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Notes for piping
Pipes for refrigerant and drainage pipeshould be insulated to avoid
frostingand dripping.
1. Both of the indoor and outdoor unitsadopt flare-end connection.
Refrigerantpipe as shown below is used to connect indoor and out-
door units.(As shown in Fig.8)
Note:Don't bend the bendable pipe back and forth more than 3 times.
Insulate allexposed parts of the flare-end connectionjoint and refrige-
rant pipe. (As shown in Fig.9)
2.Check valve of the outdoor unit should be closed(in factory). Every
time of connection,screw cap at check valve should be unscrewed
and then connect it with flare-end pipe immediately (within 5 min).
Otherwise,dust, moisture and other impuritiesmay go into the pipe
and cause malfunction.
Notes for bendable pipe:
1.The part with bendable pipe should be used inindoor side.
2.The bending angle should not be more than 90.
3. It's better for the bend to be in the middle of the pipeand the radius
of the bend is the bigger the better.
4. Don't bend the bendable pipe more than three times.
When bending the pipe
1. Cut some part of the insulation pipe at the place of the bend (and
wrap with polythene tape after bending).
2. Make radius of the bend as big as possible so that thepipe will not
get flat or broken.
3. Tighten the pipe bending by the rubber bender.
When using copper pipe bought locally
Check valve of the outdoor unit should be closed completely(in the
factory). After connection of indoor and outdoor unitsvia connection
pipe, discharge the air from service vent oflow-pressure check valve
of the outdoor unit. After that,screwdown the nuts to service vent.
Install the big handle.
After step 1 or 2 aboveCheck valve of the outdoor unit should be
fully opened toensure smooth flow of connection pipe between in-
door and outdoor units.
Note: Before fastening nut of the flare-end pipe, please apply some
refrigerant oil to the end of the pipe and the joint.
Fig.8
Indoor unit
Bendable pipe
Outdoor
unit
Polythene tape
Insulation cover
Bend the pipe with thumbs
Loosen the roll of pipe
Straighten end of pipe
Fig.9
Fig.10
Fig.11
Flare-end
connection
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