CUMULUS CUMULUS. Key figures. Construction. Function Integrated chilled beams

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1 Integrated chilled beams Key figures Connections: 1x mm, 2x mm Airflow: 5-60 l/s Pressure range: 40 - Pa Size: 293 x 200 mm (WxH) Length: 1192 or 1792 mm Total effect: up to 1200W Cumulus is available in MagiCADs database. Cumulus is a powerful climate beam in a small format with high capacity and a wide operating range, developed to ensure maximum performance. Cumulus creates a good and energy efficient indoor climate through its displacement ventilation principle. Cumulus is mounted integrated into standard suspended ceilings or other types of ceilings. Cumulus has a wide range of applications and can be used both in the large rooms and cellular offices. Function Cumulus is a ceiling mounted oneway blowing chilled beam with cooling and ventilation, using the wall for supplying air in the occupied zone. Cumulus is designed to use the Coanda effect, to create a thin vertical airflow along the wall, which allows the fresh air to efficiently reach the occupied zone. By interacting with the thermal driving forces from heat sources, Cumulus creates an energy efficient indoor climate where fresh air is efficiently supplied to the people in the room, while heated and polluted air can rise and leave the room with the exhaust air. This creates the best possible indoor climate, but also requires less resources than a traditional mixing ventilation system. Construction Cumulus is a climate beam with a construction of galvanized steel sheet and a battery (for cooling or heating) in copper and aluminum. Cumulus can as a standard be connected with the air from both sides (dy), where one connection is provided with a cover. At high air volumes should both connections be used, to reduce the noise level. Cumulus induce the room air through a perforated surface on the bottom of the beam. The devices are preset at the factory for proper flow and pressure. Stratification of the air temperature in the room gives a higher difference between the supply air and exhaust air temperature, which means that a higher heat effect can be taken away with the same amount of air as for a mixing ventilation system. The result is simply a better thermal indoor climate. Examples placement of Cumulus in offices 1

2 Material Cumulus is classified as green in Byggvarubedömningen and fulfills corrosivity category C2. For full material specifications, download our building product declaration for Cumulus. Cumulus is as standard powder coated in RAL9003, a high surface finish and good impact and scratch resistance. Mounting Cumulus is designed for integrated mounting in suspended ceiling grid systems, but can also be folded into other types of ceilings or mounted freely suspended. See installation instructions. Cumulus is mounted with a distance of mm from the wall for best performance. Wall max 900 Adjustments Cumulus can be delivered preset for specific pressure/airflow. If necessary, assembled dampers or similar can be used to adjust the flow (of one or more chilled beams). Adjustments is subsequently made in place by plug or unplug nozzles. The water circuit is controlled by means of valves and actuators, which are connected to a room control, which can control one or more beams parallel. See separate documentation for room control and adjustment of water flow. Maintenance/cleaning Cumulus does not contain any moving parts and are easily cleaned with a damp cloth. Nozzles and battery are easily accessible after the bottom plate has been removed. Duct system is cleanable via the attracted air connection, which can be used unless both sides are connected. Coil fins are carefully cleaned with vacuum cleaners fitted with a soft brush attachment. Dust and dirt from the air can affect the product s performance and should be removed if necessary. The interval for cleaning depends on the environment in which the products are mounted and can typically vary from 2-6 years. Outlet (Supply air + room air) Induction of room air 2

3 Capacity and adjustment charts, Cumulus K-factor k=2,2 k=3,5 Differential pressure (Pa) 10 5 Cumulus 1200 Cumulus Sound Pressure Level, Lp db(a) Airflow (l/s) The figure refers to maximum flows, fully open. Cumulus can be delivered preset to specified pressure and flow. Capacity and adjustment charts, Cumulus-X (extra air) K-factor k=4,3 k=6,5 Differential pressure (Pa) 10 5 Cumulus-X 1200* Cumulus-X 1800* Sound Pressure Level, Lp db(a) Airflow (l/s) The figure refers to maximum flows, fully open. Cumulus can be delivered preset to specified pressure and flow. Over 35 l/s, sound values that you see above, are accounted for double connection. Cumulus-X (extra air) Cumulus is available with a nozzle configuration for extra high air flow, then we call Cumulus-X. Cumulus-X is available in two different lengths, 1192 and 1792 mm. At airflows over 35 l/s, we recommend that Cumulus is connected at both ends to reduce the noise level. The specified sound pressure level in the function chart is including room attenuation 4 db (A), corresponding to a exvivalent absorption area of 10m2 Sabine. Correction of sound pressure level (Lp) to the sound power level (Lw) in each octave band * Hz Natural attenuation in octave bands * Hz

