Pressure Relief Valve; Connecting The Flue System To The Boiler; Electrical Connection; General Requirements - Vaillant ecoTEC SERIES Instructions For Installation And Servicing

Caution!
To ensure fumes do not escape through the syphon
of the boiler the trap must be filled with water be-
fore the boiler is turned on. Therefore the discharge
pipework should be installed so as not to interfere
with the removal and refitting of the condensate
trap, we recommend the outlet pressure release
valve pipe supplied is not shortened. You must
leave a bottom clearance of at least 180 mm below
the condensate trap for removal and refitting.

4.12.2 Pressure Relief Valve

min.
180
Fig. 4.12 Installing the drain pipe on the pressure release valve
of the heating system (picture shows ecoTEC plus
combination boiler)
The pressure release valve for the heating system is
integrated in the appliance.
• Position the seal (1) and screw the drain pipe (2) on to
the pressure release valve.
The discharge pipework should be as short as possible
and installed with a continuous fall away from the boiler.
The pipe should terminate in a position which ensures
that any discharge of water or steam from the valve
cannot create a hazard to persons in or around the
premises, or cause damage to any electrical compo-
nents or external wiring, and the point of discharge
should be clearly visible.

4.13 Connecting the flue system to the boiler

• Refer to separate air/flue duct installation instructions
included with the boiler.
Instructions for installation and servicing ecoTEC 839592_12
Boiler installation sequence 4

4.14 Electrical connection

4.14.1

General requirements

Danger!
Electrocution caused by touching live parts can
be fatal.
Before working on the appliance, turn off the
power supply and secure against restart.
All electrical work shall be carried out by a competent
person and shall comply with BS 7671 (IEE Regulations). In
the Republic of Ireland, reference should be made to the
current edition of the ETCI (Electro-Technical Council for
Ireland) rules. The boiler is supplied for connection to
230 V, ~ 50 Hz supply fused at 3 A rating. Connection to
the mains supply shall be made via a fused 3 pin plug to
an unswitched shuttered socket, both complying with the
requirements of BS 1363. (Alternatively, connection may
be made via a 3 A fused double pole isolator having a
contact separation of at least 3 mm in all poles and
supplying the boiler and controls only). The point of
connection to the mains supply must allow complete
electrical isolation of the boiler and its ancillary controls.
It should be readily accessible and adjacent to the boiler.
A 3 core flexible cord according to BS 6500 Tables 6, 8
or 16 (3 x 0.75 to 3 x 1.5 mm
Danger!
1
This appliance must be earthed.
2
Danger!
Mains connection terminals L and N remain live
3
even when the boiler on/off control is switched
off.
Note
Do not connect any power voltage to the
connections 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
conductors become taut before the earth
conductor should the supply cord slip from the
cable clamp.
2
) should be used.
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