Vaillant ecoTEC plus Instructions For Installation And Servicing page 24
Wall hung open vent condensing boiler
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Also See for ecoTEC plus:
- Installation and maintenance instructions manual (92 pages) ,
- Installation and maintenance manual (56 pages) ,
- Instructions for installation and servicing (52 pages)
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4 Boiler installation sequence
NTC
flow
X 20/8 blue
black link
X 20/7 black
X 20/5 red
Gas valve assembly
X20
black
Electronic control box
Fig. 4.10 Mains Supply Connection
24
NTC
return
X 20/18 red (24 Vdc)
X 20/9 blue (earth)
red
X2
-
+
BUS
Ignition electrode
Fan unit
X 20/16 blue (earth)
X 20/4 grey(PWM)
X 20/3 black (Hall signal)
X 20/17 red (24 Vdc)
Chassis earth
connection
red
7
8
9
L
N
3
4 5
24V
230V
green/yellow
green/yellow
green/yellow
Pump
fuse T2E
250 Volts
Installation and Servicing ecoTEC plus
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