Calculation of external available Pressure. [m/s] 0,41 0,62 0,82 1,03 1,23 1,44 1,64 1,85 2,05 2,47 2,88 3,29 3,7

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Vivien Lloyd
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1 Calculation of external available Pressure Page 1 Size: 1 Air flow volume [m³/h] Criterion flow velocity (Ref. 2 C) Do not design units in conditions acc. to white areas! Supply Unit with air conditioning elements: 1. Step Flow velocity related to Cross section of filter (long) Flow velocity related to Finned surface of heater Flow velocity related to Finned surface of cooler [m/s],41,62,82 1,3 1,23 1,44 1,64 1,85 2,5 2,47 2,88 3,29 3,7 [m/s],7 1,1 1,4 1,8 2,1 2,5 2,8 3,2 3,5 4,2 4,9 [m/s],8 1,2 1,5 1,9 2,3 2,7 3,1 3,5 3,9 4,7 Extract Unit without air conditioning elements: Flow velocity related to Inner cross section of unit [m/s],41,62,82 1,3 1,23 1,44 1,64 1,85 2,5 2,47 2,88 3,29 3,7 Calculation of external available statical air pressure by deduction of internal pressure losses Deduct the respective pressure losses of needed elements from available stat. pressure of fan! Available statical pressure [Pa] at rated voltage 2. Pressure Calculation without consideration of pressure regain! VN VN Ventilator Unit VN VN The following air conditioning elements reduce pressure available! Pressure loss [Pa] at above stated air volume Pocket filter F5 Calculated resistance Short filter (195 mm pocket) Clean resistance Recommended final resistance: 2-3 Pa To ensure long filter life time please dimension the unit with consideration of Calculated resistance Pocket filter F5 Long filter (6 mm pocket) Calculated resistance Clean resistance not to be used in size 1 Pocket filter F7 Calculated resistance Long filter (6 mm pocket) Clean resistance only to be used together with activated carbon filter Pocket filter F9 Long filter (6 mm pocket) Calculated resistance Clean resistance not to be used in size 1 Air Heater LW LW Medium: PWW (pump circulated hot water) LW Step LW Subtotal External statical pressure [Pa] available 14

2 Calculation of external available Pressure Page 2 Size: 1 Air Flow Volume [m³/h] Pressure calculation The following air conditioning elements reduce pressure available! Subtotal of page before of external available statical pressure [Pa] Pressure loss [Pa] at above stated air volume Air Cooler LK and LKV LK Medium: chilled water KKW LK LK Calculation of external available statical air pressure by deduction of internal pressure losses Deduct the respective pressure losses of needed elements from available stat. pressure of fan! Air Cooler LKR LKR Direct Evaporating LKR Medium: R47C, 5 C LKR Water Eliminator horizontal air flow (LK) Damper class type A Pressure losses to be taken into consideration only with damper on inlet side. Air Mixer class type A LJ, LM, CLM Pressure losses to be taken into consideration only with air mixer on inlet side. Plate heat Exchange APD with integrated Bypass resistance calculated at 22 C/3% r. H. on request Coarse Filter GF clean resistance Regularly cleaning required! Activated Carbon Filter AKCF Calculated resistance same than clean resistance Electric Air Heater LE LE 6, Step Operating voltage 4V/5Hz LE 13, LE 19, Total External statical pressure [Pa] available 15

