page no. 56 of 68
LX Range Users, Installation & Servicing Instructions Doc Ref M110 issue 1.0 Dec 2020.
2.7 Servicing
3. Disconnect the fan leads from the electrical terminals.
4. Withdraw cable through entry grommet.
5. Remove the fan and motor assembly complete by
removing the hexagon headed screws that secure the fan
to the rear panel.
6. Reassemble in reverse order.
2.7.6.2. Centrifugal Fan/Silencer
Section
1. Remove section side panel(s) and inspect the fan blades
for any damage or excessive buildup of deposits that
could give rise to an imbalance. Remove the assembly for
cleaning as follows.
2. Slacken the cable gland on the casing through which
the fan electrical cable passes.
3. Disconnect the fan leads from the electrical terminals
in the contactor enclosure.
4. Withdraw cable through entry grommet.
5. Remove the complete fan assembly by removing the
fixings securing the fan to the base rails.
6. Reassemble in reverse order.
2.7.7. Replacement of Faulty
Components
Only parts supplied via or authorised by Powrmatic
should be used. A short list of parts and part numbers are
detailed in section 3.2 of this manual. If in doubt, please
contact Powrmatic.
2.7.7.1 Gas Valve
1. Ensure that the gas service valve is turned OFF. If
a flexible gas connection has been used go to step 2
otherwise unscrew the union nut situated immediately
downstream of the gas service valve.
2. Remove the electrical plug connections from the top of
the gas valve.
3. Release the flanged connections at the inlet and outlet
of the gas valve and remove.
4. Reconnect the new valve in the reverse order to that
above ensuring that the valve is correctly orientated.
Renew the sealing 'O' rings if necessary.
2.7.7.2. Burners
1. Remove the burner assembly as described in Section
2.7.2.
2. Remove the end plates of the burner assembly and the
central burner support plate.
3. Exchange burners as required and reassemble
components in reverse order.
4. Re-commission the appliance as described in Section
2.6.
2.7.7.3. Electrode Assemblies
The spark electrode is located at the bottom of the burner
section, the rectification probe at the top.
1. Disconnect the electrode leads from the control box as
appropriate.
2. Remove the screw securing the electrode assembly
to the burner assembly side plate and withdraw the
assembly.
3. Fit replacement and reassemble in reverse order.
Check that the spark gap is 2.5mm (See section 2.7.3) and
the rectification electrode is 10 - 12mm forward of the
burner.
2.7.7.4. Limit Thermostat
NB. Ensure that the thermostats are set correctly before
fitment.
Limit Thermostat settings:-
LX15-30 = 90°C
LX35 = 110-120°C
LX40-140 = 90°C
1. Remove the screws securing the thermostat phial
mounting plate to the inner bulkhead*, withdraw
assembly and unclip the phial.
2. Remove the electrical connections from the limit
thermostat.
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