D
–EIMWC00508-16EN - 37/48
ICI Emkarate RL 68H
The standard oil charge for a compressor is 16 litres.
Oil filter replacement procedure
Procedure to replace oil filter
1)
Shut down both compressors by turning the Q1 and Q2 switches to the Off position.
2)
Turn the Q0 switch to Off, wait for the circulation pump to turn off and open the general disconnecting switch
Q10 to cut off the machine’s electrical power supply.
3)
Place a label on the handle of the general disconnecting switch in order to prevent accidental start-up.
4)
Close the suction, discharge and liquid injection valves.
5)
Connect the recovery unit to the compressor and recover the refrigerant in a suitable and clean container.
6)
Evacuate the refrigerant until the internal pressure has turned negative (compared to atmospheric pressure).
The amount of refrigerant dissolved in the oil is reduced to a minimum in this way.
7)
Drain the oil in the compressor by opening the drain valve located under the oil separator.
8)
Remove the oil filter cover and remove the internal filter element.
9)
Replace the cover and internal sleeve gaskets. Do not lubricate the gaskets with mineral oil in order not to
contaminate the system.
10)
Insert the new filter element.
11)
Reposition the filter cover and tighten the screws. The screws must be tightened alternately and progressively
setting the torque wrench at 60 Nm.
12)
Charge the oil from the upper valve located on the oil separator. Considering the high hygroscopy of ester oil, it
should be charged as quickly as possible. Do not expose ester oil to the atmosphere for more than 10 minutes.
13)
Close the oil charging valve.
14)
Connect the vacuum pump and evacuate the compressor up to a vacuum of 230 Pa.
15)
On reaching the above vacuum level, close the vacuum pump valve.
16)
Open the s
ystem’s delivery, suction and liquid injection valves.
17)
Disconnect the vacuum pump from the compressor.
18)
Remove the warning label from to the general disconnecting switch.
19)
Close the general disconnecting switch Q10 to supply power to the machine.
20)
Start the machine by following the start-up procedure described above.
Refrigerant charge
ATTENTION
The units have been designed to operate with R410A refrigerant. So DO NOT USE refrigerants other than R410A.
ATTENTION
When refrigerant gas is added to or removed from the system, ensure proper water flow through the evaporator for
the entire charge/discharge time. Interrupting the water flow during this procedure would cause the evaporator to
freeze with consequent breakage of its internal piping.
Damage caused by freezing makes the warranty void.
WARNING
Removal of the refrigerant and replenishing operations must be performed by technicians who are qualified to use the
appropriate materials for this unit. Unsuitable maintenance can result in uncontrolled losses in pressure and fluid. Do
not disperse the refrigerant and lubricating oil in the environment. Always be equipped with a suitable recovery
system.
The units ship with a full refrigerant charge, but in some cases it might be necessary to replenish the machine in the field.
WARNING
Always verify the causes of a loss of refrigerant. Repair the system if necessary then recharge it.
The machine can be replenished under any stable load condition (preferably between 70 and 100%) and under any
ambient temperature condition (preferably above 20°C). The machine should be kept running for at least 5 minutes to
allow the condensation pressure to stabilise.
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