1s1 - Supply and Exhaust Grilles-oah, Oav, Oab, Cch, Ccv, Oas, Oak, Oan, Oam, Ocm[1]

1/S1

Grilles

Supply and Exhaust Grilles OAH, OAV, OAB, CCH, CCV, OAS, OAK, OAN, OAM, OCM

Linear Grilles OAB, OAV

Floor Grilles NRA, NRB, NRE, NRK

Clean and Comfort Air You Breath

Sanja Boljevic

Text Box

INDEX

2

Supply and Exhaust Grilles

Aluminium Grille, Type OAV

2

Opening size without installation subframeL2 x H2 = (L-10) x (H-10) mm

ApplicationSupply and exhaust air grilles, made of extrud-ed aluminium sections, anodised in its natural colour. The front blades are horizontal and indi-vidually adjustable. Fixing with visible screws, or concealed fastening with installation subframe and special lock. Volume control dampers and installation subframe are made of galvanised sheet steel.

ApplicationSupply and exhaust air grilles, made of extrud-ed aluminium sections, anodised in its natural colour. The front blades vertical and individu-ally adjustable. Fixing with visible screws, or concealed fastening with installation subframe and special lock. Vol-ume control dampers and installation subframes are made of galvanised sheet steel.

OAH 1

Supply and exhaust air grilles with one row of horizontal, individually adjustable blades

OAH 2

Supply air grilles with two rows of individually adjustable blades: the front line is horizontal.

OAH 1-L, OAH 2-L

Supply and exhaust air grilles such as OAH 1 and OAH 2 with opposed blade volume control damper type L. Damper blades are commonly adjustable.

OAH 1-VK, OAH 2-VKSupply and exhaust air grilles such as OAH 1 and OAH 2 with equal curved blade volume control damper type VK. Damper blades are commonly adjust-able.

OAH 1-K, OAH 2-KSupply and exhaust air grilles such as OAH 1 and OAH 2 with flap type volume control damper type K.

Ordering Key:

Without installation subframe: OAH 2 - L (L x H)

With installation subframe: OAH 2 - L + (L x H)

OAV 1

Supply and return air grilles with one row of vertical, individually adjustable blades.

OAV 2

Supply and return air grilles with two rows of individually adjustable blades; the front line is vertical.

OAV 1-L, OAV 2-L

Supply and exhaust air grilles such as OAV 1 and OAV 2 with opposed blade volume control damper type L. Damper blades are commonly adjustable.

OAV 1-VK, OAV 2-VK

Supply and exhaust air grilles such as OAV 1 and OAV 2 with equal curved blade action volume control damper type VK. Damper blades are commonly adjustable.

OAV1-K, OAV 2-KSupply and exhaust air grilles such as OAV 1 and OAV 2 with flap type volume control damper type K.

Ordering Key:

Without installation subframe: OAV 1-VK(L x H)

With installation subframe: OAV 1-VK+UR(L x H)


Aluminium Grille, Type OAH

Standard sizes

L x H [mm]

Free outletarea [cm2]

Standard sizes

L x H [mm]


Design Changes Reserved 3


3

Opening size (L-10) x (H-10)

ApplicationSupply and exhaust air grilles for round ventilation ducts and spiral-ducts. The frame is curved to fit to the duct radi-us. Installation with visible screws directly to the duct. The blades are individually adjustable. The installation sub-frame is made of sheet steel and blades of extruded alu-minium sections. The grille is powder coated in RAL 9010, or any other colour on request. Volume control damper is made of galvanised sheet steel or of pickled sheet steel and painted black on special request.

CCV 1, CCH 1Supply and exhaust air grilles with one row of

individually adjustable, vertical (CCV 1) or horizontal (CCH 1) blades.

CCV 2, CCH 2Supply and exhaust air

grilles with two row of individually adjustable blades; the front line is vertical (CCV 2) or horizontal (CCH 2).

CCV 1-L, CCV 2-L; CCH 1-L, CCH 2-LSupply and exhaust air grilles such as CCV 1, CCV 2, CCH 1 or CCH 2 with opposed

blade volume control damper type L. Damper blades are commonly adjustable.

