Toshiba RUAGP Series Original Owner's Manual page 65

2. Cooling only
Electric
expansion valve
Air heat exchanger
Air heat exchanger
Service
port
Solenoid valve
SGTA
T
SGPA
P
PSW(S)
Strainer
P
Chilled
water
inlet
Solenoid valve
Service
port
T
SGTC
SGPC
P
Air heat exchanger
Air heat exchanger
Electric
expansion valve
Outdoor air temperature
Inlet water temperature
Middle water temperature
Outlet water temperature
(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.
Refrigerant piping system diagram
Check valve
Solenoid
Circuit A
valve
expansion valve
Electric
expansion valve
DGPA
P
63HA
DGTA
T
Service
port
Air vent
valve
ET
T
PSW(E)
P
Water heat
exchanger
Water
drainage port
Pump
Service
DGPC
port
63HC
P
DGTC
T
Service
port
Electric
expansion valve
expansion valve
Solenoid
valve
Circuit C
Check valve
OAT Inlet pump water pressure
ET
Inlet water heat exchanger water pressure
MT
Outlet water heat exchanger water pressure
LT
Cooling
operation
Electric
Electric
expansion valve
Service Service
port port
expansion valve
(*)
expansion valve
Service Service
port port
OAT
Electric
Electric
T
expansion valve
PSW(S) High pressure sensor
PSW(E) Low-pressure sensor
PSW(L)
Discharge gas temperature sensor
Suction gas temperature sensor
- 63 -
Check valve
Solenoid
valve Circuit B
Air heat exchanger
Air heat exchanger
Electric
DGPB
P
63HB
DGTB
Service T
port
Air vent
valve
MT
T
Water heat
P
exchanger
PSW(L)
Water
drainage port
(*)
DGPD
63HD
P
DGTD
T
Service
port
Electric
Air heat exchanger
Air heat exchanger
Solenoid
valve
Circuit D
Check valve
DGP* High-pressure switch
SGP*
DGT*
SGT*
* indicates circuit name (A, B, C, D).
(*) Water drain valves for freeze prevention
Electric
expansion valve
Service
port
Solenoid valve
SGTB
T
SGPB
P
Chilled
water
outlet
T
Check
valve
LT
Solenoid valve
Service
port
T
SGTD
SGPD
P
Electric
expansion valve
63H*