10
PURON
R
(R
−
410A) QUICK REFERENCE GUIDE
S
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
S
Puron refrigerant cylinders are rose colored.
S
Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
S
Puron systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose when
charging into suction line with compressor operating
S
Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low
−
side retard.
S
Use hoses with 700 psig service pressure rating.
S
Leak detectors should be designed to detect HFC refrigerant.
S
Puron, as with other HFCs, is only compatible with POE oils.
S
Vacuum pumps will not remove moisture from oil.
S
Do not use liquid
−
line filter driers with rated working pressures less than 600 psig.
S
Do not leave Puron suction line filter driers in line longer than 72 hours.
S
Do not install a suction
−
line filter drier in liquid line.
S
POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
S
POE oils may cause damage to certain plastics and roofing materials.
S
Wrap all filter driers and service valves with wet cloth when brazing.
S
A factory approved liquid
−
line filter drier is required on every unit.
S
Do NOT use an R
−
22 TXV.
S
If indoor unit is equipped with an R
−
22 TXV or piston metering device, it must be changed to a hard shutoff Puron TXV.
S
Never open system to atmosphere while it is under a vacuum.
S
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.
S
Do not vent Puron into the atmosphere.
S
Do not use capillary tube coils.
S
Observe all
warnings
,
cautions
, and
bold
text.
S
All indoor coils must be installed with a hard shutoff Puron TXV metering device.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
E
2015 Bryant Heating & Cooling Systems
D
7310 W. Morris St.
D
Indianapolis, IN 46231 Edition Date: 03/15
Replaces: II226A-04
Catalog No. II226A-05
226A
