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Installation and Operating Instructions
Central ventilation unit – KWL 250 W/W ET
5.1.2 Wiring diagram
Distribution board
L N
L
N
L
L
N
L
Low pressure
R ev ision s witc h
s witch
Pow er cabel ( 2 m x 3 1,5 mm
S
E
A
Motherboard
B
1. Extract air fan tacho (w s)
2. GND (gn/bl)
3. Etract air fan PWM (gb)
4. Supply air fan tacho (w s)
5. GND (gn/bl)
6. Supply air fan PWM (gb)
C
1. Extract air temperature sensor
2. Outdoor air temperature sensor
3. No use
4. Exhaust air temperature sensor
5. Supply air temperature sensor
85499-239 SS-1418 25.01.2021
5.2
Connections for networks and accessories
5.2.1 Connect network
The network is connected via the network cable led out of the cable gland with a plug.
1. Connect network cable to router or PC/laptop.
5.2.2 Connect accessories
The accessories are connected, except for the electric preheater (internal), via the external terminal box.
1. Open terminal box.
2. Connect accessories, see chapter 5.1 „Connect unit", page 12.
ge-gn
1
L
2
N
3
N
L
4
N
N
5
L
L
L
6
'
2
,
N
LF
230 V~)
7
N
N
'
b
r
8
b
9
l
b
r
10
b
l
11
12
13
b
14
r
b
l
15
2
L
16
3
L
17
1
18
N
T1
T2
110 °C
60 °C
M
R1
Bypass
D
LAN
RH%
Internal humidity sensor
S
Supply air fan
E
Extract air fan
M
Damper motor
R1
Preheating rediator
LF
line filter
14
MB_A
MB_A
MB_B
MB_B
+24V
+24V
RS_A
RS_A
RS_B
RS_B
GND
see
NTC
SS-1433
GND
+24V
RS_A
+24V
RS_A
RS_B
RS_B
GND
GND
+11V1
+24V
D/I1
GND
+24V
RM/I
D/I2
RM/O
Motherboard
Transf ormer
RH%
A
D
1
2
3
C
4
B
5
1 2 3 4 5 6
Farbcode/ color code / code
couleur (IEC757)
BK-sw-schwarz-black-noir
BN-br-braun-brown-brun
RD-rt-rot-red-rouge
OG-or-orange-orange-orange
Y E-ge-gelb-y ellow-jaune
GN-gn-grün-green-v ert
BU-bl-blau-blue-bleu
VI-v i-v iolett-v iolett-v iolet
WH-ws-weiß-white-blanc
EN
Fig. 19
GND
AN/I
E
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