Type WG-JZ

Combination with a multileaf damper

Combinations of external weather louvres and multileaf dampers as a protection against the direct ingress of rain, leaves and birds, and for shut-off and control

  • Maximum width of 2000 mm, maximum height of 1995 mm
  • Low differential pressure due to aerofoil blades
  • Low air-regenerated noise
  • All aerodynamic data is measured in aerodynamics and acoustics laboratories
  • Aerofoil parallel or opposed hollow blades
  • Casing air leakage to EN 1751, class C
  • Available in standard sizes and many intermediate sizes
  • Pre-assembled combination, hence fast and easy to install


Optional equipment and accessories

  • Installation subframe
  • Insect screen
  • Powder-coated or anodised surface
  • Actuators: Open/Close actuators, modulating actuators

Combination of external weather louvre and multileaf damper, variant WG-AL-JZ-S 00136498_0


  • Application
  • Description

Application

  • Combinations of Type WG external weather louvres and Type JZ multileaf dampers for protecting fresh air and exhaust air openings in air conditioning systems
  • Protection against the direct ingress of rain as well as against leaves and birds
  • Recommended face velocity for fresh air openings: 2 – 2.5 m/s max.
  • As an acting element in the volume flow and pressure control
  • For shutting off ducts and openings in walls
  • Parallel action blades are preferably used for opening/closing
  • Opposed action blades are due to their characteristics preferably used for variable operation

Special characteristics

  • Any intermediate sizes within the standard size range are available
  • Low installation effort on site since external weather louvre and multileaf damper are factory combined and assembled
  • Aerofoil parallel or opposed hollow blades
  • Operating temperature –20 – 100 °C
  • For very large sizes, several combinations can be arranged side by side or on top of each other
  • Low-maintenance, robust construction
  • Low differential pressure and low noise due to aerofoil blades

Nominal sizes

  • B: 200 – 2000 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665, 1830, 1995 mm (intermediate sizes 183 – 1998 in increments of 1 mm, except for standard size H – 1 mm, H + 1 mm, H + 2 mm)
  • Any combination of B × H

Variants

  • WG-JZ-S: External weather louvre and multileaf damper with opposed blade action, both made of galvanised sheet steel
  • WG-JZ-P: External weather louvre and multileaf damper with parallel blade action, both made of galvanised sheet steel
  • WG-AL-JZ-S: External weather louvre made of aluminium and multileaf damper with opposed blade action made of galvanised sheet steel
  • WG-AL-JZ-P: External weather louvre made of aluminium and multileaf damper with parallel blade action made of galvanised sheet steel

Construction

Cover grille

  • Wire mesh
  • 1: With insect screen, galvanised steel (only WG-JZ)
  • 2: With wire mesh, stainless steel (only WG-AL-JZ)
  • 3: With insect screen and wire mesh, stainless steel (only WG-AL-JZ)


Border

  • Border fixing holes
  • U: Without fixing holes

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Shut-off damper
  • Blades with external linkage
  • Drive arm

Attachments

  • Quadrant stays and limit switches: Quadrant stays to adjust the damper blades (stepless adjustment) and for capturing the end positions
  • Open/Close actuators: Actuators for opening and closing multileaf dampers
  • Modulating actuators: Actuators for stepless blade adjustment
  • Pneumatic actuators: Pneumatic actuators for opening and closing multileaf dampers

Accessories

  • Installation subframe: Installation subframe for the fast and simple installation of external weather louvres

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Multileaf damper

  • Rectangular casing, welded (P1: casing with screws), material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • External linkage, robust and durable, consisting of the coupling rod and and horizontal arms
  • Blade shafts, Ø12 mm, with notch to indicate the blade position

Materials and surfaces

  • Border, mullion and blades made of formed galvanised sheet steel or aluminium
  • Wire mesh made of galvanised steel or stainless steel
  • Casing and blades of the multileaf damper made of galvanised sheet steel
  • Blade shafts, drive arm and external linkage made of galvanised steel
  • Plain bearings made of plastic
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Contamination should be removed as it may lead to corrosion and to increased closed blade air leakage

Technical information

Function, Technical data, Quick sizing, Specification text, Order code, Related products

  • Function
  • Technical data
  • Specification text
  • Order code
  • Related products

Functional description

External weather louvres are externally mounted air transfer devices for the fresh air and exhaust air of air conditioning systems. They are installed in external walls and façades. Their narrowly arranged blades give good protection against the direct ingress of rain as well as against leaves and birds.

