Liebert DS Air-Cooled Condenser and Drycoolers, Reheat-Electric Reheat Three-Stage and SCR

Maintenance

12.5Air-Cooled Condenser and Drycoolers

•Clear coil surface of all debris that will inhibit airflow.

•Check for bent or damaged coil fins and correct.

•Do not permit snow to accumulate around or under outdoor unit.

•Periodically consider commercial cleaning of coil surface

•Inspect fans, motors and controls for proper operation.

•Check all piping and capillaries for proper support.

•Inspect for leaks.

12.6Reheat—Electric Reheat (Three-Stage and SCR)

•Inspect and clean reheat elements.

•Inspect and tighten support hardware.

12.7Compressor

12.7.1Compressor Oil

!CAUTION

Risk of improper compressor lubrication. Can cause compressor and refrigerant system damage.

Failure to use oil types, viscosities and quantities recommended by the compressor manufacturer may reduce compressor life and void the compressor warranty. See oil types specified in Table 55.

•Do NOT mix polyolester (POE) and mineral-based oils.

•Do NOT mix oils of different viscosities.

Consult Emerson or the compressor manufacturer if you have questions.

Table 55 Compressor oil types

	Refrigerant Type
Compressor Type
	R-22	R-407c
Carlyle Semi-Hermetic	Mineral Oil 1	POE Oil - ISO
		68 Viscosity 2
Copeland Scroll	POE Oil - ISO 22 Viscosity 3
and Digital Scroll

1.Use Carlyle Mineral Oil Totaline P903-2001, Witco Suniso 3GS or other Carlyle-approved oils.

2.Use Carlyle POE Oil Totaline P903-1001, Castrol SW68 or other Carlyle-approved oils.

3.Use Copeland POE Oil ULTRA 22CC, Mobil EAL Arctic 22CC or other Copeland-approved oils.

12.7.2Semi-Hermetic Compressors

Oil level can be viewed at the sight glass on semi-hermetic compressors. Normal operating oil level is 1/4 to 3/4 up the sight glass.

After a compressor has been idle for an extended length of time, foaming will usually be present when compressor first starts. Wait until compressor has been operating for at least five minutes before viewing the oil level.

If oil level is low, the cause must be corrected and oil level returned to its proper level.

12.7.3Scroll and Digital Scroll Compressors

Hermetic scroll and digital scroll compressors do not have an oil sight glass.

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