HEAT RECOVERY UNIT VILLAMASTER RDAF INSTALLATION, OPERATION, MAINTENANCE AND SPARE PARTS

HEAT RECOVERY UNIT VILLAMASTER RDAF INSTALLATION, OPERATION, MAINTENANCE AND SPARE PARTS

2 Heat recovery unit RDAF - Technical manual CONTENTS OPERATION AND MAINTENANCE (FOR USER) Functions, electrical data, energy class...3 Curo Touch control panel General information...4 Cleaning of the display...4 General buttons and symbols...4 Home screen...5 Operation...6 Maintenance and cleaning of heat exchanger and fans...8 Filter alarm, filter replacement...9 Overheating protection, temperature alarm, rotor alarm, other alarms...10 INSTALLATION (FOR INSTALLER AND SERVICE PERSONNEL) Dimensions and weight... 11 Wiring and connection diagram, external functions...12 Duct connection, duct insulation...13 Installation options and duct definitions...14 Installation, duct connection...15 Installation, connection Curo Touch control panel...16 ADJUSTMENT, COMMISSIONING (FOR INSTALLER AND SERVICE PERSONNEL) Settings, date/time, language...17 Settings, login...18 Adjustment...19 Control panel operation, commissioning...20 Parameter list...23 MISCELLANEOUS Spare parts...28 EC Declaration of Conformity...30 Disposal of products and packaging materials...31 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 RDAF - Technical manual 3 OPERATION AND MAINTENANCE (FOR USER) - FUNCTIONS, 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% htemp). 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 Curo Touch 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. The RDAF has 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 FILTER NOTE! THE ELECTRIC POSTHEATER IS ONLY ACTIVATED IF THE ROTOR IS IN OPERATION. The unit is fitted with class F7 filters for the supply air and class M5 filters for the extract air. For filter replacement, see page 7. CURO CONTROL UNIT A Curo control unit is integrated into the unit and controls the operation of the fans, the rotary heat exchanger and any electric heaters. The unit is controlled via an external Curo Touch control panel (accessory), which should be installed in a suitable place. DEFROSTING During cold periods, when frost may form in the rotor, 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 rotor 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 Curo 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 Curo Touch control panel (accessory) is used, the alarm will be presented in plain text (see separate instructions). 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. 1. Outdoor air sensor 2. Supply air filter 3. Preheater (RDAF Maxi has duct air heater) 4. Heat exchanger ELECTRICAL DATA Voltage: 230 V, single phase 50 Hz Size Fan motors 1) Preheater Postheater Rated output Output, W Output, W Output, W W Mini 166 1000 1000 2186 Midi 192 1000 1000 2212 Maxi 340 21002) 1000 3460 1) Refers to two fan motors ENERGY CLASS 5. Heat exchanger motor 6. Postheater 7. Supply air fan 8. Supply air sensor 9. Extract air sensor 10. Casing 11. Extract air filter 12. Control unit 13. Extract air fan 2) Duct air heater. Cannot be retrofitted on RDAF Maxi, generation 1 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 1253/2014.

4 Heat recovery unit RDAF - Technical manual CURO TOUCH 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. 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 RDAF - Technical manual 5 CURO TOUCH 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

6 Heat recovery unit RDAF - Technical manual CURO TOUCH CONTROL PANEL - OPERATION SHORTCUT TO SETTING OF TEMPERATURE SETPOINT See page7 for more information on temperatures. SHORTCUT TO SETTING OF DATE AND TIME ALARMS See page 7. SELECT OPERATING STATUS See page 7. MENU See page7. 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 RDAF - Technical manual 7 CURO TOUCH CONTROL 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 ( to domestic ventilation). SETTINGS See pages 17 18.. ALARM HISTORY

8 Heat recovery unit RDAF - 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 of pages 28 29. Figure 4. Before cleaning the heat exchanger, fans etc., the unit should always have the power disconnected. Pull out the plug. Figure 7. Vacuum clean the heat exchanger from both sides or blow clean with compressed air. CLEANING OF FANS Note that the fans must not be cleaned with water or other fluids; they may only be vacuum cleaned or brushed. 1. 2. 2. Figure 5. Open the unit by unscrewing the screws on the unit door (socket 13 mm). 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. We recommend that the rotor be lifted out by two people. Figure 8. Remove the fans from the unit. Disconnect the electrical connection. 1. 2. Figure 9. Clean the rotor with a brush or vacuum cleaner. Figure 6. Remove the heat exchanger from the unit. Disconnect the electrical connection to the rotor motor. During reassembly, check that the seals are positioned correctly.

