All Heating Mode (Operation Of Heating Only) - Carrier MMY-MAP0724FT9UL Service Manual

5-3. All Heating mode (Operation of heating only)

Outdoor header unit (MMY-MAP0964FT
PMV2
PMV1
PMV4
TE1
TE2
SV
SV
SV5
SV
TL
SV6
Oil separator
Fusible
plug
FP
SV3D
SV
Liquid
SV41
tank
SV
TD1
SV14
Check
joint
(Liquid
pipe)
TC2 TCJ
Outdoor Unit
4-Way valve
ON
SV4(n)
SV5 OFF
Control
SV6
SV11
ON
SV14
PMV1, 2 Control
PMV4
The outdoor unit which communication line between indoor and outdoor is connected is the "Header unit".
Other outdoor units are called "Follower units".
Fan
FM
Fan motor
Right side
TO
Main
heat exchanger
Right side sub heat exchanger
Left side
Main
heat exchanger
Left side sub heat exchanger
SV11
TS1
Check joint
( High pressure)
High pressure
sensor
Fusible
plug
SV2
SV
Accumulator
SV42
High
High
pressure
High
SV
SW pressure
pressure
SW
SW
TD2 TD3
TK4
Comp. Comp.
Comp.
1 2 3
(Inverter) (Inverter)
(Inverter)
TK1 TK2 TK3
Oil header
TK5
SV3F SV
SV3B
SV
Balance pipe
Liquid pipe
Dischage gas pipe
Suction gas pipe
TC1 TC2 TCJ
Heating
Control
SV3A Heatling thermo ON
Control
SV3B
Control
SV3C
Control
SV3D
SV3E ON
Control
SV3F
Outdoor fan
Control
(14 Ton system described in the example of (8 Ton + 6 Ton))
∗
UL) Outdoor follower unit (MMY-MAP0724FT
PMV2
PMV1
PMV4
TE2
4-way
w SV5
valve
pressure
sensor
Check
joint
(Low
TS2
pressure
Fusible
FP
plug
FP
Liquid
tank
SV43
SV
SV14
Check
joint
(Liquid
pipe)
TC1 TC2 TCJ
Heating
FS unit / indoor unit
Heatling thermo OFF
SVD ON SVD
SVS OFF SVS
OFF
SVDD SVDD
SVSS OFF SVSS
PMV Control PMV
High-pressure gas refrigerant
Condensed liquid refrigerant
Evaporative gas refrigerant (Low pressure)
– 54 –
FM
Fan motor
Right side
Main
heat exchanger
Right side sub heat exchanger
Left side
Main
heat exchanger
TE1
Left side sub heat exchanger
SV
SV
Check joint
SV6
( High pressure)
High pressure sensor
Oil separator
SV2
SV
SV3D
SV
SV41
SV42
High
pressure
SV
High
SW
pressure
SW
TD1 TD2
TK4
Comp. Comp.
2
1
(Inverter) (Inverter)
TK1
TK2
Oil header
TK5
SV3B
SV
TC1 TC2 TCJ
Heating
thermo OFF
Stop
ON OFF
SVD
OFF SVS OFF
OFF
OFF
SVDD
OFF SVSS
ON
OFF
PMV Close
Pressure circuit (High-pressure refrigerant)
Low-pressure circuit (Refrigerant recovery line)
∗
UL)
Fan
TO
4-way
valve
Low
pressure
TS1
sensor
Check
joint
(Low
TS2
pressure
Fusible
FP
plug
Accumulator
SV
TC1
Stop