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1 R E P O R T W R G D I N E N Test laboratory Test object Customer Scope of assignment Date of receipt of test object TÜV SÜD Industrie Service GmbH Center of Competence for Refrigeration and Air Conditioning Air Conditioning and Ventilation Central ventilation unit with heat recovery type Smarty 2X P of the company SALDA UAB SALDA UAB Ragainės g.100, Šiauliai LT Litauen Tests according to DIN EN : Date: Our reference: IS-TAK3-MUC/ bu Document: wrg443 SALDA Smarty 2X P REPORT EN bukl.docx Test period Test location Expert Munich Nuremberg Thomas Busler / Heiko Mirring Test specification DIN EN : DIN EN ISO 5801: DIN EN 308: This document consits of 9 Pages + 30 Appendices Page 1 of 9 Excerpts from this document may only be reproduced and used for advertising purposes with the express written approval of TÜV SÜD Industrie Service GmbH. The test results refer exclusively to the units under test.. Headquarters: Munich Trade Register Munich HRB VAT ID No. DE Information pursuant to Section 2(1) DL-InfoV (Germany) at Supervisory Board: Karsten Xander (Chairman) Board of Management: Ferdinand Neuwieser (CEO), Dr. Ulrich Klotz, Thomas Kainz Phone: Fax: is-tak@tuev-sued.de TÜV SÜD Industrie Service GmbH Center of Competence für Kälte- und Klimatechnik Klima- und Lufttechnik Ridlerstraße München Deutschland

2 Page 2 of 9 1. Scope of testing The company SALDA UAB ordered tests to be conducted on a ventilation unit with heat recovery type Smarty 2X P in accordance with the standard DIN EN : Description of the ventilation unit type Smarty 2X P The structure of the ventilation unit with heat recovery is pictured in figure 1. Bypass optional el. heater Extract air G4 F7 Outdoor air Supply air Exhaust air Figure 1: Schematic diagram of the central ventilation unit with heat recovery, type Smarty 2X P of the company SALDA UAB Images of the ventilation unit with heat recovery are shown in appendices A. Data pertaining to the tested ventilation unit and its built-in components are listed in appendices B. The operation range declared by the manufacturer of the ventilation unit is limited to new and redeveloped single-family houses. The ventilation unit can be mounted on the floor, a wall or at the ceiling. The mounting can be realized with the additional mounting accessories. Exhaust air condensate can be discharged through an open drainage.

3 Page 3 of 9 3. Procedure of the tests The tests were performed at the test facilities of the Center of Competence for Refrigeration and Air Conditioning of the TÜV SÜD Industrie Service GmbH. The tests comprise the reception inspection, the tightness tests, the ventilation tests, the thermodynamic tests, a cold climate test and acoustic tests. The acoustic tests were performed at the Test lab No. DGA-PL A list of the used measurement equipment is deposited at the test centre Reception inspection The relevant technical data of the ventilation unit were recorded during the reception inspection Leakage test External leakage test The external leakage of the ventilation unit was determined by means of establishing a pressure difference between the interior of the unit and its environment. The measured air volume flow required to maintain the pressure difference constitutes the external leakage Internal leakage test In order to determine the leakage volume flow between the exhaust air / extract air side and the outdoor air / supply air side, the exhaust air / extract air side of the unit were pressurised and a volume flow was supplied to or extracted from the outdoor air / supply air side, so as to keep the differential pressure between the environment and the outdoor air / supply air side at zero. As there is no differential pressure between the environment and the outdoor air / supply air side, the leakage volume flow corresponds to the ingoing or outgoing volume flow which exists when the specified differential pressures are adjusted Ventilation test The ventilation test was conducted with a test chamber in accordance with the standard DIN EN ISO 5801: The air temperature during the test was 21 C +/- 2 K. The measurement of the air flows was done at both airflow directions simultaneously at the same pressure level. The measured air flow curves include the following working points: q min at 50 Pa 0.7 x q vd at 50 Pa q vd at 100 Pa The recorded real electric power consumption values relate to the entire unit and are not corrected by the density of the air. The specific power input of the ventilation unit was related to the mean value of the extract and supply air flow.

