Connection Instructions - Refrigerant Piping - Carrier 18K Installationshandbuch

Connection Instructions –
Refrigerant Piping
CAUTION
● The branching pipe must be installed
horizontally. An angle of more than 10° may
cause malfunction.
● DO NOT install the connecting pipe until both
indoor and outdoor units have been installed.
● Insulate both the gas and liquid piping to
prevent water leakage.
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.
Oblique Rough Warped
90°
DO NOT DEFORM PIPE WHILE
CUTTING
Be extra careful not to damage, dent, or deform
the pipe while cutting. This will drastically reduce
the heating efficiency of the unit.
Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant
piping connection. They must be completely
removed.
1. Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.
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2. Using a reamer or deburring tool, remove all
burrs from the cut section of the pipe.
Point down
Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight
seal.
1. After removing burrs from cut pipe, seal the
ends with PVC tape to prevent foreign materials
from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends of pipe. Make
sure they are facing in the right direction,
because you can't put them on or change their
direction after flaring.
Flare nut
Copper pipe
4. Remove PVC tape from ends of pipe when
ready to perform flaring work.
5. Clamp flare form on the end of the pipe. The
end of the pipe must extend beyond the flare
form.
Flare form
6. Place flaring tool onto the form.
7. Turn the handle of the flaring tool clockwise
until the pipe is fully flared. Flare the pipe in
accordance with the dimensions.
Pipe
Reamer
Pipe