Carrier 50FF Series - Cooling Recovery Circuit (BA and BB Assemblies)

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12 - FACTORY OPTIONS AND ACCESSORIES
12.10 - 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 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.
Access to the recovery circuit
The charging valve (schrader type) must
be used to adjust the refrigerant charge
of the recovery circuit when this one is
lower than required. It’s placed on the
liquid line before the dryer fi lter.
In models 100 to 170, the charging
valve can be accessed via the
compressors box on circuit 2, removing
the communication panel between both
circuits.
Models 100 to 170
Characteristics of the recovery circuit
Main circuits
draining
Recovery
circuit draining
50FF/FC
100 to
120
130 to
145
160 to
170
180 to
220
250 to
280
Compressor type Scroll
No. of compressors / circuits 1 / 1
Max. absorbed
current
(A) 13,7 18,7 21,7 24,0 27,5
Oil type
Copeland 3MAF 32cST, Danfoss POE
160SZ, ICI Emkarate RL 32CF, Mobil
EAL Artic 22CC
Volume of oil (l) 3,0 3,3 3,3 3,3 3,6
Charge of R-410A (kg) 5,3 6,4 6,4 7,6 11,9
Environm. impact (tCO2eq) 11,1 13,4 13,4 15,9 24,8
Communication panel
between circuits 1 and 2
Charging
valve
Models 180 to 280
Recovery compressor
Recovery
compressor
Adjusting the refrigerant charge
Access panel to circuit 1
and recovery circuit
Access panel
to circuit 2