Heat recovery unit RDAF - Technical manual 9 FILTER ALARM AND FILTER REPLACEMENT 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. 2. Open the unit by unscrewing the screws on the unit door. Figure 13. Opening of unit door. 3. Pull out the supply air and exhaust air filters (see figure 14). Dispose of used filters according to local waste regulations. Figure 10. The information symbol indicates alarm B. Extract air filter Supply air filter Figure 14. Location of filters in unit. Figure 11. Showing and resetting of filter alarm. A built-in timer is normally set to provide a filter replacement reminder every six months. When replacing dirty filters, use of a face mask is recommended (lowest class, FFP2). To replace the filter, follow the steps below. 1. Disconnect the unit from the power supply. 4. Insert new filters. 5. Reinstall the filter hatch. 6. Connect the plug. 7. After replacing the filter, the filter alarm should be reset by pressing Acknowledge (see figure 11). If a filter is replaced before the alarm is due, the filter alarm timer must be reset. To do this, press Reset filter alarm in the Settings menu. Figure 12. Pull out the plug. Figure 15. Resetting of filter alarm timer.

10 Heat recovery unit RDAF - Technical manual OVERHEATING PROTECTION, TEMPERATURE ALARM, ROTOR 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. If the manual overheating protection trips again, call qualified service personnel. TEMPERATURE ALARM Generates an alarm and stops operation if the supply air temperature drops below +5 C. The alarm is disabled during defrosting. A 10-minute delay ensures that the supply air temperature has time to rise if operation has been stopped. ROTOR ALARM If the rotor motor stops and the Tacho signal disappears, five attempts will 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. OTHER ALARMS The unit has various other alarms, which are shown in plain text in the Curo Touch control panel. If the alarm recurs after being cleared, call service personnel for assistance.

Heat recovery unit RDAF - Technical manual 11 DIMENSIONS AND WEIGHT A C H H1 E F J G L ØD ØD Extract air Exhaust air B Supply air Outdoor air All dimensions are in mm. Size L W H H1 A C ØD E F G J Weight, kg Mini 950 540 475 442 150 240 160 190 100 38 10 57 Midi 1000 580 510 480 155 270 200 207 100 37 10 67 Maxi 1200 750 685 652 198 355 250 247 195 43 10 109 PREHEATER FOR RDAF MAXI, GENERATION 2. 278 267 42 42 82 Ø250 375 Reset of manual thermal overload protection Weight 6 kg

12 Heat recovery unit RDAF - Technical manual WIRING AND CONNECTION DIAGRAM, EXTERNAL FUNCTIONS CONTROL CARD Door switch L N PE NOTE! DO NOT connect the Curo Basic RDKZ-41-1 control control panel to this connection as it risks being damaged by excessive current. Modbus RS485 B A Ref Supply air fan N L 0V 10V Extract air fan N L 0V 10V Preheater Mini, Midi N L Rotor Preheater Maxi, duct air heater Relay board N L Techo 100 101 102 103 104 105 106 107 108 109 Post Heater N L Collective fault alarm max 24V, 0.2 A 1 2 3 4 5 6 7 8 9 10 11 12 13 70 69 68 67 66 65 64 63 62 61 60 59 58 Curo Touch control panel Moisture sensor supply air USB only for update 57 56 55 54 53 52 51 50 Curo Basic control panel 49 48 47 46 45 44 43 42 15 17 19 21 23 2425 27 29 31 34 37 39 14 16 41 18 20 22 26 28 30 32 33 35 36 38 40 Moisture sensor extract air B M Temperature outdoor air B M Temperature extract air B M Temperature supply air Start Alarm Control signal NO C NC M Y G0 Timer 1 Timer 2 G G0 Y CO 2 sensor EXTERNAL FUNCTIONS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 C NO Collective fault alarm Max 24V, 200 ma DI M DI M Timer 1 Timer 2 GND +24 V Output 0-10 V CO 2 sensor C NC Alarms Y G0 Control signal Preheater Maxi, supplied with power separately C NO Start signal Figure 13. The diagram above shows connection of external functions. Figure 14. Preheater RDAF Maxi.

