22
Fig. 25
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, i.e. 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.
Always carry out electrical system checks i.e. Eart Continuity, Resistance to Earth, Short Circuit and Polarity with a suitable
meter after servicing.
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.
Check that the condensate trap drain pipe is connected and all joints are sound.
8.
Record details of the service in the Service History Section on back page of this manual.
Alpha CD18S/24S/30S - Routine Servicing
7
ROUTINE SERVICING
Room sealed panel
fixing screws
Six nuts and washers
securing combustion
chamber front
assembly
Gas pipe
union
Pressure tube
connections
Fan assembly
fixing screws
Ignition generator
Fan
assembly
Combustion
chamber front
assembly
Viewing
window
Condensate
trap
Summary of Contents for Alpha CD18S
Page 29: ...29 9 1 ILLUSTRATED WIRING DIAGRAM Alpha CD18S 24S 30S Wiring Diagrams 9 WIRING DIAGRAMS ...
Page 30: ...30 Alpha CD18S 24S 30S Wiring Diagrams 9 2 FUNCTIONAL FLOW WIRING DIAGRAM ...
Page 32: ...32 10 2 FAULT FINDING SOLUTIONS A to E Alpha CD18S 24S 30S Fault Finding ...
Page 33: ...33 Alpha CD18S 24S 30S Fault Finding 10 3 FAULT FINDING SOLUTIONS F to K ...