4 Page 4 of Filter-bypass leakage By the reception inspection, the filter bypass leakage will be visually checked. The filter and the filter frame shall be constructed in order to achieve an easy change of the filter and a tight fitting of the filter. The tight fitting of the filter shall not be influenced by humidity Thermodynamic test The thermodynamic test was conducted in a double climate chamber. The data pertaining to the incoming and outgoing airflow (temperature, humidity, air volume flow) and the total real electric power consumption of the ventilation unit were recorded at the system boundaries of the central ventilation unit. Hereby the caloric mean temperature 1 was determined in accordance with the standard DIN EN 308: The entrance of the extract air into and the outlet of the exhaust air, as well as the entrance of the outdoor air into and the outlet of the supply air of the ventilation unit, were defined as system boundaries. A scheme of the thermodynamic test setup is shown in Figure 2. Symbols: Group 1 Measuring device Group 2 Measuring device F Volume flow R Recording T Temperature E Electrical Data X Humidity P Static pressure Figure 2: Scheme of the thermodynamic test, 1 The caloric mean temperature describes the mean temperature of the temperature probes at the system boundaries of the unit, which is the basis for the calculation of the energy content of the air flows.

5 Page 5 of 9 The thermodynamic tests were performed at the following conditions: Symbol Condition 1 Condition 2 Outdoor air dry bulb temperature t 21 7 C 2 C Outdoor air wet bulb temperature twb 21-1 C Extract air dry bulb temperature t C 20 C Extract air wet bulb temperature twb C 15 C Here the following air flows and external static pressures were preset: q min 40 m³/h at 50 Pa 0.7 x q vd 142 m³/h at 50 Pa q vd 203 m³/h at 100 Pa 3.6. Cold Climate test The cold climate test was done with an external electrical preheater. The cold climate test was carried out following the thermodynamic test. Here, the outside air temperature, starting from 2 C, is gradually decreased and determines the switch-on temperature frost protection strategy. In addition, the effectiveness of the frost protection strategy was investigated within the scope of a cycle test. The test was carried out with the reference volume flow 0.7 x q vd and under the following conditions: Symbol Condition Outdoor air dry bulb temperature t C Outdoor air wet bulb temperature twb 21 - Extract air dry bulb temperature t C Extract air wet bulb temperature twb C 3.7. Acoustic test The acoustic tests were conducted in a reverberation room. The tests were performed at the reference volume flow and a static pressure of 50 Pa. The radiated sound power of the unit and the sound power of the connecting ducts were measured according to the DIN EN ISO :

6 Page 6 of 9 4. Test results 4.1. Reception inspection The identified relevant technical data of the ventilation unit and its installed components are listed in Appendices B. The visual inspection of the central ventilation unit yielded the following results: - Unit labelling - The unit was equipped with a type plate. - The unit was marked with a CE sign. - The type plate contented no information s about the address of the manufacturer. - Electrical safety - The electrical parts were accessible if the cover of the unit was open. - By opening the unit cover the ventilation unit is not switched off via a contact switch. - Tools are required for opening the unit cover. - Mechanical safety - Rotating parts of the unit were accessible when the unit was open. - Components with hot surfaces were accessible when the unit was open. - The unit will not be cut out by opening the unit cover. - Tools are required for opening the unit cover. - Operation and installation - The unit can operated by control panels of the types Ptouch, Stouch or by Mod Bus gateway (MB Gateway). - With the control panel type Ptouch it is possible to set up further service applications on the ventilation unit. - The Stouch control panel is only used to switch between the four available fan speeds - About the MB Gateway it is possible to adjust the parameters of the device via web browser. This variant was used to conduct the tests. - The device controllers are equipped with four different fan speeds to which different fan voltages can be assigned. - To balance the two air flow rates it is possible to adjust different voltages on the fans. - Maintenance - The filters are situated at the outdoor and extract side. They can be removed over the Filter access panels. - The unit was equipped with a run time based filter control. At the end of the adjustable time interval, the user will be informed through the control panel of the unit.