CCV 1-K, CCV 2-K; CCH 1-K, CCH 2-KSupply and exhaust air grilles such as CCV 1, CCV 2, CCH 1 or CCH 2 with flap type volume control damper type K.

CCV 1-S, CCV 2-S; CCH 1-S, CCH 2-SSupply and exhaust air grilles such as CCV 1, CCV 2, CCH 1 or CCH 2 with volume control damper type S.

The effective outlet area is to be inserted when calculat-ing supply air volume. Selection diagrams and technical data are given at the end of the chapter.

Ordering Key:

CCV 2-L 425 x 125 RAL...

Installation Mode

Standard sizes

L x H [mm]


Grilles for Round Ventilation Ducts, Type CCV i CCH

4


Aluminium Grille, Type OASAluminium Grille, Type OAB

4


Application Supply and exhaust air grilles, made of extruded aluminium sections, anodised in its natural colour. Horizontal fixed blades are set at 0˚ or 15˚ def lection. Fixing with visible screws, or concealed fastening with instal-lation subframe and special locks. Volume control dampers and installation subframes are made of galvanised sheet steel. On special request, volume control dampers can be made of pickled sheet steel and painted black.

Application Non vision transfer air grilles with horizontal fixed inclined blades and border frame for screw fastening, made of extruded aluminium sections, anodised in its natural colour. The grilles are meant for installation in the opening in the door (usually without installation subframe), with a purpose to equalise the pressure between two rooms.

OAB 1-0, OAB 1-15Supply and exhaust air grilles with one

row of horizontal, fixed blades set at 0° or 15° deflec-tion.

OAB 2-0, OAB 2-15

Suply and exhaust air grilles such as OAB 1-0 and OAB 1-15 with built-in second row of individually adjustable blades.

OAB 1-0/L, OAB 2-15/L

Supply and exhaust air grilles such as OAB 1-0...OAB 2-15 with opposed blade action vol-ume control damper type L. Damper blades are commonly operated.

OAB 1-0/K, OAH2-15/K

Supply and exhaust air grilles such as OAB 1-0.... OAB 2-15 with flap type volume control damper type K.

The effective outlet area is to be inserted when calculating sup-ply air volume.

Ordering Key:

Without installation subframe: OAB 1-0/L (L x H)With installation subframe: OAB 1-0/L + UR (L x H)

OAS

Non vision transfer air grilles with horizontal fixed blades.

For calculation of air flow rate effective outlet cross-section area is to be inserted, which is about 8% lower than the cross-section area.

OAS - R (x)

Air grilles such as OAS with matching rear frame; door thickness (x) not defined or unknown, but within: x = 43 to 65 mm

OAS - R (s)

Air grilles such as OAS with matching rear frame; door thickness (s) defined, within: s = 38 to 66 mm

Ordering Key:

Door thickness unknown (x=43-65): OAS-R (L x H)Door thickness known e.g.: s=47 mm: OAS-R (47) (L x H)

OAB -0 OAB-15

Pressure drop: ∆p=ζ

Air pressure drop coefficient ζ=6,2

2ρv2

[Pa]

Calculation of air pressure drop:

OAS

OAS-R

Standard sizes

L x H [mm]


Standard sizes

L x H [mm]




Standard sizes

L x H [mm]


5

Aluminium Grille, Type OAK

OAK

Exhaust air grilles with fixed square-pattern plastic core.

OAK-L

Exhaust air grilles such as OAK with opposed blade vol-ume control damper, type L. Damper blades are commonly adjustable.

Ordering Key:

Without installation subframe: OAK (L x H)

With installation subframe: OAK + UR (L x H)

The effective outlet area is to be inserted when calculating supply air volume.

Aluminium Grille, Type OAN

Application Exhaust air grilles with horizontal, fixed inclined front blades and border frame for screw fasten-ing, made of extruded aluminium sections, anodised in its natural colour. Fixing only with visible screws, usually in the opening without installation subframe. Volume control dampers are made of galvanised sheet steel, or, on special request, of pickled sheet steel and painted black.

OAN

Exhaust air grilles with horizontal, fixed inclined front blades.

OAN-L

Exhaust air grilles such as OAN with opposed blade vol-ume control damp-

er, type L. Damper blades are commonly adjustable.

