Emergency Operation (Cooling Operation Under Header Outdoor Unit Backup Scenario) - Toshiba MMY-MAP0804HT8JP Service Manual

4-4. Emergency Operation (Cooling Operation under
Header Outdoor Unit Backup Scenario)
Leakage from PMV:
Liquid-side service valve
H e a d r e u i n
= Full closure
PMV1
PMV2
TE1
PMV4 TE2
Pressure sensor
(high pressure)
SV3D
TL
SV
SV41
SV
Liquid tank
TD1
HPS
Compressor
1
TK1
SV3A
Balance pipe packed valve
Gas-side service valve
= Full opening
= Full closure
PMV
TC2
TCJ
Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication
line is connected. All other outdoor units are called "follower units".
Failure
( t M M - Y M A P 1 6 0 4 ) *
FM
TO
4-Way valve
TS1
SV6
SV
SV
Pressure sensor
SV2
(low pressure)
O.S.
Accumulator
SV
SV
SV42
SV3C
SV43
HPS
TD2
TD3
HPS
TK4
Compressor Compressor
2 3
TK2
TK3
TK5
SV3E
SV
SV3F
SV3B
SV
Balance pipe
Liquid pipe
Gas pipe
Gas pipe
Liquid pipe
PMV
TC
TC2
TCJ
High-pressure gas or condensate liquid refrigerant
Evaporative gas refrigerant (low-pressure gas)
Normal refrigerant line
Refrigerant recovery line
Set Up as Temporary
Header Unit during
Emergency Operation
F l o
PMV1
PMV2
TE1
PMV4 TE2
Pressure sensor
(high pressure)
SV3D
TL
Liquid tank
SV3A
PMV
TC1
TC2
TCJ
Indoor unit
– 65 –
o l w r e u i n ( t M M - Y M A P 1 6 0 4
FM
4-Way valve
SV6
SV
SV
SV2
O.S.
SV
SV41
SV
SV
SV42
SV3C
TD1
TD2
HPS
HPS
HPS
TK4
Compressor Compressor Compressor
1 2 3
TK2
TK1
TK3
TK5
SV3E
SV SV3F
SV3B
SV
PMV
TC1
TC2
TCJ
(The diagram shows a 32 HP system
(16 HP + 16 HP) as an example.)
) *
TO
TS1
Pressure sensor
(low pressure)
Accumulator
SV
SV43
TD3
TC1