Cooling Fans, Cooling Air Flow, And Minimum Clearance - Fortinet FortiGate-5144C Manual

FortiGate-5144C Chassis
The air filter should be inspected regularly. If dirty or damaged, the filter should be disposed of and replaced. The air
filter can be fragile and should be handled carefully.
To service the air filter you must loosen two the air filter frame retention screws at the bottom of the front of the chassis.
Tilt down the air filter frame and remove the air filter material.
Care should be taken when inserting an new air filter to prevent damage to the sensors. To insert a new filter, slide it
into the frame using the guides at each side of frame until the filter contacts springs at the back of the chassis. Then tilt
the frame up and tighten the retention screws.

Cooling fans, cooling air flow, and minimum clearance

The FortiGate-5144C chassis contains four hot-swappable cooling fans (fan 1 to fan 4) installed in the fan cabinet at the
top of the chassis. Two fans are access able from the front of the chassis and two from the back.
Fan tray locations (top view of chassis)
Back of Chassis
Fan 3 Fan 4
Fan 1 Fan 2
Front of Chassis
Front and back fan trays
Front Fan Tray
(Fan Trays 1 and 2)
To service the front fan trays (fan trays 1 and 2), open the front fan cabinet. The back fan trays (fan trays 3 and 4), are
accessible from the back of the chassis. The fan trays are hot swappable. You do not need to press a hot swap switch to
remove a fan. Just pull a fan out of the chassis and replace it. The shelf manager regulates the fan speed by adjusting
the DC voltage supplied to the fan trays.
FortiGate-5144C 6.2.3 Chassis Guide
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(Fan Trays 3 and 4)
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Back Fan Tray
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