View Full Version : Lennox Unit Additional Charge R410a

28-11-2016, 05:41 PM
Does anybody know how many grams per meter is required for a Lennox unit? System model is TPA04854N41T this unit is factory charged to 15feet which is 4.5meters at 5.299kg and my liquid line pipe run is 17 meters on 3/8. Cheers

28-11-2016, 06:36 PM
Lennox tech document here might help, table 6 gives data but you need to check your pipe lossess.


Lennox manuals for the TPA also relate correct charge to subcooling so check your unit manual, if you haven't got one try Lennox or Google.

05-12-2016, 10:39 AM
Cheers mate.