4 Dimensions & connections (duct dimension Ø, pipe dimension 12 mm) Ø L Overview Chart total effect of Cumulus and Cumulus-X, 80 Pa Effect at T 10 (temp. room - temp. water) + T 8 air [W] Cumulus-X 1200 Cumulus 1200 Cumulus-X 1800 Cumulus ,0 10,0 20,0,0 40,0,0 60,0 70,0 Airflow [l/s] Dashed lines - At airflows over 32 l/s, we recommend that Cumulus is connected to both ends to reduce the noise level. 4

5 Connections (right, left, double) Cumulus can be adapted with air connection and pipe connections on the left or right side. At airflows over 35 l/s, we recommend thatcumulus is connected with air at both ends to reduce the noise level. The picture to the right shows a plan view of an office and how to detect the connections to Cumulus in relation to a room. Left Right The connections are defined by the direction of the air outlet on Cumulus. Example Connetion type LH-RH LH-RV Description Air right - pipe right Air right - pipe left Wall (top view) LV-RV LV-RH Air left - pipe left Air left - pipe right RV LV LH RH LD-RV Air double - pipe left LD-RH Air double - pipe right Control systems InventiAir are able to deliver complete control systems or individual components. R Oxy L=400 pipe DN12 / pipe DN12 (diffusion proof) Valves & connectivity package Control valve FVR-10 incl compression fittings DN12 Aerators valve (manual) Aerators valve NC incl push-fit DN12 Stop valve TA400 incl compression fittings DN12 Connection hose Oxy L=400 pipe DN12 / push-fit DN12 (diffusion proof) Actuator 24V NC - pulse modulating digital on/off control 24V 0-10V NC - modulating analogue control Transformer Sizes between 20-1 VA 24V, plug or fixed connection 5

6 Circuit boards (see separate documentation) Circuit boards for quick and easy connection of all the control functions in a control system. Connects the controller with peripheral control components in the control zone and forwards the electrical supply and control signals. Use of a circuit board also helps a lot for future changes to the subdivision and control zones. Connect Maxi Circuit board for power supply and communication with several types of external sensors such as; presence, CO2, humidity sensor, VAV and boosting damper. Room controller (see separate documentation) We have three different control units depending on the peripherals to be regulated and if there are demands for communication with superior systems via Modbus or BACnet. Contact InventiAir for help, finding the right equipment for your needs. Diwa B (room controller) Room controller for sequence control of heating and cooling or only heating or cooling without communication with the host system. Integrated function for connecting the condensation sensor. Diwa C (room controller) Diwa C is a programmable controller with communication via Modbus or BACnet, but which can also be used as a stand-alone control unit. Integrated function for connecting the condensation sensor. Connect Midi Circuit board with RJ45 cables and external sensors for humidity sensor, VAV and boosting damper. Connect Mini Circuit board with the basic function cooling and heating. MinMax 2-position damper (see separate documentation) Diwa CD (room controller) Diwa CD is a programmable controller with LCD display. Communication over Modbus or BACnet, but which can also be used as a stand-alone control unit. Ability to program most of the functions directly in the control unit without superior control system. May be beyond the capabilities of the C Diwa also be combined with analog CO2 sensor 0-10V. Integrated function for connecting the condensation sensor. Patented damper for basic flow/maximum flow that requires no silencer. Available with or without engine. By default it comes with 24V engine. 6

