Cold Water Mains Inlet And Hot Water Outlet (Ecotec Combination Boilers Only) - Vaillant ecoTEC SERIES Instructions For Installation And Servicing

4 Boiler installation sequence
Fig. 4.5 Fitting the gas connection (example ecoTEC plus com-
bination boiler)
• Fit the union nut (2) and the compression olive (3) to
the gas connection pipe (1) of the boiler.
• Fit the union nut (6) and the compression olive (5) to
the pre-formed tail provided with ecoTEC plus
appliances (7).
• Fully insert the service valve (4) onto the gas
connection pipe and the pre-formed tail into the
service valve. Tighten both union nuts of the service
valve.
• The diameter of the pipework (7) is 15 mm (22 mm for
37kW models). Connect a gas supply pipe of not less
than 15 mm diameter to the copper tail.
Note
Ensure the gas supply pipework is adequately
sized so that a 20 mbar gas pressure is
available at the boiler inlet at full flow rate.
• Tighten all connections.
• Check the gas connection with leak indicator spray for
leakage.
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4.10 Cold water mains inlet and hot water outlet
(ecoTEC combination boilers only)
Fig. 4.6 Installing the hot and cold water connection
(ecoTEC plus combination boiler)
Fig. 4.7 Installing the hot and cold water connection
(ecoTEC pro combination boiler)
Caution!
When making final connection to the boiler, if
using soldered fittings, extra care should be
taken to avoid damage to isolation valves
through heat transfer.
Instructions for installation and servicing ecoTEC 839592_12
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