LG Therma V Series Installation Manual page 55

Terminal Block Information (3Ø Electric Heater)
Symbols used below pictures are as follows :
- L, L1, L2 : Live (230V AC)
- N : Neutral (230V AC)
- BR : Brown , WH : White , BL : Blue , BK : Black
Terminal Block 1
energizing water
pump for solar
thermal system
3WAY VALVE
(B)
1 2 3
L L1 N
BR WH BL
water flow switching between using
solar thermal heating and skipping
solar thermal heating
Terminal Block 2
opening or closing
water flow for FCU
OUTDOOR UNIT
11 12 13 14
1(L) (2(N) 3 L1
(BR) BL BK BR
Power supply for Indoor
unit and communication
Terminal Block 3
connecting external electric
power supply for sanitary
water tank electric heater
EXTERNAL POWER
(W/TNK E/HEATER)
1 2 3
L N R
BR BL BR
connecting external electric
power supply for internal
water flow switching between
under floor heating and sanitary
water tank heating
WATER WATER
3WAY VALVE
PUMP TANK
(B) HEATER
4 5 6 7 8
L N L N L
BR BL BR BL BR
turn on or off sanitary
water tank heater
cooling
THERMOSTAT
2WAY VALVE
(Default : 230V AC)
(A)
15 16 17 18
L2 N L N
WH BL BR BL
Connection for thermostat
(230V AC)
Supporting type : Heating only or
Heating/Cooling
EXTERNAL POWER
(INTERNAL E/HEATER)
4 5
S T
BK GY
electric heater
Piping and Wiring for Indoor Unit
(A)
9 10
L1 N
WH BL
19 20
L1 L2
WH BK
Terminal
Block 1
Terminal
Block 2
Terminal
Block 3
Installation Manual 55