LG ARNH963K2A2 Installation Manual page 21

Precaution when connecting Heat Recovery systems
Ø15.88
Gas pipe
Ø9.52
Liquid pipe
Welding type
DIP S/W setting
No Hydro kits
connected
No.1, 2 Valve
Control
No.2, 3 Valve
Control
No.3, 4 Valve
Control
No.1, 2 Valve
/
No.3, 4 Valve
Control
Pipe searching process
1. When Pipe searching process is performed,
- Use ʻMode 1ʼ if water temperature is higher than 30℃(86℉)
- Use ʻMode 2ʼ if water temperature is lower than 30℃(86℉)
2. When Pipe searching process is not performed,
- Check whether ʻCH14ʼ error occurs in the Hydro Kit.
For more detailed information, refer to the installation manual of Heat Recovery Unit.
- One connection of refrigerant pipe for HR unit is
insufficient for the flow of refrigerant. Join two pipes with a
branch pipe when connecting the Hydro Kit
- The pipe number of the connected gas pipe and liquid
pipe must be same.
- Flow water in the Hydro Kit when pipe-searching
process is performed.
Hydro kit
- Pipe-searching process error may occur if the pipe
temperature does not increase.
Gas pipe Ø22.2
Liquid pipe Ø9.52
- It is recommended that Hydro Kit is connected to No.1
valve and No.2 valve.
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
Example
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Indoor Unit
Hydro Kit
Indoor Unit
Hydro Kit
Indoor Unit
Hydro Kit
Indoor Unit
Indoor Unit
Hydro Kit
(When two Hydro Kit are installed)
Hydro Kit
Hydro Kit Installation Manual 21
Installation