7 Page 7 of Tightness test The results of the external and internal tightness test are listed in Appendix C. The leakage related to the maximum declared air volume flow of 203 m³/h is: -250 Pa +250 Pa Leakage class external leakage F7 / G4 1.3 % 1.2 % A1 Filtercombination Filtercombination -100 Pa +100 Pa Leakage class internal leakage F7 / G4 0.5 % 0.5 % A1 According to the standard DIN EN : , the leakage class is A Ventilation test The pressure-airflow curves of the exhaust air / extract airside and the outdoor air / supply air side are shown in Appendices D. The values measured in the ventilation test are listed in Appendices E Filter-bypass leakage The tight fitting of the filter was checked by a visual inspection. The material of the filter is water-repellent Thermodynamic test Thermodynamic test points are shown in Appendix F. The measurements and calculated values from the thermodynamic test are listed in Appendices G Cold climate test The tests to describe the behaviour of the ventilation unit in frost protection case were carried out with an external electric preheater. The outdoor air temperature the cold climate strategy was activated was approximately -8.0 C with electric preheating. The cycle tests to verify the effectiveness of frost protection carried out at an outdoor air temperature of approximately -15 C showed that the frost protection strategies are effective. A description of the frost protection strategy is given in Appendix H. Diagrams illustrating the test sequence are shown in Appendix I Acoustic test The results of the acoustic test are shown in Appendix J.

8 Page 8 of 9 5. Summary 5.1. Reception inspection The unit was equipped with a type plate and marked with a CE sign. The type plate provides no information about the address of the manufacturer and the year of production The fans are situated on the exhaust air side and the supply air side. The unit was equipped with a run-time based filter control 5.2. Tightness test The leakage class according to the standard DIN EN : is A Ventilation test The pressure-airflow curves of the exhaust air / extract airside and the outdoor air / supply air side are shown in appendices D. The values measured in the ventilation test are listed in Appendices E Filter-bypass leakage The tight fitting of the filter was checked by a visual inspection. The material of the filter is water-repellent Thermodynamic test For the ventilation unit the following type specific data were determined: (see also Appendices G): Temperature ratio related to supply Air volume flow side η θ,su in % Θ outdoor air = 7 C Θ outdoor air= 2 C q min x q vd q vd Temperature ratio related to Air volume flow exhaust side η θ,exh in % Θ outdoor air = 7 C Θ outdoor air= 2 C q min x q vd q vd

9 Page 9 of 9 Spezific elect. power input p el in Air volume flow W/(m³/h) 2 Θ outdoor air= 7 C Θ outdoor air= 2 C q min x q vd q vd Cold climate test The outdoor air temperature the cold climate strategy was activated was approximately -8.0 C with electric preheating. The cycle tests to verify the effectiveness of frost protection carried out at an outdoor air temperature of approximately -15 C showed that the frost protection strategies are effective. 5.7 Acoustic test The determined acoustical values are shown Appendix J. Center of Competence for Refrigeration and Air Conditioning Head of Laboratory Expert Andreas Klotz Thomas Busler Appendices Appendices A1 to A16 Appendices B1 to B3 Appendix C Appendices D1 and D2 Appendices E1 and E2 Appendix F Appendix G1 and G2 Appendix H Appendix I Appendix J Images of the test sample Data pertaining to the tested unit Results of the tightness tests Pressure-airflow curves Measurements from the ventilation test Thermodynamic test points Measurements and calculated values from the thermodynamic test Description of the cold climate strategy Diagram of the cold climate test Results of the acoustic tests 2 To determine the specific power input, the average of the supply and extract air flow rate was used.

