40
Specifications subject to change without notice.
40
Typical Unit Piping
Each heat pump refrigeration system includes a compres
-
sor, accumulator, reversing valve, dual-function outdoor coil
with vapor header check valve, cooling liquid line with a filter
drier and a check valve, dual-function indoor coil with a va
-
por header check valve, and heating liquid line with a check
valve and a strainer. Unit sizes A04-06 have a single com
-
pressor-circuit. See Fig. 52 and Tables 14-16 for typical unit
piping schematic. Dual-function outdoor and indoor coils are
designed to provide parallel coil circuits during evaporator-
function operation and converging coil circuits during the
condenser-function operation.
Fig. 52 — Typical Piping Schematic
Table 14 — 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 15 — 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 16 — Defrost Mode
COMPONENT
STATUS/POSITION
Defrost Thermostat
Closed
Outdoor Fan(s)
Off
Reversing Valve
Energized
Check Valve A
Closed
Table 14 — Cooling Mode (each circuit)
COMPONENT
STATUS/POSITION
B
Acutrol
DFT 1
Cooling Liquid Line
A
D
Outdoor Coil
Indoor Coil
C
Heating Mode Liquid Line
Strainer
Filter
Drier
LPS/LOC
Accurater
TXV
COMPRESSOR
ACCUMULATOR
HPS
Summary of Contents for RHW036-060
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