That seems to be dependant on whether you have the EA 897 Gen II (170kw) or Gen III (210kw)It's not just the dual fan you need to be looking for, the brochure says uprated dual fan! Does the saga continue ? LOL
Would appear all Gen II have a dual fan, Gen III have either a dual or single but from the docs I have it's not clear when/why a Gen III would have a signal fan. Or the wattage of the fan motors..
A parts catalogue would be helpful..
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