Lennox International Inc. 2SCU13 User Manual
Page 4
Page 4
# 48283B006
Table 2
Refrigerant Line Set Diameters (in.)
For installations exceeding 50', contact
Technical Services at (419) 483-4840.
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1
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2
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5
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5
7
.
t
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0
0
1
0
0
0
,
8
1
4
/
3
4
/
3
4
/
3
4
/
3
4
/
3
0
0
0
,
4
2
4
/
3
4
/
3
4
/
3
4
/
3
8
/
7
0
0
0
,
0
3
4
/
3
4
/
3
4
/
3
8
/
7
8
/
7
0
0
0
,
6
3
8
/
7
8
/
7
8
/
7
8
/
7
8
/
1
-
1
0
0
0
,
2
4
8
/
7
8
/
7
8
/
7
8
/
1
-
1
8
/
1
-
1
0
0
0
,
8
4
8
/
7
8
/
7
8
/
7
8
/
1
-
1
8
/
1
-
1
0
0
0
,
0
6
8
/
1
-
1
8
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1
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1
8
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1
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1
8
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1
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1
8
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1
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1
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2
1
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t
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5
2
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t
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0
5
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t
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5
7
.
t
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0
0
1
0
0
0
,
8
1
8
/
3
8
/
3
8
/
3
8
/
3
8
/
3
0
0
0
,
4
2
8
/
3
8
/
3
8
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3
8
/
3
8
/
3
0
0
0
,
0
3
8
/
3
8
/
3
8
/
3
8
/
3
2
/
1
0
0
0
,
6
3
8
/
3
8
/
3
8
/
3
8
/
3
2
/
1
0
0
0
,
2
4
8
/
3
8
/
3
8
/
3
2
/
1
2
/
1
0
0
0
,
8
4
8
/
3
8
/
3
8
/
3
2
/
1
2
/
1
0
0
0
,
0
6
8
/
3
8
/
3
8
/
3
2
/
1
2
/
1
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
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) 483-4840.
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'.
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 high-efficiency outdoor unit:
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
Figure 5
Install unit away
from windows
Two 90° elbows installed in lineset
will reduce lineset vibration
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.