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INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit (Cont.)
Model Number
Factory
Charge
Unit
oz
2U18MS2HDA1
60
3U24MS2HDA1
67
4U36MS2HDA1
90
2U20EH2VHA
99
3U24EH2VHA
99
4U36EH2VHA1
113
E. Install Copper Lineset
• For 2U20EH2VHA, 2U18MS2HDA1, 3U24EH2VHA, 3U24MS2HDA1, 4U36MS2HDA1, and 4U36EH2VHA1 see above
table.
• 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.
• 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
• Max. Elevation: A Max
= 33ft / 10m (09k / 12k)
= 50ft / 15m (18k / 24k)
• Max. Length: B Max
= 50ft / 15m (09k / 12k)
= 83ft / 25m (18k / 24k)
20
Refrigerant Charge and Pipe Length Information
Total Pipe
Additional
Length of
charge rule
factory charge
ft
oz/ft
50
0.2
100
0.2
131
0.2
100
0.2
100
0.2
131
0.2
Forced fastening without careful centering will
damage the threads and cause a refrigerant leak.
Pipe Diameter (ø)
Liquid side 6.35mm (1/4")
Liquid/Gas side 9.52mm
(3/8")
Gas side 12.7mm (1/2")
Gas side 15.88mm( 5/8")
CAUTION*
CAUTION*
Indoor unit
B
Indoor unit
B
A
A
Outdoor unit
Outdoor unit
●
Outdoor unit
Outdoor unit
●
Oil trap
Oil trap
B
B
Indoor unit
Indoor unit
●
A
A
Branch
System
Maximum
Maximum
pipe length
pipe length
ft
ft
65
98
82
197
82
230
82
164
82
197
82
230
Fastening torque
18N.m/13.3Ft.lbs
18N.m/13.3Ft.lbs
55N.m/40.6Ft.lbs
60 N.m/44.3Ft.lbs
Outdoor unit
Outdoor unit
B
B
Indoor unit
Indoor unit
A
A
●
Max. Elevation: A Max
Max. Elevation: A Max
= 33ft / 10m (09k / 12k)
= 33ft / 10m (09k / 12k)
= 50ft / 15m (18k / 24k)
= 50ft / 15m (18k / 24k)
●
In case the height of A is more than
In case the height of A is more than
15ft / 5m, an oil trap should be
15ft / 5m, an oil trap should be
installed every 16-23ft /5-7m
installed every 16-23ft /5-7m
●
Max. Length: B Max
Max. Length: B Max
Minimum pipe length
ft
6' per indoor and 20' per system
6' per indoor and 20' per system
6' per indoor and 20' per system
6' per indoor and 20' per system
6' per indoor and 20' per system
6' per indoor and 25' per system
Half union
Flare nut
Spanner
Torque wrench
31-5000564 Rev. 1
Forced fastenin
damage the thre
Pipe Diam
Liquid side6.
Liquid/Gas side9
Gas side 12
Gas side 15.
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