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Central Heating & Storage Heaters Forum
Fuse rating in heating FCU
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<blockquote data-quote="Doc Hudson" data-source="post: 238789" data-attributes="member: 1607"><p>Welcome to the forum as a poster Stoff. As Provdave points out it is the regulation that says you must follow manufactures instructions that would define the rating of fuse fitted in any FCU to any fixed appliance. Some boilers have their own internal fuses protecting their internal PCB's, older non electronic traditional heating system probably rely on the FCU fuse for protection to the whole system. 3A or 5A are the sizes typically encountered to my understanding.</p><p></p><p>Doc H.</p></blockquote><p></p>
[QUOTE="Doc Hudson, post: 238789, member: 1607"] Welcome to the forum as a poster Stoff. As Provdave points out it is the regulation that says you must follow manufactures instructions that would define the rating of fuse fitted in any FCU to any fixed appliance. Some boilers have their own internal fuses protecting their internal PCB's, older non electronic traditional heating system probably rely on the FCU fuse for protection to the whole system. 3A or 5A are the sizes typically encountered to my understanding. Doc H. [/QUOTE]
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