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24 31-5000564 Rev. 3
ENGLISH
D. Install Copper Lineset
• Line set sizes are determined by the indoor unit. See indoor spec for information. The outdoor unit ships with port
adapters to reduce or enlarge the flare port sizes when needed. If connecting to 24K models with 3/8” & 5/8” ports,
adapters must be ordered separately.
• Cut the line set to length.
• Place nut over the pipe and then flare with the R-410A flaring tool.
NOTE: Follow standard practices for creating pipe flares. When cutting and reaming the tubing, use caution to prevent
dirt or debris from entering the tubing. Remember to place nut over the tubing before flaring.
• To join the line set, directly align the tubing flare to the fitting on the other pipe. Slide the nut onto the fitting and hand
tighten.
• Torque the fittings according to the specifications shown in the torque chart below.
Forced fastening without careful centering will
damage the threads and cause a refrigerant leak.
Pipe Diameter (ø) Fastening torque
1/4” 18N.m/13.3Ft.lbs
3/8” 42N.m/30.1Ft.lbs
1/2” 55N.m/40.6Ft.lbs
5/8” 60 N.m/44.3Ft.lbs
• Two wrenches are required to join the flare connection; one standard wrench and one torque wrench
adjusted to the proper settings.
• Repeat the process for attaching the other end of the line set.
CAUTION
Half union Flare nut
Torque wrench
Spanner
INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit (Cont.)
Model Number Factory
Charge Total Pipe
Length of
factory charge
Additional
charge rule Branch
Maximum
pipe length
System
Maximum
pipe length Minimum pipe length
Unit oz ft oz/ft ft ft ft
2U18MS2HDA 60 50
0.2
65 98
10’ per indoor
3U24MS2HDA 67 100 82 197
4U36MS2HDA 90 131 82 230
2U20EH2HDA 69 66 82 165
3U24EH2HDA 82 100 82 197
4U36EH2HDA 102 131 82 230
5U42MS2HDA 113 164 82 262
Refrigerant Charge and Pipe Length Information
Indoor Unit
Outdoor Unit
)
itioned
Indoor Unit
If the outdoor unit is
than one or more indoor units.
(If lower than one or more indoor units.)
Outdoor Unit
If all indoor unit are
the outdoor units.
eel
di
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