Chapter 4 Controller; Controller Kwl-Bu/Ba With Status Display; Slide Switch; Switching Step Setting Range - Helios KWL EC 220 D Eco R Montage- Und Betriebsvorschrift

Installation and Operating Instructions
CHAPTER 4
CONTROLLER
Compact ceiling units KWL EC 220 D Eco
4 .0

Controller KWL-BU/BA with status display

The KWL EC 220 D Eco ceiling unit is controlled by the flush-mounted controller KWL-BU (for flush-moun-
ting or KWL-BA for surface-mounting, accessories) included in the scope of delivery. It allows three freely defi-
nable manual operating stages, which can be adjusted using the potentiometer on the circuit board.
A deviating air volume from the extract air fan to the supply air fan in the range ±10 % can be set via the potentiometer
"Ofs".
4 .1

Switching step setting range

The controller KWL-BU has 4 potentiometers:
Potentiometer name
S1
S2
S3
Ofs
*Offset = Deviation from extract air fan to supply air fan
 Slide switch
 S c a l e s t a g e S 1 - S 3
 Error message "flash code"
see section 6.8
Potentiometer:
 Stage S1
 Stage S2
 Stage S3
 Offset "Ofs"
TIP: Voltage measurement:
The output voltage of the supply
air fan in the set operating stage
can be measured via COM and
A.
Scale Designation
Stage 1 of supply air fan
Stage 2 of supply air fan
Stage 3 of supply air fan
Offset* for extract air fan
9




COM


A
Setting range
2.5 to 5.0 Volt
5.5 to 7.5 Volt
7.5 to 10.0 Volt
± 10 %
EN
Fig .20
