Page 5 of 20
3.
Pour new oil into the filling hole into the filling hole until the level is half way up the sight glass (7).
4.
Screw the filling cap (6).
It is advisable to carrying out a periodic interior cleaning of oil and of pump body. To do this, first pour
¼ in the normal amount of oil for normal pump working, run the pump for 30 seconds to empty it out.
Next repeat this operation with the same amount of oil and the same time, empty it out again and
then pour in the final filling to half way up the level sight glass.
As the pump may be damaged by being idle for long periods with dirty oil in it, it is advisable to
change the oil before the beginning of the idle period.
The recommended TELSTAR Oils are:
- AV-30, mineral oil for general industry and laboratory applications.
- CHEMOIL-500, specially designed for use at high temperatures.
- WETOIL-8r, specially designed for moisture absorbing applications.
Vacuum pump oil capacity: 0,5 litres.
2.1.4.
CONTROL VISUAL DE PÉRDIDAS DE ACEITE
Make sure that there is no oil remaining around the vacuum pump. Presence of oil drops means oil loss
through the seals, caps or level. Proceed to clean the area and locate the origin of the loss.
2.1.5.
GAS BALLAST SITUATION
The gas-ballast (2) is placed in the suck-back pipe (5) communicating this pipe with the gas exhaust
filter of the vacuum pump (includes a gas ballast key (3), that allows its regulation).
2.2.
REFRIGERATING SYSTEM MAINTENANCE
The refrigerating system needs practically no maintenance. If, by accident or due to any refrigerating
circuit damage, oil or cooling liquid has to be added, consult our technical service.
To ensure proper cooling of the refrigerating system, all the grids must beat a suitable distance from
the equipment and the wall (minimum distance of 20 cm.).
Periodic cleaning away of dust accumulated in the cooling unit condensing battery at the back of the
base unit is recommended. To clean this, the cover must be opened and a small paintbrush used to
remove the dust. This should be done particularly before summer.
When the switch is off, the compressor continues working for the time set by the collecting timer (2
min.) in order to suck up the gas from the evaporator. If the compressor fails to stop after this period,
the equipment must be inspected, as it is not good for the compressor to continue working without
circulating gas.
Refrigerating loads:
R-404a R-23
CRYODOS-50
800 gr.
-----
CRYODOS-80
800 gr.
8 kg/cm
2
2.3.
TECHNICAL ASSISTANCE PROGRAM
This is a menu incorporated in the equipment, which provides for come of the maintenance work.
WARNING
This program is only for maintenance and technical assistance tasks; it should never be used for
normal equipment operations.