3 Size 1 Ventilator Unit VN 11 Power Supply: 23V/1N~ 5 Hz with Pressure / Air Volume Performance, Selection of Speed Controllers FISCHBACH COMPACT FAN D54/E25 Discharge Inlet M M8 Static Pressure Regain [Pa] Static Pressure [Pa] V 19 V 17 V 15 V 125 V 1 V 8 V B Volumenstrom Air flow volume [m³/h] The data for external static pressure take into account all pressure losses due to integration of the fan within unit. Performance based upon free inlet and discharge. Max. power consumption,85 kw Max. current consumption 3,3 A I A / I N : 1,5 Static Pressure Regain B can be read from the performance curve. It is available when the unit is fitted with a straight discharge duct, sized according too the standard connection size B. Minimum duct length neccessary: 1,2 m Voltage [V] At free air [m³/h] and [A] External static pressure pst [Pa] available for AHU and system pressure losses line: Air Flow Volume V L [m³/h] bei ρ = 1,2 kg/m³ 2. line: Current consumption [Pa] ,54 1,49 1,42 1, ,95 1,84 1,73 1,62 1, ,41 2,28 2,14 1,98 1,8 1,61 1, ,7 2,58 2,44 2,29 2,1 1,86 1, ,91 2,77 2,62 2,45 2,26 2,3 1,76 1, ,4 2,77 2,61 2,42 2,19 1,89 1, ,24 2,84 2,67 2,47 2,22 1,95 Save power and even more silent with FISCHBACH SPEED CONTROLLERS Average Discharge-Air-Velocity v [m/s] related to standard connection size B Max. permissable Air Inlet Temperature: 6 C 16 Voltage Control Type Order-No. Stepless - 1% and 1% - * FDR Stepwise, 7 Steps * FDR FISCHBACH-AUTOMATIC-CONTROL * FRA * with integrated motor protection and outlet fuses

4 Size 1 Ventilator Unit VN 12 Power Supply: 23V/1N~ 5 Hz with Pressure / Air Volume Performance, Selection of Speed Controllers FISCHBACH COMPACT FAN D64/E35 33 Discharge 15 Inlet M M8 Static Pressure Regain [Pa] Static Pressure [Pa] V 23 V 19 V 17 V Volumenstrom Air flow volume [m³/h] Average Discharge-Air-Velocity v [m/s] related to standard connection size B 15 V 125 V 1 V B The data for external static pressure take into account all pressure losses due to integration of the fan within unit. Performance based upon free inlet and discharge. Max. power consumption 1,1 kw Max. current consumption 4,4 A I A / I N : 1,7 Static Pressure Regain B can be read from the performance curve. It is available when the unit is fitted with a straight discharge duct, sized according too the standard connection size B. Minimum duct length neccessary: 1,2 m Voltage [V] At free air [m³/h] and [A] External static pressure pst [Pa] available for AHU and system pressure losses line: Air Flow Volume V L [m³/h] bei ρ = 1,2 kg/m³ 2. line: Current consumption [Pa] ,42 2,11 1, ,88 2,6 2,42 2,23 2, ,4 3,1 2,91 2,68 2,42 2,12 1, ,74 3,42 3,23 3,2 2,76 2,45 2, ,6 3,73 3,53 3,31 3,4 2,71 2, ,5 3,76 3,58 3,41 3,16 2,89 2,57 2, ,41 4,16 4,3 3,88 3,71 3,53 3,33 3,14 Save power and even more silent with FISCHBACH SPEED CONTROLLERS Voltage Control Type Order-No. Stepless - 1% and 1% - * FDR Stepwise, 7 Steps * FDR Max. permissable Air Inlet Temperature: 6 C 17 FISCHBACH-AUTOMATIC-CONTROL * FRA * with integrated motor protection and outlet fuses

5 Size 1 Ventilator Unit VN 13 Power Supply: 23V/1N~ 5 Hz with Pressure / Air Volume Performance, Selection of Speed Controllers FISCHBACH COMPACT FAN DS6-74/E35 Discharge Inlet M M V 19 V 17 V 15 V 125 V 1 V The data for external static pressure take into account all pressure losses due to integration of the fan within unit. Performance based upon free inlet and discharge. Max. power consumption 1,4 kw Max. current consumption 5,5 A I A / I N : 1,7 Static Pressure Regain B can be read from the performance curve. It is available when the unit is fitted with a straight discharge duct, sized according too the standard connection size B. Minimum duct length neccessary: 1,2 m Static Pressure Regain [Pa] Static Pressure [Pa] V B Volumenstrom Air flow volume [m³/h] Voltage [V] At free air [m³/h] and [A] External static pressure pst [Pa] available for AHU and system pressure losses line: Air Flow Volume V L [m³/h] bei ρ = 1,2 kg/m³ 2. line: Current consumption [Pa] ,7 2, ,25 2,98 2,65 2, ,91 3,62 3,28 3,6 2,82 2, ,15 3,87 3,56 3,38 3,18 2,93 2, ,8 4,9 3,87 3,62 3,32 2,9 2, ,7 4,31 2,53 3,85 3,59 3,28 2, ,44 4,61 4,42 4,21 3,98 3,7 Save power and even more silent with FISCHBACH SPEED CONTROLLERS Average Discharge-Air-Velocity v [m/s] related to standard connection size B Max. permissable Air Inlet Temperature: 6 C 18 Voltage Control Type Order-No. Stepless - 1% and 1% - * FDR Stepwise, 7 Steps * FDR FISCHBACH-AUTOMATIC-CONTROL * FRA * with integrated motor protection and outlet fuses

