Carrier Aquazone 50PTH024 Installation, Start-Up And Service Instructions Manual page 58

IMPORTANT: Due to the hygroscopic nature of the POE oil in
Puron refrigerant (R-410A) and other environmentally balanced
refrigerants, any component replacement must be conducted in a
timely manner using caution and proper service procedure for
these types of refrigerants. A complete installation instruction
will be included with each replacement TXV/filter drier assem-
bly. It is of critical importance these instructions are thoroughly
understood and carefully followed. Failure to follow these in-
structions can result in a system that is contaminated with mois-
ture to the extent that several filter drier replacements may be re-
quired to properly dry the system.
Airflow
Distributor
LEGEND
AP Access Point
High Pressure Switch
HPS
Insulated Piping (Only If In BOM)
LPS
Low Pressure Switch
Test Point for Water Regulating Valve
Only Present on Scroll
Compressor Models
All Pilot and Equalizer Lies 1/4" OD
Expansion Valve
Fig. 44 — Typical Refrigerant Diagram — 50PT Units
IMPORTANT: Repair of any sealed refrigerant system requires
training in the use of refrigeration tools and procedures. Repair
should only be attempted by a qualified service technician. A
universal refrigerant handling certificate will be required. Local
and/or state license or certificate may also be required.
Figure 44 illustrates the typical refrigerant diagram for 50PT units.
See Table 25 for additional troubleshooting information.
Disconnect power from unit before removing or replacing
connectors, or servicing motor. Wait 5 minutes after discon-
necting power before opening motor.
Hot Gas Line
AP*
Condenser
Coil
Equalizer Line*
Filter
Drier**
Solenoid
Reversing
Valve
Coil
Disch.
Out
AP
HPS
58
CAUTION
Water
LPS
AP
TXV Sensing Bulb
Suct. In