control is enabled, a special internal electronic system in the EHC20 allows you to alter the rotational speed of pumps according to process requirements.
  • Page 42 Your energy. Optimized. Mode 3: The controller switches to the set min. rotational speed after the purging period. If the temperature at the reference sensor (collector; in systems with heat exchanger for relay 2 the heat exchanger) is above the setpoint value to be set subsequently, the rotational speed will be increased. If the temperature at the reference sensor is below the setpoint value to be set subsequently, the rotational speed will be reduced.
  • Page 43 3112019_EHC20_UK 6.2.3.6 0-10V off This voltage is output when the pump is switched off (pumps with cable breakage detection require a minimum voltage). Setting range: (Solar:) 0.0 to 5.0 V / default: 1.0 V - (Heating:) 5.0 to 0.0 V / default: 4.0 V 6.2.3.7 0-10V on The pump needs this voltage in order to switch on.
  • Page 44 Your energy. Optimized. 6.2.3b Technical data – PWM and 0-10 V PWM technical data: PWM: 20% to 100%, 1 kHz Designed for a 10 k ohm load resistance 0-10 V technical data: 10 V = 100% rotational speed 0-10 V: 2 V to 10 V (20% to 100%) 5 V = 50% rotational speed Designed for a 10 k ohm load resistance.

  • Page 45: R2 Rotational Speed Control

    3112019_EHC20_UK 6.2.8 Setpoint value This value is the control setpoint value for Mode 3 (see ”6.2.1 Rotational speed modes”, page 41). If this value at the sensor drops below, the rotational speed will be reduced. If it is exceeded, the rotational speed will be increased.
  • Page 46 Your energy. Optimized. 6.4.1.3 Thermostat sensor 1 Tsetpoint is measured at thermostat sensor 1 If thermostat sensor 2 is connected, the relay will switch on when the temperature drops below ”TH set- point” at thermostat sensor 1, and off when ”TH setpoint” + hysteresis at thermostat sensor 2 is exceeded. Setting range: S1-S8, VFS1-2, Active storage tank / default: none 6.4.1.4 Thermostat sensor 2 Optional switch-off sensor...
  • Page 47 3112019_EHC20_UK 6.4.3 Cooling When using the controller for heat recovey control the cooling function should not be used. Setting range: On, Off 6.4.3.1 Co Tsetpoint The target temperature at thermostat sensor 1. Above this temperature, cooling will be switched on until Co Tsetpoint + hysteresis is reached.
  • Page 48 Your energy. Optimized. 6.4.4.2 ∆T return flow Switch-on temperature difference If the temperature difference between the storage tank sensor and the return flow sensor is exceeded, the relay will be switched on. Setting range: 5-20 K / default: 8 K Switch-off temperature difference: If the temperature difference between the storage tank sensor and the return flow sensor is exceeded, the relay will be switched off.
  • Page 49 3112019_EHC20_UK 6.4.5.5 AL sensor 2 Optional AL sensor If this sensor is connected, Tsetpoint AL must be reached at both sensors for the action time in order to allow successful heating. Setting range: S1-S8, VFS1-2, Active storage tank / default: none 6.4.5.6 AL times AL heating will take place at these times.
  • Page 50 Your energy. Optimized. 6.4.6.4 Source sensor In this menu, you can set the sensor that is positioned in the storage tank from which energy is withdrawn. Setting range: S1-S8, VFS1-2, Active storage tank / default: none 6.4.6.5 Destination sensor In this menu, you can set the sensor that is positioned in the storage tank to which energy is transferred. Setting range: S1-S8, VFS1-2, Active storage tank / default: none 6.4.7 Difference When using the controller for heat recovey control the difference function should not be used.
  • Page 51 3112019_EHC20_UK 6.4.8 Solid fuel boiler When using the controller for heat recovey control the solid fuel boiler function should not be used. Setting range: On, Off 6.4.8.1 SF Tmin Minimum temperature in the boiler for switching on the pump. If the temperature at the boiler sensor is below this temperature, the relay will not be switched on.
  • Page 52 Your energy. Optimized. 6.4.10 Pressure control The relay switches on if the pressure drops below a minimum or exceeds a maximum. Setting range: On, Off / default: Off 6.4.10.1 Pressure control In this menu, you can enable system pressure control via a direct sensor. As soon as the set pressure conditions are exceeded, the set relay will switch on.
  • Page 53 3112019_EHC20_UK 6.4.12 Parallel operation R (X) The relay operates at the same time as the set relay R1 or R2. Setting range: On, Off 6.4.12.1 Delay In this menu, you can specify how long after starting R1 or R2 the system waits until the relay operating in parallel starts.