6 Size 1 Ventilator Unit VN 14 Power Supply: 23V/1N~ 5 Hz with Pressure / Air Volume Performance, Selection of Speed Controllers FISCHBACH COMPACT FAN DS6-74/E65 33 Discharge 15 Inlet M M V 19 V 17 V 15 V 125 V 1 V The data for external static pressure take into account all pressure losses due to integration of the fan within unit. Performance based upon free inlet and discharge. Max. power consumption 1,3 kw Max. current consumption 5,6 A I A / I N : 1,7 Static Pressure Regain B can be read from the performance curve. It is available when the unit is fitted with a straight discharge duct, sized according too the standard connection size B. Minimum duct length neccessary: 1,2 m Static Pressure Regain [Pa] Static Pressure [Pa] V B Volumenstrom Air flow volume [m³/h] Voltage [V] At free air [m³/h] and [A] External static pressure pst [Pa] available for AHU and system pressure losses line: Air Flow Volume V L [m³/h] bei ρ = 1,2 kg/m³ 2. line: Current consumption [Pa] ,59 2,59 2,59 2, ,23 3,9 2,94 2,85 2,74 2, , 3,81 3,6 3,49 3,36 3,2 2,99 2, ,58 4,4 4,18 4,6 3,92 3,74 3,49 3, ,95 4,76 4,54 4,41 4,27 4,1 3,88 3, ,23 5,3 4,8 4,67 4,53 4,36 4,15 3, ,6 5,4 5,18 5,6 4,93 4,77 4,59 4,42 Save power and even more silent with FISCHBACH SPEED CONTROLLERS Average Discharge-Air-Velocity v [m/s] related to standard connection size B Max. permissable Air Inlet Temperature: 6 C 19 Voltage Control Type Order-No. Stepless - 1% and 1% - * FDR Stepwise, 7 Steps * FDR FISCHBACH-AUTOMATIC-CONTROL * FRA * with integrated motor protection and outlet fuses

Size: 1, Module depth 6 mm The unit sides marked by arrow are open Air Heater Unit LW for medium pump circulated water PWW 35 3 25 air pressure loss LW3 pressure loss [Pa] 2 15 1 5 LW2 LW1 5 1 15 2

is dependant on air flow volume and the air temperature difference (between air on-coil and air off-coil, to be taken out of following diagrams) is as follows: Q h [kw] = V L /36 x (t LA - t LE ) x ρ

7 Size: 1, Module depth 6 mm The unit sides marked by arrow are open Air Heater Unit LW for medium pump circulated water PWW air pressure loss LW3 pressure loss [Pa] LW2 LW pressure loss [kpa] 2 18 water pressure loss LW 2 LW LW ,,5 1, 1,5 2, 2,5 3, water quantity [m3/h] The formula for calculation of heating performance [kw] of air heater is dependant on air flow volume and the air temperature difference (between air on-coil and air off-coil, to be taken out of following diagrams) is as follows: Q h [kw] = V L /36 x (t LA - t LE ) x ρ L x cp L Q h = heating performance [kw] V L = t LA = air temperature off-coil [ C] t LE = air temperature on-coil [ C] ρ L = specific weight of air = 1,2 [kg/m³] cp = specific heat capacity of air = 1, [kj/kg K] 2

8 Size: 1, Module depth 6 mm Air Heater Unit LW for medium pump circulated water Heating performance for water temperature on-/off-coil 55/45 C 35 air temperature off-coil [ C] air temperature off-coil [ C] air temperature off-coil [ C] air flow volume[m 3 /h] LW 1 LW air flow volume[m 3 /h] LW C - 1 C C - 1 C C - 1 C air temperature on-coil [ C] air temperature on-coil [ C] air temperature on-coil [ C] 21

