Servicing The Boiler - Potterton Promax SL Series Installation & Service Instructions Manual

For IE, it is necessary to complete a "Declaration of Conformity" to indicate compliance to I.S. 813. An example of this is
given in I.S. 813 "Domestic Gas Installations". This is in addition to the Benchmark Commissioning Checklist.
6. Instruct the user in the operation of the boiler controls. Hand over the User's Operating, Installation and Servicing Instructions,
giving advice on the necessity of regular servicing.
7. Demonstrate to the user the action required if a gas leak occurs or is suspected. Show them how to turn off the gas supply at the
meter control, and advise them not to operate electric light or power switched, and to ventilate the property.
8. Show the user the location of the system control isolation switch, and demonstrate its operation.
9. Advise the user that they may observe a plume of vapour from the flue terminal, and that it is part of the normal operation of the
boiler.
10. Complete the label supplied with the inhibitor and stick to the inside of the boiler case. Detail of system treatment must be
recorded in the Benchmark Commissioning Checklist.
page 41
14.0 Servicing the Boiler
14.1 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. 7967­4.
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 14.2.
The operational gas inlet pressure as described in Section
12.2.1 to 12.2.3 and the gas rate as described in 12.2.4.
The combustion performance as described in 'Check the
Combustion Performance' (14.1.4 to 14.1.6 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 BS­EN50379­3 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/CO
4.
Set the boiler to operate at maximum rate as described in
Section 12.2.
5.
Remove the cap from the flue sampling point, insert the
analyser probe and obtain the CO/CO
This must be less than 0.004.
6.
If the combustion reading (CO/CO
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 14.2) &
re­check.
Replace the gas valve (Section 15.8) & re­check.
page 42
14.2 Annual Servicing ­ Inspection
ratio)
2
ratio.
2
ratio) is greater than
2