CyberChiller Series Installation, Operation & Maintenance Manual

harmful contaminants left by the burnout. See section

4.3.4.1.2(Burn-Out/Acidic Cleanup) for the proper cleaning procedure.

CAUTION

Damage to a replacement compressor caused by improper system cleaning constitutes abuse under the terms of the warranty. This will VOID THE COMPRESSOR WARRANTY.Always consult the factory prior to replacing the compres- sor.

If there is no acid in the oil, there has been a mechanical failure. See section 4.3.4.1.1 (Standard Cleanout) for the proper cleaning procedure.

CAUTION

POE oil is used in systems with R-407C refrig- erant. If a replacement compressor is provided, ensure that it is filled with POE oil before install- ing.

4.3.4.1.1Standard Cleanout Procedure

CAUTION

Avoid touching or contacting the gas and oil with exposed skin. Severe burns will result. Use long rubber gloves in handling contaminated parts.

NOTE

Cleaning operations must be performed by a jour- neyman, refrigeration mechanic, or air conditioning technician.

1.Turn off power to the unit at the main power disconnect switch.

2.Remove the burned-out compressor and install the new compressor.

3.Remove the liquid line drier and install an over- sized liquid line filter-drier (one size larger than the normal selection size).

4.Evacuate the system according to standard procedures. Normally, this will include the use of a high-vacuum pump and a low-vacuum micron gauge for measuring the vacuum obtained.

5.Recharge the system.

6.Turn on the power at the main power disconnect switch and start the system.

4.3.4.1.2Burn-Out/Acidic Cleanup Procedure

NOTE

Cleaning operations must be performed by a jour- neyman, refrigeration mechanic, or air conditioning technician.

1.These systems should be cleaned using the suction line filter-drier method.

2.Turn off power to the unit at the main power disconnect switch.

3.Remove the burned-out compressor and install the new compressor.

4.Install a suction line filter-drier designed for acid removal.

5.Remove the liquid line drier and install an over- sized liquid line filter-drier (one size larger than the normal selection size).

6.Check the expansion valve, sight glass and other controls to see if cleaning or replacement is required.

7.Evacuate the system according to standard procedures. Normally, this will include the use of a high-vacuum pump and a low-vacuum micron gauge for measuring the vacuum obtained.

8.Recharge the system through the access valve on the suction line filter-drier.

9.Turn on power at the main power disconnect switch and start the system.

10.The permanently installed suction line filter-drier permits small-system cleanup to be completed in one service call. The pressure drop across the suction line filter-drier should be measured during the first hour of operation. If the pressure drop becomes excessive, the suction line filter-drier should be replaced (See Sporlan Bulletin 40-10, for maximum recommended pressure drop (PSI) for suction line filter drier).

11.In 24 hours, take an oil sample. Observe the color and test for acidity. If the oil is dirty or acidic, replace the suction line filter-drier.

12.In 2 weeks, examine oil to determine if another suction line filter-drier change is necessary.

(©October, 2006)

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