HEAT RECOVERY UNIT MINIMASTER RDKS INSTALLATION, OPERATION, MAINTENANCE AND SPARE PARTS

HEAT RECOVERY UNIT MINIMASTER RDKS INSTALLATION, OPERATION, MAINTENANCE AND SPARE PARTS

2 Heat recovery unit RDKS - Technical manual CONTENTS OPERATION AND MAINTENANCE (FOR USER) Functions, system design, electrical data, energy class...3 ISYteq Basic control panel Operation... 4 Overview of symbols and functions...5 ISYteq Touch 3.5 control panel... General information...6 Cleaning of the display...6 General buttons and symbols...6 Home screen... 7 Operation...8 Maintenance and cleaning of heat exchanger and fans...10 Filter alarm and filter replacement...11 Overheating protection, impeller alarm, temperature alarm, other alarms... 12 INSTALLATION (FOR INSTALLER AND SERVICE PERSONNEL) Dimensions, installation measurements 13 Wiring and connection diagram... 14 Duct connection, duct insulation...15 Installation options and duct definitions...16 Installation of unit with accessories...17 ADJUSTMENT, COMMISSIONING (FOR INSTALLER AND SERVICE PERSONNEL) Settings, date/time, language... 22 Login, settings... 23 Adjustment...24 Control panel operation, commissioning... 25 Parameter list... 28 MISCELLANEOUS Spare parts... 33 EC Declaration of Conformity...34 Disposal of products and packaging materials... 35 Declaration of Conformity... 36 WARNING! THE APPLIANCE MAY BE USED BY CHILDREN OVER THE AGE OF 8, PERSONS (INCLUDING CHILDREN) WITH PHYSICAL, SENSORY OR MENTAL DISABILITIES OR LACK OF KNOWLEDGE OR EXPERIENCE, PROVIDED THEY HAVE RECEIVED INSTRUCTION OR INFORMATION ON SAFE USE OF THE APPLIANCE AND UNDERSTAND THE POTENTIAL RISKS. CHILDREN MAY NOT PLAY WITH THE APPLIANCE. CHILDREN MAY NOT CLEAN OR PERFORM MAINTENANCE ON THE APPLIANCE WITHOUT SUPERVISION. NOTE! INSTALLATION, ADJUSTMENT AND COMMISSIONING AS DESCRIBED IN THESE INSTRUCTIONS MUST BE CARRIED OUT BY AN INSTALLER OR SERVICE PERSONNEL.

Heat recovery unit RDKS - Technical manual 3 OPERATION AND MAINTENANCE FUNCTIONS, SYSTEM DESIGN, ELECTRICAL DATA, ENERGY CLASS FANS The fans are powered by energy-efficient EC motors. They are easy to remove for service and maintenance. The speed of the fans can be adjusted independently of each other. HEAT RECOVERY AND SUPPLEMENTARY HEATING In climates where the temperature seldom drops below -10 C, there is usually no need for supplementary heating. This is because the rotary heat exchanger recovers enough thermal energy from the extract air ( 85% h temp ). When the outdoor temperature is below -10 C and the desired supply air temperature cannot be achieved, a postheater is required, which is controlled to maintain the set supply air temperature. In very cold areas, the unit can also be supplemented with a heater that preheats the outdoor air. This heater starts preheating the air when the outdoor temperature falls below -12 C. The electric heaters have an integrated overheating protection function. CO 2 CONTROL (OPTIONAL) This function regulates towards a preset setpoint. The fan speed is automatically adjusted to achieve the desired CO 2 level. NOTE! CO 2 control requires a ISYteq Touch 3.5 control panel. This function can also be ordered retrospectively to supplement the unit. ETHERNET CONNECTION (OPTIONAL) This function can be used to connect the unit to an existing network. In that case, the unit is equipped with an integrated web server, which makes it possible to read and change certain parameters via a web browser. The connection can also be used for connection to a superior system via Modbus TCP/IP. THE UNIT S MAIN COMPONENTS 11 13 12 7 3 2 NOTE! THE ELECTRIC POSTHEATER IS ONLY ACTIVATED IF THE IMPELLER IS IN OPERATION. FILTER As standard the unit is fitted with a class M5 bag filter. For filter replacement, see page 11. 5 9 8 DEFROSTING During cold periods, when frost may form in the impeller, the integrated control unit automatically activates a defrosting function. The unit defrosts for 15 minutes every 6 hours if the outdoor temperature is below -10 C. The supply air fan stops and the impeller moves forward in sections. COOLING RECOVERY In the summer, if the extract air is cooler than the outdoor air, the rotary heat exchanger starts to recover cooling from the cooler extract air. This primarily applies if there is some type of cooling appliance in the house. ALARMS The ISYteq Basic control panel (accessory) has a limited alarm indicator function. The panel indicates, for instance, when there is a temperature alarm or when the filter needs replacing. If the ISYteq Touch 3.5 control panel (accessory) is used, the alarm will be presented in plain text (see separate instructions). 1. Outdoor air sensor 2. Extract air sensor 3. Supply air sensor 4. Preheater 5. Extract air fan ELECTRICAL DATA 6, 10 4 1 6. Heat exchanger 7. Supply air filter 8. Control unit 9. Casing Voltage: 230V, single phase, 50 Hz 10. Heat exchanger motor 11. Extract air filter 12. Postheater 13. Supply air fan Code Fan motors Preheater Postheater Rated output Rated output Rated output, W Electr., W Electr., W Electr., W 1) with cooker hood RDKS 2 x 83 500 500 1170 1210 1) Rated output applies when both the preheating and the postheating devices are installed. ENERGY CLASS MOISTURE CONTROL (OPTIONAL) This function automatically limits the rotary heat exchanger s moisture recovery at high indoor humidity levels. This function can also be ordered retrospectively to supplement the unit. Compliant with energy class A+ in cold climate conditions (Scandinavia). If configured for on-demand control, the unit is compliant with energy class A in average climate conditions (Central Europe). Ecodesign Directive 1254/2014.

