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EN/09.2019/G41 © STULZ GmbH – all rights reserved
cybercool 2 screw original insTrUcTions
Oil filling
Contact technical support for the requirements of the oil used;
• never mix different oil types!
• clean the piping completely before changing the oil type.
Topping up of up to 20-30% of the total quantity of oil contained in the compressor is allowed. For larger quanti
-
ties, contact technical support.
Procedure:
If there have been losses of oil, these must be replaced by topping up oil. To do this, carry out the points 1 to 7
(not 3a). In case of an oil change, the measure under item 3a must be carried out in addition.
1. Take a clean, dry, transparent container (with volume calibration) and fill it with at least twice the amount of the
required oil.
2. Shut off the compressor on the discharge side and on the suction side.
3. Evacuate the refrigerant from the compressor and collect it, until atmospheric pressure is reached.
3a. Drain the oil in the compressor through the oil drain plug (1) into a collecting device and dispose of it accord
-
ing to the regulations in force.
4. Connect the clean oil container by a pipe to the oil service valve (2) in the lower middle section of the
compressor.
5. Open the oil service valve and lift the oil container so that the oil flows into the compressor by gravity.
6. Fill in the required quantity of oil. Ensure that the supply line is always below the oil level. (to avoid the introduc
-
tion of air bubbles in the pipe)
The oil level should be in the lower quarter of the oil sight glass (3).
7. Close the oil service valve, open the shut-off valves of the compressor and recharge the collected refrigerant
into the refrigerant circuit.
Oil level
Check the oil level at the oil sight glass. During unit idleness the oil level should not be below the lower quarter
(bottom line) and not rise above the upper line during operation.
Oil heater
Check the oil heater function by switching off the fuse for the oil heater in the electric cabinet and by measuring
the ohmic resistance at the terminals in the electric cabinet. For the 300W heater the ohmic resistance should
approximately be 180 Ohm and 260 Ohm for the 200W heater.
(2) oil service valve
max. oil temperature sensor
(3) oil sight glass
oil heater
oil level sensor
