Lennox SL25XPV Series Installation Instructions Manual page 6

SL25XPV*
-024
-036
-048
-060
* Applicable to all minor revision numbers unless otherwise specified.
** Some applications may require a field-provided 1-1/8" to 7/8" adapter.
TABLE 2. SL25XPV Line Set Guidelines – Between 51 - 150 Feet Linear Length
Maximum Total
Model
Equivalent Length (ft)
180
180
180
180
Unit Line Size
5/16"
3/8"
3/8"
1/2"
3/8"
1/2"
3/8"
1/2"
Shaded rows indicate rated liquid line size
A. Find your unit on the left side of the table.
B. Start with the rated liquid line size (shaded row) on the outdoor unit
C. Select the actual Total Linear Length of your system shown at the top of the table.
D. The elevation listed in the table is the maximum allowed for the liquid line listed.
E. Select or consider the larger liquid line size shown in the table if the elevation does not meet your requirements.
NOTE - For new or replacement line set installation, refer to Service and Application Note - Corp. 9112-L4 (C-91-4).
CAUTION
Brazing alloys and flux contain materials which are
hazardous to your health.
Avoid breathing vapors or fumes from brazing operations.
Perform operations only in well-ventilated areas.
Wear gloves and protective goggles or face shield to
protect against burns.
Wash hands with soap and water after handling brazing
alloys and flux.
TABLE 1. Standard Refrigerant Line Set – Up to 50 Linear Feet
Valve Size Connections
Liquid Line Suction Line
3/8" (10 mm)
7/8" (22 mm)
3/8" (10 mm) 1-1/8" (29 mm) **
Maximum Linear
(actual) Length (ft)
150
150
150
150
TABLE 3. Liquid Line Diameter Selection Table
25
25
25
25
25
25
25
25
25
Inches (mm)
L15 Line Set Model
L15-65-30
L15-65-40
L15-65-50
Field-fabricated
Maximum Vapor
Linear Liquid
Riser (ft)
60
60
60
60
Total Linear Length (feet)
50 75
50 55
50 60
50 60
50 60
50 50
50 60
50 36
50 60
Page 6
Recommended Line Sets
Line Set Length
30 feet (9.1 m)
40 feet (12.2 m)
50 feet (15.2 m)
Preferred
Maximum
Vapor Line
Sizes for
Lift (ft)
Horizontal
Runs
60 7/8"
60 7/8"
60 7/8"
60 7/8"
100 125
48 40
60 60
56 51
60 60
41 31
60 60
22 8
60 60
WARNING
Danger of fire. Bleeding the refrigerant
charge from only the high side may result
in pressurization of the low side shell and
suction tubing. Application of a brazing torch
to a pressurized system may result in ignition
of the refrigerant and oil mixture. Check the
high and low pressures before applying heat.
Catalog Number
89J60
89J61
89J62
Required Vapor
Riser Size
5/8"
3/4"
7/8"
7/8"
150
33
60
45
60
22
60
NR
59