14:35 14:35 4 Heat recovery unit RDKS - Technical manual ISYTEQ BASIC CONTROL PANEL - OPERATION The unit has a built-in control unit that controls the operation of the fans, the rotary heat exchanger and any electric heaters. The unit is controlled via an external ISYteq Basic or ISYteq Touch 3.5 control panel (accessory), see page 6. The control unit should be installed in a suitable place. After being adjusted, the unit can also be operated without a control panel, but only in one operating mode. UNIT WITH COOKER HOOD When the boost damper in the cooker hood is opened, the fan speed increases. Forced mode continues while the boost damper remains open. After that, the fans resume normal speed. BOOST 21 21 TRICKLE/NORMAL Figure 1. ISYteq Basic and ISYteq Touch 3.5 control panel. The user can select between the following operating modes: AWAY HOME FORCED is used when there is reduced need for ventilation, e.g. when occupants are on holiday used for normal ventilation flow is used when there is a greater need for ventilation (automatically reverts to normal after 120 minutes) Use the arrow button to switch operating modes (see figure 2). A LED shows the current operating mode. Forced via CPDJ cooker hood. 15 3060 Boost damper (one press per time setting) x1 = 15 min x2 = 30 min x3 = 60 min Forced via CPTJ cooker hood. AWAY HOME Arrow button (for selecting operating mode) Operating modes ISYteq Basic FORCED

Heat recovery unit RDKS - Technical manual 5 ISYTEQ BASIC CONTROL PANEL - OVERVIEW OF SYMBOLS AND FUNCTIONS SYMBOLS DURING NORMAL OPERATION AWAY HOME FORCED Symbol Description AWAY mode HOME mode FORCED mode for 120 minutes + Defrosting mode. The unit resumes normal operation after 15 minutes Switch operating modes between: AWAY, HOME and FORCED. Disabled during defrosting Min. 10 sec. Press * for a minimum of 10 seconds to reset an alarm. Also see pages 11 and 12. Continuously flashing alarm symbol indicates filter alarm. See page 11. Three flashes at intervals indicates rotor alarm. See page 12. Steady illumination indicates temperature alarm. See page 12. No symbols illuminated indicates that unit has stopped. See Other alarms on page 12. Figure 5. Symbol description ISYteq Basic.

6 Heat recovery unit RDKS - Technical manual ISYTEQ TOUCH 3.5 CONTROL PANEL GENERAL The control panel has a touch screen display. Use your finger or the back of a pen to navigate in the menus. When the power is switched on, all the menus will be imported into the system. This will take about 20-30 seconds. After this, the home screen will be displayed. CLEANING OF THE DISPLAY Disconnect the unit from the power supply by disconnecting the power cord. Carefully wipe the display with a soft, dry, non-abrasive cloth. If any marks remain, moisten the cloth slightly with a detergent specially designed for LCD or mobile screens and wipe the screen gently from top to bottom. Never use other detergents, as they may contain ammonia or other additives that could damage the display. IMPORTANT: Never spray or pour liquids directly onto the display. Never clean the control panel when the system is switched on. GENERAL BUTTONS AND SYMBOLS The following buttons and symbols are universal and available on many menu pages. 14 Home button, to return to the home screen. Back button, to cancel and return to the previous page. Confirm button, to confirm and proceed. Changing a value. Option 1: Press the arrow keys to increase or decrease the value. Option 2: Press the displayed number to enter the chosen value (see below). Use the number keys to enter a value. Confirm with or cancel with. Read-only values (without a surrounding window), cannot be changed. Editable values (surrounded by a window), can be changed. Some submenus have more than one page. Click the upper or lower part of the scroll list to navigate between pages. NOTE! The cursor cannot be moved vertically.

Heat recovery unit RDKS - Technical manual 7 ISYTEQ TOUCH 3.5 CONTROL PANEL - HOME SCREEN STATUS LINE Heat recovery active Postheater active Preheater active Defrosting in progress CURRENT SETPOINT, SUPPLY AIR TEMPERATURE CLOCK ALARMS No alarm Alarm B Alarm A OPERATING STATUS Manual mode Heating stove mode CO2 control Forced via cooker hood OPERATING MODES Away mode The user can select between the following operating modes: AWAY HOME FORCED used when there is reduced need for ventilation, e.g. when occupants are on holiday used for normal ventilation flow used when there is a greater need for ventilation (automatically reverts to normal after 120 minutes) Home mode Forced mode

8 Heat recovery unit RDKS - Technical manual ISYTEQ TOUCH 3.5 CONTROL PANEL - OPERATION SHORTCUT TO SETTING OF TEMPERATURE SETPOINT See page 9 for more information on temperatures. SHORTCUT TO SETTING OF DATE AND TIME ALARMS See page 9. SELECT OPERATING STATUS See page 9. MENU See page 9. AWAY MODE HOME MODE FORCED MODE Press the relevant field to select operating mode. The operating mode cannot be changed during defrosting, or during forced operation with a cooker hood.

Heat recovery unit RDKS - Technical manual 9 ISYTEQ TOUCH CONTROL 3.5 PANEL - OPERATION SELECTING OPERATING STATUS The symbol on the home screen shows the operating status. Press the centre of the fan symbol to change the status. MENU Normal mode (manual) Heating stove mode, makes it easier to light a heating stove or open fireplace. Temporarily creates overpressure in the house. ALARMS The symbol on the home screen shows the alarm status. No alarm Alarm B Alarm A Press the icon to enter the alarm screen. TEMPERATURES Here you set the desired supply air temperature (setpoint). Note: This value is not to be confused with the desired indoor temperature, which is managed by the domestic heating system. The recommended setpoint is 16 19 C. The factory setting is 18 C. Temperatures, output signals etc. are read-only values. FAN STATUS Supply and extract air fan speeds can be read from 30 100 % or as 0 (off). AIR QUALITY Air quality (only available if optional moisture control or CO 2 control is activated). Relative humidity of the supply and extract air can be read from 0-100% RH. The setpoint and current CO 2 value (up to 2,000 ppm) can be read. Example 1 No alarm CLEARING ALARMS Example 2. Active alarms To clear an individual alarm, press Acknowledge after the relevant alarm. To clear all the alarms, press Acknowledge All button (top right). If the alarm cannot be cleared, it will reappear on the display and the underlying cause for this must be resolved before the alarm can be cleared. A built-in timer is normally set to provide a filter replacement reminder (alarm) every six months. If a shorter replacement interval is required (before the alarm is due) the filter alarm can be reset under the Settings menu. See page 22, fig. 3. SYSTEM OVERVIEW Version control panel -- -- -- -- -- -- -- -- -- -- -- --IP Octet 1 Bootloader control panel --------------------IP Octet 2 Version control card ------------------------IP Octet 3 Bootloader control card -- -- -- -- -- -- -- -- -- -- --IP Octet 4 Unit type TIME SCHEDULES (Not applicable to domestic ventilation). SETTINGS See pages 22 23. ALARM HISTORY

