Download to - Survival Air Systems

7.
Maintenance
8. - Separator - mechanically removes liquid
moisture and oil.
9. - Window Type CO & MO Indicator - This
will be installed only if the Electronic CO &
MO monitoring system is not installed in the
unit.
10. - Pressure Maintaining Valve
7.2
Purification System layout
and function
6
3
7 5
2 4
7.3
10
Filter Cartridge
Capacity & Replacement
Capacity
See “Appendix-A” for the MAKO purification
system data sheets for the FC models,
“appendix-B” for the U.S. MK models and
“appendix-C” for the FD models.
9
8
These appendices will show, the Cartridges
required and the processing capacity in
cubic feet for each purification system.
Next the flow capacity of the compressor in
cubic feet per minute and the maximum
hours between filter changes will be shown.
1
Cartridges have a maximum service life of 6
months regardless of the number of hours
run.
fig. 7.2-1 Purification system
1. - Bleed Valve
2. - Purification Chamber - Final chamber in
the purification system. (all breathing air
units will have one of these)(MK style
housings are shown)
3. - Top Plug of the Purification Chamber - If
the unit has an electronic CO or MO
monitoring system this is where the sensor
will be mounted.
4. - Purification Filter Cartridge - This
cartridge contains:
Desiccant - to remove moisture.
Activated Charcoal - to remove smells and
taste.
Catalyst - to remove carbon monoxide
After filter cartridges are changed check the
correct purification data sheets for the
number of hours to the next filter change.
Record the hour and date that the next filter
change will be due in the daily log book.
Always carry this information forward to the
current page of the daily log book.
Replacement
The following procedure is for filter cartridge
replacement for a MAKO unit with a MK5C
purification system.(see section 7.2) Modify
as necessary for your MAKO unit.
1. - Make sure the compressor is turned off.
Danger !
2. - Make sure any valves to any storage
banks are closed.
The Catalyst must be kept free of moisture
or it will not remove (convert) the carbon
monoxide. Test the outlet air using a CO or
Dew Point monitor. If there is doubt, change
the cartridge at once.
3. - Slowly Open the bleed valve [1] to
depressurize the purification system.
Danger !
5. - Drying Chamber - units may not have a
drying chamber or they may have more
than one. (MK style housings are shown)
6. - Top Plug of the Drying Chamber
7. - Drying Cartridge - This cartridge
contains Desiccant to remove moisture.
Rapid venting or charging of these
chambers may cause the cartridges to
rupture. This may cause contamination of
the air stream.
7-2