Lennox Unit Additional Charge R410a

[Gaz6388]

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

[Brian_UK]

Lennox tech document here might help, table 6 gives data but you need to check your pipe lossess.

https://www.google.co.uk/url?sa=t&source=web&rct=j&url=http://www.mechanicalconceptsllc.com/downloads/Refrigerant%2520Piping%2520Manual.pdf&ved=0ahUKEwjV98G8iczQAhUkIsAKHUGlBa8QFggaMAA&usg=AFQjCNERG_vYPWXmxfz5cDLXvRVelcfU7A&sig2=BDOWh7t3mjyFMw7QVFnb8g

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.

[Gaz6388]

Cheers mate.