Param. LED Mode Param. LED Mode 10 Heat recovery unit RDKS - Technical manual MAINTENANCE AND CLEANING OF HEAT EXCHANGER AND FANS GENERAL The fans, filters and heat exchanger are very important for the operation and economy of the unit. For this reason, it is crucial for them to be kept clean and in good condition. We recommend a general check-up every 6 months. For safety reasons, general caution should be observed during maintenance of the unit. Be careful to avoid trapping any cables. If necessary, use protective gloves. The drive belt and seals may need replacing due to wear and tear. Check them for damage and replace if necessary. For designations, see spare parts list on page 33. Vacuum clean the heat exchanger or blow clean with compressed air. Before cleaning the heat exchanger, fans etc., the unit should always have the power disconnected. CLEANING OF FANS Note that the fans must not be cleaned with water or other fluids; they may only be vacuum cleaned or brushed. Remove the unit s front cover (if there is one). Remove the screws on the door and open the door. The picture shows a unit with right-hand configuration (RDKS-1). CLEANING OF THE HEAT EXCHANGER Check that the surface of the rotor is not coated with dust. Clean with a vacuum cleaner or by blowing through with compressed air. If vacuum cleaning is not sufficient, hand-spray with grease dissolving fluid and then blow clean with compressed air. Use the compressed air to blow away from the clean side towards the dusty side. Note! Water, acetone or similar solvents must not be used. Remove the fan from the unit. Disconnect the electrical connection. Disconnect the impeller from the fan housing by unscrewing the screws on the side of the fan housing. Remove the heat exchanger package from the unit. Disconnect the electrical connection to the impeller motor. Clean the impeller housing and the fan blades with a brush or a vacuum cleaner. NOTE! Take care not to damage any impeller housing balancers, and ensure that no cables are trapped during reassembly.

Param. LED Mode Heat recovery unit RDKS - Technical manual 11 FILTER ALARM AND FILTER REPLACEMENT The supply air and exhaust air filters should normally be replaced every six months. In dirty areas, the filters may need to be replaced more frequently. A built-in timer is normally set to provide a filter replacement reminder every six months. TO REPLACE THE FILTER, FOLLOW THE STEPS BELOW. When replacing dirty filters, use of a face mask is recommended (lowest class, FFP2). 1. Disconnect the unit from the power supply by pulling out the plug. FILTER ALARM ISYTEQ BASIC When the filter needs replacing, a continuously flashing alarm light is shown on the ISYteq Basic control panel. A continuously flashing alarm symbol indicates filter alarm. 2. Open the door of the unit by unscrewing the two screws on the front (see below). After replacing the filter, reset the filter timer by pressing the * button on the control panel for a minimum of 10 seconds. FILTER ALARM ISYTEQ TOUCH 3.5 Press the Information/alarm button if the alarm is indicated. 3. Pull out the supply air and exhaust air filters. Dispose of used filters according to local waste regulations. 4. Insert new filters. B A The reason for the alarm is shown under active alarms. The picture shows a bag filter. A flat filter may also be used. After replacing the filter, acknowledge the alarm. 5. Close the door of the unit. 6. Connect the plug. 7. After replacing the filter, reset the filter alarm. If a filter is replaced before the alarm is due, the filter replacement timer cannot be reset via the ISYteq Basic control panel (accessory). If there is no ISYteq Touch 3.5 control panel (accessory) on the unit when the filter is replaced, the timer must be reset when the alarm is due, i.e. when the set time is reached. For resetting, see page 22.

12 Heat recovery unit RDKS - Technical manual OVERHEATING PROTECTION, ROTOR ALARM, TEMPERATURE ALARM, OTHER ALARMS THERMAL OVERLOAD PROTECTION The fan motors are equipped with thermal overload protection devices, which are reset manually by briefly disconnecting the power. The electric heaters have two thermal overload protection devices, one automatic and one manual. The automatic overheating protection trips before the manual one, which means it does not normally need to be reset. If the manual overheating protection for the electric heater has tripped during operation, first the power to the unit should be switched off and then the overheating protection should be reset by pressing the reset button. In order to access the button, the electric heater must be disconnected. If the manual overheating protection trips again, call qualified service personnel. ROTOR ALARM If the rotor motor stops and the Tacho signal disappears, five attempts will automatically be made to restart the rotor (start/stop). If this does not solve the problem, the unit will stop and the rotor alarm will be indicated. TEMPERATURE ALARM Generates an alarm and stops operation if the supply air temperature drops below +5 C. The alarm is disabled during defrosting or during forced operation with a cooker hood. A 10-minute delay ensures that the supply air temperature has time to rise if operation has been stopped. OTHER ALARMS The unit has various alarms that are not supported by the simple ISYteq Basic control panel (accessory). If any of these alarms are triggered, the unit will stop running and all the LEDs on the ISYteq Basic will be extinguished. This also happens in the event of power failure. A LED on the control card indicates that the power is not switched off. To reset these alarms, the unit must be restarted by pulling out and reconnecting the plug. If the ISYteq Touch 3.5 control panel (accessory) is used, the alarm will be presented in plain text. If the alarm recurs, service personnel will be called for assistance. SENSOR ERROR If any of the temperature sensors starts malfunctioning, the unit will stop running. To reset, follow the instructions under Other alarms. EXTERNAL ALARM An external alarm can be connected to the unit. If this alarm is triggered, the unit will stop running To reset, follow the instructions under Other alarms.

Heat recovery unit RDKS - Technical manual 13 INSTALLATION - DIMENSIONS, INSTALLATION MEASUREMENTS RDKS-2 LEFT RDKS-1 RIGHT Outdoor air and supply air to the left. Left-hinged door. Outdoor air and supply air to the right. Right-hinged door. 380 380 32 32 600 600 595 595 203 240 70 115 240 203 115 70 188 83 U T F A 78 183 265 285 78 183 A F T U 83 188 265 285 595 95 595 95 Weight: 40 kg INSTALLATION MEASUREMENTS RDKS-2 Left Connection (female) T F U A Diameter 125 100 100 125 Supply air Extract air 1) Outdoor air 1) Exhaust air 1) To be increased to Ø125 as soon as space allows. RDKS-1 Right Kitchen cabinet Kitchen cabinet RDKS Kitchen cabinet Max 385 Kitchen cabinet Kitchen cabinet RDKS Kitchen cabinet Max 385 Min 95 Adapter section Adapter Adapter Min 95 Min 95 Adapter Min 95 section section section RDKS Kitchen cabinet Kitchen cabinet RDKS Kitchen cabinet RDKS RDKS Kitchen cabinet

