Disable cooling mode on Carrier mini-split head?

7 years ago

I'm interested in getting a mini-split heat pump system. Part of it would be in the basement, which is living space. The man who sells Carrier units says he cannot put a head down there because it would require a pump for the condensate that is produced in cooling model, and a pump will not fit on a unit mounted on a block wall, which is what we have there.

However, we would never need to run it in cooling mode there, as it never gets hot on that level. But he is worried that someone will mistakenly put it in cooling mode, resulting in flooding.

My idea is to somehow disable the cooling mode, so that is not a concern. Would that be possible? He doesn't seem to think so.

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Comments (2)

mike_home
7 years ago
I am not familiar with the Carrier ductless systems. But I would think you would be able to disable the cooling mode at the thermostat. It should not be too difficult to wire it as heating only.
sktn77a
7 years ago
Carrier heatpumps (split systems) have a wire at the thermostat to energize the reversing valve for cooling (usually the "O" connection). If your minisplit thermostat is wired the same ("legacy"), you can simply disconnect this wire. If the minisplit thermostat has serial communications ("digital"), then this may be more difficult as you would need to program it in the thermostat, if possible. Your dealer should be able to find this out from Carrier or their local distributor.
Tom VZ thanked sktn77a
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