Carrier 50FC 020-099, Installation, Operation And Maintenance Instructions, Page: 11 / 80

11
Minimum area for indoor air distribution
(R-454B refrigerant)
The unit with refrigerant R-454B (A2L
fl
uid) needs a minimum
surface in the room where the air supplied by its indoor circuit will
be distributed, according to EN-378-1:
Important: It is the customer’s responsibility to carry out the risk
analysis of the installation and, as a result of that analysis, to take
the necessary measures according to standard EN-378-1. Consult
the recommendations given in the “A2L rooftop installation guide”
(Nb. 10714).
Sound Level
These units are designed to work with a low acoustic level. In any
case, the following must be taken into account for the design of
the installation: the outdoor environment for acoustic radiation, the
type of building for the noise transmitted by air, the solid elements
for the transmission of vibrations.
To reduce transmission through solid surfaces to the maximum, it
is very advisable to install shock absorbers between the ground
or structure and the unit frame. If necessary, a study must be
commissioned to an acoustic technician.
Sound power level (LW)
Sound pressure level (LP)
Measurement conditions: in a clear
fi
eld, measured at a distance
of 5 metres, directivity 2 and at 1,5 metres from the ground.
Note: The sound pressure level depends on the installation
conditions and, as such, it only indicated as a guide. Values
obtained according to the ISO 3744 standard.
7 - POSITIONING AND INSTALLATION
50FF/FC 020 028 037 040 045 047 052
Total dB(A) 51,0 55,5 56,0 56,0 56,5 57,5 58,3
50FF/FC 058 062 070 074 086 093 099
Total dB(A) 58,8 59,3 59,3 59,1 59,1 59,6 61,1
50FF/FC 020 028 037 040 045 047 052
63 Hz 55,2 60,8 61,4 60,9 61,3 63,1 64,3
125 Hz 64,2 66,7 68,9 66,1 70,0 71,1 69,6
250 Hz 71,8 74,8 76,1 72,9 76,3 76,4 77,0
500 Hz 70,2 76,7 76,4 76,8 77,1 78,3 79,5
1000 Hz 72,0 76,2 76,3 77,5 77,3 78,2 79,4
2000 Hz 69,7 73,5 74,3 75,3 74,1 75,5 77,0
4000 Hz 62,6 69,2 70,3 70,6 70,4 72,2 73,1
8000 Hz 59,0 63,7 65,5 65,8 65,6 67,5 67,9
Total dB(A) 77,5 82,0 82,5 82,5 83,0 84,0 85,0
50FF/FC 058 062 070 074 086 093 099
63 Hz 64,5 64,9 64,8 64,6 64,6 65,3 66,8
125 Hz 69,9 71,5 72,4 71,3 71,4 74,0 75,5
250 Hz 77,7 78,9 79,7 78,4 77,9 79,3 80,8
500 Hz 80,1 80,4 79,9 80,1 80,2 80,9 82,4
1000 Hz 79,9 80,2 79,8 80,4 80,6 80,7 82,2
2000 Hz 77,4 77,8 77,7 78,3 78,1 77,7 79,2
4000 Hz 73,4 73,7 73,8 73,9 74,2 74,4 75,9
8000 Hz 68,2 68,6 68,9 69,1 69,4 69,6 71,1
Total dB(A) 85,5 86,0 86,0 86,0 86,0 86,5 88,0
These units are equipped as standard with a leak detector that
from a certain concentration of gas (parametrizable) activates
a PROTECTION MODE until the mitigation of the leak (see the
chapter on “Safety elements”.
50FC 020 028 037 040 045 047
Refrigerant charge per
circuit (kg)
7,20 7,47 9,90 9,90 10,17 10,44
Minimum area (m
2
) 34,5 37,1 65,2 65,2 68,8 72,5
50FC 052 058 062 070 074 086 093
Refrigerant charge per
circuit (kg)
5,63 5,76 5,85 9,00 9,14 9,14 9,23
Minimum area (m
2
) 21,0 22,1 22,8 53,9 55,5 55,5 56,6
0,6m
0,6m
0,6m
0,6m
50FC 052 - 093
This indication is only here to help our customer to identify the
limits of the
fl
ammability risk.
But there is no risk of explosion linked to the used of A2L refrigerant
due to the machine itself.
Note (the following information is provided by the manufacturer
exclusively for informational purposes. The application of the
following directives relies exclusively upon the user):
According to directives 2009/104/EC and 1999/92/EC, these zones
might be quali
fi
ed by the user as ATEX Zone based on the user’s
own risk analysis for which the user remains solely responsible.
According to the de
fi
nition of Annex I of directive 1999/92/EC,
this zone might be classi
fi
ed Zone 2 because it might be a place
in which an explosive atmosphere consisting of a mixture of air
with
fl
ammable substances in the form of gas is not likely to occur
in normal operation but, if it does occur, will persist for a short
period only.
In case an additional equipment is necessary (motorized valve,
pump, etc.…), it must be:
■
installed out of de
fi
ned potentially
fl
ammable zone;
■
quali
fi
ed as a non-ignition source for the
fl
uid used.