Ideal Heat Exchanger Sub Assembly Imax Xtra F80 174398

The heat exchanger sub assembly is the component that transfers heat from the combustion gases into the water circuit on Ideal Commercial Imax Xtra appliances. It is supplied by Ideal as a complete sub assembly for the Imax Xtra range, so the unit can be replaced as a single item rather than rebuilt from individual sections. The part carries the manufacturer code 174398 and is listed against the Imax Xtra F80 and E80 models.

• Reduced heating or hot water output that cannot be traced to burner, gas or control faults
• Kettling, banging or rumbling noises from the appliance during firing
• Water weeping or staining around the heat exchanger body or its connections
• Repeated overheat lockouts or high limit trips on the appliance
• Discoloured or dirty system water suggesting internal corrosion or a breach in the exchanger

• Confirm the appliance model and serial number against the compatibility list before ordering, as the Imax Xtra range uses more than one heat exchanger variant.
• Check the alternative number 1782164 against the marking on the existing part to confirm it is the correct replacement.
• Inspect the seals, gaskets and connections on removal and order replacements where they are disturbed during the swap.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.