13.0 Servicing

Case Front Panel

Fig. 69

Facia Panel Securing

Screws

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. 7967-4.

2.After servicing, complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication.

IMPORTANT: During routine servicing, and after any maintenance or change of part of the combustion circuit, the following must be checked:-

•The integrity of the complete flue system and the flue seals.

•The integrity of the boiler combustion circuit and relevant seals as described in Section 13.2.

•The operational gas inlet pressure as described in Section 11.2.1 to 11.2.7 and the gas rate as described in 11.2.8.

•The combustion performance as described in ‘Check the Combustion Performance’ (13.1.4 to 13.1.6 below).

3.Competence to carry out Checking Combustion Performance

B.S. 6798 ‘Specification for Installation & Maintenance of Gas Fired Boilers not exceeding 70kW’ advises that:-

•The person carrying out a combustion measurement should have been assessed as competent in the use of a flue gas analyser and the interpretation of the results.

•The flue gas analyser used should be one meeting the requirements of BS7927 or BS-EN50379-3 and be calibrated in accordance with the analyser manufacturers’ requirements.

•Competence can be demonstrated by satisfactory completion of the CPA1 ACS assessment, which covers the use of electronic portable combustion gas analysers in accordance with BS 7967, Parts 1 to 4.

Check the Combustion Performance (CO/CO2 ratio)

4.Set the boiler to operate at maximum rate as described in Section 15.1.1 to 15.1.6.

5.Remove the plug from the flue sampling point, insert the analyser probe and obtain the CO/CO2 ratio. This must be less than 0.004.

6.If the combustion reading (CO/CO2 ratio) is greater than this, and the integrity of the complete flue system and combustion circuit seals has been verified, and the inlet gas pressure and gas rate are satisfactory either:

• Perform the ‘Annual Servicing - Inspection’ (Section 13.2) & re-check

• Adjust the gas valve (Section 15.0) & re-check

• Replace the gas valve (Section 14.24) & re-check

Inner Door

 

13.2

Annual Servicing - Inspection

Fig. 70

 

 

Panel

1. Ensure that the boiler is cool.

 

 

 

2. Ensure that both the gas and electrical supplies to the

 

 

boiler are isolated.

 

 

3. 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. 69).

 

 

4. Remove the screws securing the inner door panel. Lift the

 

 

panel slightly to disengage it from the studs on top of the case

 

 

(Fig. 70).

 

 

 

Sump

 

 

 

5. Unscrew the sump from the bottom of the condensate trap

 

 

assembly (Fig. 71) and remove any deposits from the sump and

 

 

trap. Clean as necessary and replace the sump.

 

 

Fig. 71

 

40© Baxi Heating UK Ltd 2012

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Baxi Potterton 47-393-40, 47-393-39, 47-393-41, 47-393-42 manual 13 .1 Annual Servicing, Annual Servicing Inspection
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47-393-40, 47-393-41, 47-393-39, 47-393-42 specifications

The Baxi Potterton 47-393-42, 47-393-39, 47-393-41, and 47-393-40 are models of high-efficiency gas boilers designed for residential heating. These models are well-known for their reliability, advanced technology, and user-friendly features, making them a popular choice among homeowners looking to improve their heating systems.

One of the standout features of these models is their energy efficiency. Each unit is engineered to comply with stringent energy-saving regulations, significantly reducing utility bills while maintaining optimal heating performance. They are rated with impressive efficiency ratings, which can lead to long-term savings and a reduced carbon footprint.

The Baxi Potterton range employs a heat exchanger system designed to maximize heat transfer and minimize energy waste. This sophisticated technology ensures that the boiler operates at peak efficiency, providing ample heating for homes even in the coldest months. The use of a durable, high-quality heat exchanger material contributes to the longevity of the unit, reducing the need for frequent repairs or replacements.

Ease of use is another hallmark of the 47-393 series. With an intuitive digital display, users can effortlessly monitor and adjust settings as required. The controls are straightforward, allowing for quick temperature adjustments, system diagnostics, and alerts, creating a hassle-free experience for homeowners.

Safety features are inherent in these models, including built-in safeguards against overheating and pressure fluctuations. The automatic shut-off mechanism ensures that the boiler operates within safe parameters, providing peace of mind to users.

Furthermore, maintenance is simplified with the easy access design. The accessible components make it straightforward for service technicians to perform routine checks and repairs. Regular maintenance is essential for sustaining high performance and extending the lifespan of the boiler.

In conclusion, the Baxi Potterton 47-393-42, 47-393-39, 47-393-41, and 47-393-40 models represent a blend of efficiency, safety, and convenience. Their advanced technologies and features not only enhance the user experience but also contribute to more sustainable heating solutions for homes. Investing in one of these advanced boilers ensures reliable performance, lower energy costs, and a commitment to environmental responsibility.
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