Carrier WeatherMaker 50KCQ A06 Series - Reversing Valve and Checking Valve Position; Troubleshooting Refrigerant Pressure Problems and Check Valves; Metering Devices

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Fig. 14 — Typical Unit Piping Schematic (with TXV valves on Indoor Coils)
Reversing Valve and Checking Valve Position
See Fig. 14.
Troubleshooting Refrigerant Pressure Problems
and Check Valves
Refer to Fig. 14, above, and the Cooling Mode and Heating
Mode tables (Tables 3 and 4) above. See Table 5 for defrost
mode.
Metering Devices
See Fig. 15-17 for typical metering diagrams.
B
Acutrol
DFT 1
Cooling Liquid Line
A
D
Outdoor Coil
Indoor Coil
C
Heating Mode Liquid Line
Strainer
Filter
Drier
LPS/LOC
Accurater
(all 3, 4, and
5 ton units)
Accurater
(3 and 4 ton units only)
Acutrol
COMPRESSOR
ACCUMULATOR
HPS
Check Valve
* Schematic shown in Heating Mode.
Table 3 — Cooling Mode (each circuit)
COMPONENT STATUS/POSITION
Reversing Valve Energized
Check Valve A Closed
Check Valve B Open
Check Valve C Closed
Check Valve D Open
Table 4 — Heating Mode (each circuit)
COMPONENT STATUS/POSITION
Reversing Valve De-energized
Check Valve A Open
Check Valve B Closed
Check Valve C Open
Check Valve D Closed
Table 5 — Defrost Mode
A04-A06 Circuit 2
COMPONENT STATUS/POSITION
Defrost Thermostat Closed
Outdoor Fan(s) Off
Reversing Valve Energized
Check Valve A Closed
Check Valve B Open
Check Valve C Closed
Check Valve D Open