14 Heat recovery unit RDKS - Technical manual WIRING AND CONNECTION DIAGRAM WIRING AND CONNECTION DIAGRAM, CONTROL CARD L N PE Door switch board 230 V Post-heater N L Pre-heater N Impeller L N L Tacho Sum alarm C NO Max 24V, 200 ma NOTE! DO NOT connect the Curo Basic RKDZ-41-1 control panel to this connection as it risks being damaged by excessive current.. 1 N 2 L 3 N 4 L 5 N 6 L 7 N 8 L 11 N 12 L 13 14 15 16 Timer 1 DI M DI M Timer 2 Curo TM Touch RS485 Supply air fan B A GND N L 0 V +10 V 70 69 68 67 66 65 64 A USB Ethernet board (accessory) 51 50 49 48 47 46 B 27 28 32 33 34 35 36 37 38 External alarm (Volt free contact) Output 0-10V GND CO 2 sensor +24 V A B Extract air fan N L 0 V +10 V Curo Basic Temp. extract Temp. outdoor Temp. supply Moisture sensor supply air Moisture sensor extract air Cooker hood N L

Heat recovery unit RDKS - Technical manual 15 DUCT CONNECTION, DUCT INSULATION Note! During installation, the instructions regarding unit installation and duct insulation must be adhered to without deviation. Otherwise, there is a risk of condensation and moisture resulting in major damage. DUCT CONNECTION Exhaust air from the unit may only be connected to a ventilation duct intended for this purpose. Connection must not be made to a smoke or gas flue. In case of extract air ventilation in premises where a smoke or gas flue is used (for instance, an open fireplace or heating stove), an adequate supply air flow must be ensured A kitchen flue must be installed in accordance with applicable regulations. We recommend having a separate extract air device in the kitchen and a boost damper with dense blades to ensure heat recovery from air in kitchen. DUCT INSULATION In order for the installation of the unit to be effective, it is crucial that the installation of the ventilation ducts in the unit, as well as the installation of ducts through external walls containing insulation and vapour barriers, roofs and joists, is executed in a professional manner. Otherwise there is a risk of condensation, resulting in moisture damage. If older units are replaced, it is also necessary to inspect ducts and duct insulation for damage and ensure they are of adequate quality. Supply air ducts (T) and extract air ducts (F), i.e. ducts containing warm air, which are located in unheated spaces, must be insulated. The insulation should be installed externally and have a wind-proof surface. Outdoor air ducts (U) and exhaust air ducts (A), i.e. ducts filled with cold air, which are located inside the building s vapour barrier, must be insulated and have a diffusion-proof (moisture-proof) surface. Given the high degree of heat recovery achieved by the unit, the exhaust air also gets very cold and must be thermally insulated. Moreover, ducts which run alongside each other must have a common vapour barrier. For designations of the various ducts, see figure 15 on previous page. The wall on which the unit is to be installed must be well insulated. DUCTS IN WARM SPACES (INDOORS) The temperature of the air in the duct is above +10 C No insulation Supply air ducts (T) Extract air ducts (F) DUCTS IN COLD SPACES Supply air duct (T) Extract air duct (F) Moisture barrier DUCTS IN LOOSE WOOL Roof truss The temperature of the air in the duct is below +10 C Outdoor air duct (U) Exhaust air duct (A) Supply air duct (T) Extract air duct (F) Fire protection mesh mat 30 mm with moisture-proof surface Outdoor air duct (U) Exhaust air duct (A) Moisture barrier The sheet must be bound tightly to the duct. Min thickness 10 cm. Moisture barrier Moisture barrier RECOMMENDED INSULATION AND VAPOUR BARRIERS FOR DIFFERENT TYPES OF DUCTING Ducting type Approved material and location Duct in a warm space Insulation Vapour barrier All figures in this table are recommended values which apply in central Sweden. Please check for local variations. Duct in a cold space Insulation Vapour barrier Exhaust air (flue) In kitchen Sheet metal, accessible for inspection Armaflex AF3, 19 mm Yes Between joists and in attic Sheet metal Fire protection E15, Yes Fire protection E15, Only inside mesh mat 30 mm mesh mat 50 mm building's vapour barrier Exhaust air (no flue) Sheet metal Mineral wool 25 mm Yes Between joists and in attic Sheet metal Mineral wool 30 mm Yes Mineral wool 30 mm Yes From tumble dryer Sheet metal Mineral wool 30 mm No Mineral wool 100 mm No Outdoor air In kitchen Sheet metal, accessible for inspection Armaflex AF3, 19 mm Yes Between joists and in attic Sheet metal Mineral wool 60 mm Yes Inside building s vapour barrier Only inside Mineral wool 60 mm building's vapour barrier Supply air Mineral wool at least 80 mm Sheet metal No requirements Extract air or equivalent. No

16 Heat recovery unit RDKS - Technical manual INSTALLATION OPTIONS AND DUCT DEFINITIONS INTRODUCTION If the unit is not installed immediately after delivery, it should be stored well-protected under a roof in its original packaging. We recommend that the unit always be lifted by two people. Protective gloves should be worn. INSTALLATION OPTIONS The unit should be positioned as shown in the ventilation drawing. If no ventilation drawing is available, installation should be done according to one of the installation options below. The unit is intended for installation indoors in a warm space. DUCT DEFINITIONS!! To prevent accidents and injury: The unit must be connected to ducting and the door must be closed before the power is switched on. The unit must be connected to an earthed power outlet. A F K U T Figure 15. Duct definitions. T = Supply air F = Extract air U = Outdoor air A = Exhaust air K = Extract air device in kitchen (not above cooker). Ducts U and F should be increased to Ø125 mm as soon as space allows after the unit.

max 200 A B USB 70 69 6867 66 65 64 13141516 12 L N 11 27 38 3536 323334 Heat recovery unit RDKS - Technical manual 17 INSTALLATION OF UNIT WITH ACCESSORIES If the unit is not installed immediately after delivery, it should be stored well-protected under a roof in its original packaging. The unit is intended for installation indoors in a warm space, and may only be used while connected to ducts. We recommend that the unit be lifted into place by two people wearing protective gloves. 1 2 A 50 600 The unit must be connected to an earthed power outlet 50 X 1350* X mm A x 2 50 25 * Adapt to fit relevant cupboards NOTE! Distance from centre of upper stud to lower edge of unit = 650 mm 3 4 650 1) 46 47 48 49 50 51 5 N 4 L N 3 L 2 N 1 1) lower edge of unit 28 37 8 L N 7 L 6 650 1 2 A A 50 100 30 210 600 * Adapt to fit relevant cupboards Plaster Mineral wool A A NOTE! It is important from a sound perspective that the wall on which the unit is to be installed is well insulated.

