Ideal Heat Exchanger HIU 30 Plate 177632

The Ideal 177632 is a 30-plate heat exchanger used in the hot water interface unit (HIU) of Ideal Commercial appliances. It sits between the primary heating circuit and the domestic hot water circuit, transferring heat across a stack of stainless plates to produce hot water on demand. As a plate-type unit it packs a large surface area into a compact body, which suits the space restrictions inside an HIU.

• Domestic hot water runs hot then cold, or never reaches temperature, as plate channels scale or block
• Reduced hot water flow rate at the tap compared with the appliance's normal output
• Water weeping or dripping from the plate stack or its gasket edges
• Poor heat transfer between primary and domestic circuits, with the primary running hot but the hot water staying lukewarm
• Loss of primary circuit pressure traced to the heat exchanger body

• Confirm the appliance model and serial number against the compatibility list before ordering
• Check the number stamped or labelled on the existing heat exchanger, as 1180501 is also used to identify this item
• Check whether new gaskets or seals are needed when refitting the plate stack
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.