Heat recovery unit RDAF - Technical manual 13 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. 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 Duct definitions on the next 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

14 Heat recovery unit RDAF - 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. The Mini/Midi unit should always be lifted by two people, while the Maxi unit should be lifted by four 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 cold space, for instance an attic. LOCATION OF THE UNIT IN BUILDINGS WITH 1½ STOREYS DUCT DEFINITIONS Figure 15. Duct definitions.! F T A U T = Supply air F = Extract air U = Outdoor air A = Exhaust air To prevent accidents and injury: The unit must be connected to ducting and the door must be closed before the power is switched on. 11! The unit must be connected to an earthed power outlet. 10 5 12 10 LOCATION OF THE UNIT IN HOUSES WITH A DRY, UNFURNISHED ATTIC. >1600 Unheated space 10 5 11 12 1 8 5 3 2 1 Minimum distance from combustible structural components, 20 mm 1. Exhaust air duct 2. T-piece ducting 3. Sealing cap 4. Supply air duct 5. Heat recovery unit RDAF 6. Mineral wool slab, min. 50 mm thick 7. Sleeve 8. Ducting with bend 9. Roof lead-through with extract air ventilation 10. Supply air device (roof air supply) 11. Silencer 12. Supply air duct 13. Extract air duct 14. Outdoor air duct 12 13 6 8 7 14

Heat recovery unit RDAF - Technical manual 15 INSTALLATION, DUCT CONNECTION INSTALLATION The unit should be placed: on a mineral wool slab with a thickness of at least 50 mm on a stable surface. at a distance of 20 mm between the outermost edges of the casing and combustible structural components. INSTALLATION OPTIONS FREE SPACE FOR INSPECTION To allow inspection and replacement of components, free space is required next to the unit door as follows: RDAF Mini = 640 mm RDAF Midi = 680 mm RDAF Maxi = 850 mm DUCT CONNECTION RDAF Mini = 160 mm RDAF Midi = 200 mm RDAF Maxi = 250 mm 1 2 With the unit door at the top (1) or on the side with the electrical connection upwards (2). Avluft, ut Frånluft Uteluft, in Tilluft x 4 Mineralullsmatta, tjocklek 50 mm Stabilt underlag Montering av fötter, kan höjdjusteras ± 10 mm

16 Heat recovery unit RDAF - Technical manual CONTROL PANEL CURO TOUCH RDKZ-41-3 - 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. CURO TOUCH RDKZ-41-3 2. Lift the display out of the enclosure. 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 B 11 N 12 L 13 14 15 16 27 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.

Heat recovery unit RDAF - Technical manual 17 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.

18 Heat recovery unit RDAF - Technical manual LOGIN, INSTALLER AND SERVICE PERSONNEL 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 19. For other settings, see parameter list on page 24.

Heat recovery unit RDAF - Technical manual 19 ADJUSTMENT Adjustment of air flow and temperature may only be carried out by an installation engineer or service personnel. Wrongly adjusted air flows may result in increased energy consumption and damage to the building. FLOW ADJUSTMENT The speed of the fans is adjusted independently of each other. 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 rotor gives the total supply air and extract air flows. The air flow q in l/s is determined using the following formula: q = 1.3 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 T U F 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 = Supply air F = Extract air U = Outdoor air A = Exhaust air 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.

20 Heat recovery unit RDAF - Technical manual 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

Heat recovery unit RDAF - Technical manual 21 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.

22 Heat recovery unit RDAF - Technical manual 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 green check mark. CO 2 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.

Heat recovery unit RDAF - Technical manual 23 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 % 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

24 Heat recovery unit RDAF - Technical manual 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 to domestic ventilation 2. Adjustment See page 19. 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 to domestic ventilation Heating stove time L/S 0-360 min 30 Reverts from heating stove mode after set time. 4.2 Pressure / Flow 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 to domestic ventilation 5.2 Heating / Cooling Control mode L/S 1-2 1 to domestic ventilation Cooling sequence L/S Yes / No No to domestic ventilation DX cooling L/S Yes / No No 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

Heat recovery unit RDAF - Technical manual 25 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 to domestic ventilation Sensor error defrosting L/S A/B B to domestic ventilation Sensor error AI10 L/S A/B B to domestic ventilation Filter alarm L/S A/B B Fan monitor, supply air L/S A/B B to domestic ventilation Fan monitor, extract air L/S A/B B to domestic ventilation Pressure monitor heat exchanger L/S A/B B to domestic ventilation Rotor monitor L/S A/B A Filter monitor, supply air L/S A/B B to domestic ventilation Filter monitor, extract air L/S A/B B to domestic ventilation Overheating electric heater L/S A/B B to domestic ventilation Circ. pump heating L/S A/B B to domestic ventilation Frost protection L/S A/B B to domestic ventilation Summation alarm cooling L/S A/B B to domestic ventilation Circ. pump cooling L/S A/B B 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 to domestic ventilation Sensor error defrosting L/S 0-9999 s 5 to domestic ventilation Sensor error AI10 L/S 0-9999 s 5 to domestic ventilation Fan monitor, supply air L/S 0-9999 s 120 to domestic ventilation Fan monitor, extract air L/S 0-9999 s 120 to domestic ventilation Rotor monitor L/S 0-9999 s 2 to domestic ventilation Filter monitor, supply air L/S 0-9999 s 60 to domestic ventilation Filter monitor, extract air L/S 0-9999 s 60 to domestic ventilation Overheating electric heater L/S 0-9999 s 2 to domestic ventilation Circ. pump heating L/S 0-9999 s 2 to domestic ventilation Frost protection L/S 0-9999 s 2 to domestic ventilation Summation alarm cooling L/S 0-9999 s 2 to domestic ventilation Circ. pump cooling L/S 0-9999 s 2 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

