Sanyo CM2472 Technical & Service Manual page 77

3. Installation Process
Embedding the Tubing and Wiring
3-1.
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.
(#12: Less than 85 ft.)
# ... AWG (American Wire Gauge)
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 contact rainwater,
or be subject to dew condensation.
3-2. 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.
3-3. 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. 12" to
20" (30 to 50 cm) longer than the tubing 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)
Before
15
Deburring
After
Fig. 8