Ordering Key:

Without installation subframe: OAN - (L x H)

With installation subframe: OAN - L + UR (L x H)


Application Exhaust air grilles with fixed square-pattern plastic core, painted grey with frame made of extruded aluminium sections, anodised in its natural colour.Fixing with visible screws, or concealed fas-tening with installation subframe and special locks. Volume control dampers and instal-lation subframes are mmade of galvanised sheet steel. On special request, volume control dampers can be made of pickled sheet steel and painted black.


Standard sizes

L x H [mm]


6

Linear Grilles

Aluminium Linear Grille, Type OABAluminium Linear Grille, Type OAV

6

Opening size with installation subframeL x H = 2K + (n x s) + 25 x H

Opening size without installation subframeL2 x H2 = 2K + (n x s) +15 x (H-10)

Application Supply and exhaust air grilles, made of extruded alu-minium sections, anodised in its natural colour. The front blades are vertical, all blades are individually adjustable. Fixing with visible screws, or concealed fastening with installation subframe and locks. Volume control dampers and installation subframes are made of galvanised sheet steel. For width more than 2000 mm, the linear grilles are supplied in sections. On special request, volume control dampers can be made of pickled sheet steel and painted black.

The effective outlet area is to be inserted when cal-culating supply air volume.

Opening size with installation subframeL1 = L - 25H1 = H - 25Opening size without installation subframeL1 = L2 - 15H1 = H2 - 15

Application Supply and exhaust air linear grilles, made of extruded alu-minium sections, anodised in its natural colour. Horizontal fixed profiled blades are set at 0˚ or 15˚ def lection. Fixing with visible screws, or concealed fastening with installation subframe and locks. Volume control dampers and instal-lation subframe are made of galvanised sheet steel. For width more than 2000 mm, the linear grilles are supplied in sections. On special request, volume control dampers can be made of pickled sheet steel and painted black.

Ordering Key:Without installation subframe: OAB 2 - 15/VK (L x H)With installation subframe: OAB 2 - 15/VK + UR (L x H)

If the total length L of the serial built-up of linear grilles is: L ≤ 2000 mm, the grille is made of one section,2000 < L ≤ 4000 mm, the linear grille is made of two sections, L > 4000 mm, the linear grille is made of a number of sec-tions, and the lengths of sections "K" and "S" must meet the condi-tions stated: K-10 n = number of "s" sections

20 20= integer; S = integer;

OAV 1Supply and exhaust air grilles with one row of vertical, indi-vidually adjustableblades.

OAB 2-0, OAB 2-15Supply and exhaust air linear grilles such as OAB 1-0 and

OAB 1-15, with the built - in sec-ond row of indi-vidually adjust-able blades.

OAB 1-0, OAB 1-15Supply and exhaust air linear grilles with one

row of horizontal, fixed blades set at either 0˚ or 15˚ def lection.

Ordering Key:Without installation subframe: OAV 1 (L x H)With installation subframe: OAV 1 + UR (L x H)

OAV 1-LSupply and exhaust air grilles such as OAV 1 with opposed blade action volume control damper type L.Damper blades are commonly operated.

The effective outlet area is to be inserted when calcu-lating supply air volume.

OAV

OAB

Free outletarea

[cm2/m]

Standardheights H [mm]


Standardheights H [mm]


Floor Grilles

7

Aluminium Grille, Type OAM; Steel Grille, Type OCM

The effective outlet area is to be inserted when calculat-ing supply air volume.

Free outlet area section amounts to app. 50 % of the sec-tion L1 x H1 area.

Application Exhaust air grilles made of aluminium (type OAM) or steel (type OCM) sections placed on the front side with an expand-ed aluminium / steel mesh screen. Fixing with visible screws, with or without an installation sub-frame. Opening size is the same for both types. Volume control dampers are made of galvanised sheet steel, or, on special request, of pickled sheet steel and painted black.

OAM, OCM

Exhaust air grilles with an expandedmesh screen.

OAM - L, OCM - L

Exhaust air grilles such as OAM / OCM with opposed blade action volume con-trol damper type L. Damper blades are commonly operated.

OAM - K, OCM - K

Return air grilles such as OAM / OCM with flap type volume control damper type K.

