Vaillant ecoTEC plus 612, Instructions For Installation And Servicing

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Instructions for installation and servicing ecoTEC
4.9 Gas connection
Note
With the spacer frame (Art. No 308 650), the
pipes can be fitted vertically upwards behind
the appliance. The distance of the appliance
from the wall thus increases by 65 mm.
Danger!
The gas connection may only be made by a
competent person.
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.
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.
2
6
7
3
5
4
1
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 appli-
ances (
7 ).
• Fully insert the service valve ( 4 ) onto the gas connec-
tion 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 availa-
ble at the boiler inlet at full flow rate.
• Tighten all connections.
• Check the gas connection with leak indicator spray for
leakage.
4.10 Cold water mains inlet and hot water outlet
(ecoTEC combination boilers only)
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.
1
2
3
4
5
6
7
Fig. 4.6 Installing the hot and cold water connection (ecoTEC
plus combination boiler)
Boiler installation sequence 4