Troubleshooting; Start- -Up Checklist - Bryant 574B Installation Instructions Manual

run- -offs, and protect drop cloth from tears caused by tools
or components.
3. Place terry cloth shop towel inside unit immediately under
component(s) to be serviced and prevent lubricant
run- -offs through the louvered openings in the unit base.
4. Perform required service.
5. Remove and dispose of any oil contaminated material per
local codes.
LIQUID LINE FILTER DRIER
This filter drier is specifically designed to operate with Puron.
Use only factory- -authorized components. Filter drier must be
replaced whenever the refrigerant system is opened. When
removing a filter drier, use a tubing cutter to cut the drier from the
system. Do not unsweat a filter drier from the system. Heat from
unsweating will release moisture and contaminants from drier
into system.
PURONR (R- -410A) QUICK REFERENCE GUIDE
Puron refrigerant operates at 50- -70 percent higher pressures than R- -22. Be sure that servicing equipment and replacement
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components are designed to operate with Puron
Puron refrigerant cylinders are rose colored.
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Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
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Puron systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose when
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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.
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Use hoses with 700 psig service pressure rating.
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Leak detectors should be designed to detect HFC refrigerant.
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Puron, as with other HFCs, is only compatible with POE oils.
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Vacuum pumps will not remove moisture from oil.
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Do not use liquid- -line filter driers with rated working pressures less than 600 psig.
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Do not leave Puron suction line filter driers in line longer than 72 hrs.
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Do not install a suction- -line filter drier in liquid line.
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POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
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POE oils may cause damage to certain plastics and roofing materials.
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Wrap all filter driers and service valves with wet cloth when brazing.
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A factory approved liquid- -line filter drier is required on every unit.
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Do NOT use an R- -22 TXV.
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If indoor unit is equipped with an R- -22 TXV or piston metering device, it must be changed to a hard shutoff Puron TXV.
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Never open system to atmosphere while it is under a vacuum.
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When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter
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driers. Evacuate to 500 microns prior to recharging.
Do not vent Puron into the atmosphere.
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Do not use capillary tube coils.
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Observe all warnings, cautions, and bold text.
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All indoor coils must be installed with a hard shutoff Puron TXV metering device.
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PURON (R- -410A) REFRIGERANT CHARGING
Refer to unit information plate and charging chart. Some R- -410A
refrigerant cylinders contain a dip tube to allow liquid refrigerant
to flow from cylinder in upright position. For cylinders equipped
with a dip tube, charge Puron units with cylinder in upright
position and a commercial metering device in manifold hose.
Charge refrigerant into suction- -line.

TROUBLESHOOTING

Use the Troubleshooting Guides (See Tables 10- -12) if problems
occur with these units.

START- -UP CHECKLIST

Use Start- -Up checklist to ensure proper start- -up procedures are
followed (See Page 30).
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