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Warning, Troubleshooting, Start--up checklist – Carrier SEER 48ES User Manual

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pressure. The relief port has an operating range between 550
(26.34 kPa) and 625 psi (29.93 kPa) differential pressure.

EXPLOSION,

ENVIRONMENTAL

SAFETY

HAZARD
Failure to follow this warning could result in personal

injury, death or equipment damage.
This system uses Puron (R--410A) refrigerant which has

higher operating pressures than R--22 and other refrigerants.

No other refrigerant may be used in this system. Gauge set,

hoses, and recovery system must be designed to handle

Puron. If you are unsure, consult the equipment

manufacturer.

WARNING

!

Refrigerant System

This information covers the refrigerant system of the 48ES,

including the compressor oil needed, servicing systems on roofs
containing synthetic materials, the filter drier and refrigerant

charging.
Compressor Oil
The Copeland scroll compressor uses 3MAF POE oil. If additional

oil is needed, use Uniqema RL32--3MAF. If this oil is not
available, use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC.

This oil is extremely hygroscopic, meaning it absorbs 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,
replacing refrigerant components such as filter drier, pressure

switch, metering device, coil, accumulator, or reversing valve.

Synthetic Roof Precautionary Procedure

1. Cover extended roof working area with an impermeable

polyethylene (plastic) drip cloth or tarp. Cover an

approximate 10 X 10 ft. (3.1 m X 3.1 m) 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

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.

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 11--13) if problems
occur with these units.

START--UP CHECKLIST

Use Start--Up checklist to ensure proper start--up procedures are
followed.

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