Vaillant ecoTEC plus 618 Specifications download pdf (Page 23)

23Instructions for installation and servicing ecoTEC

Danger!

This appliance must be earthed.

Danger!

Mains connection terminals L and N remain live

even when the boiler on/off control is switched

off.

Note

Do not connect any power voltage to the con-

nections 7-8-9 or BUS (+,-).

Note

Ensure that all cords pass through the cable

clamps in the rear of the control box and are

securely fixed. Ensure that the power supply is

connected such that the current carrying con-

ductors become taut before the earth conductor

should the supply cord slip from the cable clamp.

4.13.2 Connection to the main supply

• Remove the front case and lower the control panel.

Fig. 4.13 Opening the electronics box

• Unclip the bottom of the terminal box cover and hinge

back to reveal the connection plugs.

• Feed the power supply flex into the appliance and the

control panel through the cable clamps provided and

tighten.

-+789 LN 345

Fig. 4.14 Wiring system

• Connect the flex to the L, N and earth plug to the ter-

minal block.

Green/yellow (earth) wire – boiler terminal Earth sign

Blue (neutral) wire – boiler terminal N

Brown (live) wire – boiler terminal L

Note

Do not connect any power voltage to the con-

nections 7-8-9 or BUS (+,-).

Note

Ensure that the wires are securely fixed in the

terminal block.

• Refit the terminal box cover by pushing into place until

it clips back into position.

• Raise the control panel.

Boiler installation sequence 4

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Vaillant ecoTEC plus 618 Specifications Page 23