10 Appendix A1 Images of the test sample Figure A-1: Drawing of the ventilation unit

11 Appendix A2 Images of the test sample Supply Extract Outdoor Exhaust Figure A-2: Front view of the ventilation unit Outdoor Exhaust Figure A-3: Bottom of the ventilation unit

12 Appendix A3 Images of the test sample Extract Supply Figure A-4: Top of the ventilation unit Figure A-5: View of the ventilation unit without front cover

13 Appendix A4 Images of the test sample Figure A-6: View of the ventilation unit without front cover, filter and drain Figure A-7: View of the ventilation unit without front cover, filter, drain and heat exchanger

14 Appendix A5 Images of the test sample Figure A-8: View of the ventilation unit without front cover, filter, drain and heat exchanger Figure A-9: Front Cover of the ventilation unit

15 Appendix A6 Images of the test sample Figure A-10: outdoor air filter (class F7) of the ventilation unit Figure A-10: extract air filter (class G4) of the ventilation unit

16 Appendix A7 Images of the test sample Figure A-12: Supply air fan of the ventilation unit Figure A-13: Type plate of the supply fan of the ventilation unit

17 Appendix A8 Images of the test sample Figure A-14: Exhaust air fan of the ventilation unit Figure A-15: Type plate of the exhaust fan of the ventilation unit

18 Appendix A9 Images of the test sample Figure A-16: Drain of the ventilation unit Figure A-17: Heat exchanger of the ventilation unit

19 Appendix A10 Images of the test sample Figure A-18: Heat exchanger of the ventilation unit and type plate Figure A-19: Type plate of the bypass motor

20 Appendix A11 Images of the test sample Figure A-20: Bypass of the ventilation unit Figure A-21: Type plate of the external electrical preheater

21 Appendix A12 Images of the test sample Figure A-22: External electrical preheater without cover Figure A-23: External electrical preheater

22 Appendix A13 Images of the test sample Figure A-24: Temperature sensor of the electrical preheater Figure A-25: Electrical assembly of the ventilation unit

23 Appendix A14 Images of the test sample Figure A-26: P-touch controller of the ventilation unit Figure A-27: S-touch controller of the ventilation unit

24 Appendix A15 Images of the test sample Figure A-28: Mod Bus Gateway of the ventilation unit Figure A-29: Type plate of the ventilation unit

25 Appendix A16 Images of the test sample Figure A-30: Mounting options

26 Appendix B1 Data pertaining to the tested unit Specifications according to ventilation unit's type plate Manufacturer: SALDA Type: AHU Smarty 2X P 1.1 Address of the company: - Voltage: 230 V / 50 Hz ~1 Current consumption: Total Power consumption: 0.85 A 0.10 kw Serial number: Gu / Product number: Year of production: 2016 Weight: - Dimensions of the ventilation unit Test laboratory indications Height Width Depth 1010 mm 590 mm 250 mm

27 Appendix B2 Data pertaining to the tested unit Filter Type Quantity Filter class Dimensions Outdoor air filter: 1 F7 185 mm x 168 mm x 25 mm Extract air filter: 1 G4 185 mm x 168 mm x 25 mm Fans Exhaust fan Quantity: 1 Design: radial Manufacturer: Soler & Palau Type: CRBB/3-133/060 E11 BP16 Voltage/Frequency: 230 V 50/60 Hz Current consumption: 0.40 A Real power consumption: 0.05 kw Speed: / min Supply fan Quantity: 1 Design: radial Manufacturer: Soler & Palau Type: CRBB/3-133/060 E11 BP16 Voltage/Frequency: 230 V 50/60 Hz Current consumption: 0.40 A Real power consumption: 0.05 kw Speed: / min

28 Appendix B3 Data pertaining to the tested unit Heat exchanger Quantity: 1 Design: cross counter flow Material: PET Manufacturer: recutech Type: REP H-32 Serial No.: Humidityrecovery: No Dimensions: Width 170 mm Length mm L2 L1 Length 2 Depth 250 mm 360 mm Width Plate spacing 5.8 mm Air connections Extract air: DN 160 Exhaust air: DN 160 Outdoor air: DN 160 Supply air: DN 160

29 Appendix C Results of the tightness test The leakage related to the maximum declared air volume flow of 203 m³/h is: Measurement P stat external leakage leakage volume flow leakage internal leakage leakage volume flow leakage Nr. [Pa] [m³/h] % [m³/h] % leakage voluem flow [m³/h] 12,0 10,0 8,0 6,0 4,0 2% 2,0 0,0-2,0-4,0-6,0-8,0-10,0-12,0 testpressure [Pa] % external leakage internal leakage

