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