Ordering Key:

Without installation subframe: OCM (L x H)

With installation subframe: OCM + UR (L x H)

Pressure drop: ∆p=ζ Pressure drop coefficient ζ = 5.5

2ρv2

[Pa] L1 = L - 25H1 = H - 25

NRA 1-0, NRA 1-15

Supply and exhaust air grille with one line of fixed blades set at 0˚ or 15˚ def lection.

NRA 2-0, NRA 2-15

Supply and exhaust air grilles such as NRA 1-0 and NRA 1-15 with built-in second line of individually adjustable blades.

NRA 1-0/L, NRA 2-15/L

Supply and exhaust air grilles such as NRA 1-0 … NRA 2-15 with opposed blade action volume control damper type L. Damper blades are commonly operated.

Aluminium Floor Grille, Type NRA

Application Supply and exhaust air grilles for f loor and/or wall mount-ing, made of extruded aluminium sections, anodised in its natural colour. Horizontal fixed profiled blades are set at 0˚ or 15˚ def lection. Volume control dampers are made of gal-vanised sheet steel, or, on special request, of pickled sheet steel and painted black. Grille core is freely removable from the installation subframe (mark S) or after releasing special locks (mark E) . By wall installation (seepage 11), the grille can be fixed only with special locks (mark E). Installation possible as linear grilles.


Opening size without installation subframeL2 x H2 = (L-10) x (H-10) mm‑

H1/L1 H/L

40

40

4053

53

53

NRA-15

Standardsizes

L x H [mm]

Standardsizes

L x H [mm]


Installation type: - freely removable: S - with special locks: EStandard size: L x HDamper typeBlade deflectionNumber of blade rows

8

Floor Grilles

Aluminium Floor Grille, Type NRB

8

NRB 1

Supply and exhaust air grille with one row of fixed blades.

NRB 2

Supply and exhaust air grilles such as NRB 1 with built-in second line of individually adjustable blades.


Aluminium Floor Grille, Type NRE

Application Supply and exhaust air grille cores for double-floor mount-ing, are made of extruded aluminium sections, anodised in its natural colour. Horizontal fixed profiled blades are lev-elled with floor plates. Volume control dampers are made of galvanised or black-painted sheet steel.

The effective outlet area is to be inserted when calcu-lating supply air volume.

NRE

Air grilles for f loor mounting with horizontal fixed blades.

NRE-L

Air grilles such as NRE with opposed blade action volume control damper type L. Damper blades are commonlyadjustable.

Application Supply and exhaust air grilles in a special rigid construction for floor mounting in sport halls, gyms or swim-ming pools, made of extruded aluminium

sections, anodised in its natural colour. Due to their strong construction these grilles have higher loading capacity than NRA type grilles. Volume control dampers are made of galvanised sheet steel, or, on special request, of pickled sheet steel and painted black. Serial installation as linear grilles is possible. Grille core is freely removable from the installation subframe (mark S) or after releasing special locks (mark E) . By wall installation (see page 18), the grille can be fixed only by special locks (mark E).

NRB 1-L, NRB 2-L

Supply and exhaust air grilles such as NRB 1 and NRB 2 with opposed blade action volume control damper type L. Damper blades are com-monly adjustable.

Standardsizes

L x H [mm]


Ordering Key:

Installation type: - freely removable: S - with special locks: E

Standard size: L x H

Number of blade lines

Standardsizes

L x H [mm]


Ordering Key:

Standard sizeFloor thicknessInstallation type (U1 or U2)Damper type

Additional mark for equal angle beams, if required (see page 12)


Floor Grilles

9

Aluminium Floor Grille, Type NRK

Application Supply roll-up air grilles for floor convector and the other floor openings, are made of extruded aluminium sections, anodised in its natural colours.The maximal length of roll-up grille in one piece is Lmax = 5000 mm and width is Hmax = 400 mm. Standard version is without frame. Version with frame is on request.

Ordering Key:

NRK 1000 x 400

Standard size H = 400 L = 1000 Grill Type

ROLL-UP GRILL

10

Grilles - Installation Instructions

10

Ceiling, Wall and External Grilles Installation Instructions

Installation procedure for grilles installation subframe:1. Prior to placing the grille in the opening, lockclip is to be moved fully back with a screwdriver by turning the bolt to the left.2. Place the grille.3. Fix the grille lightly by turning the bolt to the right.4. Grille is to be levelled.5. Fix the grille firmly to the subframe by additional turning the bolt to the right.

