suction riser to maintain minimum velocity at minimum capacity. Recommended line length is 50' or less. If more than 50' line set is required, contact Technical Services at (419)
Table 2 shows the diameters for line sets up to 100' although vertical lift applications and trapping require- ments need to be reviewed with Technical Services for line sets over 50'.
Refrigerant Line Set Diameters (in.)
Liquid Line
BTUH | Line Set Length and Size |
| ||||
|
|
|
|
|
| |
12 ft. | 25 ft. | 50 ft. | 75 ft. | 100 ft. |
| |
|
| |||||
18,000 | 3/8 | 3/8 | 3/8 | 3/8 | 3/8 |
|
|
|
|
|
|
|
|
24,000 | 3/8 | 3/8 | 3/8 | 3/8 | 3/8 |
|
30,000 | 3/8 | 3/8 | 3/8 | 3/8 | 1/2 |
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|
|
|
|
|
|
|
36,000 | 3/8 | 3/8 | 3/8 | 3/8 | 1/2 |
|
42,000 | 3/8 | 3/8 | 3/8 | 1/2 | 1/2 |
|
|
|
|
|
|
|
|
48,000 | 3/8 | 3/8 | 3/8 | 1/2 | 1/2 |
|
60,000 | 3/8 | 3/8 | 3/8 | 1/2 | 1/2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Suction Line |
|
|
| |
|
|
|
|
|
|
|
BTUH | Line Set Length and Size |
| ||||
|
|
|
|
|
| |
12 ft. | 25 ft. | 50 ft. | 75 ft. | 100 ft. |
| |
|
| |||||
18,000 | 3/4 | 3/4 | 3/4 | 3/4 | 3/4 |
|
|
|
|
|
|
|
|
24,000 | 3/4 | 3/4 | 3/4 | 3/4 | 7/8 |
|
30,000 | 3/4 | 3/4 | 3/4 | 7/8 | 7/8 |
|
|
|
|
|
|
|
|
36,000 | 7/8 | 7/8 | 7/8 | 7/8 |
| |
42,000 | 7/8 | 7/8 | 7/8 |
| ||
|
|
|
|
|
|
|
48,000 | 7/8 | 7/8 | 7/8 |
| ||
60,000 |
| |||||
|
|
|
|
|
|
|
For installations exceeding 50', contact
Technical Services at (419)
Table 2
Installing Refrigerant Line
During the installation of an air conditioning system, it is important to properly isolate the refrigerant line to prevent unnecessary vibration. Line set contact with the structure (wall, ceiling, or floor) may cause objectionable noise when vibration is translated into sound. As a result, more
Page 4
energy or vibration can be expected. Close attention to line set isolation must be observed.
Following are some points to consider when placing and installing a
Placement
Be aware that some localities are adopting sound ordinances based on how noisy the unit is at the neighbor’s home, not at the original installation. Install the unit as far as possible from the property line. When possible, do not install the unit directly outside a bedroom window. Glass has a very high level of sound transmission. Figure 5 shows how to place the outdoor unit and line set to reduce line set vibration.
Outside Unit Placement
and Installation
Install unit away from windows
Two 90° elbows installed in lineset will reduce lineset vibration
Figure 5
Line Set Isolation
Illustrations on the following pages demonstrate proce- dures which ensure proper refrigerant line set isolation. Figure 6 shows how to install line sets on horizontal runs. Figure 7 shows how to make a transition from horizontal to vertical. Figure 8 on page 6 shows how to install line sets on vertical runs.
Brazing Connection Procedure
1.Cut ends of refrigerant lines square (free from nicks or dents). Debur the ends. The pipe must remain round; do not pinch end of line.
2.Before making line set connections, use dry nitrogen to purge the refrigerant piping. This will help to prevent oxidation and the introduction of moisture into the system.
#48283B006
