LG THERMA V Installation Manual page 103

How to Wire 2nd Circuit (For Split)
Follow below procedures Step 1 ~ Step 2.
Step 1. Uncover front cover of the unit.
Step 2. Find terminal block and connect wire as below
13 14 15 16
L N L1 L2
MIX
MIXING VALVE
PUMP
(L) (N) (L1)
MIX
MIXING VALVE
PUMP
Step3. Insert the temperature sensor to 'CN_MIX_OUT' (Brown) of the main PCB as shown
below. The sensor should be mounted correctly to outlet pipe of mix kit water pump as
shown below.
Indoor PCB
NOTE
Temperature sensor specification:
Type : Thermistor,NTC
Resistance at 25 °C : 5 kΩ
Minimum operating temperature range : -30 °C~100 °C
17
(L) : Live signal from PCB to mix pump
N
(N) : Neutral signal from PCB to mix pump
(L1) : Live signal (for Normal* Closed type) from PCB to
mixing valve
(L2) : Live signal (for Normal Open type) from PCB to mixing
(L2) (N1)
valve
(N1) : Neutral signal from PCB to mixing valve
*Closed = NOT Mixed
CN_MIX_OUT
Buffer
Tank
ACCESSORIES INSTALLATION
[Room A] Main Zone (Low Temp.)
nd
2 circuit temp. sensor
Mix
Mix Kit
Floor heating loop
[Room B] Additional zone (High Temp.)
Radiator
103
Floor heating loop
Radiator