Refrigerant Flow (Individual Defrost) - Toshiba MMY-MUP0801HT8P-TR Service Manual

4-4. Refrigerant Flow (Individual Defrost)

Header Unit (MMY-MUP2401*) Defrost Unit
Fan
M
Fan motor
PMV1
Left side Left side Left side
TL1
Main heat exchanger Main heat exchanger Main heat exchanger
TE1
Left side Left side Left side
Sub heat exchanger
Sub heat exchanger Sub heat exchanger
PMV2
TE2
PMV3
TL2
TS3
High-pressure
sensor
SV3D
SV
SV
SV41
TD1
Subcool
Heat Exchanger
PMV4
TL3
Liquid side Gas side
Service valve Service valve
TC2 TCJ TC1
Heating
Outdoor Unit (Defrost Unit)
4-way valve OFF SV3D Control
PMV1 Control SV3F Control
PMV2 Control SV4(n) Control
PMV3 Control Outdoor fan Control
PMV4 Control
Fan
M
Fan motor
TO
Right side Right side Right side
Main heat exchanger Main heat exchanger Main heat exchanger
TG1
TG2
TG3
Right side Right side Right side
Sub heat exchanger Sub heat exchanger Sub heat exchanger
TE3
4-way valve
TS1
Low-pressure
sensor
Accumulator
SV3F
High- High-
SV
pressure pressure
switch switch
SV42
TD2
TK1 TK2
TC2 TCJ TC1
Heating
Outdoor Unit (Heating Unit)
4-way valve ON SV3D Control
PMV1 Control SV3F Control
PMV2 Control SV4(n) Control
PMV3 Control Outdoor fan Control
PMV4 Control
The outdoor unit which communication line between indoor and outdoor is connected is the "Header unit".
Other outdoor units are called "Follower units".
Follower Unit (MMY-MUP1401*) Heating Unit
PMV1
TL1
PMV2
TL2
TS3
SV
SV41
Subcool
Heat Exchanger
PMV4
TL3
TC2 TCJ
Heating
High-pressure gas refrigerant
Condensate liquid refrigerant
(38 HP system described in the example of (24 HP + 14 HP))
- 47 -
Fan
M
Fan motor
TO
TG1
Main heat exchanger Main heat exchanger Main heat exchanger
TE1
TG2
Sub heat exchanger Sub heat exchanger Sub heat exchanger
TE2
High-pressure
sensor
Accumulator
SV3D
SV
SV3F
High-
pressure
switch
TD1
TK1
TC1 TC2 TCJ
Heating
Evaporative gas refrigerant (Low pressure)
Low-pressure circuit (Refrigerant recover line)
4-way valve
TS1
Low-pressure
sensor
TC1