ABB ACH400 Series Retrofit Manual page 14

Hvac drives. vertical electronic bypass to e-bypass, 1 - 25hp @ 208v, 1 - 50hp @ 480v (r1 ... r4 frame size drives)
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Mount the ACH550 into the mounting channel by hooking the bot-
tom mounting slots over the bolts and then tilting the top of the
drive back into the channel.
Lift the drive slightly to slip the top keyhole slots over the mount-
ing studs, and then lower the drive fully.
Place a nut loosely onto each of the two (2) studs.
After the drive is positioned , tighten all 4 mounting screws/nuts.
14

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