3DUpFitters Prusa i3 MK3S Installation Manual - Page 10

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The back should look like the illustration to the right

when you're ﬁnished.

4. Attach Right Side

The purpose of the vent on the right side is to bring

cooler air to the power supply to increase its longevity

under heavy use. With the fan and/or carbon ﬁlter in

place cold air will be drawn in through the power supply,

both cooling the power supply and heating the air as it

enters. Even without a fan, the power supply is still

cooler this way because one side is exposed to colder

air.

The right side panel is a little tricky to conﬁgure because

Prusa now has used two diﬀerent sizes of power supply.

The default layout is for silver power supply they've used

for years. Just make sure the cutout in the vent is on the

bottom half to ﬁt around the small bump at the bottom

1/3 of the supply.

If, however, your power supply is black, you've got one

of the new ones. In that case you'll want to run its

power supply cord through the black grommet in the

back of the enclosure.

You'll also notice a gap between the bottom of the power supply and the vent. This

can be plugged with a "Prusa gap ﬁller" piece, shown in white, which is included in the

kit.