18 Heat recovery unit RDKS - Technical manual INSTALLATION OF UNIT WITH ACCESSORIES, CONT D. 5 6 1 2 500 (If applicable) Ethernet cable 2 1 NOTE! If an Ethernet cable is used, make sure it is long enough to allow the unit door to be opened without problems. 7 8 3 RDKS RDKS 2 4 4.1 4.2 5 6 1 7 The picture shows a unit with a right-hand configuration.

Heat recovery unit RDKS - Technical manual 19 INSTALLATION OF UNIT WITH ACCESSORIES, CONT D. 9 INSTALLATION OF FRONT COVER RDKZ-15-b-c-ddd-e (ACCESSORY) 9.1 9.2 A A B B RDKZ-15 B B 1 3 3 A A 2 10 INSTALLATION OF EXTENSION UNIT TOWARDS THE CEILING RDKZ-17 WITH FRONT COVER RDKZ-15 AND SUSPENSION HOOKS RDKZ-16 (ACCESSORY) Ceiling/Wall Screw Side panel Front panel 11 INSTALLATION OF FRONT COVER RDKZ-15 WITH OVER-CABINET PANEL ABOVE KITCHEN CABINETS Section Over-cabinet panel (not included in delivery) Unit hatch (15 mm) RDKR 90 1) Cover panel Max 593 350 593 600 Spacer Kitchen cabinet Cover panel (included in RDKZ-14-b-0) Over-cabinet panel Front cover RDKZ-14 Overlap ca 10 mm An extension unit (kit) for the front cover is available to order. It is available in two heights to ensure coverage all the way up to the ceiling (see figure above). It can be adjusted to fit different cupboard depths and should be placed inside the front cover, slightly overlapping. Note! The front cover must be installed with suspension hooks in order to be able to Over-cabinet Section fit the extension panel unit. (not included in delivery) Unit hatch (15 mm) 90 1) For dismantling instructions, see www.flaktgroup.com 1) The measurement 90 refers to the distance from the outside of the unit door to the outer edge of the curve on the cover plate. Cover panel RDKR Cover pa Front cover RDKZ-14

20 Heat recovery unit RDKS - Technical manual RDKZ-41-1 CONTROL PANEL ISYTEQ BASIC - INSTALLATION AND CONNECTION The power supply must be switched off while control panel RDKZ-41-1 is being installed and dismantled.!! Make sure that the control cable is correctly connected to the control card before switching on the power supply. 1 3 2 4 ISYTEQ BASIC RDKZ-41-1 ISYTEQ TOUCH 3.5 RDKZ-41-3 1 N 70 69 68 67 66 65 64 6 7 CLICK 2 L 3 N 4 L 5 N 6 L 7 N A USB Ethernetkort (tillbehör) 51 50 49 48 47 46 8 8 L 11 N 12 L 13 14 15 16 27 B 28 32 33 34 35 36 37 38 5 Control card 9 To unit for connection. = Jumper 1 To unit for connection. back rear side 3 4 CLICK 5 2

Heat recovery unit RDKS - Technical manual 21 RDKZ-41-3 ISYTEQ TOUCH 3.5 CONTROL PANEL - INSTALLATION AND CONNECTION 1. Open the control panel using a screwdriver. 5. Connect the cable to the back of the display as shown above. NOTE! Do not touch the electronics. Push the display back into the enclosure. ISYTEQ TOUCH 3.5 RDKZ-41-3 ISYTEQ BASIC RDKZ-41-1 1 N 2 L 3 N 4 L 5 N 6 L 7 N 8 L 70 69 68 67 66 65 64 A USB Ethernet card (accessory) 51 50 49 48 47 46 2. Lift the display out of the enclosure. 11 N 12 L 13 14 15 16 27 B 28 32 33 34 35 36 37 38 6. Check that the control cable is correctly connected to the control card before switching on the power supply. 3. Push the connection cable through a suitable hole and if needed make an outlet for the cable on side of the cover. 4. Mount the enclosure directly on the wall or using the screws in a junction box.

22 Heat recovery unit RDKS - Technical manual ADJUSTMENT, COMMISSIONING (FOR INSTALLER AND SERVICE PERSONNEL) SETTINGS To enter the Settings menu: DATE / TIME 1. Press the gear cog button. 1. Set the date and continue by pressing Confirm. 2. Press the spanner button. 2. Set the time. Press Confirm. SELECT LANGUAGE 3. In this menu you can set the date, time and language. There is also the option of resetting the filter alarm in advance. Installers and service personnel can log in and access additional parameters. 1. Press the appropriate language flag. Press Confirm.

Heat recovery unit RDKS - Technical manual 23 LOGIN, SETTINGS LOGIN Installers and service personnel must log in to access Settings. The default (preset) password is 0000. This password can be changed. 1. Enter the correct password. Press Confirm. Use, for instance, the back of a pencil for greater precision. SETTINGS FOR INSTALLER AND SERVICE PERSONNEL For adjustment of fans, see page 24. For other settings, see parameter list on page 28.

24 Heat recovery unit RDKS - Technical manual ADJUSTMENT INTRODUCTION Adjustment of air flow and temperature may only be carried out by an installation engineer or service personnel. During adjustment, use the ISYteq Touch 3.5 control panel (accessory). Wrongly adjusted air flows may result in increased energy consumption and damage to the building. AIRFLOW ADJUSTMENT The speed of the fans is adjusted independently of each other. The picture shows an RDKS-1 unit. F A The picture shows an RDKS-2 unit. T U AIRFLOW CALCULATION The unit is equipped with four measurement points as per figure 16 above. Measuring the pressure difference, Dp m in Pa over the impeller gives the total supply air and extract air flows. The air flow q in l/s is determined using the following formula: q = 0.73 x Dp m where Dp m = measured pressure in point T measured pressure in point U or: where Dp m = measured pressure in point F measured pressure in point A PLANNING ADVICE In a rotary heat exchanger it is not possible to completely eliminate leakage between supply air and extract air. Air leakage at the seals is minimised by keeping the pressure difference between the supply air and extract air ducts as small as possible. Also check the pressure balance between supply air and extract air. Lower pressure on the supply air side can result in the transfer of moisture and odour. This is especially important if Forced mode is used. The pressure at point T should be higher than at point F. The pressure at point U should be higher than at point A. T F NOTE! Flow deviations of up to 25% may occur when this measurement method is used on a unit with a rotary heat exchanger. The measured flow values should only be regarded as indicative. Always perform control measurement in the supply and extract air devices. U A T = Supply air F = Extract air U = Outdoor air A = Exhaust air

