6
7.
8.
Gently push the bottom of the cartridge forward until the
TEZ
OM is secured in place. (Fig. 4)
Close the protective door until the latch engages, and
continue with the evacuation process.
Fig. 4
Changing the Oil Continued
How Often Should You Change the Oil?
A vacuum pump can only pull a vacuum as deep as the vapor pressure of the sealing oil. When
oil becomes saturated or contaminated, the vapor pressure rises and the evacuation process
can slow to a halt.
It is recommended that the oil in your TEZ8 be changed and a fresh T
EZ
OM installed at the
beginning of every new job. Doing this will ensure that your TEZ8 is supplied with clean, dry oil
with ultra-low vapor pressure maximizing the performance of your TEZ8.
With the clearly visible oil cartridge located on the front of the TEZ8, you can easily monitor and
identify wet or dirty oil. As the oil becomes more opaque, this indicates an increased level of
contamination. For example, as moisture is drawn into the T
EZ
OM Cartridge, the oil will take
on a white, milk-like appearance. Similarly, other contaminants from the system will turn the oil
dark and sludge may accumulate in the cartridge.
Imagine that your T
EZ
OM oil cartridge is like a paper towel that the TEZ8 is using to dry the
system. If the system has a significant amount of moisture in it, your paper towel gets saturated
quickly and stops absorbing the moisture as it should. At this point you have to decide wether or
not you can wait for the paper towel to dry and continue to use the same one or discard it and
get a fresh paper towel to dry more, faster.
The moisture absorbed in TEZ
OM oil may eventually evaporate but it takes time. Just like
changing to a fresh paper towel, replacing the T
EZ
OM cartridge speeds the evacuation process
up by keeping the oil clean and dry.
Large tonnage systems or systems that have been exposed to excessive moisture may require
more than one oil change to quickly complete the evacuation process. While this would be very
difficult with another vacuum pump, the TEZ8 has been designed so that you may remove and
replace the T
EZ
OM cartridge while the pump is running without breaking the vacuum.
Changing the oil in the Appion TEZ8, while it is running, is as easy as installing a new T
EZOM
oil cartridge following the above procedure steps 2 through 8.
Note:
When you change the T
EZ
OM cartridge while the pump is running, some oil from the oil
return will drip out after the old T
EZ
OM cartridge has been removed and before the new one is
in place. This is normal and should be cleaned up as soon as the new cartridge is in place.
