25
Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
13.
EXTRAORDINARY MAINTENANCE
The NRL are loaded with R410A gas and tested in the
factory. In normal conditions, no Technical Assistance
Service operation is needed for the refrigerant gas
check. Along time, however, small leaks from the joints
may be generated. Due to these leaks, the refrigerant
comes out and the circuit is drained, causing the unit
malfunction. In these cases, the refrigerant leakage
points are found and repaired, and the cooling circuit
is recharged, operating in compliance with
Law 28
December 1993 no. 549.
13.1. LOADING PROCEDURE
The loading procedure is as follows:
• Empty and dehydrated the entire refrigeration circuit
using a vacuum pump connected to the low grip as to
the high grip of high pressure till the vacuum gauge re-
ading up to about 10 Pa. Wait some minutes and check
that this value does not goes back again over 50 Pa.
• Connect the refrigerant gas bomb or a load cylinder
to the grip on the low-pressure line.
• Charge the amount of refrigerant gas indicated on
the characteristics plate of the machine.
• After any operation control that the liquid indicator
indicates a dry circuit (dry-green) In case of partial
loss the circuit has to be emptied completely before
reloading it.
• The refrigerant R410A has to be loaded only in liquid
phase.
• Different operating conditions from the normal can
result in different values.
• Leak testing or leaking research must be carried out
only by using refrigerant gas R410A by checking with a
suitable leak detection.
• It is prohibited to use in the refrigeration circuit, oxy-
gen or acetylene or other flammable or poisonous gas
because they can cause explosions or intoxication.
ATTENTION
A machine logbook should ideally
be kept (not supplied, but at the
user's responsibility), allowing the
operation carried out on the unit
to be tracked, and to facilitate the
organisation of operations making
the troubleshooting and preven-
tion of possible failures to machine
easier. The logbook should contain,
the type of operation performed
(routine maintenance, inspection
or repair), description of the ope-
ration, measures implemented.
ATTENTION
it is forbidden to CHARGE the
cooling circuits with a refrigerant
different from the one indicated.
If a different refrigerant gas is
used, the compressor may result
seriously damaged.
ATTENTION
Provided that the disposal of the
unit is carried out according to the
rules in force in different countries.
