- 62 -
1. Heat pump
(Note 1) The above figure is a refrigerant piping system diagram for inverter pump-integrated machine.
The piping system of pumpless models lacks of the pump and check valve seen in this diagram.
Outdoor air temperature OAT
Inlet pump water pressure
PSW(S)
DGP*
CGT*1
Inlet water temperature ET
Inlet water heat exchanger water pressure
PSW(E)
SGP*
CGT*2
Middle water temperature
MT
Outlet water heat exchanger water pressure
PSW(L)
DGT*
63H*
Outlet water temperature
LT
SGT*
* indicates circuit name (A, B, C, D).
(*) Water drain valves for freeze prevention
High pressure sensor
Coil gas temperature sensor 1
High-pressure switch
Coil gas temperature sensor 2
Suction gas temperature sensor
Discharge gas temperature sensor
Low-pressure sensor
R
e
ce
iv
er
Air heat exchanger
Air heat exchanger
Air heat exchanger
Ac
c
u
m
u
la
to
r
R
e
ce
iv
er
Air heat exchanger
Electric
expansion valve
Electric
expansion valve
T
Circuit A
Circuit B
DGTA
CGTA1
CGTA2
T
T
Service
port
Service
port
Electric
expansion valve
Electric
expansion valve
Service
port
P
DGPA
P
SGPA
Service
port
SGTA
T
Solenoid valve
63HA
T
DGTB
P
DGPB
Ac
cu
m
u
la
to
r
P
SGPB
SGTB
T
63HB
T
OAT
CGTB1
T
CGTB2
T
Air heat exchanger
Air heat exchanger
Electric
expansion valve
Electric
expansion valve
CGTC1
CGTC2
T
T
Service
port
CGTD1
T
CGTD2
T
R
e
ce
iv
er
R
e
ce
iv
er
Fuslble
plug
T
DGTD
P
DGPD
Ac
c
u
m
u
la
to
r
P
SGPD
SGTD
T
63HD
Ac
c
u
m
u
la
to
r
T
DGTC
P
DGPC
P
SGPC
SGTC
T
63HC
Water heat
exchanger
Water heat
exchanger
Circuit D
Circuit C
Air vent
valve
T
MT
Water
drainage port
(*)
Water
drainage port
(*)
T
P
LT
PSW(L)
Check valve
Air vent
valve
T
P
ET
PSW(E
)
Pump
Strainer
Chilled
water
inlet
Chilled
water
outlet
Cooling
operation
Heating
operation
Refrigerant piping system diagram
Service
port
Service
port
Service
port
Co
m
p
re
s
so
r
Co
m
p
re
s
so
r
Service
port
Co
m
p
re
ss
o
r
Service
port
Service
port
Fuslble
plug
Co
m
p
re
s
so
r
Electric
expansion valve
Electric
expansion valve
Service
port
Air heat exchanger
Air heat exchanger
Solenoid valve
Solenoid valve
Solenoid valve
P
PSW(S)
Check
valve
Electric
expansion valve
Check valve
Solenoid
valve
Solenoid
valve
Electric
expansion valve
Solenoid
valve
Check valve
Check
valve
Solenoid
valve
Electric
expansion valve
Solenoid
valve
Check
valve
Check valve
Solenoid
valve
Solenoid
valve
Check valve
Electric
expansion valve
Solenoid
valve
Check
valve
Refrigerant piping drawings