Installation check list
Configuration
System Design
Applications
Introduction
• System diagram
3way V/V
IDU
DHW tank
DHW
Temp.
sensor
DHW
Temp.
sensor
DHW
Temp.
sensor
Purpose: To serve the need to use a single system for Space heating/cooling and Domestic hot water.
3Way valve must be installed to enable system.
• Necessary configuration and feature
Dip s/w
Separate setup is required
2 off + 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
Select priority
1) DHW first, 2) Floor heating
Default: DHW
DHW temperature sensor
Installation
Temperature sensor that came with
DHW tank needs to be installed.
Installing 3Way v/v
To be purchased and installed sepa-
rately
Booster heater
If applied, and tank kit is not used
Separate option
Installer setting
Installer of remote controller needs to
be set up separately.
• 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 p is required when installing both DHW temperature sensor and solar temperature sensor simulta-
neously
(2pin for hot water, 2pin for solar)
Terminal Block 1
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
3WAY VALVE: 3WAY VALVE (A)
- 230 V AC SPDT 3-wire type
- SPACE HEATING: TB1'S 9 and 10 are activated
- WATER TANK HEATING: TB1's 8 and 10 are activated
024
025
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COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
5. System 5
