9
01
9
Air Heater
WD-A, WD-U
Assembly
05
05.07 Lamellae Adjustment, manual
1. First bend lamella
manually into the requested position.
2. Adjust remaining lamellae manually.
In case of corrections of the adjustment angle, the lamellae can be bent several times without problems.
Attention!
Blow-out louver 503-W is installed behind the blow-out louvers 500-W, 501-D.
Firstly adjust lamellae 500-W, 501-D, then proceed with 503-W as described above.
05.08 Lamellae Adjustment, automatic
Energy-saving louver 505-W/506-D-S, with switching device 678, prevents drifting of the primary air stream by high
temperature difference between primary air and room air.
By using the energy-saving louver, the drifting (thermal lift) of the primary air stream, especially during the heating-
up period, can be opposed. In choke position, there are single air jets, so that secondary air (room air) is mixed to
the primary air stream. Thus, the air inlet - primary air stream is increased and cooled in the core.
By the control device (order No. 678), the temperature difference between nominal and real value of the room tem-
perature is permanently determined.
Acc. to the determined difference as well as the adjustment at the control device (steepness of the control curve),
the servo-motor for the choke louver is activated.
> high temperature difference = choke position
< low or no temperature difference (heating-up finished) = unchoked position.
1
1
1
1
1
1
1
1
1
Blow-out louver
basic version Nr. 500 WD
Secondary air
No. 504
Blow-out louver
ceiling 4-directions No. 502 D
W
D
Blow-out louver
rotated 90° No. 503 W
usable with 500 WD