Installation of grilles with installation subframes and special locks for grille types: OAH, OAV, OAB, OAK

Installation of grilles with visible screws (in the opening with or without installation subframe) for grille types: OAH, OAV, OAB, OAK, OAN, OAM, OCM, OAS, CCV, CCH.

metal sheetwood

wall

metal sheet wood wall



11

Floor Grilles, Types NRA and NRB / Installation Instructions

The grille core is laid loose and can be easily removed. Volume control damper (if ordered) is fixed with the grill subframe. In order to control air volume, i.e., prior to adjusting the damper setting, the grille core must be removed.

The grille core is fixed by special locks. Be-fore the grille core is inserted, the locks must be placed to the centre. Then move the locks towards the grille edge and turn them into the position shown in the figure by using stick Ø 3 mm.

The grille core is fixed by special locks. The fixing procedure is the same as mentioned above for floor installation.

Floor installation; loose grilleTypes NRA - 0, NRA - 15 and NRB

L1 = L - 20 H1 = H - 26L3 = L + 32 H3 = H + 26

Floor installation; fixed / tight grilleTypes NRA - 0, NRA - 15 i NRB

L1 = L - 20 H1 = H - 26L3 = L + 32 H3 = H + 26

Wall installation; fixed / tight grilleTypes NRA - 0, NRA - 15 i NRB

L1 = L - 20 H1 = H - 26L3 = L + 32 H3 = H + 26

12


12

Floor Grilles Type NRE / Installation Instructions

Depending on the f loor construction and its thickness, there are two possibilities for NRE type grille installation:

Installation type U1

Dimensions of the 30 mm thick f loor plate are equal to the grille length. The f loor plates are supported by special sectional grid. The opening, wide H1 = H + 1 (mm), has to be cut out of the f loor plate (along the whole length). The grille is than placed on the same section as the f loor plate.

Installation type U2

Dimensions of the 30 mm (and 40 mm optionaly) thick f loor plates are not equal to the grille dimensions. Floor plates lay on special vertical fixing anchors. An opening with dimensions: L1 x H1 = (B + 1) x (H + 1) has to be cut out of f loor plate. On the rear side of the f loor plate the galvanised equalizing steel beam L 30 x 30 is fastened by screws. The grille is then placed on these sections.

Floor plate

Floor plate

Floor plate

Section A-A(zoomed in)

Section B-B(zoomed in)

Section C-C(zoomed in)

Compensation lattice


Grilles - Selection Charts

13

Example 3:

Given: Throw: L=9 m Supply air volume: V=800 m3/hmCore velocity: vL=0,75 m/sTemperature difference: ∆tz= 6 K Distance from the ceiling: h=0,8 mGrille type: OAV-L (linear)

Select:

Diag. 1: Grille size: H = 125 mm Eff. jet velocity: vef = 3 m/sDiag. 3: Induction: i ≅ 5Tab. 2: Eff. outlet area: Aef = 0,075 m2/mDiag. 4.1: Pressure drop (50 % setting): ∆ptot = 18 PaDiag. 4.3: Sound power level (50 % setting): 35 dB (A)Tab. 4.4: Correction: 35-1=34 dB (A)Diag. 5: Distance b02 = 1,26 m Temp. differ.: ∆tL = 1,3 KDiag. 6: Air-stream drop: y = ∆tz/k = 5,4 m k=1,1 Horizontal grille spacing: D ≥ 0,2 L ≥ 1,8 m

Example 1:

Given: Throw: L=8 m Supply air volume: V=1000 m3/hCore velocity: vL=0.5 m/sTemperature difference: ∆tz= 4 K Distance from the ceiling: h=0.9 mGrille type: OAV

Select:

Diag. 1: Grille size: L x H 625 x 325 Eff. jet velocity vef = 2 m/sDiag. 3: Induction: i=8Tab. 2: Eff. outlet area: Aef = 0.131 m2

