Filter
Top Products
34 SS-SVX09A-EN
Installation
Refrigerant Piping
Refrigerant piping must be properly sized and applied. These two factors have a very significant
effect on both system performance and reliability.
NOTICE
Use Type “L” refrigerant grade copper tubing only.
Refrigerant Piping should be sized and laid out according to the job plans and specifications. This
should be done when the system components are selected.
Suction Line Piping
Proper suction line sizing is required to guarantee that oil is returned to the compressor throughout
the operating system. Furthermore, the line must be sized so that the pressure drop does not
excessively affect capacity or efficiency. To accomplish both, it may be necessary to have two sizes,
one for horizontal run and vertical drops, and another for the vertical lifts. The suction line size pre-
selected in the Table below are independent of the line length for a properly charged RAUC unit
operating in a normal air conditioning application.
For more information, refer to the latest edition of Application Guide SS-APG001-EN.
1. Do not use suction line traps.
2. Do not use double risers.
3. Avoid putting liquid lines underground.
4. Route suction lines as short and direct as possible.
5. Slope suction lines toward the evaporator ¼-inch to 1-inch for every 10 feet.
6. Insulate the suction lines.
7. The suction line filter should be as close to the compressor as possible.
Note: If Suction Riser Exceeds 50 Feet, Trane Must Review The Application.
Suction Line Interconnecting Tubing
Capacity OD Horizontal (Per Circuit)
OD Vertical
(Per Circuit)
20 Ton 2-1/8" 1- 5/8"
25 Ton 2-1/8" 1-5/8"
30 Ton 2-1/8" 2-1/8"
40 Ton 2-1/8" 1-5/8"
50 Ton 2-1/8" 2-1/8"
60 Ton 2-1/8" 2-1/8"
Note: If risers exceed 50 feet, the application must be reviewed by Trane.