Cooling Recovery Circuit (Ba And Bb Assemblies) - Carrier 50FF 020-093 Installation, Operation And Maintenance Instructions

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.
Characteristics of the recovery circuit
50FF/FC
Type of refrigerant
Charge of R-410A (kg)
Environm. impact (tCO2eq)
Volume of oil (l)
Oil type
50FC
Type of refrigerant
Charge of R-454B (kg)
Environm. impact (tCO2eq)
Volume of oil (l)
Oil type
Access to the recovery circuit
Models of 1 circuit (50FC 020 to 047 and 50FF 020 to 093):
Charging valve
64
020 to 037 to 052 to
028 047 062
R-410A
1,7 2,5 3,0
3,5 5,2 6,3
0,7 1,2 1,7
Copeland 3MAF 32cST, Danfoss
POE 160SZ, ICI Emkarate RL 32CF,
Mobil EAL Artic 22CC
020 to 037 to 052 to
028 047 062
R-454B
1,9 2,3 2,7
0,9 1,1 1,3
1,24 1,24 1,24
Copeland 3MAF 32cST, Danfoss
POE 160SZ, ICI Emkarate RL 32CF,
Mobil EAL Artic 22CC
Recovery
compressor
Models of 2 circuits (50FC 052 to 099):
070 to
Recovery
099
compressor
Access panel to compressors
3,4
box on circuit 1
7,1
1,8
The charging valve, placed on the liquid line, is accessed via
the compressors box on circuit 2, removing the communication
panel between both circuits.
070 to
093
3,1
1,4
1,72
Access panel to
compressors box on circuit 2
The charging valve (schrader type) must be used to adjust
the refrigerant charge of the recovery circuit when this
one is lower than required.
Position of the condensate drain
Main
circuit(s)
draining
Access panel to compressors
box on circuit 2
Charging
valve
Recovery
circuit
draining