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System Protectors

Emerson Climate Technologies

Clean-Up Procedure for Compressor Motor Burnout

1. Determine the extent of the burnout. For mild burnouts where contamination has not spread thru the system it

may be economical to save the refrigerant charge, if the system has service valves on the compressor. A severe

burnout exists if the oil is discolored, an acid odor is present, and contamination products are found on the high

and low side. In this condition, caution should be exercised to avoid breathing the acid vapors. Also, avoid skin

contact with the contaminated liquid.

2. Thoroughly clean and replace all system controls such as TXVs, solenoids, check valves, and reversing valves.

Remove all strainers and lter driers.

3. Install replacement compressor and make a complete electrical check.

4. Make sure that the suction line near the compressor is clean. Install an over-sized liquid line lter drier and a

suction line lter drier.

5. Pressure and leak-test the system according to unit manufacturer’s recommendations.

6. Triple evacuate to at least 200 microns. Break the vacuum with clean, dry refrigerant at 0 psig.

7. Charge the system through an Emerson EK lter drier to equipment manufacturer’s recommendations.

8. Start the compressor and put the system in operation. Record the pressure drop across the suction line lter

drier on the enclosed label and apply label to the side of the shell.

9. Replace the suction line lter drier if the pressure drop becomes excessive.

10. Observe the system during the rst 4 hours. Repeat step 9 as often as required, until no further change in pres-

sure drop is observed.

11. After the system has been in operation for 48 hours, check the condition of the oil with an acid test kit. If the oil

test indicates an acid condition, replace the liquid and suction line lter driers.

12. Check the system again after 2 weeks of operation. If the oil is still discolored, replace the liquid and suction line

lter drier.

13. Clean-up is nished when the oil is clean and odor-free, and is determined to be acceptable with the acid test

kit.

For detailed burnout clean-up procedure and recommendations, consult the RSES Service Manual, Section 91.

Compressor Burnout

A compressor burnout can be expected to release a

variety of pollutants into the system, including acids. The

clean-up procedure below describes the use of system

protectors in cleaning up a system.

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Emerson Fluid Chiller Anleitung zur Fehlerbehebung Seite 36