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PURON®
(R-410A)
QUICK
REFERENCE
GUIDE
• Puron refrigerant
operates
at 50- 70 percent
higher pressures
than R-22.
Be sure that servicing
equipment
and replacement
components
are designed
to operate with Puron
• Puron refrigerant
cylinders
are rose colored.
• Recovery
cylinder
service pressure
rating must be 400 psig, DOT 4BA400
or DOT BW400.
• Puron systems
should be charged
with liquid refrigerant.
Use a commercial
type metering
device in the manifnld
hose when
charging
into suction
line with compressor
operating
• Manifold
sets should be 700 psig high side and 180 psig low side with 550 psig low-side
retard.
• Use hoses with 700 psig service pressure
rating.
• Leak detectors
should be designed
to detect HFC refrigerant.
• Puron,
as with other HFCs,
is only compatible
with POE oils.
• Vacuum pumps will not remove
moisture
from oil.
• Do not use liquid-line
filter driers with rated working
pressures
less than 600 psig.
• Do not leave Puron suction
line filter driers in line longer than 72 hours.
• Do not install a suction-line
filter drier in liquid line.
• POE oils absorb moisture
rapidly.
Do not expose
oil to atmosphere.
• POE oils may cause damage
to certain plastics and roofing
materials.
• Wrap all filter driers and service valves with wet cloth when brazing.
• A factory
approved
liquid-line
filter drier is required
on every unit.
• Do NOT use an R-22
TXV.
• If indoor unit is equipped
with an R-22 TXV or piston metering
device, it must be changed
to a hard shutoff Puron TXV.
• Never open system
to atmosphere
while it is under a vacuum.
• When system
must be opened
for service, recover
refrigerant,
evacuate
then break vacuum
with dry nitrogen
and replace filter
driers. Evacuate
to 500 microns
prior to recharging.
• Do not vent Puron into the atmosphere.
• Do not use capillary
tube coils.
• Observe
all warnings,
cautions,
and bold text.
• All indoor
coils must be installed with a hard shutoff Puron TXV metering
device.
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