Installation Guide

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.
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Outdoor Unit Installation Instructions
Outdoor Unit
Installation
Pioneer WYT Series Mini Split
MODEL/Capacity (Btu/h)
9K 12K 18K
Liquid Pipe Diameter
24K
Gas Pipe Diameter
Length of Pipe with Standard Charge
Maximum Distance Between Indoor and Outdoor Unit
Max. Difference in Level Between Indoor and Outdoor Unit
Type of Refrigerant
1/4”
( 6.35)
1/4”
( 6.35)
1/4”
( 6.35)
3/8”
( 9.52)
3/8”
( 9.52)
3/8”
( 9.52)
1/4”
( 6.35)
1/2”
( 12.7)
7.5m / 25ft
15m / 49ft
20g/m
5m / 16ft
Additional Refrigerant Charge (For each add’l foot after 16 ft.)
R410A R410A R410A R410A
36K
5/8”
( 15.88)
R410A
1/4”
( 6.35)
0.22oz/ft
7.5m / 25ft
15m / 49ft
20g/m
5m / 16ft
0.22oz/ft
7.5m / 25ft
15m / 49ft
20g/m
5m / 16ft
0.22oz/ft
7.5m / 25ft
15m / 49ft
20g/m
5m / 16ft
0.22oz/ft
7.5m / 25ft
15m / 49ft
30g/m
5m / 16ft
0.32oz/ft
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:
Oblique Rough Warped
90°
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:
1. Hold the pipe at a downward angle to
prevent burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove
all burrs from the cut section of the pipe.
Pipe
Reamer
Point down
Ensures no shavings
can fall inside of tubes