Overview; Cycle Diagram - LG THERMA V Split Comprehensive Application And Installation Manual

1. Overview

System capable of space cooling, heating and providing DHW AWHP stands for "Air to Water Heat
Pump" and generally refers to Therma V system.
• Split model
Ref. Pipes
Ref. Pipes Ref. Pipes
[Outdoor unit]
[Outdoor unit]
[Outdoor unit]
• Monobloc model
Water Pipes
Water Pipes Water Pipes
• Application
[Floor heating]
[FCU]
[Floor heating] [Floor heating]
[FCU] [FCU]
008
_COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
Main components:
[Indoor unit]
[Indoor unit] [Indoor unit] Heat exchanger (Refrigerant-Water)
Water pump
Electric heater / Strainer
Safety valve / Flow switch
Expansion tank / Remote controller
Water Pipes
Water Pipes Water Pipes
Main components:
Heat exchanger (Refrigerant-Water)
Water pump
Electric heater(Option)
Strainer/ Safety valve
Flow switch/ Expansion tank
Remote controller
[Radiator] [Hotwater]
[Hotwater]
[Radiator] [Radiator] [Hotwater]

2. Cycle Diagram

LIQUID SIDE
Service
Indoor Unit
Valve
Plate Heat
(3 way)
Exchanger
Th2
Water. Out
Water. In
Th3
GAS SIDE
TH1
Service
(Accessories)
Valve
(3 way)
Accumulator
Table of sensors
Category Symbol Meaning
Remote air temperature
Th1
sensor
Indoor
Inlet evaporator temperature
Unit Th2
sensor
Outlet evaporator temperature
Th3
sensor
Compressor-suction pipe
Th4
temperature sensor
Compressor-discharge pipe
Th5
temperature sensor
Condenser temperature
Th6
Outdoor
sensor
Unit
Outdoor air temperature
Th7
sensor
Condenser middle temperature
Th8
sensor
EEV Electronic Expansion Valve
EEV
TH6 TH7
Outdoor Unit
Heat Exchanger
TH8
TH4
Pressure 4 way
Sensor Valve
TH5
Compressor
rd
[Product : Split 3 ]
PCB Connector Remarks
- Optional accessory (being sold
CN_ROOM separately)
- Not shown in diagram
- Meaning is expressed based on
CN_PIPE_IN
Cooling mode.
CN_PIPE_OUT
CN_SUCTION
CN_DISCHA
- Description is expressed based on
CN_C_PIPE
Cooling mode.
CN_AIR
CN_MID
CN_LEV1
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LG Electronics