Cleaning The Heat Exchanger - IDEAL HE24 Installation And Servicing

47 CLEANING THE CONDENSATE 'S' TRAP
1. Swing the control box down into the
servicing position. Refer to Frame 44.
2. Disconnect the condensate drain pipe.
3. Remove the screw and elongated bolt,
pull the trap down and forward to
remove.
4. Flush out any deposits with clean
water.

48 CLEANING THE HEAT EXCHANGER

1. Remove ignition and flame detection electrodes.
Refer to Frames 56 & 57.
2. Remove the 3 screws retaining the sump cover and
remove.
3. Using a suitable tool as supplied in the standard
British Gas Flue brush kit, clean between the heat
exchanger fins from the top of the heat exchanger.
4. Access to the base of the heat exchanger is now
possible. Brush clean any deposits from the base of
the heat exchanger and 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. Any cracked or damaged pieces should
be replaced.
7. Check that the ignition and detection gaps are
correct. Refer to Frames 56 & 57.
Note. Take care not to disturb the detection earth probe
at the rear of the combustion chamber.
49 REASSEMBLY
Reassemble the boiler in the following order:
1. Refit the condensate 'S' trap, ensuring that it is full of water.
2. Refit the sump cover.
3. Refit the electrodes. (Check dimensions; Frames 56 & 57).
4. Refit the burner.
5. Refit the fan / venturi assembly.
6. Reconnect the fan electrical lead.
34
SERVICING
7. Refit the boiler sealing panel.
IMPORTANT.
Ensure that the boiler sealing panel is correctly fitted and
that a good seal is made.
8. Swing the control box back into its working position and
secure.
9. Refit the display unit.
10. Refit the boiler front and bottom panels.
11. Turn on the gas supply at the gas service cock.
12. Reconnect the electrical supply.
isar -
Installation and Servicing