9 Size: 1, Module depth 6 mm Air Heater Unit LW for medium pump circulated water Heating performance for water temperature on-/off-coil 7/5 C 4 air temperature off-coil [ C] air temperature off-coil [ C] air temperature off-coil [ C] LW 1 LW LW C - 1 C C - 1 C C - 1 C air temperature on-coil [ C] air temperature on-coil [ C] air temperature on-coil [ C] 22

10 Size: 1, Module depth 6 mm Air Heater Unit LW for medium pump circulated water Heating performance for water temperature on-/off-coil 8/6 C 5 45 air temperature off-coil [ C] air temperature off-coil [ C] air temperature off-coil [ C] LW L W 2 LW C - 1 C C - 1 C C - 1 C air temperature on-coil [ C] air temperature on-coil [ C] air temperature on-coil [ C] 23

Size: 1, Module depth 6 mm The unit sides marked by arrow are open!

calculated with the formula: V W [m³/h] = (Q h x 36)/( t W x c W x ρ W ) air temperature off-coil [ C] air temperature off-coil [ C] pressure loss [kpa] pressure loss

water = 1 [kg/m³] c W = specific heat capacity of water = 4,19 [kj/kg K] 3 25 air pressure loss 2 15 1 5 5 1 15 2 3 2 1 air flow volume[m³/h], 1, 2, 3, 4, 5, 6, 19 17 15

11 Size: 1, Module depth 6 mm The unit sides marked by arrow are open! LK LKV Air Cooler Units LK and LKV for cooling medium chilled water KKW Water temperature on-/off-coil 6/1 or 6/12, without glykol The required amount of water can be calculated with the formula: V W [m³/h] = (Q h x 36)/( t W x c W x ρ W ) air temperature off-coil [ C] air temperature off-coil [ C] pressure loss [kpa] pressure loss [Pa] Q h = cooling performance [KW] V W = quantity of water [m³/h] t W = water temperature difference [Kelvin] (4K at 6/1 C or 6K at 6/12 C) ρ W = specific weight of water = 1 [kg/m³] c W = specific heat capacity of water = 4,19 [kj/kg K] 3 25 air pressure loss air flow volume[m³/h], 1, 2, 3, 4, 5, 6, water pressure loss chilled water 6/1 C air on-coil: 32 C, 4%, r.f. LK 2 water quantity[m³/h] 24 LK 4 LK chilled water 6/12 C air on-coil: 32 C, 4%, r.f. LK 2 LK LK 6 LK 6 LK 4 LK 2 LK 2 LK 4 LK 6

size A 14 LJ LM pressure loss [Pa] 12 1 8 6 Damper size A: 512 x 512 mm inner size 4 2 1 2 3 Air Mixer Unit CLM for AHU with supply and extract air arranged

1 2 3 Note for units type LJ, LM and CLM: Pressure loss of Air Mixing Units is calculated on base free air.

12 Size: 1, Module depth 6 mm The unit sides marked by arrow are open! Air Mixer Unit LJ and LM for AHU with supply and extract air arranged on top of each other pressure loss of each air flow outside air with damper size A 14 LJ LM pressure loss [Pa] Damper size A: 512 x 512 mm inner size Air Mixer Unit CLM for AHU with supply and extract air arranged in row pressure loss of each air flow outside air with damper size A 14 supply air fresh air exhaust air extract air pressure loss [Pa] Note for units type LJ, LM and CLM: Pressure loss of Air Mixing Units is calculated on base free air. That means, for connected duct of same cross section no additional dynamical intake losses have to be considered. In case of pressure side connection with a ventilator unit the resulting pressure regain is bigger than the pressure loss. Therefore, no statical pressure loss needs to be considered. 25

13 6 Standard Series Size: 1, Module depth 6 mm Combinated Activated Carbon Filter Unit AKCF for elimination of dust and undesireable odours 6 pressure loss [Pa] equipped with: 1. Activated carbon filter with 9 filter cartridges (bayonet fixing) 2. Pocket filter, quality class F7 (EU7), length 6mm Total air resistance of combinated filter unit is a sum of pressure drops of the filter steps 1 and 2. Therefore, the pressure loss of filter EU7 has to be added separately 14 to below values for activated carbon filter (to be found in diagram for the respective filter module) air resistance of activated 12 carbon filter only operative range The unit sides marked by arrow are open! Coarse Filter Unit GF 35 equipped with: 3 Filter steps: 2 Metal mat work filter and 1 Fibre mat filter with an exchange frame (regularly cleaning required) 25 pressure loss [Pa] air resistance of filter unit operative range Dampers and Flexible Connections Damper type A : for total cross section unit 512 mm width (B) x 512 mm height (H) Flexible Connection: to be used for outlet- and inlet side type A : 512 mm width (B) x 512 mm height (H) for total cross section of unit. 26

