Liebert DS User Manual
Maintenance
117
12.5 Air-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.
• 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.
12.6 Reheat—Electric Reheat (Three-Stage and SCR)
• Inspect and clean reheat elements.
• Inspect and tighten support hardware.
• Inspect and tighten support hardware.
12.7 Compressor
12.7.1 Compressor Oil
• Do NOT mix polyolester (POE) and mineral-based oils.
• Do NOT mix oils of different viscosities.
• Do NOT mix oils of different viscosities.
Consult Emerson or the compressor manufacturer if you have questions.
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.
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.
12.7.2 Semi-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
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.
If oil level is low, the cause must be corrected and oil level returned to its proper level.
12.7.3 Scroll and Digital Scroll Compressors
Hermetic scroll and digital scroll compressors do not have an oil sight glass.
!
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
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.
Table 55
Compressor oil types
Compressor Type
Refrigerant Type
R-22
R-407c
Carlyle Semi-Hermetic
Mineral Oil
POE Oil - ISO
68 Viscosity
Copeland Scroll
and Digital Scroll
POE Oil - ISO 22 Viscosity