Wiring Diagram - Vaillant ecoMAX 665 Installation And Maintenance Manual

4.8.5 Wiring diagram

Flow NTC
X 2/4 red
X 2/10 white
X 2/15 blue
Water pressure switch
X 2/8 black
X 2/20 black
Electronics box
Fig. 4.14 Wiring diagram ecoMAX 665
Installation and maintenance manual ecoMAX 665 / 0020020159_03
Ignition electrode
Return NTC
Gas fitting
Plug-in couplings
X 2/9 red (22 VDC)
X 2/24 blue (earth)
Water flow switch
Integral pump
X 4 X 10 X 7
1 1
1
X 6 13
X 2/12 blue (earth)
X 2/7 grey (PWM)
X 2/3 black (hall signal)
X 2/17 red (22 VDC)
X 2/23 black (earth)
X 2/6 brown (signal)
X 2/24 black (earth)
X 2/2 orange (signal)
2 4V I
2 3 0V
X 8
1 1
7 8 9
Contact-
T herm
R T 2 4V
X 2
Coding resistance
Fan
230 V connection
C1/C2 connector
(volt free switching cylinder thermostat)
Cylinder NTC connection
(Article number 306 257)
tank sensor (plug colour: white)
L N 3 4 5 L N L N
2 3 0V R T 2 3 0V
Pump 2. Pump
Installation 4
Plug-in coupling
19