![background image](http://html.mh-extra.com/html/carrier/50fc-020-099/50fc-020-099_installation-operation-and-maintenance-instructions_2563300064.webp)
64
12 - FACTORY OPTIONS AND ACCESSORIES
12.15 - Cooling recovery circuit (BA and BB
assemblies)
Thermodynamic circuit dedicated to the recovery of the extracted
air energy, with independent and proportional control, adapted to
the air renewal requirements in order to raise the COP and EER
of the unit.
■
The circuit is composed of:
- Return EC plug-fan.
- Air circuit comprised of coils with copper pipes and aluminium
fi
ns.
- Electronic expansion valve.
- Hermetic scroll-type compressor with sound insulation,
assembled over antivibration mounts.
- Crankcase heater.
- Four-way cycle reversing valve.
- Anti-acid dehydrator
fi
lter.
- High and low pressure transducers.
- Condensates drain pan, with a 1/2” M gas threaded plastic
drain connection.
Models of 1 circuit (50FC 020 to 047 and 50FF 020 to 093):
Access to the recovery circuit
The charging valve, placed on the liquid line, is accessed via
the compressors box on circuit 2, removing the communication
panel between both circuits.
The charging valve (schrader type) must be used to adjust
the refrigerant charge of the recovery circuit when this
one is lower than required.
Characteristics of the recovery circuit
Main
circuit(s)
draining
Recovery
circuit
draining
Charging valve
Recovery
compressor
Access panel to compressors
box on circuit 1
Access panel to compressors
box on circuit 2
Recovery
compressor
Models of 2 circuits (50FC 052 to 099):
Charging
valve
Access panel to
compressors box on circuit 2
Position of the condensate drain
50FF/FC
020 to
028
037 to
047
052 to
062
070 to
099
Type of refrigerant
R-410A
Charge of R-410A (kg)
1,7
2,5
3,0
3,4
Environm. impact (tCO2eq)
3,5
5,2
6,3
7,1
Volume of oil
(l)
0,7
1,2
1,7
1,8
Oil type
Copeland 3MAF 32cST, Danfoss
POE 160SZ, ICI Emkarate RL 32CF,
Mobil EAL Artic 22CC
50FC
020 to
028
037 to
047
052 to
062
070 to
093
Type of refrigerant
R-454B
Charge of R-454B (kg)
1,9
2,3
2,7
3,1
Environm. impact (tCO2eq)
0,9
1,1
1,3
1,4
Volume of oil
(l)
1,24
1,24
1,24
1,72
Oil type
Copeland 3MAF 32cST, Danfoss
POE 160SZ, ICI Emkarate RL 32CF,
Mobil EAL Artic 22CC
Summary of Contents for 50FC 020-099
Page 78: ...78 Notes ...
Page 79: ......