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Installation and maintenance instructions ecoTEC 0020029173_01
• Remove the pressure gauge and re-tighten the sealing
screw (
1
).
• Turn on gas at the gas isolation valve.
• Make sure that there is no leakage at the sealing
screw.
• Turn off gas at the gas isolation valve.
• Put the front casing back on.
• Turn off electrical supply to the boiler.
• You must not start up the boiler.
If the gas inlet working pressure is within the
permissible range, proceed as follows:
• Take the boiler out of operation by
- Pressing the + and i buttons simultaneously and
turn down both thermostat control knobs.
• Close the gas isolation valve of the boiler.
• Remove the pressure gauge and re-tighten the sealing
screw (
1
).
• Open the gas isolation valve of the boiler.
• Make sure that there is no leakage at the sealing
screw.
• Put the front casing back on.
• Reset boiler controls for normal operation.
• Record the appliance gas inlet working pressure
(mbar) in the Benchmark gas boiler commissioning
checklist.
6.4
Checking the appliance function
If the installation is complete and the gas setting has
been checked, perform a function check before starting
up the boiler and handing it over to the operator.
• Commission the boiler in accordance with the
instructions in the relevant operating manual.
• Check the tightness of the gas supply line, flue gas
installation, heating installation and hot water pipes.
• Check the flue pipe for proper installation.
• Make absolutely sure that the front casing is properly
closed.
• Check the function of the heating (see Chap. 6.4.1)
and hot water generation (see Chap. 6.4.2)
• Hand over the boiler to the user.
The Vaillant ecoTEC displays status codes to indicate
the operating condition of the boiler. You can perform a
function check based on these status codes by pressing
the "i" button.
Fig. 6.6 Tightness check
6.4.1 Heating
• Switch on the boiler.
• Make sure that heat is being requested.
• Push "
i
" to activate the status indicator.
As soon as there is a heat demand, the boiler goes
through the status displays "
S. 1
" to "
S. 3
", until the
boiler is running properly in normal operation and the
display "
S. 4
" appears.
Fig. 6.7 Display during heating mode
Start-up 6
