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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.
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
Model
4TTR6024N
4TTR6036N
4TTR6048N
4TTR6060N
4TTR6018J
4TTR6024J
4TTR6030J
4TTR6035J
4TTR6036J
4TTR6041J
4TTR6042J
4TTR6048J
4TTR6049J
4TTR6060J
4TTR6060K
4TTR6061C
5.2 Factory Charge
The outdoor condensing units are factory charged with the system charge required for the outdoor condensing
unit, ten (10) feet of tested connecting line, and the smallest rated indoor evaporative coil match. Always verify
proper system charge via subcooling (TXV/EEV) or superheat (fixed orifice) per the unit nameplate.
5.3 Required Refrigerant Line Length
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.
18-AC98D1-7D-EN
Line Sizes
Service Valve Connection Sizes
Vapor
Liquid
Vapor Line
Line
Line
Connection
3/4
3/8
3/4
3/4
3/8
3/4
7/8
3/8
7/8
1-1/8
3/8
7/8
3/4
3/8
3/4
3/4
3/8
3/4
3/4
3/8
3/4
3/4
3/8
3/4
7/8
3/8
3/4
7/8
3/8
3/4
7/8
3/8
7/8
7/8
3/8
7/8
7/8
3/8
7/8
1-1/8
3/8
7/8
1-1/8
3/8
7/8
1-1/8
3/8
7/8
Table 5.1
Max Line & Lift Lengths
TOTAL Max
Liquid Line
Connection
Line Length (ft.)
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
Max Lift (ft.)
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
150
50
Line Length
5
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