Carrier 50HCQ Installation Instructions Manual page 9

Table 2 – Heating Mode (each circuit)
Component
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
LPS/LOC
Filter
Drier
2B
1B
DFT 1
Acutrol
1A
DFT 2
2A
Outdoor Coil
Fig. 5 − Typical Unit Piping Schematic (with TXV valves on Indoor Coils)
Status/Position
De-energized
Open
Closed
Open
Closed
Cooling Liquid Lines
Reversing
Valve
HPS
Comp 2
Heating Mode Liquid Lines
o
Fig. 6 − CoreMax* Access Port Assembly
Table 3 – Defrost Mode
Component
Defrost Thermostat
Outdoor Fan(s)
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
2D
1D
Reversing
Valve
HPS
Comp 1
2C
1C Strainer
* CoreMax is a registered trademark of Fastest, Inc.
9
Status/Position
Closed
Off
Energized
Closed
Open
Closed
Open
Acutrol
Indoor Coil
C160139
o
C08453