ecoTEC exclusive installation and maintenance instructions / 0020017768_02
20
X 2
X 20
X 40
X31
X41
Switchgear box
Water
through flow
sensor
Hot water outlet
(NTC)
Fan
Ignition electrode
Flow temperature
sensor (NTC)
Preference changeover valve
Gas valve
Water pressure sensor
Return temperature
sensor (NTC)
X 20/5 red
X 20/7 black
X 20/7 black
X 20/8 blue
X 2/12 green
X 2/11 red
X 2/9 black
Pump
X 20/18 red (24 VDC)
X 20/9 blue (Earth)
X 20/16 blue (Earth)
X 20/4 grey (PWM)
X 20/3 black (Hall signal)
X 20/17 red (24 VDC)
X 2/15 brown C
X 2/8 blue D
X 2/16 black A
X 2/7 pink B
X 2/3 red (+ 5V)
X 2/2 black (Earth)
X 2/6 green (Signal)
X 2/5 violet (Signal)
X 2/1 black
Secondary
heat exchanger
(NTC)
X 2/4 orange
X 2/10 black
Mains plug
Plug connection
X 22
Fig. 5.16 Electronic board layout ecoTEC exclusive
6 Start-up