Heat recovery unit RDKS - Technical manual 25 CONTROL PANEL OPERATION, COMMISSIONING ADJUSTMENT There are two ways to enter the adjustment menu. 1. The first is to press the question mark on the start screen. The question mark will not be shown if the menu has been opened previously. The unit can be ordered with two different configurations: Standard set the fan speed in % of max speed CO 2 control set the desired CO 2 level 2. The second is to go to Menu/Settings/Login and select 2 Adjustment. STANDARD Press 2.1 Start for a step-by-step guide through the settings required for adjustment. To change a single value, go directly to a specific menu. Option 1 Option 2 The speeds for each operating mode can be changed in two ways: Option 1 - Press the name Option 2 - Press the value

26 Heat recovery unit RDKS - Technical manual CONTROL PANEL OPERATION, COMMISSIONING Option 1 - Use the ± buttons. Configure the settings for the supply air fan in the same way. Option 2 - Enter the desired value, confirm with. Here you set the desired supply air temperature (setpoint). Note: This value is not to be confused with the desired indoor temperature, which is managed by the domestic heating system. The recommended setpoint is 16 19 C. The factory setting is 18 C. After configuring the settings, press Confirm and continue to the next step.

Heat recovery unit RDKS - Technical manual 27 CONTROL PANEL OPERATION, COMMISSIONING CO 2 control is only active at normal speed. At low and high speed, set the fan speed in % of max. speed. To complete the adjustment, click the brown check mark. CO2 CONTROL 1. Set the desired CO 2 setpoint. 2. Choose the minimum limit. This specifies whether the minimum limit should be low or normal speed. The speed cannot go below this value. 3. Set the relationship between the extract air and the supply air. The extract air is the master and the supply air is the slave.

28 Heat recovery unit RDKS - Technical manual PARAMETER LIST Note that incorrect parameter settings can cause moisture problems, operational disruption and other types of malfunction. For this reason, the settings must be configured by suitably qualified professionals. TEMPERATURES Parameter Type of value 1) Range Unit Standard value Comment Supply air temperature L -40-100 C Outdoor air temperature L -40-100 C Extract air temperature L -40-100 C Setpoint L/S 15-35 C 18 Desired supply air temperature Summer / Winter mode L Summer / Winter Output signal Postheater L 0-100 % Option Output signal Preheater L 0-100 % Option Output signal Rotor L 0-100 % Output signal Cooling L 0-100 % Not applicable to domestic ventilation Control mode / Current setpoint L 15-35 C FANS Parameter Type of value 1) Range Unit Standard value Comment Supply air fan speed L 0 or 30 100 % Extract air fan speed L 0 or 30 100 % AIR QUALITY Parameter Type of value 1) Range Unit Standard value Comment Relative humidity Supply air L 0-100 % RH Relative humidity Extract air L 0-100 % RH Moisture active L Yes / No Moisture control active or inactive CO 2 level L 0-2000 ppm Current CO 2 level in extract air Setpoint CO 2 L 0-2000 ppm 800 SYSTEM OVERVIEW Parameter Type of value 1) Range Unit Standard value Comment Software version control panel L Bootloader version control panel L Software version control card L Bootloader version control card L Unit type L Domestic IP Octet 1 L 0-255 Current IP address, accessory IP Octet 2 L 0-255 IP Octet 3 L 0-255 IP Octet 4 L 0-255 TIME SCHEDULES Parameter Type of value 1) Range Unit Standard value Comment Time schedules L Activated time channels, read-only 1) L/S = Editable value, L = Read-only value

Heat recovery unit RDKS - Technical manual 29 PARAMETER LIST SETTINGS Parameter Type of value 1) Range Unit Standard value Comment Date / Time L/S Select language L/S Swedish Reset filter alarm L/S For resetting alarm in advance Login L/S 0000-9999 0000 For installer and service personnel Settings For installer and service personnel 1. Time schedules Not applicable to domestic ventilation 2. Adjustment See page 24. 3. Timer function See separate document 4. Fans 4.1 Fan settings Automatic return forced mode L/S Yes / No Yes Forcing time L/S 0-9999 min 120 Start delay L/S 0-32767 s 10 Extract air fan and rotor start immediately, supply air fan starts after set time delay Rundown L/S 0-32767 s 0 Not applicable to domestic ventilation Heating stove time L/S 0-360 min 30 Reverts from heating stove mode after set time. 4.2 Pressure / Flow Not applicable to domestic ventilation 5. Heating / Cooling 5.1 Preheater Option Preheater L/S Yes / No Yes Setpoint preheater L/S -25-10 C -12 Filter heating L/S Yes / No No Not applicable to domestic ventilation 5.2 Heating / Cooling Control mode L/S 1-2 1 Not applicable to domestic ventilation Cooling sequence L/S Yes / No No Not applicable to domestic ventilation DX cooling L/S Yes / No No Not applicable to domestic ventilation Block heating in summer L/S Yes / No Yes Postheater L/S On / Off On Relative or absolute value L/S Rel / Abs Rel Used for setpoint in time channels 5.4 Defrosting Temperature setpoint defrosting L -25-10 C -10 5.5 Cooling recovery Cooling recovery L/S Yes / No Yes Temperature difference (outdoor air-extract air) L/S 0-15 C 2 Setpoint humidity L/S 0-100 % 50 5.6 Summer / Winter mode Summer/winter mode L Summer / Winter Automatic / Manual mode L/S Auto / Manual Auto Manual Winter / Summer L/S Summer / Winter Winter 5.8 Night setback Activate night setback L/S Yes / No No Start time L/S 00.00-23.59 22.00 Stop time L/S 00.00-23.59 06.00 Temperature difference L/S 0-20 C 3 Setpoint reduced during certain times 1 ) L/S = Editable value, L = Read-only value

