PS Magazine - TB 43-PS-636
PS, The Preventative Maintenance Monthly
ISSUE 636
NOVEMBER 2005
PS 636
NOV 05
47
T
he data entry keyboard on the SINCGARS
radio can be a source of another type of entry—
moisture—if you don’t replace the seal when
you replace the keyboard. The seal makes a
waterproof bond between the data entry key-
board and the body of the SINCGARS. Too
often, lately, the keyboard has been replaced,
but the seal has been forgotten or a worn seal
used.
For added moisture-resisting
protection, add a light coat of
silicone, NSN 6850-00-927-
9461, where the seal, the key-
board and the radio body meet.
PS 636
NOV 05
46
Environmental
Control Unit…
Dear Editor,
Our Patriot battery heats and cools the command shelters with a
DRASH environmental control unit (ECU) that sits on a trailer next to
the generator.
To do the heating or cooling job, ducts must be run from the upper
supply ports and the lower return ports to the shelter. Often they are
connected the same way regardless of whether the job is heating or
cooling. This is wrong.
To
heat
the shelter, the supply ducts should be run through the lower
shelter ports and the return ducts through the upper shelter ports. This
just makes sense since warm air rises.
To
cool
the shelter, the opposite must be done. The supply ducts
should be run through the upper shelter ports and the return ducts
through the lower ports.
If your shelter is too hot in the summer and too cold in the winter,
you might want to check the hookup of these ducts.
CW3 Phillip Puckett
E Btry, 3-43 ADA, 11 ADA Bde
Ft Bliss, TX
Users, while you make sure your ducts are in a row, check for water buildup in
the ECU enclosure. There are two drain ports at the bottom of the enclosure to help
you remove water. Regular checks of the condenser, the evaporator fan belts, and
air filters are a must, too.
For further info on this system, including manuals, call DRASH at 1-800-977-
3647 or email:
drash@drash.com
Resupply of parts must come from DRASH, too. This includes the various filters
you need. One of the things that you were not issued but might be good to have is
an exhaust extension that takes the exhaust fumes away from your shelter area.
Editor’s note:
Thanks, Sir, for this
good ECU advice.
it’s time
to heat our
shelter!
right! it’s
all in how
you connect
the ducts.
Patriot Command Shelter
heating
OR
cooling!?
NSN
Model
RT-1439
RT-1523
RT-1523A
RT-1523B
RT-1523C
RT-1523D
RT-1523E
To make it easier to
have the seal you need
on hand, here are the
NSNs for each model
of SINCGARS…
Seal
makes a
water-
proof
bond
Make sure
seal is there
and in good
shape
what’s
going on
in here?
my circuits are
frozen because you
forgot
my seal!
SINCGARS
Radios…
636.46-47(C).qxd
9/29/05
5:27 PM
Page 1
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