basic heat pump question

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floatr

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Got a simple question on heat pump info.
Is 2 stage different or the same as 2 phase?
Can u define them please
 
iMO - Depends on the unit. Some stage 2 is a whole separate compressor. Some are same unit running at higher capacity and some are referring to supplemental electric coil heat.
 
thanks-also if i have a oversized unit that is a 5 ton instead of a 3ton(recommended) what issues will i be looking at?
 
I am not sure what two stage means in HVAC, but 2 phase is a term not used to describe 230 volts. 115 volts is single phase, 230 volts is 2 phase (but electricians don't use that term) and three phase power can be either 230 or 460 and higher volts. Single phase = one hot one neutral. Two phase = two hots no neutral and Three phase = three hots no neutral.
 
With an oversized unit you will experience short cycling of the unit. Kinda like killing a fly with a sledge hammer.
 
With an oversized unit you will experience short cycling of the unit. Kinda like killing a fly with a sledge hammer.
Click to expand...
You will also have a hard time removing the humidity by short cycling while cooling.
 
ok thanks.
can i tell easily and for certain by putting the 2 40 amp fuses in (required for 3 ton) instead of the current 2 60s in now(required for 5 ton) and turning on the Aux heat ? .Its a 2 stage unit though .and has a second set of 60 amps for 9.5 kw heat kit(correct size )

if its 5ton would it then pop the 40amp ac side fuses?
 
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