Normal Operation (Hot Gas Defrost Mode) - Toshiba MMY-MAP0806HT8P Service Manual

4-4. Normal Operation (HOT GAS DEFROST Mode)

Header unit (MMY-MAP1606HT8P-E/TR)
PMV1
PMV3
TL1
TE1
TL2
TE2
SV
SV SV52
SV51
TS3
FP
Fusible SV3D
Plug
Separator
SV
Liquid tank
SV41
SV
TD1
Sub cool
heat exchanger
圧縮機
１
(ｲﾝﾊﾞｰﾀ)
Compressor
PMV4
TL3
Check joint
TC2 TCJ
Outdoor Unit
ON SV3A
4-Way valve
SV4(n) OFF(*1) SV3B
SV51/52 ON SV3C
PMV1 Close SV3D
PMV3 Close Outdoor fan
PMV4 Close
(*1) SV4 (n) of stopped compressor (n)=ON
The outdoor unit which communication line between indoor and outdoor is connected is the "Header unit".
Other outdoor units are called "Follower units".
Fan
M
Fan motor
Right side
TO
Main heat exchanger
TG1
Right side Sub heat exchanger
Left side
Main heat exchanger
TG2
Left side Sub heat exchanger
4-Way valve
TS1
Check Joint
Pressure sensor
(high pressure)
SV2
Oil
SV
SV42
Accumulator
SV3C
SV
TD2
TK4
HPS
HPS
Compressor
1
2
TK1 TK2
Oil
TK5
Header
SV3A
SV3B
SV
TC2
TCJ
TC1
Heating
Control
High-pressure gas refrigerant
Control
Control
Condensed liquid refrigerant
Control
OFF
( 28 HP system described in the example of (16 HP + 12 HP))
Follower unit (MMY-MAP1206HT8P-E/TR)
PMV1
TL1
SV
SV51
Check
Joint
Pressure sensor
TS3
(low pressure)
FP
Fusible
Plug
Liquid tank
Sub cool
heat exchanger
PMV4
TL3
Check joint
TC1 TC2 TCJ
Heating
Evaporative gas refrigerant (Low pressure)
Low-pressure circuit (Refrigerant recovery line)
− 64 −
M
Fan motor
Right side
Main heat exchanger
Left side
Main heat exchanger
TE1
SV
SV52
Check Joint
Pressure sensor
(high pressure)
SV2
SV3D Oil
SV
Separator
SV
SV41
SV3C
SV
TD1
HPS TK4 HPS
圧縮機
１
(ｲﾝﾊﾞｰﾀ)
Compressor Compressor
1 2
TK1 TK2
Oil
Header
TK5
SV3A
SV3B
SV
TC2
TC1
TCJ
Heating
Fan
TO
4-Way valve
Check
Joint
TS1
Pressure sensor
(low pressure)
SV42
Accumulator
SV
TD2
TC1
Heating