Gas Connection; Cold Water Mains Inlet And Hot Water Outlet (Only 800 Series) - Vaillant ecoTEC PLUS SERIES Installation And Maintenance Manual

4.8

Gas connection

Note
With the balancing frame (Art. No 308 650),
the pipes can be laid in front of the wall
upwards behind the appliance. The distance of
the appliance from the wall thus increases by
65 mm.
Danger!
The gas installation may only be established by
an authorised technician.
The legal directives and the local regulations
for gas supply companies must be observed.
Caution!
Ensure a stress-relief assembly of the gas pipes
to avoid leakages!
Caution!
The gas regulating block may be tested for leak-
age only with a maximum pressure of 150 mbar!
Higher testing pressures can damage the gas
fitting.
Fig. 4.5 Fitting the gas connection (example ecoTEC plus, 800
series)
• Insert the union nut (2) and the pinching ring (3) on
the gas connection pipe (1) to the heater.
• Insert the union nut (6) and the pinching ring (5) on
the conduit arc provided with ecoTEC plus appliances
(7).
• Insert the maintenance tap (4) until the stopper on
the gas connection pipe and the conduit arc until the
stopper in the maintenance tap. Tighten both union
Installation and maintenance manual ecoTEC
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2
3
4
5
6
7
Boiler installation sequence 4
nuts in this position of the maintenance tap.
• The diameter of the conduit (7) is 15 mm. 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 availa-
ble at the boiler inlet at full flow rate.
• Tighten all connections.
• Check the gas connection with leak indicator spray for
leakage.
4.9 Cold water mains inlet and hot water outlet
(only 800 series)
Fig. 4.6 Installing the hot and cold water connection (ecoTEC
plus, 800 series)
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6
1
2
3
4
5
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