Vaillant ecoTEC plus Instructions For Installation And Servicing page 46

5 Commissioning Part I
ecoTEC appliance
ecoTEC plus
612/615/618/624/630
824/831
ecoTEC pro
24/28
ecoTEC plus
637/837
Table 5.2 Gas inlet working pressures at the reference test
point
> Should the pressure recorded at the reference test
point in the boiler be lower than indicated (Table 5.2)
check if there is any blockage in the pipework or if
the pipework is undersized.
> If the supply pressure is out of tolerance contact your
Emergency Service Provider.
If the gas inlet working pressure at the reference test
point (1) is not within the permissible range and you
cannot correct the failure, notify the gas supply
company or the Vaillant Service Solutions team and
proceed as follows:
> Take the boiler out of operation by
- Pressing the + and i buttons simultaneously and turn
down both thermostat control knobs.
- Only for combination boilers: Allow the boiler to cool
down by turning off water taps and allow pump over-
run to operate for a minimum of two minutes.
> Close the gas isolation valve of the boiler.
> Remove the pressure gauge and re-tighten the seal-
ing 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.
- Only for combination boilers: Allow the boiler to cool
down by turning off water taps and allow pump over-
run to operate for a minimum of two minutes.
> Close gas isolation valve of the boiler.
> Remove the pressure gauge and re-tighten the seal-
ing 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.
46
Natural gas (G20)
Minimum pressure at Maximum pressure at
reference test point in reference test point in
(mbar) hPa
16
15
Minimum pressure at
reference test point in
(mbar) hPa (mbar) hPa
23
23
> Reset boiler controls for normal operation.
> Record the appliance gas inlet working pressure
(mbar) hPa in the Benchmark gas boiler commission-
ing checklist.
Instructions for installation and servicing ecoTEC 839592_13
LPG (G31)
Maximum pressure at
reference test point in
(mbar) hPa
32 43
32 43