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Charging
Charging
I Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a
7.5m(25ft) line set for each indoor line.
Any time total line set is used either shorter or longer then the nominal 22.5m(75ft: for tri-zone)
line set length the refrigerant charge has to be adjusted.
I Whether the line set is made shorter or longer you must adjust the charge based on how many ft
of tubing are either added or removed based on 30g(0.32oz) of R-22 per meter(foot).
Max total
Capacity
length of all
(Btu/h)
pipes (A+B+C)
45m
36k
(150ft)
Example:
A 80ft line set is used for tri - zone 5 additional ft X 0.32 ounces per foot= add 1.6
ounces of R-22
Important:
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using
the unit nameplate charge adjusting for line sets longer or shorter than 7.5m(25ft) for each indoor
unit.
22 Room Air Conditioner
Max length of
Min length of
each pipe
each pipe
(A/B/C)
(A/B/C)
15m
3m
(50ft)
(10ft)
Max Elevation
Max elevation
between each
between
indoor unit and
indoor units
outdoor unit (h1)
(h2)
7.5m
7.5m
(25ft)
(25ft)
Additional
Refrigerant
30g/m
(0.32oz/ft)
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