30 Heat recovery unit RDKS - Technical manual PARAMETER LIST Parameter Type of value 1) Range Unit Standard value Comment 6. Air quality 6.1 CO 2 control CO 2 L/S Yes / No No Setpoint CO 2 L/S 0-2000 ppm 800 P-band L/S 0-2000 ppm 800 Int action time L/S 0-9999 s 600 ppm at 0 V L/S 0-9999 ppm 0 ppm at 10 V L/S 0-9999 ppm 2000 Min. limit CO 2 L/S Low / Normal Normal 6.2 Moisture control Moisture control L/S Yes / No Yes Absolute humidity supply air L 0-100 g/kg Absolute humidity extract air L 0-100 g/kg 7. Alarm management 7.1 Alarm settings Filter alarm time L/S 0-600 days 180 Set to 0 to deactivate filter alarm Summation alarm output A+B L/S Yes / No Yes Activate temperature alarm L/S Yes / No Yes Temperature alarm L/S -10 +10 C 5 Activate rotor belt test L/S Yes / No No Function not imported Tacho signal alarm L/S Yes / No Yes 7.2 Alarm categories Fire alarm L/S A/B A External function Sensor error supply air L/S A/B A Sensor error outdoor air L/S A/B A Sensor error extract air L/S A/B A Sensor error frost protection L/S A/B B Not applicable to domestic ventilation Sensor error defrosting L/S A/B B Not applicable to domestic ventilation Sensor error AI10 L/S A/B B Not applicable to domestic ventilation Filter alarm L/S A/B B Fan monitor, supply air L/S A/B B Not applicable to domestic ventilation Fan monitor, extract air L/S A/B B Not applicable to domestic ventilation Pressure monitor heat exchanger L/S A/B B Not applicable to domestic ventilation Rotor monitor L/S A/B A Filter monitor, supply air L/S A/B B Not applicable to domestic ventilation Filter monitor, extract air L/S A/B B Not applicable to domestic ventilation Overheating electric heater L/S A/B B Not applicable to domestic ventilation Circ. pump heating L/S A/B B Not applicable to domestic ventilation Frost protection L/S A/B B Not applicable to domestic ventilation Summation alarm cooling L/S A/B B Not applicable to domestic ventilation Circ. pump cooling L/S A/B B Not applicable to domestic ventilation Temperature alarm L/S A/B A Rotor belt alarm L/S A/B A Function not imported 7.3 Alarm delays Fire alarm L/S 0-9999 s 2 External function Sensor error supply air L/S 0-9999 s 5 Sensor error outdoor air L/S 0-9999 s 5 Sensor error extract air L/S 0-9999 s 5 Sensor error frost protection L/S 0-9999 s 5 Not applicable to domestic ventilation Sensor error defrosting L/S 0-9999 s 5 Not applicable to domestic ventilation Sensor error AI10 L/S 0-9999 s 5 Not applicable to domestic ventilation Fan monitor, supply air L/S 0-9999 s 120 Not applicable to domestic ventilation Fan monitor, extract air L/S 0-9999 s 120 Not applicable to domestic ventilation Rotor monitor L/S 0-9999 s 2 Not applicable to domestic ventilation Filter monitor, supply air L/S 0-9999 s 60 Not applicable to domestic ventilation Filter monitor, extract air L/S 0-9999 s 60 Not applicable to domestic ventilation Overheating electric heater L/S 0-9999 s 2 Not applicable to domestic ventilation Circ. pump heating L/S 0-9999 s 2 Not applicable to domestic ventilation Frost protection L/S 0-9999 s 2 Not applicable to domestic ventilation Summation alarm cooling L/S 0-9999 s 2 Not applicable to domestic ventilation Circ. pump cooling L/S 0-9999 s 2 Not applicable to domestic ventilation Temperature alarm L/S 0-9999 min 10 Rotor belt alarm L/S 0-9999 s 60 Function not imported 1 ) L/S = Editable value, L = Read-only value

Heat recovery unit RDKS - Technical manual 31 PARAMETER LIST Parameter Type of value 1) Range Unit Standard value Comment 7.4 Contact functions DI1 Timer input 1 L/S NO/NC NO DI2 Timer input 2 L/S NO/NC NO DI3 Rotation monitor L/S NO/NC NO Not applicable to domestic ventilation DI4 Pressure monitor defrosting L/S NO/NC NO Not applicable to domestic ventilation DI5 Fan / Filter monitor TF L/S NO/NC NO Not applicable to domestic ventilation DI6 Fan / Filter monitor FF L/S NO/NC NO Not applicable to domestic ventilation DI8 Fire alarm L/S NO/NC NO External function, should be changed to NC during use DI9 Cooker hood connector L/S NO/NC NO Not applicable to domestic ventilation DI7 Alarm heating L/S NO/NC NO Not applicable to domestic ventilation DI10 Alarm cooling L/S NO/NC NO Not applicable to domestic ventilation 8. Configuration 8.1 IP address L/S Static / Dynamic Dynamic Static = Manual setting Dynamic = Automatic assignment of IP address via DHCP IP address L/S Subnet mask L/S Gateway L/S 8.2 Menu config. Log to USB L/S Yes / No No Only for troubleshooting Unit type L Domestic Auto logout time L/S 0-32767 min 10 Threshold value heating L/S 0-100 % 0 For installer andservice personnel service personnel Threshold value cooling L/S 0-100 % 0 For installer andservice personnel service personnel Threshold value recovery L/S 0-100 % 0 For installer andservice personnel service personnel Threshold value external fan L/S 0-100 % 5 For installer andservice personnel service personnel 8.3 Screen saver Screen saver L/S On / Off On Time L/S min 10 8.4 Modbus Modbus slave address BMS L/S 0-255 2 Baud rate L/S 9.6, 19.2, 38.4 19.2 Parity L/S no parity, even, odd None Data bit L/S 7.8 8 Stop bit L/S 1.2 1 8.5 Mac address Mac address L 8.6 Reset 8.6.1 Soft reset Reset All values are reset except adjusted values and setpoints 8.6.2 Factory reset Reset All values are reset 8.7 Password Automatic logout L/S Yes / No Yes Password 1 L/S Used to change the password 8.8 Om Software HMI Software control card L Bootloader version L 1) L/S = Editable value, L = Read-only value

32 Heat recovery unit RDKS - Technical manual PARAMETER LIST Parameter Type of value 1) Range Unit Standard value Comment 9. Save values Saves adjusted values in control panel, max. 5 values Memory 1 Memory 2 Memory 3 Memory 4 Memory 5 10. Upload values Uploads saved adjusted values from control panel Memory 1 Memory 2 Memory 3 Memory 4 Memory 5 11. Save to SD Copies saved values to an SD card Memory 1 Memory 2 Memory 3 Memory 4 Memory 5 12. Load from SD Copies saved values from an SD card Memory 1 Memory 2 Memory 3 Memory 4 Memory 5 13. Test function Only for troubleshooting 13.1 Inputs 13.2 Outputs 14. Log out 1) L/S = Editable value, L = Read-only value

