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bernard
20-03-2004, 05:42 PM
can anyone tell me why on hittachi air conditioning units onlt two of the phases are fused down at the unit:)

chemi-cool
20-03-2004, 06:23 PM
hi bernard,

it very simple, if the two phases trip from any reason, there is no curant on the third one so they save money on a single clickson.

but there is still 240V on that phase!

chemi

bernard
20-03-2004, 06:36 PM
Thankyou for your prompt reply. but why bother having any fuses on the actual unit, why not just rely on the 40 amp c/breaker on the consumer unit.

chemi-cool
20-03-2004, 06:48 PM
its all come down to money.

if they can save a littla screw, they will. the same with electrical components.

by the way, this method is used by compressor manufacturers for many years.

chemi

Bones
22-03-2004, 12:39 PM
why dont my R410a tourque spanners fit the flare nuts on the hitachi condensing units? they fit every other brand i have installed thus far...

sort of spun me out... just had to use the shifters instead, maybe i got a freaky unit or something... lol.