Under certain unfavourable conditions, such as heavy rain, and depending on the airflow velocity it might happen that slight quantities of water enter together with the air.

This is why the airflow velocity in fresh air openings should not exceed 2 – 2.5 m/s.


Linkage

Multileaf dampers with external linkage can have parallel action blades or opposed action blades.

An external linkage transfers the synchronous rotational movement from the drive arm to the individual blades. Even very large multileaf dampers can be safely opened and closed with this type of linkage.

Opposed action blades close at different speeds since the linkage includes a transverse link. This facilitates the closing process and reduces the closed blade air leakage.

Nominal sizes

200 × 180 to 2000 × 1995 mm

Free area

Approx. 60 %, with insect screen approx. 45 %

Total differential pressure – exhaust air

30 Pa at 2.5 m/s

Total differential pressure – fresh air

35 Pa at 2.5 m/s

Operating temperature

–20 to 100 °C


Combinations of an external weather louvre and a multileaf damper.

Rectangular external weather louvre as a protection of air conditioning systems against the direct ingress of rain, leaves and birds into fresh air and exhaust air openings.

Rectangular multileaf damper for volume flow and pressure control as well as for shutting off ducts and openings in walls and ceiling slabs.

Ready-to-install component which consists of a border, aerofoil rain defence blades, and a wire mesh at the rear.

Shut-off damper which consists of the casing, aerofoil blades and the blade mechanism.

Suitable for duct pressures up to 1000 Pa.

With flange, suitable for duct connection.

The blade position is indicated externally by a notch in the blade shaft extension.

Casing air leakage to EN 1751, class C.

Special characteristics

  • Any intermediate sizes within the standard size range are available
  • Low installation effort on site since external weather louvre and multileaf damper are factory combined and assembled
  • Aerofoil parallel or opposed hollow blades
  • Operating temperature –20 – 100 °C
  • For very large sizes, several combinations can be arranged side by side or on top of each other
  • Low-maintenance, robust construction
  • Low differential pressure and low noise due to aerofoil blades

Materials and surfaces

  • Border, mullion and blades made of formed galvanised sheet steel or aluminium
  • Wire mesh made of galvanised steel or stainless steel
  • Casing and blades of the multileaf damper made of galvanised sheet steel
  • Blade shafts, drive arm and external linkage made of galvanised steel
  • Plain bearings made of plastic
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

Construction

Cover grille

  • Wire mesh
  • 1: With insect screen, galvanised steel (only WG-JZ)
  • 2: With wire mesh, stainless steel (only WG-AL-JZ)
  • 3: With insect screen and wire mesh, stainless steel (only WG-AL-JZ)


Border

  • Border fixing holes
  • U: Without fixing holes

Technical data

  • Nominal sizes: 200 × 180 to 2000 × 1995 mm
  • Free area: approx. 60 %, with insect screen approx. 45 %
  • Total differential pressure – exhaust air: 30 Pa at 2.5 m/s
  • Total differential pressure – fresh air: 35 Pa at 2.5 m/s
  • Operating temperature: –20 – 100 °C

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [dB(A)]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

00240715_0

 Type
WG-JZ       Combination of external weather louvre and multileaf damper

 Material – WG
       No entry: galvanised steel
AL       Aluminium

 Construction – WG
       No entry: wire mesh, galvanised steel
1       Insect screen, galvanised steel
2       Wire mesh, stainless steel (only WG-AL)
3       Insect screen and wire mesh made of stainless steel (only WG-AL)

 WG border
       No entry: With fixing holes
U       Without fixing holes

 Function – JZ
S       Opposed (standard)
P       Parallel

 Operating side – JZ
       No entry: on the right
L       Left side

 

 Nominal size [mm]
       B × H

 Installation subframe – WG
       No entry: None
ER       With (not for construction without fixing holes)

 Attachments – JZ
       No entry: None
Z04 – Z07       Quadrant stay
Z12 – Z51       Actuators
ZF01 – ZF15       Spring return actuators
Z60 – Z77       Pneumatic actuators

 Damper blade safety function – JZ
       Only for spring return actuators or pneumatic actuators
NO       Pressure off/power off to OPEN
NC       Pressure off/power off to CLOSE

 Surface – WG
       No entry: standard construction
P1       Powder-coated, RAL Classic colour
PS       Powder-coated, DB colour
       Only for WG-AL
S2       Anodised to EURAS standard, E6-C-… (31 to 35)
S3       Anodised to EURAS standard, E6-C-0

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Notes on the order code

⑦ The nominal size equals the dimensions of the duct connected to the multileaf damper (without actuator). Depending on the size of the installation opening, an installation subframe may have to be used.

