Operating Temperature - LEYBOLD TRIVAC D 2,5 E-LD Operating Instructions Manual

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24 GA01601_002_C1 - 03/2018 - © Leybold
NOTICE Pumping of Vapours
Vapour phases may only be pumped up to the permissible limit after the
pump has attained its operating temperature.
During pumping, vapours may dissolve in the oil. This changes the oil pro-
perties and thus there is a risk of corrosion in the pump. Therefore, don't
switch off the pump immediately after completion of the process. Instead,
allow the pump to continue operating with the gas ballast valve open and
the intake line closed until the oil is free of condensed vapours. We strongly
recommend operating the TRIVAC D 2,5 E-LD in this mode for about 30
min utes after completion of the process.
In cyclic operation, the TRIVAC D 2,5 E-LD should not be switched off during
the intervals between the individual working phases (power consumption is
minimal when the pump is operating at ultimate pressure), but should con-
tinue to run with gas ballast valve open and intake port closed (if possible via
a valve).
Once all vapours have been pumped off from a process (e.g. during drying),
the gas ballast valve can be closed to improve the attainable ultimate
sure.

4.3.3 Operating Temperature

Proper operation of the TRIVAC D 2,5 E-LD is ensured at ambient tempera-
tures between 10 °C and 40 °C.
When the pump is warm, the temperature at the surface of the TRIVAC D 2,5
E-LD may rise to between 40 °C and 80 °C, depending on the load on the
pump.
CAUTION Beware of hot surfaces
There is the danger of receiving burns.
Observe Safety Informations 0.3.
If – due to the ambient conditions – this temperature range is exceeded at
either end of the range, contact Leybold Sales.
The motor may accelerate with a delay when simultaneously an undervoltage
is present at the motor and the pump is at the minimum permissible and
ambient temperature.
pres-