7 Commissioning
7.1
General
Follow the steps set out in the paragraphs below to put the boiler into op
eration.
Warning
Do not put the boiler into operation if the supplied gas is not in ac
cordance with the approved gas types.
7.2
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 quar
ter 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
The gas pressure measured on measurement point C is the gas
inlet pressure at the boiler connection point reduced by the re
sistance of the internal gas pipe. See Technical data, page 13
For authorised gas pressures, see: Unit categories, page 12
6. Vent the gas supply pipe by unscrewing the measuring point on the
gas valve unit.
7. Tighten the measuring point again when the pipe has been fully ven
ted.
8. Check all connections for gas tightness. The test pressure may be a
maximum of 60 mbar.
7.3
Hydraulic circuit
1. Check the siphon; it should be fully filled with clean water.
2. Check the water-side connections for tightness.
7.4
Electrical connections
1. Check the electrical connections.
7.5
Commissioning procedure
Warning
Initial commissioning must be done by a qualified professional.
If adapting to another gas type i.e. propane, the gas valve unit
must be adjusted before switching on the boiler.
See
Adjusting to a different gas type, page 44
Important
On first firing the boiler, a smell may be present for a short period.
1. Tilt the instrument box upwards again and fasten it using the clips lo
cated on the sides.
2. Open the main gas tap.
Fig.37
Gas valve unit measuring points
AD-0000066-01
C
C
7 Commissioning
123157 - v.12 - 07022018
43
