Vogt TUBE-ICE 03TA, Service Manual, Page: 68 / 122

03TA Service Manual
MAINTENANCE
3/31/14
7-6
Any type tool to be considered should be tried first on a piece of copper tubing held in a vise or flare
block. Nylon, brass, or copper brushes are recommended. If any flakes of copper appear or if score
marks are made inside the tube, the tool should not be used. Never use anything with sharp or rigid
edges which could cut into the copper tubing.
Lubrication
Compressor.
When starting and charging the unit, the oil sight glass (33) in the crankcase of the
compressor should be watched carefully for the first hour to make certain the proper lubrication is
being maintained. The oil may become low in the crankcase on an initial start-up if electrical current
has been interrupted to the machine, thus de-energizing the compressor crankcase heater.
Before starting the machine again, the heater should be energized for a time period of at least two
hours to evaporate refrigerant that may have condensed in the crankcase during the shutdown period.
If the level is low after start-up, it should begin to return after a short period of operation.
FIGURE 7-1
Copeland Discus Compressor (3D)
The oil level should be checked frequently, particularly during the start-up operation, to see that a
sufficient amount of oil remains in the crankcase. While it is important to observe the oil splash
during operation, the true level can be obtained only when the compressor is stopped. With the
compressor idle, the oil level should be at a height of 1/4 to 1/2 of the sight glass but never above the
top of the sight glass.
Although the machine was shipped with the oil charge, which was originally added for the test
operation, it may be necessary to add some oil when or if new refrigerant is added to the system.
Refrigerant Recommended Lubricants Type of Lubricant
R-22 Suniso 3GS, Texaco WF32, Calumet RO15 (Witco) Mineral Oil
R-404A Mobil EAL ARCTIC 22 CC, ICI (Virginia KMP) Emkarate RL 32S Polyol Ester Oil
TABLE 7-2
Recommended Lubricants
Oil Charging Connection
(1/4” access fitting with shrader)
Oil Sightglass
To Oil Separator
Suction
Service
Valve
Oil Return shut-off valve
(from oil separator)