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Mitsubishi Electric PURY-P72 Service Handbook page 164

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Table of Contents
[ VII Control ]
Cooling/heating Circuit Control and General Function of System Equipment
-14- Cooling/heating Circuit Control and General Function of System Equipment
Operation
Schematic diagram of refrigerant circuit
status
4-way valve
Check valve
Low-
A
pressure
pipe
O
Low-pressure
gas
Cooling
M
Fan
only
Gas-liquid
separator
High-
High-pressure
pressure
liquid
pipe
Outdoor unit
Low-
A
pressure
gas
O
B
Cooling
High-
main
pressure
gas
C
High-pressure
two-phase
Low-
A
pressure
two- phase
O
Heating
only
High-
pressure
gas
Low-
A
pressure
two- phase
M
Heating
main
High-
K
pressure
gas
HWE1116D
Gas
Two-phase
Liquid
Selector valve
M
L
Low-pressure two-phase
L
M
M
L
Heat exchanger
LEV
L
M
Indoor unit
LEV
High-pressure
liquid
BC controller
Cooling
N
M
L
Low-pressure two-phase
Cooling
N
L
M
Cooling
N
M
L
Heating
F
G
H
D
E
I
High-pressure
J
K
liquid
L
M
High-pressure liquid
L
M
L
M
L
M
F
High-pressure
liquid
Heating
J
B
C
D
Heating
High-pressure liquid
B
C
D
Heating
B
C
D
Cooling
H
F
G
Low-pressure
Low-
I
gas
pressure
two- phase
High-pressure
E
liquid
- 155 -
Schematic diagram of refrigerating cycle
Pressure
L
Liquid
M
Gas-liquid mixture
J G I
D C
L
K H
M
L
M
F
C
E
F
D
K
J
G
I
Gas
A
Enthalpy
O
(energy)
F
E
B
A
N
O
A
O
B
A
H
M
GB
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