7 Power charts The power chart shows the cooling capacity of the water circuit at a given static nozzle pressure and the desired airflow in Cumulus. The effect on the water circuit is read on the left scale is Watts per Kelvin and shall be multiplied by the number of degrees of temperature difference, which consists of the temperature difference between the average temperature E of the water circuit and the calculated room temperature, including the estimated stratification. The effect applies to a nominal water flow of; l/s on the water circuit for the length 1200 and l/s for the length For a more precise calculation of cooling capacity, where the flow deviates from the nominal flow (use chart 5 on page 9). Power chart, Cumulus 1200 (chart 1) Effect water circuit (temp. room - temp. water) [W/ K] Nominal power at flow 0,025 l/s ,0 5,0 10,0 15,0 20,0 25,0,0 120 Pa Pa 80 Pa 60 Pa 40 Pa Airflow [l/s] Example: Calculate the nominal cooling power from Cumulus-1200 on the water circuit at a airflow of 15 l/s an a available nozzle pressure of Pa. KS =14 /17 and dimensioning temperature of the air in the room + stratification (thermal stratification) is 24 C + 1,5 C =25,5 C. The temperature difference ( T) is therefor 25,5 -( )/2 = 10 K Select the point on the X-axis of the air flow 15 l/s and follow the line up to the pressure curve of Pa, then read power on the Y-axis to 54W/ K x T10=540W. Nominal flow = 540W/(3 T x 4200)= 0,043 l/s. Use the flow correction factor in chart 5 on page 9, if the flow deviates from the nominal flow. To get the total effect including air cooling capacity, use chart 7 on page 10 and then add the effect of the supply air. Power chart, Cumulus 1800 (chart 2) Effect water circuit (temp. room - temp. water) [W/ K] Nominal power at flow 0,038 l/s ,0 5,0 10,0 15,0 20,0 25,0,0 35,0 40,0 45,0 120 Pa Pa 80 Pa 60 Pa 40 Pa Airflow [l/s] Dashed lines - At airflows over 32 l/s, we recommend that Cumulus is connected to both ends to reduce the noise level. 7

8 Power chart, Cumulus-X 1200 (extra air) (chart 3) 70 Effect water circuit (temp. room - temp. water) [W/ K] Nominal power at flow 0,025 l/s ,0 10,0 20,0,0 40,0,0 120 Pa Pa 80 Pa 60 Pa 40 Pa Airflow [l/s] Dashed lines - At airflows over 32 l/s, we recommend that Cumulus is connected to both ends to reduce the noise level. Power chart, Cumulus-X 1800 (extra air) (chart 4) 110 Effect water circuit (temp. room - temp. water) [W/ K] Nominal power at flow 0,038 l/s ,0 10,0 20,0,0 40,0,0 60,0 70,0 80,0 120 Pa Pa 80 Pa 60 Pa 40 Pa Airflow [l/s] Dashed lines - At airflows over 32 l/s, we recommend that Cumulus is connected to both ends to reduce the noise level. 8

9 Flow compensation (chart 5) Calculation of the flow compensation effect. All reported data on the effect diagram applies for a nominal flow where the power factor = 1. F To calculate a more accurate effect at differing flows, the power factor is calculated and then multiplied by the output data in the chart. This flow is 0,025 l/s for Cumulus 1200 and 0,038 l/s for Cumulus 1800, depending on the different dimensions of the constituent tubes in the cooling coil. 1,2 1,1 Example: What is the corrected power of Cumulus 1200 according to the example on chart 1 on page 7? Power factor 1,0 0,9 0,8 0,7 0,6 0,01 0,02 0,03 0,04 0,05 0, 0,07 0,08 0,09 0,1 Nominal power was 540W and the flow l/s. Read the power factor of the chart in the example = 1.04 The flow compensation effect of the water circuit on Cumulus 1200 = 540 x 1,04 = 562 W The new flow is 562W / (3 T x 4200) =0,045 l/s Water flow qw [l/s] Cumulus 1200 Cumulus 1800 Power factor of turbulence intensity in the cooling coil (single water circuit for cooling) Pressure chart Cumulus (chart 6) Pressure drop in water circuit. Pressure [kpa],0 25,0 20,0 15,0 10,0 5,0 0,0 0,01 0,02 0,03 0,04 0,05 0, 0,07 0,08 0,09 0,1 Example: Which pressure does a Cumulus 1200 with water temperature KS=14/17 ( T 3 ) at an effect on the water circuit = 562 W? The flow in the climate beam = 562W / (3 T x 4200) = 0,045 l/s Read the flow on the x-axis and follow the line of intersection of Cumulus Read the pressure drop on the y axis = 8 kpa Water flow [l/s] Cumulus 1200 Cumulus 1800 The pressure drop is calculated for a water temperature of 15 C 9

10 Cooling power, supply air Example: Which cooling power does the supply air give at an airflow of 15 l/s and a temperature difference between the supply air and the exhaust air at 8 K? Read 15 l/s on the x-axis and the intersection of 8 T, read the effect of the y-axis = 140W Cooling power [W] ,0 10,0 20,0,0 40,0,0 Airflow [l/s] Order (example) Product name Size Connction air Connection water Color Cumulus 1200 LV-RV 1200 left left RAL9003 Cumulus 1800 LD-RH 1800 double right RAL9003 Cumulus-X 1800 LV-RH 1800 left right RAL9003 To select the correct designation for connections, see page 5. 10