9.3.8.
OXYGEN TUBE CONECTION
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Precautions during oxygen tube connection
1.Tube allowable length and height difference is the same as pipes.
2.Tube should be pulled without folding it along the path of refrigerant pipe,
providing sufficient allowance and cut to length.
3. When the tube is passed through the pipe hole, it should not form the inner
wall of the pipe bends.
The tube may be pressed to the corner of the hold and crushed.
4. Cutting of tube should be done with cutter or knife, cutting surface should
be straight and even.
Finishing should be done and leave no scratches behind.
5.Tube end's last 15 mm (the section to be inserted to the joint during connection)
should be free from any damages.
6.Take note that the inside of tube should be free from stones, dirt, dust, and
other impurities.
Do connection check after normal running of cooling has been confirmed during trial operation.
(You cannot do proper oxygen tube connection check before normal running has been confirmed during trial operation.)
Operate according to the sequence listed below , and check tube connection.
1. Open the cap (1) to check.(Refer to the figure on Page 29)
2. Put your ear close to the window to listen if there is oxygen flowing out (a
in the window with your finger, then release your finger. The sound of flow will be louder and easier to tear.
(If there is no air release, the cause may be tube collapse, or the insert at join section not proper. Check again and make
correction if found not properly done.)
shuuuu sound). If it's hard to hear , push the cap (2)
3.After checking, make sure that you push down the cap (1) and return to its original position.(If it is not returned to its position,
it may cause abnormal noise.)
Finishing should be carried out for pipe and drain hose.
Refer to Pipe insulation of outdoor unit.
Oxygen tube connection
Connection check
Finishing
Insert oxygen tube 7 into the joint section of indoor unit till it fully reaches its limit (about 15 mm). (Refer to Fig.A)
Insert into the joint of outdoor unit in the same manner. (Refer to Fig.B)
If the insert does not fully reach the limit, oxygen may leak out from the joint causing abnormal noise.
In both indoor and outdoor unit, the tube inserted will be locked inside the joint by the stopper , and the job is complete.
To make sure that it's done properly, pull out lightly to check if can be removed.
Oxygen tube
joint section
About 15 mm
Oxygen tube
Connection with
indoor joint
Indoor unit
oxygen
tube joint
section
Insert
Oxygen tube
Insert
about
15 mm
7
Outdoor unit
Connection with outdoor joint
When connecting pipe, apply your tool to the
joint section, and do not cause any damage.
Insert
Oxygen tube
Insert about
15 mm
7
Fig.A
Fig.B
While pressing the release bush of joint section in the arrow direction as shown on the right,
pull out the tube. (The same for indoor and outdoor unit)
When reusing tube that has been pulled out, cut the tube end by 15 mm before reuse.
(If the tube is damaged during pull out, it may cause oxygen leakage .)
Removing oxygen tube
Release bush
Push
Oxygen tube
Push
Pull
Joint section
CS-XA9DKD/ CU-XA9DKD/ CS-XA12DKD/ CU-XA12DKD
When connecting the oxygen tube 7 , wrap the part close to the outdoor unit with the
insulating aleeve 8 and the joint with the insulating material 9 to prevent the
moisture inside the tube from cindending.
Note :
