Page 5
XP25 SERIES
ADDING REFRIGERANT FOR LONG LINE SETS
WEIGH IN
Liquid Line
Set Diameter
HFC-410A
(ounces per foot)
5/16”
3/8”
1/2”
0.40
0.60
1.00
NOTE — The reference nameplate is for illustration purposes only.
Go to actual nameplate on outdoor unit for charge information.
CHARGING METHOD FOR LONG LINE SETS
NOTE — Insulate liquid line when it is routed through areas where
the surrounding ambient temperature could become higher than the
temperature of the liquid line, or when pressure drop is equal to or
greater than 20 psig.
Amount specified
on nameplate
Adjust amount for variation in
line set length and liquid line
diameter using table below.
Total charge
+
=
64ºF (17.7ºC) and below
Example: Units are factorycharged for 15 feet (4.6 meters) of 3/8" line set.
Factory charge for 3/8" is 0.60 oz/ft x 15 = 9.0 ounces.
Charging Formula for Liquid Line Charge Adjustments
[(Line set oz./ft. x total length) (factory charge for line set)] = charge adjustment
Figure 2. Using HFC-410A Weigh In Method
Table 1. Standard Refrigerant Line Set — Up to 50 Linear Feet
Inches (mm)
Unit Size
Valve Size Connections Recommended Line Sets
Liquid Line Suction Line L15 Line Set Model Line Set Length Catalog Number
-024
-036
-048
3/8” (10 mm) 7/8” (22 mm)
L15-65-30 30 feet (9.1 m) 89J60
L15-65-40 40 feet (12.2 m) 89J61
L15-65-50 50 feet (15.2 m) 89J62
-060 3/8” (10 mm) 1-1/8” (29 mm) ** Field-fabricated
* Applicable to all minor revision numbers unless otherwise specified.
** Some applications may required a field-provided 1-1/8” to 7/8” adapter.
Table 2. Line Set Guidelines Between — 51 150 Linear Length
Unit Size
Maximum Total
Equivalent Length (ft)
Maximum Linear
(actual) Length (ft)
Maximum
Vapor Riser
(ft)
Maximum
Linear Liquid
Lift (ft)
Preferred Vapor
Line Sizes for
Horizontal Runs
Required Vapor
Riser Size
024 180 150 60 60 7/8” 5/8”
036 180 150 60 60 7/8” 3/4”
048 180 150 60 60 7/8” 7/8”
060 180 150 60 60 7/8” 7/8”
Table 3. Liquid Line Diameter Selection Table
Unit Size Line Size
Total Linear Length (feet)
25 50 75 100 125 150
024
5/16”
25
50 55 48 40 33
Max. Elevation (ft)
3/8”
25
50 60 60 60 60
036
3/8”
25
50 60 56 51 45
1/2”
25
50 60 60 60 60
048
3/8”
25
50 50 41 31 22
1/2”
25
50 60 60 60 60
060
3/8”
25
50 36 22 8 NR
1/2”
25
50 60 60 60 59
Note Shaded rows indicate rated liquid line size
1. Find your unit on the left side of the table.
2. Start with the rated liquid line size (shaded row) on the outdoor unit
3. Select the actual total linear length of your system shown at the top of the table.
4. The elevation listed in the table is the maximum allowed for the liquid line listed.
5. Select or consider the larger liquid line size shown in the table if the elevation does not meet your requirements.
33 of 44 B17-0056
01/19/2017
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