Diag. 4.1: Pressure drop (50 % setting): ∆ptot = 8 PaDiag. 4.3: Sound power level (50 % setting): 24 dB (A)Tab. 4.4: Correction: 24+1=25 dB (A)Diag. 5: Distance: b02=0.9 m Temp. differ.: ∆tL = 0.75 KDiag. 6: Air-stream drop: y=∆tz/k=3.3 m k=1.2 Horizontal grille spacing: D>0.2 L> 1.6 m

Example 2:

Given: Throw: L=8 m Supply air volume: V=1000 m3/hCore velocity: vL=0.5 m/sTemperature difference: ∆tz= 4 K Distance from the ceiling: h=0.9 mGrille type: OAB

Select:

Diag. 1: Grille size: L x H 825 x 325 Eff. jet velocity: vef = 2 m/sDiag. 3: Induction: i=8Tab. 2: Eff. outlet area: Aef = 0.129 m2

Diag. 4.1: Pressure drop (50 % setting): ∆ptot = 8 PaDiag. 4.3: Sound power level (50 % setting): 24 dB (A)Tab. 4.4: Correction: 24+0=24 dB (A)Diag. 5: Distance b02=0.9 m Temp. differ.: ∆tL = 0.75 KDiag. 6: Air-stream drop: y=∆tz/k=3.3 m k=1.2 Horizontal grille spacing: D ≥ 0.2 L ≥ 1.6 m

Example 4:

Given: Supply air volume: V=2000 m3/hGrille type: OAB 1-0/L (625 x 425)

Select:

Tab. 2: Effective exhaust area: Aef = 0.095m2

Diag. 1: Effective exhaust velocity: vef = 5.7 m/sDiag. 3.1: Pressure drop (100 % open) ∆ptot = 12 PaDiag. 3.3: Sound power level (100 % open) = 37dB (A)

14


14

Discharge Diagram

V [m3/h] Supply air volume ratevef [m/s] Effective jet velocityAef [m2/m] Effective outlet areah [m] Distance from the ceiling D [m] Horizontal grille spacingL [m] Air throwvL [m/s] Maximum air core velocity at distance L (avg. velocity ≅ 0.3 vL)

i Induction

=

Air volume in motion Supply air volume ∆tz [K] Temperature difference between supply air temperature tz and room temperature tp∆tL [K] Max. temperature difference between the core temperature tL and room temperature tpb0.2 [m] Distance from the centre of the air-stream (if h>0.8 m) or from the ceiling (if h<0.3 m) to the point where the velocity is still 0.2 m/sy [m] Air-stream drop to riseβ [˚] Blade angleα [˚] Angle of air-stream

Free f low (without coanda effect) Flow with coanda effect

forfor

Description:



15

5. Centre distance b02(valid for h ≥ 0.8 m)

Throw

heating

cooling

Maximum temperature difference between the core temperature tL and room temperature tP

∆tL = k1 x ∆tL [K]

k1 = 0.9 for h ≤ 0.3 mk1 = 0.75 for h ≥ 0.8 m

vL

vef

Effective outlet area Aef [m2]

6. Air stream Drop or Rise Diagram due to ∆tz

7. Table of Correction Factors (for divergently set blades)

Blade angle β° 45 90

Angle of air-stream α° 35 60

Maximum core velocity vL 0.7 . vL 0.5 . vL

Max. temperature difference ∆tL 0.7 . ∆tL 0.5 . ∆tL

Induction i 1.4 . i 2.0 . i

Horizontal grille spacing in case a

D ≥0.25 . L ≥0.3 . L

Horizontal grille spacing in case b

D ≥0.2 . L ≥0.3 . L

Air-stream drop to rise y 1.4 . y 2.0 . y

Dis

tanc

e

16


16

1. Selection Diagram for Supply Grilles, Types OAH, OAV, CCH and CCV

2. Table of Effective Exhaust Areas Aef [m2]

Supply air volume

Effective jet velocity



17

4. Otpor i buka

Throw

efektivna istrujna brzina

Air

pres

sure

dro

p ∆

p tot

[Pa]

Effective jet velocity vef [m/s]

4. Air Pressure Drop and Sound Power Level4.1. ... with Damper Type L

Dam

per

setti

ng 2

5% o

pen

4.2. ... with Damper Types K, VK

Dam

per

setti

ng 3

° op

en

Air

pres

sure

dro

p ∆

p tot

[Pa]