30 Appendix D1 Pressure-airflow curves (extract air) ρ = 1.2 kg/m³ stat. pressure [Pa] x qvd qvd 100 qvmin air volume flow [m³/h]

31 Appendix D2 Pressure-airflow curves (supply air) ρ = 1,2 kg/m³ stat. pressure [Pa] x qvd qvd 100 qvmin air volume flow [m³/h]

32 Appendix E1 Measurements from the ventilation test q vmin with the parameter: 31.0 % at the supply fan and 28.0 % at the exhaust fan p stat. SU-OU p stat. EXT-EXH P el spec. el. power input [W/(m³/h)] 3 ρ = 1,2 kg/m³ supply ρ = 1,2 kg/m³ extract ρ = 1,2 kg/m³ ρ = 1,2 kg/m³ [Pa] [m³/h] [Pa] [m³/h] [W] [W] [W/(m³/h)] W/(m³/h)] ,7xq vd with the parameter: 58.5 % at the supply fan and 49.0 % at the exhaust fan p stat. SU-OU p stat. EXT-EXH P el spec. el. power input [W/(m³/h)] ρ = 1,2 kg/m³ supply ρ = 1,2 kg/m³ extract ρ = 1,2 kg/m³ ρ = 1,2 kg/m³ [Pa] [m³/h] [Pa] [m³/h] [W] [W] [W/(m³/h)] W/(m³/h)] The specific power input of the ventilation unit was related to the supply air flow. p el = power input of the unit / supply air flow

33 Appendix E2 Measurements from the ventilation test q vd with the parameter: % at the supply fan and 73.0 % at the exhaust fan p stat. SU-OU p stat. EXT-EXH P el spec. el. power input [W/(m³/h)] 3 ρ = 1,2 kg/m³ supply ρ = 1,2 kg/m³ extract ρ = 1,2 kg/m³ ρ = 1,2 kg/m³ [Pa] [m³/h] [Pa] [m³/h] [W] [W] [W/(m³/h)] W/(m³/h)] The specific power input of the ventilation unit was related to the supply air flow. p el = power input of the unit / supply air flow

34 Appendix F Thermodynamic test points ρ = 1.2 kg/m³ Supply air Extract air P el stat. pressure [Pa] test point at 0.7 x q vd test point at q vd power input [W] 100 test point at q vmin air volume flow [m³/h]

35 Appendix G1 Measurements and calculated values from the thermodynamic test Calculation based on DIN EN Heatexchanger w ith humidity transfer no A7 measured values q Vmin q Vn q Vd temperature extract Θ 11 C temperature exhaust Θ 12 C temperature outdoor Θ 21 C temperature supply Θ 22 C rel. humidity extract ϕ 11 % rel. humidity exhaust ϕ 12 % rel. humidity outdoor ϕ 21 % rel. humidity supply ϕ 22 % abs. humidity extract x 11 g/kg abs. humidity exhaust x 12 g/kg abs. humidity outdoor x 21 g/kg abs. humidity supply x 22 g/kg wetbulb temperature extract Θw 11 C wetbulb temperature outdoor Θw 21 C volume flow extract q V11 m³/h volume flow exhaust q V12 m³/h volume flow outdoor q V21 m³/h volume flow supply q V22 m³/h mass flow extract q m11 kg/s mass flow exhaust q m12 kg/s mass flow outdoor q m21 kg/s mass flow supply q m22 kg/s pressure extract / exhaust p tu1 Pa pressure outdoor / supply p tu2 Pa ambient temperature Θ amb C ambient pressure p amb Pa 96,014 96,045 96,050 power input total P E W result q Vmin q Vn q Vd mass flow ratio m SU/ m EXT q m22/ temperature ratio (supply) η ΘSU % humidity ratio (supply) η xsu % temperature ratio (exhaust) η ΘEX % humidity ratio (exhaust) η xex % spec. electr. Power input related to (qv22) P E /q V22 W/(m³/h) The calculation is based on following constants: c p,l [kj/(kgk)] c p,d [kj/(kgk)] r 0 [kj/kg] c p,w [kj/(kgk)]

