Technical information

76
To ensure that the five year guarantee applies, the following checks must be carried out once a year and the service
history completed in the Service Interval Record (Section 12, page 79) by a CORGI registered engineer:
1. Visually check the appliance for correct installation;
2. Check the appliance for the correct operation;
3. Check the flue and flue installation for correct siting, installation and that it is in good condition.;
4. Remove the casing as described in Section 7.2;
5. Check the operation of the safety devices:
- Air Pressure Switch;
- Overheat Thermostat;
- Safety Valve;
- Low Water Pressure Switch;
- Ionisation (Flame Detection);
6. Drain the boiler and check the pressure in the expansion vessel, ensuring it is 0.7 bar;
7. Remove, clean and refill the condensate trap and condensate hoses (see Section 7.3.6 and 7.3.7), check
the drain system for correct discharge of condensate and clean if necessary;
8. Remove and clean the DHW flow switch;
9. Remove and clean the fan;
10. Remove and clean the electrodes with an emery cloth;
11. Remov
e and clean the b
urner;
12. Chec
k and clean the pr
imary heat exchanger as necessary;
13. Refill the boiler and check the following;
14. Check all electronic operation parameters are correct (see Section 3.6);
15. Check gas inlet pressure and correct working pressure;
16. Chec
k the CO
2
(see Section 3.6.3)
and adjust as necessar
y;
17. Check the gas rate;
18. Check the correct operations of the timeclock and room thermostat;
19. Check the DHW flow rates;
20. Advise the customer on the correct use of the appliance (clock setting and operation, repressurising etc.);
21. Complete the necessary paperwork, Service Interval Record (page 79, Section 12) and Annual Maintenance
Checklist.
10. ANNUAL MAINTENANCE
CHECKLIST