6 18-BC53D2-6
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
5.3 Required Refrigerant Line Length
5.2 Factory Charge
Line Sizes Service Valve Connection Sizes
Model
Vapor
Line
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
4TTZ0024A
3/4 3/8 5/8 3/8
4TTZ0036B
3/4 3/8 3/4 3/8
4TTZ0048A/B
7/8 3/8 3/4 3/8
4TTZ0060A
7/8 3/8 3/4 3/8
4TWZ0024A
5/8 3/8 5/8 3/8
4TWZ0036B
3/4 3/8 3/4 3/8
4TWZ0048A/B
3/4 3/8 3/4 3/8
4TWZ0060A
3/4 3/8 3/4 3/8
Table 5.1
Line Length
5.4 Refrigerant Line Insulation
Important: The Vapor Line must always be
insulated. DO NOT allow the Liquid Line and
Vapor Line to come in direct (metal to metal)
contact.
Vapor Line
Liquid Line
Insulation
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 condens-
ing unit, fifteen (15) feet of tested connecting line, and the smallest indoor evaporative coil match. See unit
nameplate. If connecting line length exceeds fifteen (15) feet and/or a larger indoor evaporative coil is
installed, then final refrigerant charge adjustment is necessary. Use Charge Assist™ or the Manual Charg-
ing procedure found in the outdoor unit Service Facts. Charge level can always be verified with the Refrigerant
Charging Chart found in the Service Facts.
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