  • Installation opening without installation subframe: B + 95 mm, H + 95 mm
  • Installation opening with installation subframe: B + 115 mm, H + 115 mm


 WG-JZ multileaf dampers cannot be retrofitted with an actuator

Order example: WG–AL–1–JZ–S–L/1600×1995/ER/Z12/P1–RAL 7001

Material – WG

Aluminium

Construction – WG

Insect screen, galvanised steel

Function – JZ

Opposed

Operating side – JZ

Left side

Nominal size

1600×1995 mm

Installation subframe – WG

With

Attachments – JZ

Actuator SM230A

Surface – WG

Powder-coated, RAL 7001, silver grey


 

Variants, Dimensions and weight

  • Variants
  • Dimensions and weight

WG-JZ-S

Variant

  • External weather louvre and multileaf damper with opposed blade action, both made of galvanised sheet steel

Construction

  • Wire mesh
  • 1: With insect screen
  • U: Border without fixing holes

1 can be combined with U

Nominal sizes

  • B: 200 – 2000 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665, 1830, 1995 mm (intermediate sizes 183 – 1998 in increments of 1 mm, except for standard size H – 1 mm, H + 1 mm, H + 2 mm)
  • Any combination of B × H

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Shut-off damper
  • Blades with external linkage
  • Drive arm

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Multileaf damper

  • Rectangular casing, welded (P1: casing with screws), material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • External linkage, robust and durable, consisting of the coupling rod and and horizontal arms
  • Blade shafts, Ø12 mm, with notch to indicate the blade position

Materials and surfaces

External weather louvre

  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

WG-JZ-P

Variant

  • External weather louvre and multileaf damper with parallel blade action, both made of galvanised sheet steel

Construction

  • Wire mesh
  • 1: With insect screen
  • U: Border without fixing holes

1 can be combined with U

Nominal sizes

  • B: 200 – 2000 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665, 1830, 1995 mm (intermediate sizes 183 – 1998 in increments of 1 mm, except for standard size H – 1 mm, H + 1 mm, H + 2 mm)
  • Any combination of B × H

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Shut-off damper
  • Blades with external linkage
  • Drive arm

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Multileaf damper

  • Rectangular casing, welded (P1: casing with screws), material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • External linkage, robust and durable, consisting of the coupling rod and and horizontal arms
  • Blade shafts, Ø12 mm, with notch to indicate the blade position

Materials and surfaces

External weather louvre

  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

WG-AL-JZ-S

Variant

  • External weather louvre made of aluminium and multileaf damper with opposed blade action made of galvanised sheet steel

Construction

  • Wire mesh
  • 1: With insect screen
  • 2: With wire mesh, stainless steel
  • 3: With insect screen and wire mesh, stainless steel
  • U: Border without fixing holes

1, 2, 3 can be combined with U

Nominal sizes

  • B: 200 – 2000 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665, 1830, 1995 mm (intermediate sizes 183 – 1998 in increments of 1 mm, except for standard size H – 1 mm, H + 1 mm, H + 2 mm)
  • Any combination of B × H

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Shut-off damper
  • Blades with external linkage
  • Drive arm

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Multileaf damper

  • Rectangular casing, welded (P1: casing with screws), material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • External linkage, robust and durable, consisting of the coupling rod and and horizontal arms
  • Blade shafts, Ø12 mm, with notch to indicate the blade position

Materials and surfaces

External weather louvre

  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour
  • S2: Anodised to EURAS standard, E6-C-31...35
  • S3: Anodised to EURAS standard, E6-C-0

WG-AL-JZ-P

Variant

  • External weather louvre made of aluminium and multileaf damper with parallel blade action made of galvanised sheet steel

Construction

  • Wire mesh
  • 1: With insect screen
  • 2: With wire mesh, stainless steel
  • 3: With insect screen and wire mesh, stainless steel
  • U: Border without fixing holes

1, 2, 3 can be combined with U

Nominal sizes

  • B: 200 – 2000 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665, 1830, 1995 mm (intermediate sizes 183 – 1998 in increments of 1 mm, except for standard size H – 1 mm, H + 1 mm, H + 2 mm)
  • Any combination of B × H

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Shut-off damper
  • Blades with external linkage
  • Drive arm

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Multileaf damper

  • Rectangular casing, welded (P1: casing with screws), material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • External linkage, robust and durable, consisting of the coupling rod and and horizontal arms
  • Blade shafts, Ø12 mm, with notch to indicate the blade position

