Vertiv Liebert PDX - Refrigeration Circuit Repair

26
Liebert
®
PDX, EconoPhase Version - UM - 265133 - 29.08.2019
10.6 - Refrigeration circuit
WHEN REPAIRING THE REFRIGERATION CIRCUIT, COLLECT ALL REFRIGERANT IN A CONTAINER: DO NOT ALLOW IT TO
ESCAPE.
• 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.
10.6.2 - Oil charge R410A
The oil to be used when topping up (only if there are any leaks) is EMKARATE RL 32-3MA or Mobil EAL Arctic 22CC (see Tab. 9
and Tab. 10).
Tab. 9 - EMKARATE RL 32-3MA oil
Viscosity at 40
0
C : 31.2 cSt
Viscosity at 100
0
C : 5.6 cSt
Viscosity index (ISO Grade) : 32
Tab. 10 - Mobil Arctic EAL 22CC oil
Density (at 15
0
C) : 0.967 kg/l
Flash point (C.O.C.) : 245 °C
Pour point : <-54 °C
Viscosity at 40
0
C : 23.6 cSt
Viscosity at 100
0
C : 4.7 cSt
Viscosity index (ASTM D2270) : 130
These oils rapidly absorb the 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
partial lling.
10.6.3 - Oil topping-up of an installed circuit
If oil leakages occur, the topping-up operation is necessary.
(Contact the local Service before intervention).
10.7 - Dismantling the unit
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.
CAUTION: 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.
The lead gel battery, refrigeration uid and the lubricating oil inside the circuit must be recovered according to the laws in force
in the relevant country.