Application

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

Description

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

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Product Information

Certificates

Operation manuals