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Outdoor Unit Installation Instructions
Connection of the Refrigerant Piping
The length of refrigerant piping will affect the performance and energy efficiency of the unit.
Nominal efficiency is tested on units with a pipe length of 5 meters (16 ft).
Refer to the table below for specifications on the maximum length and drop height of piping.
Pioneer WYF Series Mini Split
25 SEER series MODEL/Capacity (Btu/h)
Liquid Pipe Diameter
Gas Pipe Diameter
Length of Pipe Supported by Standard Factory Pre-Charge
Maximum Distance Between Indoor and Outdoor Unit
Additional Refrigerant Charge (For each add'l foot after 16 ft.)
Max. Difference in Height Between Indoor and Outdoor Unit
Type of Refrigerant
Connection Instructions –
Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra care
to cut and flare them properly. This will ensure
efficient operation and minimize the need for
future maintenance.
1. Measure the distance between the indoor and
outdoor units.
2. Using a pipe cutter, cut the pipe a little
longer than the measured distance.
3. Make sure that the pipe is cut at a perfect 90°
angle. Refer below for bad cut examples:
90°
Oblique
Page 34
Rough
Warped
9K
12K
1/4"
1/4"
( 6.35)
( 6.35)
3/8"
3/8"
( 9.52)
( 9.52)
7.5m / 25ft
7.5m / 25ft
20m / 65ft
20m / 65ft
20g/m
20g/m
0.22oz/ft
0.22oz/ft
10m / 33ft
10m / 33ft
(5m / 16ft when ODU above IDU)
(5m / 16ft when ODU above IDU)
R410A
R410A
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, kink, or
deform the pipe while cutting. This will
drastically reduce the efficiency and capacity
of the unit and may cause internal damage.
Step 2: Remove any burrs carefully.
Burrs can affect the air-tight seal of refrigerant
piping connection. They must be completely
removed. Follow these steps for proper deburring:
Hold the pipe at a downward angle to
1.
prevent burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove
all burrs from the cut section of the pipe.
Point down
Ensures no shavings
can fall inside of tubes
7
18K
24K
3/8"
1/4"
( 9.52)
( 6.35)
1/2"
5/8"
( 12.7)
( 15.88)
7.5m / 25ft
7.5m / 25ft
20m / 65ft
20m / 65ft
20g/m
30g/m
0.22oz/ft
0.32oz/ft
10m / 33ft
10m / 33ft
(5m / 16ft when ODU above IDU)
(5m / 16ft when ODU above IDU)
R410A
R410A
Pipe
Reamer
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