Panasonic U-8ME1E8 Mode D'emploi page 14

SUPPLEMENT
3-3. Routing the Tubing
● The tubing can be routed out either from the front or from the bottom. (Fig. 3-5-a)
● The connecting valve is contained inside the unit. Therefore, remove the front panel. (Fig. 3-5-b)
(1) If the tubing is routed out from the front, punch out the slit part (
● Be careful not to damage the tubing cover.
(2) If the tubing is routed out from the bottom, use cutting pliers or a similar tool to cut out the tubing outlet slit (part indicated by
from the tubing cover. (Figs. 3-5-c and 3-6-b)
● Be careful not to damage the tubing cover.
Model : 8 hp, 10 hp, 12 hp Model : 0706, 0906, 1156 Model : 14 hp, 16 hp
Front
Front
Bottom
Bottom
Fig. 3-5-a
Model : 8 hp, 10 hp, 12 hp Model : 14 hp, 16 hp
Remove eight panel Remove eight panel
screws from front panel. screws from front panel.
Fig. 3-5-b
If the tubing is routed out from the front,
punch out in the direction of the arrow.
Remove three screws
Tubing cover
If the tubing is routed out from the bottom,
use cutting pliers or a similar tool to cut out
the tubing outlet slit from the tubing cover.
Fig. 3-5-c
). (Fig. 3-6-a)
Model : 18 hp, 20 hp
Front
Bottom
Model : 18 hp, 20 hp
Remove eight panel
screws from front panel.
Tubing cover
Fig. 3-6-a
Tubing cover
Fig. 3-6-b
Fig. 3-6-b
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3-4. Prepare the Tubing
● Material: Use C1220 phosphorous deoxidized copper
as described in JIS H3300, "Copper and Copper Alloy
Seamless Pipes and Tubes." (For tubes that are ø22.22 or
larger, use 1/2H material or H material. For all others use O
) material.)
● Tubing size
Use the tubing size indicated in the table below.
● When cutting the tubing, use a tube cutter, and be sure to
remove any burrs.
(The same applies to distribution tubing (optional).)
● When bending the tubes, bend each tube using a radius
that is at least 4 times the outer diameter of the tube. When
bending, use sufficient care to avoid crushing or damaging
the tube.
● For flaring, use a flare tool, and be sure that flaring is
performed correctly.
CAUTION
Use sufficient caution during preparation of the tubing.
Seal the tube ends by means of caps or taping to prevent
dust, moisture, or other foreign substances from entering
the tubes.
Refrigerant tubing
Tubing size (mm)
Outer dia. Thickness Outer dia.
ø6.35 t0.8
ø9.52 t0.8
ø12.7 t0.8
ø15.88 t1.0
ø19.05 t1.2
3-5. Connect the Tubing
● When operating the refrigerant tube installation in the
field, do not apply the flame of welding to the surrounding
sheet-metal parts. If necessary, use a wet rag to prevent
overheating of the heat exchanger.
● If you have difficulty installing the refrigerant tube, you may
remove the fixing bracket.
Since this bracket is only used for transportation, it is not
necessary to reinstall in its original position. If not used for
transportation, dispose of the bracket in a proper way.
Removable
● Except for the 16hp model, do not use the supplied
connector tubing. (See figure below.)
Model : 8hp, 10hp, 12hp, 14hp, 18hp, 20hp (Except 16hp)
3 2 1
Refrigerant
tubing
1
Gas tubing
2 Liquid tubing Flare connection
3 Balance tube Flare connection
Model : 16hp
3 2 1
Refrigerant
tubing
1
Gas tubing
2 Liquid tubing Flare connection
3 Balance tube Flare connection
Refrigerant tube port
● Use caulking, putty, or a similar material to fill any gaps at
the refrigerant tube port (
dust or foreign substances from entering the unit.
* Perform this work even if the tubing is routed out in a
downward direction.
Thickness
ø22.22 t1.0
ø25.4 t1.0
ø28.58 t1.0
ø31.75 t1.1
Tubing routed out
ø38.1 over t1.35
through the front side
ø41.28 over t1.45
Tubing routed out
through the bottom
24
Connection Supplied
method parts used?
Brazing No
No
No
Connection Supplied
method parts used?
yes
Brazing
(ø25.4 ø28.58)
No
No
) in order to prevent rainwater,
Tubing
cover
Bottom
plate