Lennox Mini-Split Service Manual / Page 79
PIPING LIMITATIONS
OUTDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT
INDOOR UNIT
Maximum Line Set
Length
Maximum Line Set
Length
Maximum
Elevation -
Outdooor
Unit BELOW
Indoor Unit
Maximum
Elevation -
Outdooor
Unit ABOVE
Indoor Unit
Outside Unit BELOW Indoor Unit Outside Unit ABOVE Indoor Unit
System Size
(KBtu)
Line Set Diameters
(in.)
Maximum Line Set
Elevation
Outdoor Unit Below
ft. (m)
Maximum Line Set
Elevation
Outdoor Unit Above
ft. (m)
Maximum Line
Set Length
ft. (m)
Liquid Gas
09 1/4 3/8 40 ft. (12 m) 40 ft. (12 m) 82 ft. (25 m)
12 1/4 1/2 40 ft. (12 m) 40 ft. (12 m) 82 ft. (25 m)
18 1/4 1/2 66 ft. (20 m) 66 ft. (20 m) 98 ft. (30 m)
24 3/8 5/8 82 ft. (25 m) 82 ft. (25 m) 164 ft. (50 m)
36 3/8 5/8 98 ft. (30 m) 98 ft. (30 m) 213 ft. (65 m)
48 3/8 5/8 98 ft. (30 m) 98 ft. (30 m) 213 ft. (65 m)