Application
Special characteristics
Nominal sizes
Variants
Construction
Cover grille
Border
Parts and characteristics
Attachments
Accessories
Construction features
External weather louvre
Multileaf damper
Materials and surfaces
Maintenance
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
Materials and surfaces
Construction
Cover grille
Border
Technical data
Sizing data
Air-regenerated noise
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.
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.
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 |
WG-JZ-S
Variant
Construction
1 can be combined with U
Nominal sizes
Parts and characteristics
Construction features
External weather louvre
Multileaf damper
Materials and surfaces
External weather louvre
WG-JZ-P
Variant
Construction
1 can be combined with U
Nominal sizes
Parts and characteristics
Construction features
External weather louvre
Multileaf damper
Materials and surfaces
External weather louvre
WG-AL-JZ-S
Variant
Construction
1, 2, 3 can be combined with U
Nominal sizes
Parts and characteristics
Construction features
External weather louvre
Multileaf damper
Materials and surfaces
External weather louvre
WG-AL-JZ-P
Variant
Construction
1, 2, 3 can be combined with U
Nominal sizes
Parts and characteristics
Construction features
External weather louvre
Multileaf damper
Materials and surfaces
External weather louvre
Materials
– | 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
– | 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
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
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
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 and commissioning
Note
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
We are here for you
Please specify your message and type of request.
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051
Contact
Thank you for your message!
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.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051