Installation check list
Configuration
System Design
Applications
Introduction
• System diagram
DHW tank
DHW
Temp. sensor
IDU
DHW tank
DHW
Temp. sensor
IDU
Purpose: DHW exclusive op Booster heater
.
DHW operation by using solar heat as auxiliary heat source.
• Necessary configuration and feature
Dip s/w
Separate setup is required
Dip s/w No. 2: Off / No. 3: On
Remote controller
Use the default one attached to indoor
unit
No installation required
Leaving water tempera-
ture
Set up by remote controller
Single temperature
control
Control of DHW temperature sensor
DHW temperature sensor
Installation
Temperature sensor that came with
DHW tank needs to be installed.
Tank applied with solar
coil
Tank applied with solar coil needs
to be purchased
Installing solar tem-
perature sensor
Optional sensor needs to be pur-
chased and installed
Installing 3Way v/v
To be purchased and installed
separately
Booster heater
If applied, and tank kit is not used
Separate option
• Dip s/w Setting
OFF
ON
1
2
3
4
5
6
7
8
• Installing temperature sensor and 3Way v/v
Connect solar thermal sensor to ‘CN_TH4’(Red connector) of the indoor unit PCB.
If the DHW tank sensor is connected, disconnect the sensor from PCB first.
Separate connector and set up is required when installing both DHW temperature sensor and solar
temperature sensor simultaneously
(2pin for hot water, 2pin for solar)
energizing water
pump for solar
thermal system
water flow switching between
under floor heating and
DHW tank heating
water flow switching between using
solar thermal heating and skipping
solar thermal heating
turn on or off DHW
tank heater
3WAY VALVE
(B)
WATER
PUMP
(B)
WATER
TANK
HEATER
3WAY VALVE
(A)
L
L1
N
L
N
L
L
L1
N
N
1
2
3
4
5
6
8
9
7
10
044
045
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COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
12. System 12
