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5. Start-up
C
64
5.2.2.
Gas circuit
WARNING
Ensure that the boiler is switched off.
1. Open the main gas supply.
2. Unscrew the two screws located under the front panel by a quarter
turn and remove the panel.
3. Tilt the control box forwards by opening the holding clips located
at the sides.
4. Check the gas supply pressure at the measurement point C on the
gas valve unit.
WARNING
¼ To ascertain the gas types permitted, see chapter:
"Gas categories", page 8
5. Check the tightness of the gas connections made after the gas
valve unit in the boiler.
6. Check the leak tightness of the gas inlet, including the gas
valves. The test pressure must not exceed 60 mbar.
7. Purge the gas supply pipe within the boiler by unscrewing the
measurement point on the gas block. Tighten the measurement
point when the pipe has been sufficiently purged.
8. Check the tightness of the gas connections in the boiler.
T001518-B
5.2.3.
Hydraulic circuit
4 Check the condensate discharge siphon; it must be filled with
clean water up to the mark.
4 Check that there are no leaks on the hydraulic connections.
5.2.4.
Electrical connections
4 Check the electrical connections.
MCA 15 - MCA 25 MCA 25/28 MI
29/04/2010 - 300022146-001-B
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