Capital Plumbing Ltd and Heating Services ltd are suitably Gas Safe Registered to service a whole host of gas appliances from boilers, fires, cookers and hobs. These services will be unlike many other companies carried out as per the Manufacturers Servicing Instructions this will always take 1 hour or more to perform correctly

Please don’t be fooled by companies offering Health Checks and other services disguised as Manufacturers Servicing. If it’s too good to be true it normally is and all that they are offering is a flue gas analysis result, a 10 minute operation often without the boiler casing being removed, then you have to pay extra to get normal servicing actions completed and any problems put right.

See typical service example below

We at Capital Plumbing and Heating Services ltd understand how regular servicing can prolong the life of the gas appliance buy up to 100%. But we also understand that it can save a life, last year in the UK over 50 people lost their lives to carbon monoxide poisoning and as an extra safety service our Boiler Servicing Engineers will also carry out a Free room and if necessary a Free void carbon monoxide analysis to ensure our customers safety.

Your Manufacturers 1-2-year guarantee

We will only use quality manufacturers products sourced from quality suppliers with good returns policies and good warranty timescale normally 12 months but in some cases we have been able to negotiate 24 month guarantee on parts for our customers. In the case of warranty issues with any such part of the system we promise to remove and replace that part and seek reimbursement from the manufacturers thus impacting as little as possible on our customers.

Your Capital Plumbing Ltd & Heating Services Ltd 2-year labour warranty.

we always provide our industry leading 2 year labour warranty to all of our customers so that they can rest assured, that if a problem does arise our service and delivery are second to none this is illustrated through and backed by the assurance that you are using one of Checkatrade highest ranking businesses in the southeast.

The servicing procedure of a Glow-worm Flexicom hx for example only

IMPORTANT NOTES:

• 1. To ensure the continued efficient and safe operation of the boiler it is recommended that it is checked and serviced at regular intervals. The frequency of servicing will depend upon the particular installation and usage, but in general once a year should be enough.


• 2. It is the Law that any servicing is carried out by a competent person.


• 3. Before commencing with a service or replacement of parts the boiler should be isolated from the electrical supply and the gas supply should be turned off at the gas service isolation valve.


• 4. When replacing a part on this appliance, use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Glow-worm.


• 5. If any electrical connections have been disconnected and after their connection, checks to the earth continuity, polarity, short circuit and resistance to earth must be repeated using a suitable multimeter, as described in section 14.


• 6. On completion the “Benchmark” Service Record should be completed.

13.1 General Inspection

Before servicing the appliance inspect the following and then carry out the functional checks:

• 1. Condition of case and flue.
• 2. Flue terminal for obstructions.
• 3. Electrical supply connections.
• 4. Water connections.
• 5. Gas connection.
• 6. System pressure.
• 7. correct any fault before continuing

13.2 Functional Checks

With the appliance operational carry out the following: COMBUSTION CHECK - with a flue gas analyser as described in section 13.9. GAS RATE CHECK - the gas rates, refer to section 1 2.4. If the gas rate requires adjustment you MUST NOT adjust the gas valve without a gas analyser, refer to section 13.9. If you cannot measure the gas rate it is acceptable to measure the combustion rate as described in section 13.9, however, if you do not have either facility then the appliance MUST be turned off and disconnected until such equipment is available. If the Combustion and Gas rate checks did not require adjustment then it will not be necessary to service the Combustion Chamber, Burner, Heat Exchanger or Spark Electrode, proceed to section 13.11 . If the combustion or gas rate requires adjustment you must complete the servicing as described in sections 13.3 to 13.8, then repeat the functional checks before proceeding to section 13.11 to complete the servicing

13.3 Servicing the Appliance

On completion of paragraphs 13.1 and 13.2, proceed with the following. All routine servicing requirements can be achieved by the removal of the front panel, see diagram 13.1. Before commencing with a service or replacement of parts the boiler should be isolated from the electrical and gas supplies, see diagram 13.2 for the position of the gas service isolation valve.

13.4 Spark Electrode NOTE: If the functional checks did not indicate poor combustion then it is not necessary to service this component.

Ease the securing clips away from the sump to release the retaining catch then push the flue hood up to disengage from the sump, see diagram 13.3. To remove, swivel flue hood 90o and pull down and out, see diagram 13.3. Check seal for wear or damage and replace if necessary. IMPORTANT: Do not allow fixings, nuts, screws, etc. to fall into the open flue hood sump, use a temporary cover whilst removing any parts. Disconnect the spark electrode plug and earth lead. Remove the two securing screws and withdraw the spark electrode carefully from the combustion chamber, see diagram 13.4. Inspect the tips for damage. Clean away any debris and check the spark gap is 4mm. Check the electrode gasket for signs of damage and replace if necessary.

