Fans inside computer cases tend to accumulate dust over longer
periods of usage. In order to maintain maximum performance, please
clean your fans regularly using a duster, slightly moist tissue or canned
air. Please be careful not to use too much force in order to prevent any
damage to the fan. Please don’t use a vacuum cleaner as this may apply
excessive force to the fan.
In order to ensure flawless operation over many years of usage, the
NF-A4x20 5V PWM’s premium grade SSO2 bearing is fully sealed to
prevent the entering of fine dust particles. Please note that the fan is
not designed to be taken apart by the user. Removing the impeller from
the frame will break the sealing of the bearing and results in a loss of
warranty.
Cleaning and Maintenance
If you replace an existing 40mm fan with the NF-A4x20 5V PWM in devices such as storage or network solutions, it is usually best to use the screws (or other
mounting mechanism) used for the original fan.
CAUTION:
Being a 5V PWM fan, the NF-A4x20 5V PWM can not be run at 12V and will be damaged when used with typical 12V power sources such as PC
mainboard fan headers.
When installing the NF-A4x20 5V PWM as a case fan, you can either use the supplied mounting screws or NA-AV3 silicone anti-vibration mounts. For installing
the fan using the NA-AV3 mounts, please first pull the F side through the fan’s mounting holes until pawl 4 is all the way through the hole.
Installation
Connection
OmniJoin adaptor
3M Skotchlok
TM
connectors
Connector of the original fan
GND
Make sure to correctly
identify the GND and
+5V leads of the
original fan!
After you’ve identified the individual leads, please proceed
with the following steps to install the OmniJoin adaptor:
Step 1
Cut off the connector of the fan that was originally used in the device.
Make sure not to cut the cable directly at the connector, there should be
least a 2-3 cm of cable left:
2-3cm minimum!
Step 3
Then use flat nose pliers to push down the white button of the
Skotchlok™ connector. Make sure that the button is not jammed and
pushed all the way down. If the button is jammed, push it down from
both sides of the Skotchlok™ connector using the flat nose pliers.
After you’ve fixed the original fan’s cable to the OmniJoin adaptor using
the Skotchlok™ connectors, simply connect the NF-A4x20 5V PWM to
the adaptor in order to use it in your device.
Repeat Step 2 and 3 for the +5V lead.
Step 2
Then take one of the supplied 3M Skotchlok™ connectors and insert
the GND lead of the original cable and the black lead of the OminJoin
adaptor into the two holes of the Skotchlok™ connector. Make sure that
both leads are fully inserted and pushed all the way back.
The OmniJoin adaptor uses black for ground (GND) and red for +5V.
The black lead of the adaptor has to be matched with the original GND
lead and the red adaptor cable with the or5V lead. Many fan
cables use the same colours as the OmniJoin adaptor, but please note
that there is no guarantee for this, so make sure to correctly identify the
GND and +5V leads of the original fan. Please refer to the manual that
came with the device or contact the device manufacturer if in doubt.
The NF-A4x20 5V PWM comes with a 4-pin PWM fan connector for PWM
based speed control. Please note that the fan can also be connected
to standard 3-pin fan headers though. When connected to 3-pin fan
headers, the NF-A4x20 5V PWM will run at full speed (unless voltage
based speed control is applied). If you would like to connect the fan
to other fan headers, please use the supplied OmniJoin adaptor set as
described below.
If you’re using multiple NF-A4x20 5V PWM fans, you can use the
supplied y-cable (NA-YC1) to connect several fans to one PWM fan
header. This way, all the connected fans will run at the same speed.
The NF-A4x20 5V PWM features a short 20cm primary cable in order
to help you minimise cable clutter in typical applications. If you need a
longer cable, please add the supplied 30cm extension (NA-EC1).
Using the OmniJoin adaptor set
The supplied OmniJoin adaptor set allows you to easily connect the
NF-A4x20 5V PWM to proprietary fan headers if you want to replace a
40mm fan in devices such as network or storage solutions.
Please first identify the individual leads of the OmniJoin adaptor and
the original fan.
Then pull the C side through the mounting holes of the case. If the long ends of the mounts are in the way, you can use scissors to cut them after installation.
Note that this will then make them difficult to reinstall in the future.
Warranty and Support
Even with high-grade products and strict quality control, the possibility of
defects cannot be eliminated entirely. Therefore, we aim at providing the
highest possible level of reliability and convenience by offering a warranty
period of 6 years and direct, fast and straightforward RMA service.
Should you encounter any problems with your NF-A4x20 5V PWM, please
don’t hesitate to contact our support team ([email protected]).
Caution: Only pull pawl 4 through the first hole.
Don’t overstretch the mounts by pulling further pawls through!
www.noctua.at
NF-A4x20 5V PWM | User Manual
+5V
