Haier IGU09 Series User Manual page 8

4. Multilink module installation requirements
(4) IDUs installation requirements
a. For the system adopting multilink technology communication,the installation of IDUs should use network structure
instead of line-type structure;
b. Do not install the IDUs in the space surrounded by metal, such as metro computer room and hospital X-ray room,
otherwise the system should adopt the wired connection.
c. Keep the IDUs more than 30 feet(10m) away from the Wifi devices in the room.
Installation Location Diagram of IDU multilink Modules