Tecumseh Argus - Polyol Ester Lubricants; Hygroscopicity; Color; System Start up Procedure

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©2019 Tecumseh Compressor Company LLC. All rights reserved. TPC Part #71511 | Rev A 05/13/2019www.tecumseh.com
SYSTEM START-UP PROCEDURE
• Check the electrical connections to verify that they are properly attached and secured.
• Check the electrical supply versus nameplate specifications.
• Check if the voltage deviation is within the specified range.
• Check all mechanical and electrical connections to verify if they are properly tightened and secured.
Compressor mounting parts, fan motor mounting screws, fan blade tightening screw, shroud
and electrical boxes, etc.
• Check that the safety and pressure controls are connected and set correctly.
• Check that the applicable suction and liquid valves are open.
• Check by isolating the compressor motor if the control circuit including thermostat and solenoid valve
(if used) is wired and operates correctly.
• Confirm that the system has been properly leak tested, evacuated and charged. If not, then follow the leak
testing, evacuating and charging procedures described respectively in this manual “Pressure testing for leaks,”
“System evacuation” and “Refrigerant charging.” If the system has been previously charged, make sure
that the crank case heater is turned on at least 24 hours prior to start up. Otherwise warm up the
compressor bottom shell to assure that the refrigerant will not cause damage to the compressor due to the
slugging condition. Do not attempt to warm up the compressor by applying a flame to the crankcase.
• Turn on the electrical power to the condensing unit and unit cooler(s).
The compressor will start when the low-pressure control closes and the pressure rises.
• Always re-assemble the enclosure panels when start-up job is completed.
Make sure all panels are secure and panel screws are properly tightened.
POLYOL ESTER LUBRICANTS
POE’s must be used if HFC refrigerants are used in the system. They are also acceptable for use with any of the
traditional refrigerants or interim blends and are compatible with mineral oils.
HYGROSCOPICITY
Ester lubricants (POE) have the characteristic of quickly absorbing moisture from the ambient surroundings.
Since moisture levels greater than 100 ppm will result in system corrosion and ultimate failure, it is imperative that
compressors, components, containers and the entire system be kept sealed as much as possible. Lubricants will
be packaged in specially designed, sealed containers. After opening, all the lubricant in a container should be used
at once since it will readily absorb moisture if left exposed to the ambient. Any unused lubricant should be properly
disposed of. Similarly, work on systems and compressors must be carried out with the open time as short as
possible. Leaving the system or compressor open during breaks or overnight MUST BE AVOIDED!
Color
As received, the POE lubricant will be clear or straw colored. After use, it may acquire a darker color. This does not
indicate a problem as the darker color merely reflects the activity of the lubricant’s protective additive.