Panasonic CU-5E34NBE Manual Del Usuario página 53

3. Installation Process
Embedding the Tubing and Wiring
3-1.
Do not connect tubes to locations that are embedded.
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Be sure to bind refrigerant tubing and inter-unit cables together with vinyl tape.
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The power cable must be obtained on-site. (3.5 mm
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Be sure to apply the provided labels to both ends of the inter-unit cables to prevent miswiring.
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Securely seal the end of embedded tubing with vinyl tape in order to prevent dirt or moisture entry.
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In order to prevent insulation breakdown and ground faults, do not allow the wire ends to come in contact with
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rainwater, or be subject to dew condensation.
Drain Cap and Drain Elbow
3-2.
First refer to Section 2. Installation Site Selection.
NOTE
The drain hole at the bottom of the outdoor unit was not plugged at the
time of factory shipment. If necessary, plug the drain hole with the acces-
sory drain cap or mount the accessory drain elbow before installing the
outdoor unit. (Fig. 7)
When installing in a cold area
CAUTION
where drainage water may
freeze, do not attach the pro-
vided drain cap or drain elbow
to the bottom plate of the unit.
3-3. Use of the Flaring Method
Many of the conventional split system air conditioners employ the
flaring method to connect refrigerant tubes which run between
indoor and outdoor units. In this method, the copper tubes are flared
at each end and connected with flare nuts.
3-4. Flaring Procedure with a Flare Tool
(1) Cut the copper tube to the required length with a tube cutter. It
is recommended to cut approx. 30 – 50 cm longer than the tub-
ing length you estimate.
(2) Remove burrs at the end of the copper tube with a tube reamer or file. This process is
important and should be done carefully to make a good flare. (Fig. 8)
NOTE
When reaming, hold the tube end downward and be sure that no copper scraps fall into
the tube. (Fig. 9)
(3) Remove the flare nut from the unit and be sure to mount it on the copper tube.
(4) Make a flare at the end of copper tube with a flare tool.* (Figs. 10 and 11)
(*Use "RIDGID" or equivalent.)
NOTE
A good flare should have the following characteristics:
inside surface is glossy and smooth.
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edge is smooth.
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tapered sides are of uniform length.
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If the special R410A
flare tool is used:
0 – 0.5 mm
Fig. 10
If the previous flare tool
(clutch-type) is used:
1.2 mm
Adjust so that the amount of tube
protrusion is as shown in the figure.
: Less than 26 m)
2
Before
11
Outdoor unit
Accessory Accessory
Accessory
drain cap drain cap
drain elbow
Fig. 7
Deburring
After
Fig. 8
Fig. 9
Flare nut
Flare tool
Fig. 11
Copper
tubing
Reamer
Copper
tubing