40 VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
Every 6 months, check that dampers complete their full movement
freely and without stops, particularly the motorized ones.
For manually controlled dampers, check the holding device that
keeps them in position.
• When removing (for repairs) or charging refrigerant, it must
always be done on both the high and low pressure sides of the
compressor simultaneously.
• The compressor copper plated steel connections should be
welded with a silfos material containing a minimum of 5%
silver.
During brazing or unbrazing activities,
protect surrounding components from direct heat.
Particular attention must be paid with the brazed joints
close to the heat exchanger. Temperatures in the direct
proximity of the composite heat exchanger plates and of
the painted metal frame of the heat exchanger must be
kept below 70°C. If this condition is not respected, the
heat exchanger could be irreversibly damaged.
The additional oil charge is already charged in factory. Check the
right oil level in sight glass during the commissioning (see 8.1). If
the level is too low see 9.6.2.
The oil to be used when topping up (only if there are any leaks) is
EMKARATE RL 32 - 3MAF or Mobil EAL Arctic 22CC (see Tab. 9.1
and Tab. 9.2).
Viscosity at 40°C : 31.2 cSt
Viscosity at 100°C : 5.6 cSt
Viscosity index (ISO Grade) : 32
Density (at 15°C) : 0.967 kg/l
Flash point (C.O.C.) : 245°C
Pour point : < -54°C
Viscosity at 40°C : 23.6 cSt
Viscosity at 100°C : 4.7 cSt
Viscosity index (ASTM D2270) : 130
These oils rapidly absorb humidity present in the air when they are
exposed to the atmosphere. If the oil absorbs humidity, the ester
molecules can break down, forming acidity.
We therefore recommend exposing the oil for as short time as
possible (no more than a few minutes) and, in case of topping up,
using exclusively the oil indicated on the refrigerating compressor.
Normally 1 or 2 litre cans are available for this purpose; once they
are opened, they must be completely used up.
They must not be used after a long period, as they absorb humidity.
It is therefore obvious that the taps of the compressor must only be
turned after the whole plant has been subjected to a vacuum and
If oil leakages occur, the topping-up operation is necessary.
(Contact the local Service before intervention).
When unit is expected to be out of order for long periods, it is
recommended to use the following simple precautions:
on the general electric panel and
place a warning notice that the unit is out of order;
2. Shut water supply;
(the water discharge valve is normally
opened, with spring return);
4. Shut coil valves and drain coils;
5. Shut all dampers ;
6. Every days have motors, fan and pumps to rotate for few
seconds to avoid damages to bearing.
Every 6 months, check that dampers complete their full movement
freely and without stops, particularly the motorized ones.
In case the unit could remain idle at ambient temperature below
0°C, it is particularly important to proceed to coil drainage as per
point 4), furthermore it is necessary to empty all traps and replenish
them with an antifreeze solution.
The machine has been designed and built to ensure continuous
operation.
The working life of some of the main components, such as the fan,
depends on the maintenance that they receive.
The unit contains substances and components
hazardous for the environment (electronic components,
lead gel battery, refrigerating gases and oils). At the
end of the useful life, when the unit is dismantled, the
operation must be carried out by specialized refrigerating
technicians. The unit must be delivered to suitable
centers specialized for the collection and disposal of
equipment containing hazardous substances.
oil inside the circuit must be recovered according to the
laws in force in the relevant country.
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