Technical data

28
4 Boiler installation sequence
Instructions for installation and servicing ecoMAX28
4.16.3 Electronic board layout (continued)
Fig. 4.19: Connection wiring ecoMAX 635
Fan unit
Ignition electrode
Pump
NTC
flow
Gas valve assembly
NTC
backflow
X 2/4 red
X 2/10 white
X 2/15 blue
Plug-in coupling
Electronic
control box
987
543
N
L
NL
Pump 2. Pump
Contact
therm
L N
24V I
230V
RT 24V
230V
RT 230V
X 4
X 10 X 7
X 8
X 6
X 2
Coding resistance
13
1
1 1
1
1
X 2/9 red (22 VDC)
X 2/24 blue (earth)
X 2/12 blue (earth)
X 2/7 grey (PWM)
X 2/3 black (Hall signal)
X 2/17 red (22 VDC)
Water Switch
83 41 77_12 GB04.04.qxd 22.09.2004 12:34 Uhr Seite 28