Technical data

18
Fig. 17
To ensure efficient operation of the boiler it is recommended that it is checked and serviced as necessary at regular intervals.
The frequency of servicing will depend upon the particular installation conditions and usage, but in general once per year
should be adequate.
It is the law that any service work must be carried out by a competent person, ie CORGI registered personnel.
Warning: Before servicing the boiler, isolate the electrical supply and close the boiler gas service cock. Allow the boiler to cool.
The data label is positioned on the inside of the left hand side panel.
Always test for gas soundness after servicing any gas carrying components.
7.1 IMPORTANT NOTES PRIOR TO SERVICING
1. Check the flue terminal outside and ensure it is not blocked.
2. Run the boiler and check the operation of its controls.
3. Refer to Fig. 2 for location of flue sampling point.
4. Ensure that all system connections and fittings are sound. Remake any joints and check the tightness of any fittings that
may be leaking.
5. It is recommended that the operation of the safety valve is checked by turning the head anti-clockwise until it clicks. The
click is the safety valve lifting off its seat allowing water to escape from the system - check that this is actually happening.
6. Refill, vent and re-pressurise the system as necessary. (Refer to Commissioning, section 5.1).
If the system pressure exceeds 2.5 bar when operating at maximum temperature, the heating expansion vessel should be
checked and re-pressurised, if necessary.
Note: 1. Check the expansion vessel charge only when the system pressure is zero.
2. The expansion vessel pressure test point is accessible from the top and rear of the boiler.
7. Record details of the service in the Service History section on page 31 of this manual and in the Benchmark Log Book.
7.2 PREPARE FOR SERVICING - Fig. 17
1. Ensure the electrical supply is isolated and the gas supply is off.
2. Unscrew the two screws securing the control panel and lower the panel.
3. Lift the case front panel upwards slightly and pull it forwards to remove it from the boiler.
4. Remove the four screws securing the room sealed chamber panel and remove the panel, taking care not to damage the seal.
5. Remove the four screws securing the combustion chamber front cover and remove the cover.
6. Disconnect the electrode leads from the electrodes and the in-line connector to the flame sensing electrode.
7. Remove the four screws securing the burner and withdraw it out of the boiler. Take care not to damage the side insulation
panels.
Alpha SY9-24 - Routine Servicing
7 ROUTINE SERVICING