Pressure Relief Valve - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

ecoTEC pro
Fig. 4.9 Heating flow and return connection for ecoTEC pro
• Insert a seal (1) and screw in the maintenance taps (2)
at the flow and return connection of the appliance.
• Insert a union nut (4) and a pinching ring (3) on the
two conduit elbows (5) with a diameter of 22 mm.
• Insert the conduit elbows until the stopper in the
maintenance taps. Tighten the union nuts in this posi-
tion.
ecoTEC plus, 600 series
Fig. 4.10 Heating-side flow and return connection for ecoTEC
plus, 600 series
• Insert a seal (1) and screw in the maintenance taps (2)
at the flow and return connection of the appliance.
• Insert a union nut (4) and a pinching ring (3) on both
conduit elbows (5). The diameter of the conduits is
22 mm.
Instructions for installation and servicing ecoTEC
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Boiler installation sequence 4
• Insert the conduit elbows until the stopper in the
maintenance taps. Tighten the union nuts in this posi-
tion.

4.10.2 Pressure Relief Valve

Fig. 4.11 Installing the drain pipe on the pressure release valve
of the heating system (picture shows ecoTEC 800
plus)
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 discharge pipework should be installed so as
not to interfere with the removal and refitting
of the condensate trap, we recommend the out-
let pressure release valve pipe supplied is not
shortened.
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 continuously away from the boiler. The pipe
should terminate in a position which ensures that any
discharge of water or steam from the valve cannot cre-
ate a hazard to persons in or around the premises, or
cause damage to any electrical components or external
wiring, and the point of discharge should be clearly visi-
ble.
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