StirCrazy wrote:
magicbus wrote:
Peter_Crowl wrote:
magicbus wrote:
The guy who installed my house inverters explained that to operate properly an inverter requires a certain minimum length run between the inverter and the heat exchanger to operate properly. Something like 20’. He has done 3 installations for me so I tend to accept what he says.
Dave
Interesting. I have three in my house. None are that far apart. The line runs are - IIRC - 12 and 16' with the excess line coiled up behind the outside unit.
As I said, something like 20’, it was a couple of years ago. And he said he would have to coil any excess near the inverter. He preferred to bury it which is what started the discussion. Our shortest run was just long enough that there was no excess.
Dave
its probably because the standard lenth of precharged line is 20'. if he had to cut his own line, add the fittings, solder them then purge and charge them the cost would be several times more so a lot of installers are going to the precharged lines and trying to lay it out so there isnt any excess that just looks bad and showes how they did it.
Actually the other two runs were close to 40’ and he did evacuate and charge the system. He wasn’t shortcutting the installation. He explained that inverters, unlike heat pumps, had some minimum requirement for the gas to expand before it was returned to the inverter. At least that’s how I understood the explanation.
Dave
