Carrier 48EZ(N)-A Installation Instructions Manual page 37

HP S
LEGEND
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater Metering De vice
®
Arrow indicates direction of flo w
HP S
LEGEND
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater Metering De vice
®
Arrow indicates direction of flo w
WARNING
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal injury
or equipment damage.
This system uses Puron (R- -410A) refrigerant which has
higher operating pressures than R- -22 and other refrigerants.
No other refrigerant may be used in this system. Gauge set,
hoses, and recovery system must be designed to handle Puron.
If you are unsure, consult the equipment manufacturer.
OUTDOOR COIL
Fig. 25 - - Typical Heat Pump Operation, Cooling Mode
OUTDOOR COIL
Fig. 26 - - Typical Heat Pump Operation, Heating Mode
TXV in Metering
Position
LCS
Bypass
Position
TXV in Bypass
Position
LCS
Metering
Position
Refrigerant System
This information covers the refrigerant system of the 48EZ- -A,
including the compressor oil needed, servicing systems on roofs
containing synthetic materials, the filter drier and refrigerant
charging.
Compressor Oil
If additional oil is needed use Uniqema RL32- -3MAF. If this oil is
not available, use Copeland Ultra 32CC or Mobil Artic EAL22CC.
This oil is extremely hygroscopic, meaning it absorbs water
readily. POE oils can absorb 15 times as much water as other oils
designed for HCFC and CFC refrigerants. Take all necessary
precautions to avoid exposure of the oil to the atmosphere.
37
INDOOR COIL
C03011
INDOOR COIL
C03012