The lengths below are the maximum lineset lengths for the given system configurations. If your installation requires a
lineset length that exceeds the pre-charged length, additional refrigerant is required. See the section Adding Refrigerant,
below, to determine how much to add.
With Additional Refrigerant
Maximum
combined
lineset length
(L
TOT
†
)
Maximum
individual
lineset length
(L1, L2, L3, L4)
Maximum
combined
lineset length
(L
TOT
†
)
Maximum
individual
lineset length
(L1, L2, L3, L4)
The factory charge for each outdoor unit is listed in the table below.
Additional Refrigerant
Required (R410-A)
Example: An IS18G050 is installed as a single-split with a 1/4” x
3/8” line set 60 ft in length.
Solution: The outdoor unit is pre-charged for a line set length of up
to 40ft. The line length that must be compensated for is 20ft (60ft -
40ft = 20ft). Select the line set size from the table at left to find the
additional amount of refrigerant to add. You must add 0.16oz/ft.
The total amount of refrigerant that must be added is:
0.16oz/ft x 20ft = 3.2oz
No additional charge of compressor oil is necessary.
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