13.5 Burner NOTE: If the functional checks did not indicate poor combustion then it is not necessary to service this component.

Disconnect the gas supply at the gas valve and electrical connections, see diagram 13.5. The Silencer (front) is a push fit, so there is no need for tools to remove or fit, see diagram 13.6. Release the igniter unit support bracket, see diagram 13.7. Remove the fan retaining bracket. To ease removal of the securing nut from the fan retaining bracket, a flat bladed screwdriver can be used in the position shown and gently levered down as indicated, see diagram 13.8. Remove the fan and gas valve assembly. The silencer (rear) is a push fit so no tools are required for its removal or fitting, see diagram 13.9. Check the spark electrode gap is 4mm. Clean and adjust as necessary, see diagram 13.4. It should not be necessary to remove the spark electrode from the burner during servicing. Remove the flanged nuts and studs that secure the burner, note that two studs at the rear also hold the fan clamping bracket, see diagram 13.10. Clean the burner with a soft brush taking great care not to damage the surface of the burner. DO NOT use wire or sharp instruments to clean the mesh of the burner. NOTE: The burner gasket should be inspected but will not need replacing unless there are signs of wear or damage. Follow the tightening sequence when re-fitting the burner, see diagram 13.10.

13.6 Heat Exchanger

NOTE: If the functional checks did not indicate poor combustion then it is not necessary to service this component.

Remove loose debris from inside the heat exchanger using a soft brush and vacuum cleaner. Carefully flush by spraying water into the heat exchanger, any remaining debris should pass through the condensate trap (Ensure the water is kept away from electrical components).

13.7 Condense Trap and Siphonic Drain

The condensate trap and siphonic drain does not normally need servicing unless material deposits exceed beyond the service fill level, see diagram 13.11. To clean the condense trap remove the sump and rinse with water.

13.8 Casing panel seal check

NOTE: If the functional checks did not indicate poor combustion then it is not necessary to service this component.

Check the condition of the seal and replace if worn or damaged. To replace remove the old seal and thoroughly clean the casing surfaces. Fit the new seals, these are supplied to the correct lengths and are in four pieces, for use on the sides, top and bottom.

13.9 Combustion Check

With the appliance operational connect the CO2 combustion analyser to the flue elbow test point or if direct rear flue fitted, the test point shown in diagram 13.12.

IMPORTANT:Remember to replace the cap on completion of the test. A competent person only should carry out any adjustment to the gas valve, refer to diagram 13.13.

Monitor the combustion reading and at max rate the reading should be 9.3% ± 0.5.

Check the burner %CO2 at maximum rate (open a hot water tap fully) is as shown in the “CHECK” column of the table and if the reading falls within the tolerance, disconnect the analyser, fit the test point cap and return to functional checks - gas rate. If adjustment is required remove the front casing panel, see diagram 13.1. Taking care not to touch any internal components, proceed as follows: Press the “reset” button on the controls fascia, release and immediately press and hold in the “+” button. After approximately 5 seconds “Hi” will be displayed. Pressing the mode button when “Hi” is selected will force the boiler to maximum rate, the display will flash between “Hi” and the “default display” this will indicate the boiler has been forced to maximum. Adjust the maximum rate CO2 with the throttle to 9.3%. (Rotate anti-clockwise to increase). To exit the check sequences press the “mode” and “+” buttons simultaneously, this will reset the boiler to the default display.

Monitor the combustion reading and at min rate the reading should be 9.3% ± 0.5.

If adjustment proves necessary then proceed as follows: Press the “reset” button on the controls fascia, release and immediately press and hold in the “+” button. After approximately 5 seconds “Hi” will be displayed. Pressing the “+” or “-” buttons will cycle between “Hi” and “Lo”. Pressing the mode button when “Lo” is selected will force the boiler to minimum rate, the display will flash between “Lo” and the “default display” this will indicate the boiler has been forced to minimum. Refer to diagram 13.13, remove the offset screw cover. Adjustment of the CO2 at minimum rate is very coarse so carefully adjust the CO2 with the offset adjustment to 9.3%. (Rotate clockwise to increase). Refit the offset cover and the cap on the test point. To exit the check sequences press the “mode” and “+” button simultaneously; this will reset the boiler to the default display. NOTE: Check the casing panel is fitted correctly giving an air tight seal.

13.10 Gas Rate Adjustment

This appliance incorporates a pre-mix burner. The gas rate should be correct if the combustion measured in section 13.9 is correct.

13.11 Service Completion

On completion of the service the “Benchmark” Service Record should be completed.