Connection Of Refrigerant Piping - Pioneer Wyt-20 Series Installation & User Manual

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 16 ft. Factory precharge is sufficient
for supporting up to 25 ft of connected lineset. Piping should not be shorter than 10 ft in length.
Refer to the table below for specifications on the maximum length and drop height of piping.
If the factory precharge is modified, make a note of the charge modification amount on Page 61.
Connection Instructions –
Refrigerant Piping
Step 1: Cut pipes (If cutting lineset shorter)*
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 rolling blade type 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
*Most standard linesets are pre-flared. In case modifications are needed.
Page 44
 
Rough Warped
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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
8
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Pipe
Reamer