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OPERATION AND INSTALLATION MANUAL
COD. 091003 - KME 18-22-30-37 - REV. 07 - DATA 11/2016
pag.38 of 68
6.9
COMPRESSOR LUBRICATION
6.9.1
GENERAL RECOMMENDATIONS
CAUTION!
Before performing any operation involving draining or topping up compressor oil,
unplug the compressor and wait until the system has reached atmospheric pressure.
Use adequate protection when handling lubricants.
We recommend a lubricant compatible with the ISO VG 46 oil (mineral-based oil) used during
testing. The pour point must be at least -8+10°C and the flash point higher than +200°C.
KTC O
ilscrew plus 46
For use of incompatible oils, follow the procedure described in chapter 6.9.2
Never mix different types of oil
We recommend using oil with a VG32 rating for cold climates and VG68 for tropical climates.
Before starting up compressors without oil, feed
approximately 0.8
l
of lubricant in through the
regulator intake opening while keeping the suction valve shutter lowered and manually turning the
screw rotors in the right direction.
CAUTION!
When lowering the suction valve shutter be careful not to damage the throttle valve O-
ring.
Feed the mineral-based lubricant into the oil tank using the special top-up hole and fill until the
right level is read on the window. The amount of oil to be fed is indicated in Ch. 4
.
Start up the compressor, initially switching it on and off sequentially and quickly and then starting it
up.
Once initially filled with oil, turn off the compressor, vent the pressure and, if necessary, top up the
lubricant from the top-up hole until the right level is read on the window.