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8.1. General
IMPOrTANT
DO NOT TAMPEr WITH THE APPLIANcE Or BrEAK ANY SEALS ON THE PrE-SET cONTrOLS
(BurNEr OFFSET PrESSurE AND THrOTTLE SETTINGS) OF THE APPLIANcE. IF IT IS
NEcESSArY TO rEPLAcE ANY OF THE SEALED PArTS, THEN THESE SHOuLD BE rEPLAcED
BY FAcTOrY SET AND SEALED PArTS SuPPLIED BY GLEDHILL LTD.
For reasons of safety and economy, it is recommended that the boiler is serviced annually.
Service must be carried out by a competent person who is also Corgi registered.
After servicing, complete the relevant Interval Record section of the Benchmark Commissioning
Checklist in this manual.
Measurement of the products of combustion can be achieved by connection of a probe to the
combustion analyser test point on the flue elbow connecting the boiler to the flue system.
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 isolation valve.
All routine service requirements can be achieved by the removal of the front cover, inner casing
panel and lower casing panel as described in section General 9.1. Unless stated otherwise parts
are replaced in the reverse order of removal. Servicing should always include the removal of any
debris from the condensate trap. After completing any servicing of gas carrying components
ALWAYS test for gas soundness and carry out a functional test of the controls.
It is recommended that all subsequent service calls are recorded on the Service Interval Record
section of the Benchmark Checklist in this manual.
Details from the Benchmark Checklist and Service Interval Record will be required when
requesting warranty work. Failure to provide these details or the lack of a current service will
delay a warranty visit and may incur a charge for the visit.
8.2. Spark & Flame sensing electrodes
For access refer to section 9.1 General.
Remove the spark plug style connector from the electrode and earth lead in the case of the
spark electrode. Remove the two retaining screws with a Torx T0 driver, carefully withdraw the
electrode from the combustion chamber. Inspect the tips for damage, clean away any debris
and check the spark gap is 3.5-4.5mm. Check the electrode gasket for signs of damage and
replace if necessary.
8.3. Burner
For access refer to section 9.1 General and 9.4 Burner Sub Assembly.
Clean the burner with a soft brush taking great care not to damage the front insulation. DO
NOT use wire or sharp instruments to clean the holes in the burner. Inspect the burner for any
signs of damage.
Removal of the burner is not necessary during a normal service.
NOTE: IF THE BurNEr HAS TO BE rEMOvED IT WILL rEQuIrE A NEW GASKET WHEN
rEFITTED.
When replacing the assembly ensure the sealing grommet is correctly fitted.
8.4. combustion chamber and Heat Exchanger
For access refer to section 9.1 General and 9.4 Burner Sub Assembly
Remove loose debris from the combustion chamber using a soft brush and vacuum cleaner.
Carefully flush any remaining debris by pouring water through to the condensate trap (ensuring
the water is kept away from electrical components).
ANNuAL SErvIcING
8.0
8.5. condensate Drain
For access refer to section 9.1
General
Remove the yellow cap from the
bottom of the trap and remove any
solids found. Remove the flexible
condense pipe connection from the
bottom of the heat exchanger and
the drain connection downstream
of the condense trap. Remove the
condensate trap and flush water
through the trap to remove any
remaining solids. Reassemble the
trap and connection ensuring a
watertight seal is achieved. Always
top up the trap seal before operating
the boiler.
8.6. Inner casing Panel Seal check
For access refer to section 9.1
General
Check the condition of the seal,
replace as required. To replace
remove the old seal, thoroughly clean
the casing surfaces. Fit the new seal, it
is supplied to the correct length.
8.7. combustion check
Once the appliance has been
reassembled (apart from the front
panel) connect a CO combustion
analyser to the test point on the flue
elbow. details of the acceptable CO
readings are shown in Technical Data
('Table .1' on Page 10)
8.8 DHW Filter/Flow regulator
The DHW filter is located in the
isolating valve located on the
i n c o m i n g c o l d w a t e r s u p p l y
underneath the hydraulic monoblock
compartment (nd from right). Shut
off the isolating valve by turning
the head anti clockwise and then
unscrew and remove the access plug
located at 90º to the isolating valve
head using a flat headed screwdriver.
Pull out the filter/flow regulator by
using a pair of pin nose pliers in the
cross bar provided.
Page 31
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