Cycle Diagram - LG THERMA V Installation Manual

GENERAL INFORMATION
36

Cycle Diagram

<Refrigerant Side>
S2
S5
S3
EEV
Description
Category Symbol
S1
S2
S3
S4
Refrigerant
side
S5
S9
S10
EEV
S11
S12
S13
S17
Water Side
A1
A8
A9
Pressure
Sensor
Pressure
Switch
Muffler
S1
S4
S9
S10
<Inside of Split Product>
Meaning
Compressor-suction pipe temperature sensor
Outdoor air temperature sensor
Outdoor-HEX temp. sensor
Compressor-discharge pipe temperature sensor
Outdoor-HEX middle temp. sensor
PHEX gas temp. sensor
PHEX liquid temp. sensor
Electronic Expansion Valve (Heating)
Inlet water temperature sensor
Outlet water temperature sensor
Backup heater outlet sensor
Flow sensor
Main water pump
Electric backup heater (Step 1)
Electric backup heater (Step 2)
<Water Side>
Air Vent
S12
Expansion Tank
Relief
valve
Water
Out
Air Vent
S17
Water In
A1
Flow
[PHE]
Sensor
: Cooling
: Heating
<Indoor Unit>
A8/A9
S13
Pressure Sensor/
Pressure Gauge
S11
Strainer
PCB Connector
CN_SUCTION_GR
CN_AIR_YL
CN_C_PIPE_VI
CN_DISCHARGE_BK
CN_MID_BR
CN_PIPE/OUT
CN_PIPE/IN
CN_EEV1
CN_TH3
CN_F_METER
CN_MOTOR1
CN_W_PUMP_A
CN_E_HEAT_A
CN_E_HEAT_B