Victory Reach-In Wartungshandbuch PDF herunterladen (Seite 57)

Section 6 Refrigeration System

6-15

System Contamination Cleanup

GENERAL

This section describes the basic requirements

for restoring contaminated systems to reliable

service.

Important

Manitowoc Ice, Inc assumes no responsibility

for the use of contaminated refrigerant.

Damage resulting from the use of

contaminated refrigerant is the sole

responsibility of the servicing company.

DETERMINING SEVERITY OF

CONTAMINATION

System contamination is generally caused by

either moisture or residue from compressor

burnout entering the refrigeration system.

Inspection of the refrigerant usually provides

the first indication of system contamination.

Obvious moisture or an acrid odor in the

refrigerant indicates contamination.

If either condition is found, or if

contamination is suspected, use a Total Test

Kit from Totaline or a similar diagnostic tool.

These devices sample refrigerant, eliminating

the need to take an oil sample. Follow the

manufacturer’s directions.

If a refrigerant test kit indicates harmful levels

of contamination, or if a test kit is not

available, inspect the compressor oil.

1. Remove the refrigerant charge from the

Reach-In.

2. Remove the compressor from the system.

3. Check the odor and appearance of the oil.

4. Inspect the suction and discharge lines at

the compressor for burnout deposits.

5. If no signs of contamination are present,

perform an acid oil test.

Check the chart below to determine the type

of cleanup required.

Contamination/Cleanup Chart

Symptoms/Findings Required Cleanup Procedure

No symptoms or suspicion of contamination Normal evacuation/recharging procedure

Moisture/Air Contamination symptoms

• Refrigeration system open to atmosphere

for prolonged periods

• Refrigeration test kit and/or acid oil test

shows contamination

• Leak in water-cooled condenser

• No burnout deposits in open compressor

lines

Mild contamination cleanup procedure

Mild Compressor Burnout symptoms

• Oil appears clean but smells acrid

• Refrigeration test kit or acid oil test shows

harmful acid content

• No burnout deposits in open compressor

lines

Mild contamination cleanup procedure

Severe Compressor Burnout symptoms

• Oil is discolored and smells acrid

• Refrigeration test kit or acid oil test shows

harmful acid content

• Burnout deposits found in the compressor

and lines, and in other components

Severe contamination cleanup procedure

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