Will it work, yes. A compressor doesn't really care what its compressing so long as it can be compressed. Will it cool at its rated capacity, no.

 

Not sure I'm grasping what exactly you are saving by doing this?

 

How is putting 407 in a 410 compressor saving the customer money?

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Just put the R410A condenser in, reuse the indoor unit, and change out the indoor metering device to R410A.

 

A 410a compressor running 407C will lose about 35% capacity.

beenthere's solution is your best bet.

 

410 conversion to 407. Why 35% Efficiency loss?



Will the 407 pump out at the higher pressure in a 410 condensing unit because of mechanical design, inability to remove heat.... or will the 407 control the pressure because of characteristics? Will the condenser coil not remove heat and liquify the 407. Need logical answers for my mind. If the evap coil works well with the 407, "why" will it loose 35% efficiency. Has anyone tried it? or is this pen and paper calculations?...terry

 

https://www.marsdelivers.com/products/1009/13-SEER-Horizontal/

 

build a ramp/ stairway going over it …. cheaper and easier , and looks great too ….

 

I know this is an old thread. The answers remind me of my wife. Never can answer a question. Don't need to help anyone, no advice needed, no reason to ask why I need the answer please. Can you put a dry r410 condensing unit on an existing r407 system, re-fill with r407? and would the efficiency drop excessively? Ty...terry

 

Can you relocate the condensing unit to the roof? I have come to prefer that for a number of good reasons.

You can use the R-407C in the R-410 system - IF it has a piston metering device.

If there is a TXV - that will have to be changed to R-407 as well.

When you are choosing the new TXV bear in mind that the system capacity will be 33% lower than it is with R-410.

If it is 3 tons now - it will be 2 tons after the refrigerant change. Piston or TXV - 1/3 less BTU capacity.

PHM
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410 to 407 Conversion Question

I'm a new member. Can you put a dry r410 condensing unit on an existing r407 system, re-fill with r407? and would the efficiency drop excessively? Have an auction for cheap lennox 3.5T heat pump units, want to put on existing 407 systems without modifications. Can it be done without severely limiting efficiently. I own the properties. Not customers. Know there is no warranty. Is there an extreme physical difference in the two compressors?


I realize the operating pressures are radically different. Is this because of the refrigerant properties or the compressor and condensing unit? Would 407 work close to its normal pressures with a 410 condensing unit? Are the compressors radically different, or what is the reason for inability to remove and absorb the heat? I just need a reason as to why it is a bad idea as some say...terry

 

Will the 407 pump out at the higher pressure in a 410 condensing unit because of mechanical design, inability to remove heat.... or will the 407 control the pressure because of characteristics? Need logical answers for my mind. If the evap coil works well with the 407, "why" will it loose 35% efficiency. I'm putting in a 42000 btu condenser on a 36000 btu system. Has anyone tried it? or is this pen and paper calculations?...terry

 

I'm putting in a 42000 btu condenser on a 36000 btu system. Has anyone tried it? or is this pen and paper calculations?...terry

It has been done by several people on here and works well.
Poodle Head Mikey was the first.
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"Is this before or after you fired the parts cannon at it?" - senior tech

 

To understand correctly, the 410 condenser unit will have 35% more efficiency when using 407 in removing the heat than the existing 407 condenser. Is this correct? The 407 will liquify and go to evap at a lower pressure. I'm putting a 42K btu 410 condenser on a 36K btu system to increase fluid capacity. Same oil. What will happen?

 

the capacity will go DOWN, 35% + or - .

Why are you even attempting this?

 

Respectfully, a real HVAC contractor would know this. If not, you shouldn't be out there working on HVAC.

This is why our industry is under-respected, too many of us are not very professional or knowledgeable.

I'm closing the thread.