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10
Installation Manual
Refrigerant Piping Connection Instructions
CAUTION
U The branching pipe must be installed horizontally.
An angle of more than 10° may cause malfunction.
U DO NOT install the connecting pipe until bothUIF
indoor and outdoor units have been installed.
U Insulate both the gas and liquid piping to prevent
water leakage.
Step1: 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.
CAUTION
DO NOT deform EBNBHF PS EFOU UIF pipe EVSJOH
cutting PS the heating efficiency of the unit XJMM CF
ESBTUJDBMMZSFEVDFE.
1. Make sure that the pipe is cut at a perfect 90°
angle. Refer to Fig. 8.1 for examples of bad cuts
Oblique
Rough
WarpeE
90°
Fig. 8.1
Step2:Removeburrs
Burrs can affect the airtight seal of UIFrefrigerant
piping connectionBOE must be completely removed.
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 dow
n
Fig. 8.2
Step 3: Flare pipe ends
Proper flaring is essential GPS an airtight seal.
After removing burrs from UIFcut pipe, seal the
endswith PVC tape to prevent foreign materials
fromentering the pipe.
Sheath the pipe with insulating material.
Place flare nuts on both ends of UIFpipe. Make
surethey are facing in the right direction because
youcan’t put them or change their direction after
flaring. See Fig. 8.3
Flare nut
Copper pipe
Fig. 8.3
4 . When you’ re ready to perform flaring work,
remove the PVC tape from UIFends of UIFpipe.
5. Clamp the flare form on the end of the pipe. The
endof the pipe must extend beyond the flare form.
Flare form
Pipe
Fig. 8.4
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