Filling The Hot Water Circuit; Checking The Gas Setting - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

◁
An automatic air vent function is activated if the
pressure exceeds 0.07 MPa (0.7 bar) for longer than
15 seconds.
9. Purge each radiator until the water escapes normally,
and then close the installation's purging valves.
10. Check whether all connections are leak-tight.
Condition: If the noise persists in the boiler
▶
Purge the product again by activating check programme
P.00.
Check programmes – Overview (→ Page 45)
9.8

Filling the hot water circuit

1. Open the taps to fill the hot water circuit.
2. Close the taps once the required volume of water has
flowed into the circuit.
◁
The hot water circuit is filled.
3. Check all connections and the entire system for leak-
tightness.
9.9

Checking the gas setting

Only a qualified competent person is authorised to imple-
ment the CO2 setting on the gas valve assembly.
Each destroyed seal must be replaced.
The CO₂ adjusting screw must be sealed.
Never modify the factory setting of the gas pressure regu-
lator of the gas valve assembly.
▶
Before you start up the product, compare the gas group
information on the data plate with the gas group available
at the installation site.
Condition: The product design is not compatible with the local gas group
Only Vaillant Service may perform a gas conversion.
If a gas conversion to liquefied petroleum gas has been car-
ried out, the smallest possible partial load is higher than is
shown on the display. The correct values can be found in the
Technical data in the appendix.
▶
Call Vaillant Service (0330 1003 143).
▶
Do not start up the product.
Condition: The product design is compatible with the local gas group
▶
Proceed as described below.
9.9.1 Checking the air/flue pipe/flue gas
recirculation
1. Check the flue gas installation is intact in accordance
with the latest gas safe technical bulletin and informa-
tion supplied in the installation instructions.
2. For extended flue gas installations check for flue gas
recirculation using the air analysis point.
3. Use a flue gas analyser.
4. If you discover unusual levels of CO or CO
ply air, search for the leak in the flue system or for signs
of flue gas recirculation.
5. Eliminate the damage properly.
6. Check again whether the supply air contains any un-
usual levels of CO or CO
7. If you cannot eliminate the damage, do not start up the
product.
30
in the sup-
2
.
2
9.9.2 Checking the gas flow rate
The gas flow rate has been set during production and does
not require adjustment. With the front casing fitted check the
gas flow rate of the boiler as follows:
▶
Start up the product with the check programme P.01.
▶
In addition, ensure that maximum heat can be dissipated
into the heating system by turning up the room thermo-
stat.
▶
Wait at least 5 minutes until the boiler has reached its
operating temperature.
▶
Ensure that all other gas appliances in the property are
turned off.
▶
Measure the gas flow rate at the gas meter.
▶
Compare the measured values with the corresponding
values in the table.
Qnw from
the data
Nom.
plate
24,4 2,58
28,5 3,02
34,6 3,66
Condition: Gas flow rate not in the permissible range
▶
Check all of the piping and ensure that the gas flow rates
are correct.
▶
Only put the product into operation once the gas flow
rates have been corrected.
Condition: Gas flow rate in the permissible range
▶
End the check programme P.01.
▶
Allow the boiler to cool down by allowing pump overrun to
operate for a minimum of 2 minutes.
▶
Record the boiler maximum gas flow rate onto the
Benchmark gas boiler commissioning checklist.
9.9.3 Checking the gas connection pressure (gas
flow pressure)
2
1. Ensure that the gas inlet working pressure can be
obtained with all other gas appliances in the property
working.
2. Close the gas stopcock (1).
3. Undo the sealing screw on the test nipple (2).
4. Connect a manometer to the test nipple (2).
5. Open the gas stopcock (1).
6. Start up the product with check programme P.01.
7. In addition, ensure that maximum heat can be dissip-
ated into the heating system by turning up the room
thermostat.
Installation and maintenance instructions ecoTEC sustain 0020253094_05
H gas in m³/h P gas in m³/h
+5% +5%
−10% Nom.
2,71 2,32 1,90 2,00
3,17 2,72 2,21 2,32
3,84 3,29 2,69 2,82
−10%
1,71
1,99
2,42
1