Troubleshooting; Start- -Up Checklist - Carrier 48XP024 Installation Instructions Manual

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Manual (4 pages)

Table of Contents

WARNING

FIRE/EXPLOSION HAZARD

Failure to follow this warning could result in personal injury

or death and/or property damage.

Wear safety glasses and gloves when handling refrigerants.

Keep torches and other ignition sources away from

refrigerants and oils.

The scroll compressor pumps refrigerant throughout the system

by the interaction of a stationary and an orbiting scroll. The scroll

compressor has no dynamic suction or discharge valves, and it is

more tolerant of stresses caused by debris, liquid slugging, and

flooded

starts.

The

compressor

anti- -rotational device and an internal pressure relief port. The

anti- -rotational device prevents the scroll from turning backwards

and replaces the need for a cycle protector. The pressure relief

port is a safety device, designed to protect against extreme high

pressure. The relief port has an operating range between 550 and

625 psi differential pressure.

The Copeland scroll compressor uses Mobil 3MA POE oil. This

is the only oil allowed for oil recharge.

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal injury

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.

REFRIGERANT SYSTEM

This information covers the refrigerant system of the 48XP,

including the compressor oil needed, servicing systems on roofs

containing synthetic materials, the filter drier and refrigerant

charging.

Compressor Oil

The compressor in this system uses a polyolester (POE) oil,

Mobil 3MA POE. 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.

equipped

with

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. 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.