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R-410A
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REFERENCE
GUIDE
R-410A
refrigerant
operates
at
50%
-—
70%
higher
pressures
than
R-22.
Be
sure
that
servicing
equipment
and
replacement
components
are
designed
to
operate
with
R-410A.
R-410A
refrigerant
cylinders
are
rose
colored.
Recovery
cylinder
service
pressure
rating
must
be
400
psig,
DOT
4BA400
or
DOT
BW400.
R-410A
systems
should
be
charged
with
liquid
refrigerant.
Use
a
commercial
type
metering
device
in
the
manifold
hose.
Manifold
sets
should
be
750
psig
high-side
and 200
psig
low-side
with
520
psig
low-side
retard.
Use
hoses
with
750
psig
service
pressure
rating.
Leak
detectors
should
be
designed
to
detect
HFC
refrigerant.
R-410A,
as
with
other
HFC
refrigerants,
is
only
compatible
with
POE
oils.
POE
oils
absorb
moisture
rapidly.
Do
not
expose
oil
to
atmosphere.
POE
oils
may
cause
damage
to
certain
plastics
and
roofing
materials.
Vacuum
pumps
will
not
remove
moisture
from
oil.
A
liquid
line
filter-drier
is
required
on
every
unit.
Do
not
use
liquid
line
filter-driers
with
rated
working
pressures
less
than
600
psig.
Do
not
install
a
suction
line
filter-drier
in
liquid
line.
Wrap
all
filter-driers
and service
valves
with
wet
cloth
when
brazing.
Do
not
use
capillary
tube
indoor
coils.
Never
open
system
to
atmosphere
while
it
is
under
a
vacuum.
When
system
must
be
opened
for
service,
break
vacuum
with
dry
nitrogen
and
replace
all
filter—driers.
Do
not
vent
R-410A
into
the
atmosphere.
Observe
all
WARNINGS,
CAUTIONS,
NOTES,
and
bold
text.
International
Comfort
Products,
LLC
496
01
5501
01
Lewisburg,
TN 37091
USA
21