26 Heat recovery unit RDAF - Technical manual 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 to domestic ventilation DI4 Pressure monitor defrosting L/S NO/NC NO to domestic ventilation DI5 Fan / Filter monitor TF L/S NO/NC NO to domestic ventilation DI6 Fan / Filter monitor FF L/S NO/NC NO 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 to domestic ventilation DI7 Alarm heating L/S NO/NC NO to domestic ventilation DI10 Alarm cooling L/S NO/NC NO 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

Heat recovery unit RDAF - Technical manual 27 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

28 Heat recovery unit RDAF - Technical manual REPLACEMENT PARTS 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. RDAF-1 MINI Pos. Designation Name Included in Quantity Comment 1 RDAF-99-01-1 Motor with rotor RDAF-1 1 2 RDAF-99-02-1 Rotor, complete RDAF-1 1 3 RDAF-99-03-1 Drive belt, rotor RDAF-1 1 4 RDKS-99-01 Rotor motor RDAF-a 1 5 RDAF-99-04-2 Slide rail rotor RDAF-1 1 6 RDAF-99-07-1 Control box, complete RDAF-a 1 7 RDAZ-21-1 Filter kit (1 M5, 1 F7) RDAF-1 1+1 8 RDAF-99-05-1 Electric heater, postheater RDAF-a 1 9 RDAF-99-06-1 Brush strip RDAF-1 1 10 RDAF-99-05-1 Electric heater, preheater RDAF-1 1 Only for replacement of faulty preheater

Heat recovery unit RDAF - Technical manual 29 REPLACEMENT PARTS RDAF-2 MIDI Pos. Designation Name Included in Quantity Comment 1 RDAE-99-01-1 Motor with rotor RDAF-2 1 2 RDAE-99-02-1 Rotor, complete RDAF-2 1 3 RDAR-99-03-1 Drive belt, rotor RDAF-2 1 4 RDKS-99-01 Rotor motor RDAF-a 1 5 RDAF-99-04-2 Slide rail rotor RDAF-2 1 6 RDAF-99-07-1 Control box, complete RDAF-a 1 7 RDAZ-12 Filter kit (1 M5, 1 F7) RDAF-2 1+1 8 RDAF-99-05-1 Electric heater, postheater RDAF-a 1 9 RDAR-99-04-1 Brush strip RDAF-2 1 10 RDAF-99-05-1 Electric heater, preheater RDAF-2 1 Only for replacement of faulty preheater RDAF-3 MAXI Pos. Designation Name Included in Quantity Comment 1 RDAF-99-01-3 Motor with rotor RDAF-3 1 2 RDAF-99-02-3 Rotor, complete RDAF-3 1 3 RDAF-99-03-3 Drive belt, rotor RDAF-3 1 4 ABRA-99-00-02 Rotor motor RDAF-a 1 5 RDAF-99-04-3 Slide rail rotor RDAF-3 1 6 RDAF-99-07-1 Control box, complete RDAF-a 1 7 RDAZ-21-3 Filter kit (1 M5, 1 F7) RDAF-3 1+1 8 RDAF-99-05-1 Electric heater, postheater RDAF-a 1 9 RDAF-99-06-3 Brush strip RDAF-3 1 * Electric heater, preheater for RDAF-3 Maxi is a separate duct air heater (see page 11, Dimensions and weight). Note! Can only be used for RDAF Maxi, generation 2.

30 Heat recovery unit RDAF - 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 RDAF - Technical manual 31 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.