Sou

nd p

ower

leve

l [dB

(A

)] Effective jet velocity vef [m/s]


4.3. Sound Power Level (based on Aef = 0.1 m2)

4.4. Correction values for Diag. 4.3

Correction

Effective jet velocity v ef [m/s]

3. Induction diagram

Induction i

Dam

per s

ettin

g

50%

clos

ed

Air

velo

city

vL

[m/s

]

18


18

1. Izborni dijagram za reπetke za dovod zraka: OAB, NRA, NRB, NRE i NRK

2. Tabela efektivnih istrujnih povrπina Aef [m2]

koliËi

na zrakaefektivna istrujna brzina

1. Selection Diagram for Supply Air Grilles, Types OAB, NRA, NRB and NRE


Supply air volume

Effective jet velocity



19

4. Otpor i buka

3. Dijagram indukcije

Throw


Air

pres

sure

dro

p ∆

p tot

[Pa]


4.1. ... with Damper Type L

Dam

per

setti

ng 2

5% o

pen


Dam

per

setti

ng 3

° op

en

Air

pres

sure

dro

p ∆

p tot

[Pa]

Sou

nd p

ower

leve

l [dB

(A

)] Effective jet velocity vef [m/s]



Correction


3. Induction diagram

Dam

per s

ettin

g

50%

clos

ed

4. Air Pressure Drop and Sound Power Level


Induction i

Air

velo

city

vL

[m/s

]

2020

1. Izborni dijagram za Linear Grilles za dovod zraka: OAV, CCV, OAB, NRA, NRB i NRK

2. Tabela efektivnih istrujnih povrπina Aef [m2/m]

Supply air v

olume

Effe

ctiv

e je

t ve

loci

ty

1. Selection Diagram for Supply Air Linear Grilles, Types OAV, CCV, OAB, NRA and NRB




4. OtporI i buka

Throw





brzina m

laza

3. Induction diagramInduction i

Throw

Air

pres

sure

dro

p ∆

p tot

[Pa]


4.1. ... with Damper Type L

Dam

per

setti

ng 2

5% o

pen


Dam

per

setti

ng 3

° op

en

Air

pres

sure

dro

p ∆

p tot

[Pa]

Sou

nd p

ower

leve

l [dB

(A

)]




Dam

per s

ettin

g

50%

clos

ed

4. Air Pressure Drop and Sound Power Level


Core velocit

y vL (m

/s)

Aef [m2/m] 0.01 0.02 0.05 0.1 0.2 0.4

Correction[dB(A)]

-10 -7 -3 0 3 6

Air

velo

city

vL

[m/s

]

22


22

1. Selection Diagram of Effective Exhaust Velocity vef (m/s)


Exhaust air volume rate V (m3 /h)

Effective exhaust area



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3. 1. Air Pressure drop for OAH, OAV, CCH, CCV, OAB, OAK, NRA, NRB Grilles with Damper Type L

3. 3. Sound Power Level (based on Aef = 0,1 m2)

3. 2. Air Pressure Drop for OAN-type Grille with Damper Type L

3. 4. Korekcija buka iz dijagrama 3. 3.

efektivna usisna brzina

efektivna usisna brzina

zaklo

pka

otvo

rena

zakl

opka

otv

oren

a

zakl

opka

otv

oren

a

Air

pres

sure

dro

p ∆

p tot

[Pa]

Effective exhaust velocity vef [m/s]

Sou

nd p

ower

leve

l [dB

(A

)]




Air

pres

sure

dro

p ∆

p tot

[Pa]

Correction

OAN-type grille

other grille types

Dam

per s

ettin

g 25

% o

pen

Dam

per s

ettin

g %

ope

n

Dam

per s

ettin

g 25

% o

pen

Klimaoprema d.d.Gradna 78A

HR-10430 Samobor, CROATIAPhone: + 385 1 33 62 513

Fax: + 385 1 33 62 [email protected]

1s1 - Supply and Exhaust Grilles-oah, Oav, Oab, Cch, Ccv, Oas, Oak, Oan, Oam, Ocm[1]

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Transcript of 1s1 - Supply and Exhaust Grilles-oah, Oav, Oab, Cch, Ccv, Oas, Oak, Oan, Oam, Ocm[1]