Danfoss tp9000

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I have Danfoss tp9000 downstairs with a ts2 sensor and a tp5000 upstairs. Saw a topic about this and think I’m right but wanted to check
If I get starter kit I can replace the tp9000 with the extensions kit . Replace the tp5000 with the wireless thermostat then buy another thermostat to replace the ts2.
Do I need to wire the thermostat for ts2 or will it work wirelessly ?
Also got conventional water tank. Is that ok?