Servicing Systems On Roofs With Synthetic; Liquid Line Filter Drier; Puron (R-410A) Refrigerant Charging; Troubleshooting - Carrier Infinity 480CEN024 Installation Instruction

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water readily. POE oils can absorb 15 times as much water as other
oils designed for HCFC and CFC refrigerants. Take all necessary
precautions to avoid exposure of the oil to the atmosphere.
SERVICING SYSTEMS ON ROOFS WITH SYNTHETIC
MATERIALS
POE (polyolester) compressor lubricants are known to cause long
term damage to some synthetic roofing materials.
Exposure. even if immediately cleaned up, may cause
embrittlement (leading to cracking) to occur in one year or more.
When performing any service that may risk exposure of compressor
oil to the roof, take appropriate precautions to protect roofing.
Procedures which risk oil leakage include, but are not limited to,
compressor replacement, repairing refrigerant leaks, and replacing
refrigerant components such as filter drier, pressure switch,
metering device or coil.
Synthetic Roof Precautionary Procedure
1. ('over extended roof work area with an impermeable
polyethylene (plastic) drip cloth or tarp. ('over an
approximate 10 X 10 ft area.
2. Cover area in front of the unit service panel with a terry cloth
shop towel to absorb lubricant spills and prevent 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
The 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.
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 clip tube, charge Puron units with cylinder
in upright position and a commercial metering device in manifold
hose. Charge refrigerant into suction line.
Step 14--System Information
LOSS- OF-CHARG-E SWITCH
The loss of charge switch is a protective device wired into control
circuit (low voltage). It shuts off the compressor if abnormally low
pressures are present in the refrigeration circuit.
NOTE: Because these switches are attached to refrigeration system
under pressure, it is not advisable to remove this device for
troubleshooting unless you are reasonably certain that a problem
exists. If switch nmst be removed, remove and recover all system
charge so that pressure gauges read 0 psi. Never open system
without breaking vacuum with dry nitrogen.
TROUBLESHOOTING
Refer to the Cooling and Heating Troubleshooting Chart (Table 6)
for troubleshooting information.
START-UP CHECKLIST
Use the Start-Up Checklist at the back of this manual.
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