7 Commissioning
7.1 Checklist before commissioning
7.1.1 General
Follow the steps set out in the paragraphs below to put the boiler into
operation.
Warning
Do not put the boiler into operation if the supplied gas is not in
accordance with the approved gas types.
7.1.2 Gas circuit
Warning
Ensure that the boiler is disconnected from the power supply.
1. Open the main gas tap.
2. Open the boiler gas tap.
3. Unscrew the two screws located under the front housing by a quarter
turn and remove the front housing.
4. Tilt the instrument box forwards by opening the clips on the sides.
5. Check the gas inlet pressure at the measuring point C on the gas
valve unit.
Warning
For authorised gas pressures, see Unit categories, page 9
6. Vent the gas supply pipe by unscrewing measuring point C on the gas
valve unit.
7. Tighten the measuring point again when the pipe has been fully
vented.
8. Check all connections for gas tightness. The maximum allowable test
pressure is 60 mbar.
7.1.3 Hydraulic circuit
1. Check whether the automatic refill device, if present, is activated.
The automatic refill device is activated when parameter AP014 is
set to semi-automatic refill (1) or automatic refill (2).
2. Check the water pressure in the central heating system shown on the
boiler display. If necessary, top up the central heating system.
3. Check the siphon; it should be fully filled with clean water.
4. Check the water-side connections for tightness.
For more information, see
Refilling the system, page 111
7.1.4 Connections for the air and flue gas pipes
1. Check the flue gas outlet and air supply connections for tightness.
Fig.67 Gas valve unit measuring points
7 Commissioning
7686707 - v.01 - 06092018 AMC 69
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