Wiring System - Vaillant ecoTEC plus Instructions For Installation And Servicing

4 Boiler installation sequence

4.4.2 Wiring system

• Connect the mains supply to the terminal block, see
fig 4 .8.1 the pump can be connected directly to the
terminal block or alternatively as shown in diagram
4.8.2 .
Fig 4.8.1 Mains Supply Connection
mains supply
connection
CH pump
Note: All cables connected
to the appliance should be
permanently fixed to the wall
* Remove red link if
external 230V controls
are to be fitted
Fig. 4.8.2 Mains supply and alternative pump switch live connection
Green/yellow (earth) wire
Blue (neutral) wire
Brown (live) wire
a Caution!
Do not connect any mains 230V power to the
connections 7-8-9 or BUS (+,-).
22
red link *
pump
connecticon
230 Vac system controls
• zone valve
• programmer
• room thermostat
• cylinder thermostat
junction box
3 amp fuse
double pole isolator
230 Vac 50 Hz
permanent
supply
– boiler terminal Earth sign
– boiler terminal N
– boiler terminal L
Note!
h
• Ensure that the wires are securely fixed in
the terminal block.
• Refit the electronics box cover by pushing
into place until it clips back into position.
• Raise the electronics box.
• Check the electrical installation by carrying out short
circuit, earth continuity and resistance to earth tests
and a check for correct polarity.
Instructions for installation and servicing ecoTEC plus 0020020828_07