Cleaning The Heat Exchanger - IDEAL HE15 Installation And Servicing

48 CLEANINg ThE CONDENsATE 's' TRAp & CONDENsATE pUMp (IF FITTED)
If condensate pump fitted refer to separate instructions for
cleaning procedure.
1. If a condensate pump is fitted, it must be removed and
pulled forward to gain access to the condensate 'S'
trap. Refer to Frame 69.
Note. Care must be taken with residual water when
removing the outlet pipe.
2. Remove the plastic union sealing nut on the bottom of
the condensate 'S' trap.
3. Remove and clean from the cartridge and ball any
residual deposits.
4. Inspect the opaque 'S' trap for further signs of dirt and
clean as necessary.
5. Replace the cartridge and ball and replace the plastic
sealing nut.
6. Replace the condensate pump.

49 CLEANINg ThE hEAT ExChANgER

1. Remove ignition and flame detection electrodes. Refer to
Frames 55 and 56.
2. Remove the 3 screws retaining the sump cover and remove.
3. Using a suitable tool clean the exposed heat exchanger fins
through the sump cover. Also vacuum any debris from the top
of the heat exchanger.
4. Remove any loose deposits from the sump.
5. Inspect the ignition and detection electrodes. Ensure that they
are clean and in good condition - replace if necessary.
6. Check the condition of the combustion chamber insulation
(HE15, 18 and 24 only). Any cracked or damaged pieces
must be replaced.
Note. Take care not to disturb the ionisation probes at the front
and rear of the combustion chamber.
7. Check that the ignition and detection gaps are correct. Refer
to Frames 55 and 56.
50 REAssEMBLy
Reassemble the boiler in the following order.
1. Refit the sump cover plate.
2. Refit the electrodes (check dimensions Frames
55 and 56).
3. Refit the burner.
4. Refit the fan / venturi assembly.
5. Reconnect the fan electrical leads.
34
Servicing
4
2
Sump cover
2
mexico hE24 shown
6. Refit the boiler sealing panel.
IMpORTANT.
Ensure the boiler sealing panel is correctly fitted and
that a good seal is made.
7. Refit the boiler front panels.
8. Turn on the gas supply at the gas service cock.
9. Reconnect the electrical supply.
3
Heat exchanger
3
mexico HE -
Installation & Servicing
Ionisation
probes