Materials and surfaces

External weather louvre

  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour
  • S2: Anodised to EURAS standard, E6-C-31...35
  • S3: Anodised to EURAS standard, E6-C-0

Materials

Order code detail Part Material Notes

Front border

Formed sheet steel, galvanised

Material thickness 1.5 mm

Blades

Formed sheet steel, galvanised

Material thickness 0.63 mm

Mullion

Formed sheet steel, galvanised

From B = 1385 mm

Wire mesh

Galvanised steel


Casing and blades of the multileaf damper

Galvanised sheet steel


Blade shafts, drive arm and external linkage

Galvanised steel


Bearings

Plastic


AL

Front border

Extruded aluminium sections, material no. EN AW-6060 T66

Material thickness 1.7 mm

AL

Blades

Extruded aluminium sections, material no. EN AW-6060 T66

Material thickness 1.35 mm

AL

Stabilising mullion

Extruded aluminium sections, material no. EN AW-6060 T66

From B = 1385 mm

1

Insect screen

Galvanised steel

Only WG-AL-JZ

2

Wire mesh

Stainless steel, material no. 1.4301

Only WG-AL-JZ

3

Wire mesh

Stainless steel, material no. 1.4301

Only WG-AL-JZ

3

Insect screen

Stainless steel, material no. 1.4301

Only WG-AL-JZ


Surfaces

Order code detail Part Surface Notes

Border and blades

Untreated


P1-RAL ...

Border and blades

Powder-coated, RAL ... CLASSIC


PS-DB ...

Border and blades

Powder-coated, DB ...


S2

Border and blades

Anodised to EURAS standard, E6-C-31...35

Only WG-AL-JZ

S3

Border and blades

Anodised to EURAS standard, E6-C-0

Only WG-AL-JZ


WG-JZ, weight

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 1800 2000
mm kg

180

10

15

20

24

29

33

38

42

47

51

345

11

16

21

26

31

36

41

46

51

56

510

13

19

25

31

37

43

49

55

61

67

675

16

23

30

37

44

51

58

65

72

79

840

18

26

34

42

50

58

66

74

82

90

1005

20

28

37

45

54

62

71

79

88

96

1170

23

32

42

51

61

70

80

89

99

108

1335

26

36

47

57

68

78

89

99

110

120

1500

30

41

52

63

74

85

96

107

118

129

1665

34

46

58

70

82

94

106

118

130

142

1830

38

51

64

77

90

103

116

129

142

155

1995

40

56

72

88

104

120

136

152

168

184


WG-AL-JZ, weight

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 1800 2000
mm kg

180

9

14

18

23

27

31

34

38

43

47

345

10

14

19

24

28

33

36

41

46

50

510

12

17

22

28

33

38

42

47

54

60

675

14

21

27

33

39

45

51

58

65

70

840

16

23

30

37

44

52

58

66

75

81

1005

17

25

32

40

48

56

63

70

79

86

1170

19

28

37

47

55

63

70

79

89

97

1335

22

32

42

53

61

70

79

88

100

107

1500

27

38

48

59

68

77

86

96

107

115

1665

31

44

54

66

76

87

96

107

119

127

1830

36

49

61

74

85

96

106

117

130

138

1995

38

55

70

86

100

114

126

140

155

166


Space required for attachments

Attachments X Bmin
Attachments mm

Z12 – Z51

180

385

ZS21 – ZS22

180

385

ZF01 – ZF15

180

385

ZS99

180

385

Z60 – Z77

200

405

In WG-JZ combinations with an attachment the width of the multileaf damper is by X mm shorter than the external weather louvre.

Bmin is the minimum width of a WG-JZ combination with an attachment (X + 205 mm)


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • With or without installation subframe
  • Torsion-free installation

Note

  • Multileaf dampers without actuators have shorter shafts; it is not possible to retrofit actuators
  • Combinations with multileaf dampers that allow for retrofitting an actuator are available upon request

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise for the louvre

A [m²]

Upstream cross section

v [m/s]

Airflow velocity based on the upstream cross section

vt [m/s]

Airflow velocity based on the upstream cross section (type NL)

V [m³/h] and [l/s]

Volume flow rate

Δpt [Pa]

Total differential pressure


All sound power levels are based on 1 pW.

Principal dimensions

B [mm]

Duct width

B₁ [mm]

Duct width for subdivided louvres

H [mm]

Duct height

H₁ [mm]

Duct height for subdivided louvres

n [ ]

Number of flange screw holes

m [kg]

Weight

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Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +7 495 221-5161 | Fax: +7 495 221-5171