14 Size: 1, Module depth 6 mm The unit sides marked by arrow are open! Electric Air Heater Unit LE for 4V/5Hz operating voltage Heating performance, pressure loss and air temperature on-/off-coil Type LE 6,6 (kw), 8 elements, current max. 9,5 A, 3 switching levels Type LE 13,1 (kw), 16 elements, current max. 19, A, 3 switching levels Type LE 19,7 (kw), 24 elements, current max. 28,4 A, 3 switching levels pressure loss [Pa] air temperature off-coil [ C] air temperature off-coil [ C] air temperature off-coil [ C] air pressure loss 1. type LE 6,6 2. type LE 13,1 3. type LE 19, Electric Heater type LE 6,6 Electric Heater type LE 13, Electric Heater type LE 19, C C - 1 C + 1 C C - 1 C + 1 C C - 1 C air temperature on-coil [ C] air temperature on-coil [ C] air temperature on-coil [ C]

15 Size: 1, Module depth 6 mm The unit sides marked by arrow are open! Air Filter Unit KFS with short pocket (195mm) Technical data and resistance: Air Filter Unit with: short pocket pressure loss [Pa] air resistance of filters filter class F5 (EU5) F5 195 mm pressure loss [Pa] air resistance of filters filter class F7 (EU7) F7 6 mm only to be used in connection with activated carbon filter unit! 28

16 Size: 1 Sound data for Ventilator Unit VN 11 - VN 13 VN 11 Fan: D 54/E 25 *sound pressure level L p in db (A) voltage [V] inlet discharge * related to room absorption of 8 db (25m² Sabine), at free air! measured in distance of 3 m inlet side: sound power level in Lw [db] at mid frequency in (Hz) (at free air!) L WA [db(a)] discharge side: sound power level in Lw [db] at mid frequency in (Hz) (at free air!) L WA [db(a)] voltage [Volt] total voltage [Volt] total VN 12 Fan: D 64/E 35 *sound pressure level L p in db (A) voltage [V] inlet discharge * related to room absorption of 8 db (25m² Sabine), at free air! measured in distance of 3 m inlet side: sound power level in Lw [db] at mid frequency in (Hz) (at free air!) L WA [db(a)] discharge side: sound power level in Lw [db] at mid frequency in (Hz) (at free air!) L WA [db(a)] voltage [Volt] total voltage [Volt] total VN 13 Fan: DS 6-74/E 35 *sound pressure level L p in db (A) voltage [V] inlet discharge * related to room absorption of 8 db (25m² Sabine), at free air! measured in distance of 3 m inlet side: sound power level in Lw [db] at mid frequency in (Hz) (at free air!) L WA [db(a)] discharge side: sound power level in Lw [db] at mid frequency in (Hz) (at free air!) L WA [db(a)] voltage [Volt] total voltage [Volt] total

17 Size: 1 Sound data for Ventilator Unit VN 14 VN 14 Fan: DS 6-74/E 65 *sound pressure level L p in db (A) voltage [V] inlet discharge * related to room absorption of 8 db (25m² Sabine), at free air! measured in distance of 3 m inlet side: sound power level in Lw [db] at mid frequency in (Hz) (at free air!) L WA [db(a)] discharge side: sound power level in Lw [db] at mid frequency in (Hz) (at free air!) L WA [db(a)] voltage [Volt] total voltage [Volt] total

Calculation of external available Pressure. 1. Criterion flow velocity (Ref. 20 C) Do not design units in conditions acc. to white areas!

Page 1 Standard Series Size: 3 Air flow volume Calculation of external available Pressure [m³/h] 3 4 5 55 6 65 7 75 8 9 1 11 12 1. Criterion flow velocity (Ref. 2 C) Do not design units in conditions acc.