Pressure Relief Valve; Connecting The Flue System To The Boiler; Electrical Connection; General Requirements - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

Fig. 4.10 Heating flow and return connection for ecoTEC pro
combination boiler
ecoTEC plus system boiler
• Insert a seal (1) and fit the service valves (2) to the
flow and return connection of the appliance.
• Fit a union nut (4) and a compression olive (3) to the
22 mm pre-bended copper tail (5) .
• Fully insert pipe (5) into the service valve. Tighten the
union nuts in this position.
Caution!
To ensure fumes do not escape through the syphon
of the boiler the trap must be filled with water
before the boiler is turned on. Therefore the dis-
charge pipework should be installed so as not to
interfere with the removal and refitting of the con-
densate 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.
Fig. 4.11 Heating-side flow and return connection for ecoTEC
plus system boiler
Instructions for installation and servicing ecoTEC / 839592_09
ba r
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Boiler installation sequence 4

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.

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
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