VillaMASTER RDAF Mini + Curo Basic + CO 2 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 VillaMASTER RDAF Mini Climate zone SEC Energy class Cold 67,5 A+ Average 29,0 B Warm 6,9 F Bidirectional Stepless speed controller Regenerative rotary energy recovery (g) Thermal efficiency 78,9 % (H) Maximum airflow 353 m 3 /h (i) Additional fan output, maximum flow (j) Sound power level 175 W 37 db(a) (k) Reference flow 0,069 m 3 /s (l) Reference pressure difference 50 Pa (m) Specified additional output 0,36 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 control 1,4 % (external) 3,0 % (internal) Filter alarm Curo Basic http://flaktgroup.com 449 kwh/year Climate zone Savings (kwh/year) Cold 7863 Average 4019 Warm 1817

VillaMASTER RDAF Mini + Curo Touch 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 VillaMASTER RDAF Mini Climate zone SEC Energy class Cold 69,1 A+ Average 30,4 B Warm 8,2 F Bidirectional Stepless speed controller Regenerative rotary energy recovery (g) Thermal efficiency 78,9 % (H) Maximum airflow 353 m 3 /h (i) Additional fan output, maximum flow (j) Sound power level 175 W 37 db(a) (k) Reference flow 0,069 m 3 /s (l) Reference pressure difference 50 Pa (m) Specified additional output 0,36 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 Clock control 1,4 % (external) 3,0 % (internal) Filter alarm Curo Touch http://flaktgroup.com 405 kwh/year Climate zone Savings (kwh/year) Cold 7925 Average 4051 Warm 1832

VillaMASTER RDAF Mini + Curo Touch + CO 2 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 VillaMASTER RDAF Mini Climate zone SEC Energy class Cold 72,4 A+ Average 33,0 B Warm 10,5 F Bidirectional Stepless speed controller Regenerative rotary energy recovery (g) Thermal efficiency 78,9 % (H) Maximum airflow 353 m 3 /h (i) Additional fan output, maximum flow (j) Sound power level 175 W 37 db(a) (k) Reference flow 0,069 m 3 /s (l) Reference pressure difference 50 Pa (m) Specified additional output 0,36 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 Central on-demand control 1,4 % (external) 3,0 % (internal) Filter alarm Curo Touch http://flaktgroup.com 324 kwh/year Climate zone Savings (kwh/year) Cold 8050 Average 4115 Warm 1861

VillaMASTER RDAF Midi + Curo 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 VillaMASTER RDAF Midi Climate zone SEC Energy class Cold 72,3 A+ Average 40,0 B Warm 8,9 F Bidirectional Stepless speed controller, steglös injustering Regenerative rotary energy recovery (g) Thermal efficiency 78,5 % (H) Maximum airflow 454 m 3 /h (i) Additional fan output, maximum flow (j) Sound power level 209 W 47 db(a) (k) Reference flow 0,088 m 3 /s (l) Reference pressure difference 50 Pa (m) Specified additional output 0,33 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 control 1,2 % (external) 2,6 % (internal) Filter alarm Curo Basic http://flaktgroup.com 407 kwh/year Climate zone Savings (kwh/year) Cold 8247 Average 4216 Warm 1906

VillaMASTER RDAF Midi + Curo Touch 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 VillaMASTER RDAF Midi Climate zone SEC Energy class Cold 74,0 A+ Average 33,3 B Warm 10,0 F Bidirectional Stepless speed controller, steglös injustering Regenerative rotary energy recovery (g) Thermal efficiency 78,5 % (H) Maximum airflow 454 m 3 /h (i) Additional fan output, maximum flow (j) Sound power level 209 W 47 db(a) (k) Reference flow 0,088 m 3 /s (l) Reference pressure difference 50 Pa (m) Specified additional output 0,33 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 Clock control 1,2 % (external) 2,6 % (internal) Filter alarm Curo Touch http://flaktgroup.com 368 kwh/year Climate zone Savings (kwh/year) Cold 8314 Average 4250 Warm 1922

VillaMASTER RDAF Midi + Curo Touch + CO 2 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 VillaMASTER RDAF Midi Climate zone SEC Energy class Cold 77,1 A+ Average 35,8 A Warm 12,2 E Bidirectional Stepless speed controller, steglös injustering Regenerative rotary energy recovery (g) Thermal efficiency 78,5 % (H) Maximum airflow 454 m 3 /h (i) Additional fan output, maximum flow (j) Sound power level 209 W 47 db(a) (k) Reference flow 0,088 m 3 /s (l) Reference pressure difference 50 Pa (m) Specified additional output 0,33 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 Central on-demand control 1,2 % (external) 2,6 % (internal) Filter alarm Curo Touch http://flaktgroup.com 294 kwh/year Climate zone Savings (kwh/year) Cold 8448 Average 4318 Warm 1953