Specifications

Hardware Reference 33
C613-03020-00 REV N
Fans and Filters on the Rapier 48w
and 48w-B
The Rapier 48w and 48w-B have two fan-only modules (FOMs) located on the
front. For NEBS compliance, Rapier 48w and 48w-B DC models are supplied
with two air filters that you must install into each FOM, and should be changed
periodically. The efficiency period of the air filter will depend on the air quality
in which the switch is operated, but for a normal office environment, we
recommend replacing the air filters every 3 months.
The following procedures describe how to replace FOMs and air filters.
Replacement FOMs (part number AT-FAN-04) and air filters must be
purchased separately from your authorised Allied Telesis distributor or
reseller.
You do not need to power down the switch to change a FOM or air filter, but
you should replace them one at a time.
Before you begin
■ Read the safety information for the switch.
Safety information is available in the Rapier 48w Switch Installation and Safety
Guide bundled with every Rapier 48w and 48w-B switch. You can also
download this document from www.alliedtelesis.com/support/software.
■ Gather necessary tools and equipment.
You will need a flat screwdriver to adjust the captive screws on the FOM.
We recommend installing new air filters when you replace a FOM.
To replace a FOM
1. Unpack the fan-only module.
Warning Follow correct anti-static procedures when installing a FOM.
Failure to do so could damage the FOM or the switch. If you are unsure
about correct procedures, contact your authorised distributor or reseller.
While observing Electrostatic Discharge (ESD) precautions, remove the
FOM from its packing material in an anti-static environment.
2. Remove the current fan-only module from the switch.
Using a flat screwdriver, loosen the captive screws on the faceplate of the
FOM, and slide the FOM out of its cage. The internal power connection is
quite solid so pull firmly on the captive screws.