Case Front Panel
Fig. 73
Facia Panel Securing 
Screws
Inner Door
13.0 Servicing
13 .1 Annual Servicing
1.For reasons of safety and economy, it is recommended that the boiler is serviced annually. Servicing must be performed by a competent person in accordance with B.S.
If a suitably calibrated combustion analyser is available it may not be necessary to perform a full strip down of the appliance. Proceed as follows.
Check for/inspect:-
Evidence of leakage of products of combustion Water leaks
Heat stress
Deterioration such as corrosion
Visible condition of seals and joints
Flue system and ventilation
Condensate drain system
Operation at designed maximum heat input
If the above are satisfactory perform a combustion check The CO/CO2 ratio must be less than 0.004 and the CO2 should be 8.7% ± 0.2 (max. rate) and 8.4% ± 0.2 (min. rate). This can be adjusted - see Section 15.0 - if the readings are incorrect. When correct combustion readings cannot be achieved by adjustment a full strip down must be performed - see below. Carefully check items such as the burner, injector and heat exchanger for blockage or damage, rectifying as necessary. Re- check the combustion. Once satisfactory readings have been achieved and any other defects corrected complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication.
Where no suitable analyser is available a strip down service must be performed as described below.
2.After servicing, complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication.
If a full
3. Ensure that the boiler is cool. |
4. Ensure that both the gas and electrical supplies to the |
boiler are isolated. |
Panel
Fig. 74
Sump
Fig. 75
5. | Slacken the screws securing the facia panel. Lift the |
outercase panel so that its securing tabs are clear of the facia. | |
Remove the panel, allowing the facia to hinge down (Fig. 73). | |
6. | Remove the screws securing the inner door panel. Lift the |
panel slightly to disengage it from the studs on top of the case | |
(Fig. 74). | |
7. | Unscrew the sump from the bottom of the condensate trap |
assembly (Fig. 75). | |
8. | Remove any deposits from the sump and trap. Clean as |
necessary and replace the sump. | |
38© Baxi Heating UK Ltd 2008
