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The Vaillant ecoTEC exclusive is set in the factory to a
nominal water quantity of 11.6 l/min. (38 kW unit) and
9.8 l/min. (32 kW unit).
5.4
Heating connection
Fig. 5.3 Heating connection
a
Caution!
Mount the heating lines so they are tension-
free, this prevents leaks!
Before connecting the heating circuit to the boiler, all
pipework and radiators must be thoroughly flushed to
remove any installation debris.
• Connect the central heating flow and return service
valves to the appliance.
• Connect the 22 mm copper pipe tails to the service
valves as shown in the illustration and tighten the nuts.
• Connect the central heating pipework to the flow and
return tails.
Two additional tubes are supplied with the appliance for
top connection of the flow and return pipework within
the casing.
5.5
Pressure Relief Valve
ecoTEC exclusive installation and maintenance instructions / 0020017768_02
Fig. 5.4 Fitting the pressure relief valve
The pressure relief valve and filling loop connection is
provided within the boiler cardboard box and should be
assembled as shown below.
• Remove plug from connection.
• Fit and install the complete unit "pressure relief valve,
filling valve and flexible connection" to the connec-
tion.
• Connect the corrugated hose to the double check
valve.
• Connect the discharge pipe to the pressure relief
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 about the
premises, or cause damage to any electrical compo-
nents or external wiring,and the point of discharge
should be clearly visible.
Installation 5
13
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