Swegon Indoor Climate Systems 2004 - Air distribution products - Rev. Dec. 15, 2005
www.swegon.comLTAb
Non vision transfer grille for
wall or door mounting
FUNCTION
The LTA is a rectangular grille for installation in walls or doors. It is used as a supply or transfer air diffuser between rooms where light transmission is not desirable.
QUICK FACTS
- Stops light transmission
- Two black painted diffusers in series are sufficient for darkroom walls
- Telescopic flanged frame supplied in two widths
- Available in alternative colours
QUICK GUIDE
A I R F L O W - P R E S S U R E D R O P | | | | |
|
| l/s | | |
Size | 10 Pa | 15 Pa | 20 Pa |
200-100 | 14 | 19 | 21 |
400-100 | 30 | 35 | 42 |
600-100 | 46 | 55 | 65 |
400-150 | 52 | 62 | 72 |
600-150 | 70 | 83 | 100 |
800-150 | 110 | 130 | 150 |
400-200 | 70 | 83 | 100 |
600-200 | 110 | 130 | 150 |
800-200 | 142 | 180 | 200 |
|
The data applies to one grille mounted in a wall opening. | | | | |
DESIGN
The grille is manufactured in two different versions.
LTA 1 consists of the angled profile blades mounted in an outer frame. The frame is supplied with countersunk screw holes.
LTA 2 consists of the blades alone.
MATERIALS AND SURFACE TREATMENT
The grille is manufactured entirely in extruded aluminium profiles which is anodised. The unit is also available in other standard colours: Dusty grey 7037, white aluminium RAL 9006, jet black RAL 9005, grey aluminium RAL 9007 and signal white RAL 9003 (NCS 0500).
ACCESSORIES
Flanged frame:
LTAT 1b: telescopic flanged frame. This is used as wall channel.
PLANNING (See Figure 1)
This grille is used primarily as a transfer air device in walls where the transmission of light is undesirable. By mounting two black painted grilles in series, there is no risk of transmitted light into a dark room.
LTA 1 is used on one side of the wall or as part of a pair mounted on both sides of the same wall.
LTA 2 is designed to be flush mounted in walls or doors.
INSTALLATION (See Figure 1)
Type 1 is fixed in position in a wall or door through the countersunk screw holes.
Type 2 is recessed into a door or panel and then clamped in place using beading, profiles etc. supplied by others.
MAINTENANCE
The grille can be cleaned when necessary using lukewarm water and detergent.
ENVIRONMENT
The declaration of construction materials is available on our website.
Figure 1.Planning. Installation.
1. LTA 1
2. LTAT 1b-50
3. LTA 2
4. Wooden frame, not included.
TECHNICAL DATA
- Sound level dB(A) applies to rooms of 10 m2 equivalent absorption area.
Engineering graphs - LTA - Transfer air
Air flow - Pressure drop - Sound level
- The graphs illustrate data for a grille mounted in a wall opening.
- The graphs must not be used for commissioning.
- The dB(A) values are for rooms with normal acoustic absorption of 4 dB.
- The dB(C) value is normally 6-9 dB’s higher than the dB(A) value. For more accurate calculations, see the calculation template in the chapter on Acoustics in the Technical Information section of this catalogue.
LTAb
Size designation
1. 200-100
2. 400-100
3. 400-150
4. 400-200
LTAb
Size designation
5. 600-100
6. 600-150
7. 600-200
8. 800-150
9. 800-200
DIMENSIONS AND WEIGHT