  • Page 54: Heat Quantity

    Your energy. Optimized. 6.4.15.3 Room sensor Allows you to select the reference sensor for the room temperature. Setting range: S1-S8, VFS1-2, Active storage tank / default: none 6.4.15.4 Times Daytime operating times for the heating circuit function You can set the desired time periods during which the heating circuit operates in daytime mode here. You can enter three times for each day of the week.

  • Page 55: Pressure Monitoring

    3112019_EHC20_UK 6.5.4 Proportion of glycol The proportion of antifreeze added to the medium in percent. Setting range: 0-100% / default: 45% 6.5.5 Forward throughflow (X) Nominal system throughflow The system throughflow in litres per minute which is used as a basis for calculating the metered heat quantity.

  • Page 56: Sensor Calibration

    Your energy. Optimized. 6.6.1 Pressure monitoring If the pressure drops below a minimum or exceeds a maximum, a message will be displayed and the LED will flash red. Setting range: On, Off / default: Off 6.6.1.1 RPS1 / RPS2 Pressure sensor model In this menu, you can set the type of pressure sensor used.

  • Page 57: Factory Settings

    3112019_EHC20_UK 6.9 Factory settings All settings can be reset to the original factory settings. All controller parameters and statistics etc. will be irretrievably lost. The controller will then need to be set up again. 6.10 SD card Settings for the logging function with data storage on the SD card. 6.10.1 Logging In this menu, you can enable the logging of sensor and relay data and adjust the settings.

  • Page 58: Summer Time

    Your energy. Optimized. 6.12 Summer time If this function is enabled, the controller will automatically switch to winter time or summer time (DST – daylight saving time). 6.13 Power saving mode In power saving mode, the background lighting for the display will be switched off if no button is pressed for two minutes.

  • Page 59: Service Data

    3112019_EHC20_UK 8. Service data The ”8. - Service data” menu can be used by a specialist or the manufacturer for remote-diagnostics etc. in the event of an error. You can exit the menu at any time by pressing ”esc”. The Service data are saved on the SD card during logging. 9.

  • Page 60: Faults With Error Messages

    Your energy. Optimized. Faults with error messages If the controller identifies a malfunction, the warning symbol will appear in the display. If the error is no longer present, the warning symbol will change to an information symbol. (Led flashes + warning symbol) Pressing the button below the warning or information symbol will bring up more detailed information regarding the error.

  • Page 61: Maintenance

    3112019_EHC20_UK Fuses T2 A / 250 V Circuit board Electronic relays Mechanical relays Maintenance As part of the general annual maintenance for your heating system, you should have the controller fun- ctions checked by a specialist and have your settings optimised if necessary. Maintenance procedures: •...

  • Page 62: Useful Information / Tips And Tricks

    Your energy. Optimized. Useful information / tips and tricks Temperature resistance table for Pt1000 sensors °C Ω 1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385 Instead of setting the system throughflow with a volume flow limiter, it is better to adjust the throughflow using the selector switch on the pump and the controller’s ”Max.

  • Page 63: Conformity Assessed

    UK Conformity Assessed UK Conformity Assessed Exodraft a/s Industrivej 10 DK-5550 Langeskov Hereby declares that the following products: EHC20 Were manufactured in conformity with the provisions of the following regulations: The Supply of Machinery (Safety) Regulations 2008 Electrical Equipment (Safety) Regulations 2016...

  • Page 64: Declaration Of Conformity

    EU-Vaatimustenmukaisuusvakuutus Déclaration de conformité de l’Union Européenne ESS-Samræmisstaðfesting EU-Samsvarserklæring Dichiarazione di Conformità Unione Europea EU Deklaracja zgodności Exodraft a/s Industrivej 10 DK-5550 Langeskov Erklærer på eget ansvar, at følgende produkter: Veklaart dat onderstaande producten: Hereby declares that the following products: Deklarerar på...
  • Page 65 3112019_EHC20_UK UK | 65...
  • Page 66 Your energy. Optimized. 66 | UK...
  • Page 67 3112019_EHC20_UK UK | 67...
  • Page 68 DK: Exodraft a/s Industrivej 10 DK-5550 Langeskov Tel: +45 7010 2234 Fax: +45 7010 2235 info@exodraft.dk www.exodraft.dk SE: Exodraft a/s Kalendevägen 2 SE-302 39 Halmstad Tel: +46 (0)8-5000 1520 info@exodraft.se www.exodraft.se NO: Exodraft a/s Storgaten 88 NO-3060 Svelvik Tel: +47 3329 7062 info@exodraft.no...

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