Thanks for the reply. My 410 experience is limited. My tried and true methods of verifying charge (on HPs in HP weather) aren't adding up with the 410 splits. Roof tops, obvio...
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Just to clarify, I've installed heat pumps when the ambient is in the upper 30s/low 40s. When i know the factory charge and what needs to be added per 15' of lineset etc. But I'...
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In heat pump mode...If it's a new install it's a no brainer. What I'm talking about is a unit you are not familiar with and need to get running.
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