1 N 2 L 3 N 4 L 5 N 6 L 7 N 8 L 11 N 12 L 1314 15 16 70 69 68 67 66 65 64 27 A USB Ethernetkort (tillbehör) B 28 32 33 34 35 36 37 38 Heat recovery unit RDKS - Technical manual 33 REPLACEMENT PARTS RIGHT VERSION (RDKS-1) LEFT VERSION (RDKS-2) NOT SHOWN. 2 1 7 11 51 50 49 48 47 46 8 10 3 9 12 6 4 5 RDKZ-15 If the supply cord is damaged, it must be replaced by the manufacturer, an authorised service firm or a similarly qualified professional in order to avoid hazard. Pos. Designation Name Included in Quantity Comment 1 RDKR-99-01-1 Supply air fan, unit with right-hand configuration RDKS-1 1 1 RDKR-99-01-2 Supply air fan, unit with left-hand configuration RDKS-2 1 2 RDKR-99-02-1 Extract air fan, unit with right-hand configuration RDKS-1 1 2 RDKR-99-02-2 Extract air fan, unit with left-hand configuration RDKS-2 1 3 RDKR-99-03 Electric heater (preheater, postheater) RDKS-1 /RDKS-2 1 4 RDKS-99-02 Rotor, complete RDKS-1 /RDKS-2 1 5 RDKR-99-08 Drive belt, rotor RDKS-1 /RDKS-2 5 6 RDKS-99-01 Rotor motor RDKS-1 /RDKS-2 1 7 RDKS-99-03 Control card RDKS-1 /RDKS-2-a-b-c-d-1 1 8 RDKG-99-14 Flat filter G3 (1 x) RDKS-1 /RDKS-2 1 9 RDKG-99-15 Bag filter M5 (1 x) RDKS-1 /RDKS-2 1 9 RDKG-99-16 Bag filter F7 (1 x) RDKS-1 /RDKS-2 1 10 RDKG-99-22 Filter kit G3, without frame RDKS-1 /RDKS-2 10 11 RDKS-99-04 Temperature sensor RDKS-1.../RDKS-2... 3 12 RDKR-99-14 Brush strip RDKS-1.../RDKS-2... 1

34 Heat recovery unit RDKS - Technical manual EC DECLARATION OF CONFORMITY ENCLOSURE II A Declaration of Conformity In accordance with: EU Directive for Machinery, 2006/42/EC EU EMC Directive, 2014/30/EU EU Directive for Energy related Products ErP 2009/125/EC EU RoHS Directive, 2011/65/EU Manufacturer FläktGroup Sweden AB Fläktgatan 1 551 84 Jönköping Herewith declares that: Product Type: Ventilation unit Manufacturer: FläktGroup Sweden AB Commercial name: MiniMASTER, RDKS MiniMASTER, RDKG HouseMASTER, RDAS VillaMASTER, RDAF The machine is designed and manufactured in accordance with the following standards, in relevant parts. EN ISO 12100 EN 60204-1 EN 60335-1 EN 60335-2-40,31 EN 61000-6-1 EN 61000-6-3 EN 50106 EN 62233 EN 50581:2012 Safety of machinery General principles for design- Risk assessment and risk reduction Safety of machinery; electrical equipment of machines; general requirements Household and similar electrical appliances - Safety - Part 1: General requirements Household and similar electrical appliances - Safety - Part 2: Particular requirements Electromagnetic compatibility (EMC) - Part 6-1: Generic standards - Immunity for residential, commercial and light-industrial environments Emission standard for residential, commercial and light-industrial environments. Safety of household and similar electrical appliances - Particular rules for routine tests referring to appliances under the scope of EN 60335-1 Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous sustances A risk analysis has been made according to requirements of the Directive for Machinery. Authorized To prepare technical documentation: Ann-Sofie Andersson Design- R&D FläktGroup Sweden AB Fläktgatan 1 551 84 Jönköping The declaration applies only to the installation made according to FläkGroups instructions and assuming no changes made to the unit. Jönköping 20180424 Magnus Nilsson, Quality Manager, FläktGroup Sweden AB, Jönköping FläktGroup Sweden AB Postal Address Street Address Telephone Telefax Reg. no: FläktGroup Sweden AB Fläktgatan 1 Nat 036-19 30 00 Nat 036-19 31 40 556239-2463 S-551 84 Jönköping Int +46 36 19 30 00 Int +46 36 19 31 40 Reg. office: Sweden Jönköping 9850GB_RDKS_RDKG_RDAS_RDAF Declaration of conformity(2a)201804

Heat recovery unit RDKS - Technical manual 35 DISPOSAL OF PRODUCTS AND PACKAGING MATERIALS Separate at source according to local regulations. Depending on the product, the following should be removed when disposing of it: - Circuit boards, cables, coils, motors, sensors etc. - Filters other than metal ones (cooker hoods). - Packaging material such as corrugated cardboard, plastic and expanded polystyrene. - Everything else should be disposed of as metal. However, it should be noted that the unit also contains a vapour barrier, and sometimes mineral wool enclosed between the internal and external walls, which should be removed. - Light bulbs and fluorescent tubes See www.flaktgroup.com for recycling instructions.

MiniMASTER RDKS + ISYteq Basic PRODUCT INFORMATION IN ACCORDANCE WITH COMMISSION REGULATION (EU) NO. 1254/2014 ANNEX IV AS REFERRED TO IN ARTICLE 3(1b) (a) Brand (b) Model designation (c) Specific energy use (SEC) (d) Unit type (e) Drive unit (f) Heat recovery system FläktGroup MiniMASTER RDKS Climate zone SEC Energy class Cold -71.4 A+ Average -30.5 B Warm -7.0 F Bidirectional Stepless speed controller Regenerative rotary energy recovery (g) Thermal efficiency 80.5% (H) Maximum airflow 209 m 3 /h (i) Additional fan output, maximum flow (j) Sound power level 128 W 37 db(a) (k) Reference flow 0.041 m 3 /s (l) Reference pressure difference 50 Pa (m) Specified additional output 0.39 W/m 3 /h (n) Control type (o) Air leakage (p) Mixing rate (q) Visual filter alarm (r) Instructions exhaust air grille (s) Web address for dismantling and installation (t) Airflow sensitivity (u) Air tightness, unit not connected to duct (v) Annual electricity consumption (w) Annual heating saved Manual operation 2.9% (external 3.5% (internal) Not applicable Filter alarm ISYteq Basic Not applicable http://flaktgroup.com Not applicable Not applicable 492 kwh/year Climate zone Savings (kwh/year) Cold 8371 Average 4279 Warm 1935 FläktGroup DC-9842SE 20180122_R0