WDD 格栅

概述

• 用于制冷和加热应用，同时也可用于排气
• 前排立式叶片和后排水平叶片均可调
• 采用铝制结构
• 使用可见螺钉紧固件

配件

• 带有在加热操作中控制进气射流的漆蜡球形执行器的型号
• 流量调节阀
• 可选配具备测量和调节功能的静压箱
• 安装架
   

Dimensions

Halton WDD, rounded frame (R)

With OD (airflow adjustment damper) total depth is 48 mm + 45 mm.
 

Halton WDD, flat frame (F)

With OD (airflow adjustment damper) total depth is 48 mm + 45 mm.
 

Special dimensions

In addition to these standard sizes, other dimensions are available by special order. The maximum size is 1500mm x 600mm (LxH).

Material

The bevel angles of the outer frame have been welded so that the joints are almost invisible.

Accessories

Wax-bulb actuator

In applications, where both heating and cooling are provided, the air pattern can be changed automatically via the wax-bulb actuator.
The wax-bulb actuator alters the angles of the horizontal rear vane depending on the supply air temperature. Neither auxiliary energy nor dedicated control system are needed.

When cold air is supplied at a temperature up to 18°C the supply jet is horizontal. The vane angle is 0°. As the supply air temperature rises, the actuator piston progressively changes the angle of the rear vanes to direct the supply air jet downwards. Vane angle reaches 45° in 10 to 20 minutes.

No maintenance is required for the wax-bulb actuator.

Product Models

Halton WDD, rounded frame (R)

Halton WDD, flat frame (F)

Function

Supply air is supplied with horizontal and vertical deflection through the vanes into the space. The supply air mixes with the room air in front of the grille.
The supply air is directed with the horizontal adjustable vanes.
Moving the vertical vanes can change the length and form of the flow pattern.

In wall installations, the recommended distance from the ceiling is 200 mm, when the supply air is directed to the ceiling.
The rear vane angle can also be controlled by optional wax-bulb actuator.

The Halton WDD grille can also be used as an exhaust unit.

Installation

The grille is connected to the circular duct using either a Halton PRL balancing plenum or a Halton BDR plenum or alternatively directly to the rectangular duct using the IF/WDD installation frame.

Installation frame, IF/WDD              Balancing plenum, PRL     Plenum box, BDR

Clips fastening (standard)

The grilles are delivered with clips fastening as standard.
Clips fastening is used with Halton PRL, Halton BDR and IF/WDD.

Concealed screw fastening (optional)

Concealed screw fastening is possible when the grille is installed with an IF/WDD installation frame or with a Halton BDR plenum, not with a Halton PRL balancing plenum.
Holes are provided for screws in Halton BDR.

For ceiling installation, concealed screw fastening is recommended.

The dimensions of the installation holes are LxH when an installation frame is used, and (L-5) x (H-5) without installation frame.

Visible screw fastening

For ceiling installation, we recommend using visible screw fastening. The auto screws, 4.2×25 (bevel headed screws) are supplied.

Adjustment

Supply

In order to enable airflow adjustment and measurement of airflow rate we recommend connecting the diffuser to a Halton BDR plenum or Halton PRL balancing plenum equipped with the MSM module.
The supply flow rate is determined by using the measurement and adjustment module MSM.
Detach the grille and pass the tubes and control spindle through the grille.
Measure the differential pressure with a manometer. The flow rate is calculated using the formula below.

Adjust the airflow rate by rotating the control spindle until the desired setting is achieved.
Lock the damper position with a screw.
Replace the tubes and spindle into the plenum and replace the grille.

The k-factor for installations with different safety distances
(D= duct diameter)

Exhaust

The airflow rate is selected by measuring the pressure difference between the measurement tap on the Halton PRL balancing plenum or Halton BDR plenum and the room air.
The corresponding airflow rate is calculated and can be adjusted by turning the control spindle of the adjustment unit MEM.

Airflow adjustment damper OD

The airflow rate can also be adjusted by turning the damper blades behind the grille with a screwdriver. The measurement is carried out when grille is installed.

Servicing

Remove the grille by gently drawing it out by the frame. Use a screwdriver if necessary.
Clean the parts by wiping them with a damp cloth.
Push the grille back into place until the springs lock (or fix by screwing on the concealed screws).

Option:
With balancing plenum Halton PRL + MSM (MEM) or Halton BDR + MSM (MEM)

Remove the measurement and adjustment module by gently pulling the shaft (NB not the control spindle).
Wipe the parts with a damp cloth, instead of immersing in water.
Remount the measurement and adjustment module by pushing in the shaft until the module meets the stopper.
Push the grille back into place so that the clips lock.

Specification

The grille is made of extruded aluminium, with an anodised or epoxy-painted with a white (RAL9010) standard colour.
The bevel angles of the outer frame are welded so that the joints are almost invisible.
The Halton WDD grille has horisontal and vertical adjustable vanes.
The rear vanes direct the supply air jet horizontally. The length and form of the air pattern are adjusted by turning the front vanes.

Optionally

The supply air jet shall be controlled according to supply air temperature by a wax-bulb actuator.

Alternative 1

The grille shall be connected to the ductwork using a plenum, with mineral wool as sound insulation material.

Alternative 2

The grille can be connected to the ductwork using a balancing plenum, which comprises sound attenuation material made of polyester fibre with a washable surface.

The plenum comprises an airflow measurement and adjustment unit.
The grille is removable in order to provide access to the measurement and adjustment module in the plenum.

Order Code

WDD-L-H

L = Length 
      200, +1, .., 1500

H = Height
       100, +1, .., 600
 

Other options and accessories

FM = Frame model
        R       Rounded
        F       Flat

VP = Vane positioning
        V       Vertical at front
        H       Horizontal at front

FS = Fastening
        CL     Clips
        SF     Screw fastening
        CC     Concealed screw fastening

FI  = Finishing
        PN       Painted
        AN       Anodised     
        MF       Mill finished

CO = Colour
         SW    White (RAL 9003)
         X       Special colour
         N       No painting

ZT = Tailored product
        N        No
        Y        Yes (ETO)

AC = Accessories
         WM    Wax-bulb actuator
 

Sub products

         BDR    Plenum
         PRL    Plenum
         IF        Installation frame (Grilles)
         OD      Opposed blade damper (Grilles)
 

Code example

        WDD-200-100, FM=R, FS=CL, FI=AN, CO=N, ZT=N