Aerox 4110-725 SERIES Operating Instructions And Equipment Limitations Download Page 2

MSKAEMD:UM 09/06/17 

DESCRIPTION 

The 4110-725 Series, quick donning, diluter demand oxygen mask 
with microphone and inflatable head harness is intended to be used 
by crew members in the general aviation industry at a maximum 
altitude of 40,000 feet. These masks have been FAA approved and 
manufactured in accordance with the provisions of TSO-C78A and 
TSO-C89A and are equipped with fittings for attachment to 

aerox®

, Puritan-Bennett, Scott (AVOX), or SkyOx O2 Systems. 

 
 

       

OXYGEN SYSTEM REQUIREMENTS 

Minimum oxygen flow of 100 liters per minute at 55 Psi to 70 Psi 
must be supplied. It is the responsibility of the user to ensure that the 
oxygen system being used is capable of supplying the pressure 
required to maintain the proper flow rate. This mask comes with an 

aerox®

 flow indicator. It is the responsibility of the user to select 

the proper connector for his or her plug in.   

 

 

 

 

STOWAGE 

The 

aerox®

 diluter demand oxygen mask should be stored in an 

easily accessible area for quick donning. The storage location must 
protect the mask from damage and contamination. To increase 
service life, avoid stowing the mask in an area that is susceptible to 
direct sunlight and extreme temperature conditions. If the aircraft is 
to be exposed to extreme cold weather for an extended period, the 
mask should be removed and stored at ambient temperature. 
 
 

 

 

SERVICING 

The 

aerox®

 diluter demand oxygen mask shall only be serviced 

and repaired at the factory or 

aerox®

 authorized repair stations. 

Contact 

aerox®

 Aviation Oxygen Systems for the nearest 

authorized repair station. 

 

Shaw Aerox LLC

 

25190 Bernwood Dr.  

Bonita Springs, FL 34135 

Ph: 239-390-8158  Fax: 239-405-6101 

[email protected]    

www.aerox.com

 

OPERATION

 

1)

 

While depressing the right inflation paddle. Head harness will 
immediately inflate so that donning is possible using one hand. 

2)

 

Position the bottom of the mask as low as possible under the chin 
while positioning the lower head band around back of the neck and 
under the ears. 

3)

 

 Depress left paddle to deflate harness around head while adjusting 
mask to the face as the harness tightens. Adjust the upper head band 
by sliding forward or aft on the lower inflatable harness. Additional 
adjustment for comfort can be made by adjusting the Velcro™ strap 
on the back of head piece. 

4)

 

Oxygen flow and pressure must be checked prior to use by pressing 
both paddles at once and purging oxygen from the mask. 

 

WARNING

 

All personal using this equipment must have a thorough knowledge 
when to use supplemental oxygen and complete understanding as to 
the intent, performance and usage of a diluter demand oxygen mask. 

 

 

Always confirm the flow of oxygen during use via the supplied inline flow 
indicator. 

 

Inspect the mask prior to flight. Special attention must be given to the head 
gear for deterioration, cracks, tears, rips, and contamination. 

 

Examine the support straps for breaks or tears, loss of elasticity, and broken 
malfunctioning valves. 

 

Examine for excessively worn serrations on head harness, which might 
permit slippage. 

 

Remove the mask from service if any of these conditions are found. 

 

CLEANING

 

If the mask becomes contaminated and needs to be cleaned, use warm 
soapy water and a lint free cloth to wipe the exterior and interior of the 
mask. 
Use caution if mask is equipped with a microphone. Avoid direct 
contact with water or damage may occur. 
Do not use water heated above 140° F (60° C). 
Sanitize by hanging mask in an open area and spray with a 3% 
hydrogen peroxide solution in a fine mist. Allow to air dry completely.   

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