Installing Fujitusu 15RLS3H split system – What wired remote is best for achieving accurate set points?
Fujitsu offers two wired thermostats for the 15RLS3H package. It seems like others are having problems with getting accurate temperature control using only the thermostat in the indoor unit, so I was looking to get the proper wired thermostat right away.
The two options are UTY-RVNUM and UTY-RNNUM.
The UTY-RVNUM thermostat is backlit and has a nicer looking interface, but it’s over $300 for just the remote.
The UTY-RNNUM thermostat is about half of that price, but there is a note saying 15RLS and all HFI Wall Mount type Multi-Zone systems require accessory interface kit # UTY-XCBXZ1 in order to connect the UTY-RNNUM controller.
From a functionality perspective, will they both do the same thing?
My second unrelated question is can someone help me understand the air velocity distribution chart I’ve attached? in an open floor plan, 20′ x 38′, with the unit mounted in the center of the room, “throwing” heat the long way, would you anticipate any problems? I’ve performed the heat loss calcs and the 15RLS3H will be more than sufficient in my 6a climate.
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