You need to get a specific wireless adapter for the TV, check with the dealer what you need. From the manual: Wireless Connectivity 802.11n Optional Adapter
TVs are not like computers where you can plug pretty much anything into them, you need to load drivers to make the WiFi hardware talk to the device. And a specialized device like a TV would not generally have the capability to load new device drivers for just any WiFi card. They have a onboard processor and operating system that is limited, they code in a connection to a specific card, and that is the card that will work with it. Some can be updated with firmware updates if the manufacturer chooses to do so.
Nice looking TV by the way, hope it runs well for you.