10
3. Installation Process
3-1.
Embedding the Tubing and Wiring
G
Do not connect tubes to locations that are embedded.
G
Be sure to bind refrigerant tubing and inter-unit cables together with vinyl tape.
G
The power cable must be obtained on-site. (3.5 mm
2
: Less than 26 m)
G
Be sure to apply the provided labels to both ends of the inter-unit cables to prevent miswiring.
G
Securely seal the end of embedded tubing with vinyl tape in order to prevent dirt or moisture entry.
G
In order to prevent insulation breakdown and ground faults, do not allow the wire ends to come in contact with
rainwater, or be subject to dew condensation.
3-2.
Drain Cap and Drain Elbow
First refer to Section 2. Installation Site Selection.
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)
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)
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.)
A good flare should have the following characteristics:
G
inside surface is glossy and smooth.
G
edge is smooth.
G
tapered sides are of uniform length.
NOT
E
NOT
E
NOT
E
Reamer
Copper
tubing
Fig. 9
Flare tool
Flare nut
Copper
tubing
Fig. 11
0 – 0.5 mm
If the special R410A
flare tool is used:
1.2 mm
If the previous flare tool
(clutch-type) is used:
Adjust so that the amount of tube
protrusion is as shown in the figure.
Fig. 10
English
CAUTION
When installing in a cold area
where drainage water may
freeze, do not attach the pro-
vided drain cap or drain elbow
to the bottom plate of the unit.
Deburring
Before
After
Fig. 8
Accessory
drain cap
Accessory
drain cap
Accessory
drain elbow
Outdoor unit
Fig. 7
08-342 CMRV3656EH_OU EN 6/9/09 2:27 PM Page 10