36 Appendix G2 Measurements and calculated values from the thermodynamic test Calculation based on DIN EN Heatexchanger w ith humidity transfer no A2 measured values q Vmin q Vn q Vd temperature extract Θ 11 C temperature exhaust Θ 12 C temperature outdoor Θ 21 C temperature supply Θ 22 C rel. humidity extract ϕ 11 % rel. humidity exhaust ϕ 12 % rel. humidity outdoor ϕ 21 % rel. humidity supply ϕ 22 % abs. humidity extract x 11 g/kg abs. humidity exhaust x 12 g/kg abs. humidity outdoor x 21 g/kg abs. humidity supply x 22 g/kg wetbulb temperature extract Θw 11 C wetbulb temperature outdoor Θw 21 C volume flow extract q V11 m³/h volume flow exhaust q V12 m³/h volume flow outdoor q V21 m³/h volume flow supply q V22 m³/h mass flow extract q m11 kg/s mass flow exhaust q m12 kg/s mass flow outdoor q m21 kg/s mass flow supply q m22 kg/s pressure extract / exhaust p tu1 Pa pressure outdoor / supply p tu2 Pa ambient temperature Θ amb C ambient pressure p amb Pa 95,534 95,580 95,560 power input total P E W result q Vmin q Vn q Vd mass flow ratio m SU/ m EXT q m22/ temperature ratio (supply) η ΘSU % humidity ratio (supply) η xsu % temperature ratio (exhaust) η ΘEX % humidity ratio (exhaust) η xex % spec. electr. Power input related to (qv22) P E /q V22 W/(m³/h) The calculation is based on following constants: c p,l [kj/(kgk)] c p,d [kj/(kgk)] r 0 [kj/kg] c p,w [kj/(kgk)]

37 Appendix H Description of the frost protection climate strategy The unit was equipped with an electrical preheater situated on the suction side of the outdoor fan. To regulate the frost protection of the air ventilation unit the activation temperature of the frost protection (AF_SET), the temperature difference to deactivate the frost protection (AF_DEACTIVATION_DIFF) as well the activation time of the frost protection (CHANGING_TIME) have to be specified in the controller of the unit. The controller is comparing the activation Temperature (AF_SET) to the current outside air temperature inside of the ventilation unit (T_Fresh). If the current temperature (T_Fresh) is on a lower level than the setting of the activation temperature on the outdoor air side (AF_SET) the controller activate the frost protection of the unit. After the activation interval (CHANGING_TIME) has been expired the controller is calculating the difference between the temperatures (T_Fresh) and (AF_SET). If the difference between the temperatures (T_Fresh) and (AF_SET) is greater than the value set under (AF_DEACTIVATION_DIFF) the frost protection will be deactivated. As long the temperature difference is equal or lower the frost protection remains activated and the calculation and evaluation of the difference between the temperatures (T_Fresh) and (AF_SET) will be repeated after the activation interval (CHANGING_TIME) has been expired During the tests the following values were set in the controller of the unit. Variables: AF_SET Heat exchanger s anti-frost Set Point -6.5 C AF_DEACTIVATION_DIFF difference of anti-frost de activation temperature from activation temperature 15 K T_fresh Outdoor air temperature (preheated) current CHANGING_TIME- activating time 30 min

38 Appendix I Diagram of the cold climate test with electrical preheater

39 Appendix J Results of the acoustic tests Environmental conditions: rel. humidity: 48 % barometric pressure: 980 hpa air temperature: 23 C voltage: 230 V centre frequency [Hz] sound power level [db] exhaust outdoor air extract supply unit L W L WA static pressure [Pa] (OU/SU) / (EXT/EXH) 48 / / / / / 53 air volume flow [m³/h] OU SU EXH EXT with L W L WA sound power level A-weighted sound power level Sound power levels written bold indicate a difference between background noise and noise of source under test below 6 db. The accuracy of those results is reduced. The stated value is the upper bound for the sound power level.