898150-UIM-B-0113
6 Johnson Controls Unitary Products
TABLE 6:
Refrigerant Line Set Requirements
Outdoor Unit
Capacity
(Btu/hClass)
Number of
Indoor Units
Maximum length of
Line Set (each
Indoor Unit) (m)
Total Line Set
Length (All Indoor
units combined) (m)
Maximum Elevation
between outdoor unit and
each indoor unit (H1) (m)
Max Elevation Between
Indoor Unit and another
Indoor unit feet (m)
Additional
Charge − Ounces
per Feet (g/m)
18K (2-zone)
1 33 (10) 33 (10)
16½ (5) 16½ (5)
0.22 (20)
2 33 (10) 66 (20)
24K (3-zone)
1 / /
33 (10) 16½ (5)
2 66 (20) 132 (40)
3 66 (20) 198 (60)
30K (4-zone)
1 / /
2 66 (20) 132 (40)
3 66 (20) 198 (60)
4 66 (20) 230 (70)
42K (5-zone)
1 / /
49 (15) 25 (7.5) 0.2365 (22)
2 82 (25) 164 (50)
3 82 (25) 246 (75)
4 82 (25) 262 (80)
5 82 (25) 262 (80)
Note − All outdoor units come from the factory with refrigerant charge to accommodate up to 25 feet (7.5 meters) of lineset. This base charge will
accommodate the number of zones that the specific outdoor unit is capable of supporting.
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