Typical Unit Piping - Carrier RHV090-120 Installation Instructions Manual

Typical Unit Piping

Each heat pump system includes two compressors, a re-
versing valve, dual-function outdoor and indoor coils, a
common liquid line with bi-flow TXV, and dedicated cooling
and heating TXVs. RHV090-102 units outdoor coils contain
a vapor header check valve. RHV090-120 unit indoor coils
contain a vapor header check valve. See Fig. 51-56 and
Tables 14-19 for typical unit piping schematic parallel coil
circuits during evaporator-function
converging coil circuits during the condenser-function
operation.
Table 14 — RHV090-102 – Cooling Mode
COMPONENT
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Check Valve E
Check Valve F
Table 15 — RHV090-102 – Heating Mode
COMPONENT
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Check Valve E
Check Valve F
Table 16 — RHV090-102 – Defrost Mode
COMPONENT
Defrost Thermostat
Outdoor Fan(s)
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Check Valve E
Check Valve F
RHV-090-120-01SI
operation and
STATUS/POSITION
Energized
Closed
Open
Open
Open
Closed
Closed
STATUS/POSITION
De-energized
Open
Closed
Closed
Closed
Open
Open
STATUS/POSITION
Closed
Off
Energized
Closed
Open
Open
Open
Closed
Closed
Specifications subject to change without notice.
Table 17 — RHV120 – Cooling Mode
COMPONENT
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Check Valve E
Check Valve F
Table 18 — RHV120 – Heating Mode
COMPONENT
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Check Valve E
Check Valve F
Table 19 — RHV120 – Defrost Mode
COMPONENT
Defrost Thermostat
Outdoor Fan(s)
Reversing Valve
Check Valve A
Check Valve B
Check Valve C
Check Valve D
Check Valve E
Check Valve F
STATUS/POSITION
Energized
N/A
Open
Open
Open
Closed
Closed
STATUS/POSITION
De-energized
N/A
Closed
Closed
Closed
Open
Open
STATUS/POSITION
Closed
Off
Energized
N/A
Open
Open
Open
Closed
Closed
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