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EN/02.2018/G17F © STULZ GmbH – all rights reserved
cyberlab original instructions
• Put the refrigerant bottle on a scale.
• Note the weight before the filling.
• Connect the refrigerant bottle via a pressure measuring station to the refrigerant circuit.
nOtICe
Take care that you add refrigerant in a liquid state.
The refrigerant is a multi-component blend. The ratio of the refrigerant components changes if
one of the compounds passes over into the gaseous phase.
• Charge the refrigerant circuit with liquid refrigerant on both the high and low pressure sides simultaneously
to ensure that a positive refrigerant pressure is present in the compressor before it runs.
• Fill the majority of the charge in the high pressure side of the system to prevent bearing washout during first-
time start.
• Start the compressor by pressing the I/O button of the C7000 controller if you have filled up 70% of the
precalculated refrigerant charge. In some cases, this must be decided by the installer according to the ambi-
ent conditions on site.
WARnInG
Risk of injury by burns in case of contact with refrigerant.
In case of a defective filling line refrigerant can be discharged under high pressure.
Wear safety glasses and gloves.
Before the system is filled with refrigerant, it must be clean and dry inside.
• First evacuate the part of the refrigerant circuit, which is outside the chiller unit to aspirate humidity which is
possibly present in the external pipelines.
• Switch off the vacuum pump.
The refrigerant circuit is filled with nitrogen with overpressure.
• Open the stop valves.
• Carry out a tightness test.
• Top up nitrogen for this until a pressure of 24 bar is reached in the system.
• Evacuate the refrigerant circuit by the Schrader valves after the tightness has been confirmed.
• Apart from the volumes of the external piping and the volume of the condenser, take also into account the
following volumes to estimate the necessary refrigerant charge:
nOtICe
Risk of bearing malfunction
Do not subject the compressor to dry air.
Components
Evaporator
dm3
8,1
Liquid receiver
dm3
5
