18-AC79D1-6-EN 5
Section 4. Setting the Unit
4.1 Pad Installation
When installing the unit on a support pad, such
as a concrete slab, consider the following:
• The pad should be at least 1” larger than the
unit on all sides.
• The pad must be separate from any structure.
• The pad must be level.
• The pad should be high enough above grade
to allow for drainage.
• The pad location must comply with National,
State, and Local codes.
Line Sizes Service Valve Connection Sizes
Model
Vapor
Line
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
4TTR3018H
3/4 3/8 3/4 3/8
4TTR3024H
3/4 3/8 3/4 3/8
4TTR3030G
3/4 3/8 3/4 3/8
4TTR3036G
3/4 3/8 3/4 3/8
4TTR3042D
3/4 3/8 3/4 3/8
4TTR3048D
7/8 3/8 7/8 3/8
4TTR3060D
7/8 3/8 7/8 3/8
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
Table 5.1
5.3 Required Refrigerant Line Length
5.2 Factory Charge
Determine required line length and lift. You will
need this later in STEP 2 of Section 14.
Total Line Length = __________ Ft.
Total Vertical Change (lift) = __________ Ft.
Trane outdoor condensing units are factory charged with the system charge required for the outdoor condensing
unit, fifteen (15) feet of tested connecting line, and the smallest indoor evaporative coil match. If connecting line
length exceeds fifteen (15) feet and/or a larger indoor evaporative coil is installed, then final refrigerant
charge adjustment is necessary.
Line Length
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