Connecting Tubing Between Indoor And Outdoor Units - Sanyo SPW-C706VH8 Instrucciones De Instalación

N OT E
A good flare should have the following characteristics:
● inside surface is glossy and smooth
● edge is smooth
● tapered sides are of uniform length
Flare size: A (mm)
Caution Before Connecting Tubes Tightly
(1) Apply a sealing cap or water-proof tape to prevent dust or
water from entering the tubes before they are used.
(2) Be sure to apply refrigerant lubricant to the matching
surfaces of the flare and union before connecting them
together. This is effective for reducing gas leaks. (Fig. 7-4)
Apply refrigerant lubricant.
(3) For proper connection, align the union tube and flare tube
straight with each other, then screw on the flare nut lightly
at first to obtain a smooth match. (Fig. 7-5)
● Adjust the shape of the liquid tube using a tube bender at the
installation site and connect it to the liquid tubing side valve
using a flare.
Cautions During Brazing
● Replace air inside the tube with nitrogen gas to prevent
copper oxide film from forming during the brazing
process. (Oxygen, carbon dioxide and Freon are not
acceptable.)
● Do not allow the tubing to get too hot during brazing.
The nitrogen gas inside the tubing may overheat,
causing refrigerant system valves to become damaged.
Therefore allow the tubing to cool when brazing.
● Use a reducing valve for the nitrogen cylinder.
● Do not use agents intended to prevent the formation
of oxide film. These agents adversely affect the
refrigerant and refrigerant oil, and may cause damage or
malfunctions.
Copper tubing
A
(Outer dia.)
ø6.35 9.1
ø9.52 13.2
ø12.7 16.6
ø15.88 19.7
ø19.05 24.0
Flare nut
Union
7-2. Connecting Tubing Between Indoor and
Outdoor Units
(1) Preparing the Tubing.
● The tubing of the gas main has a diameter of ø25.4, but
the connection to the service valve of the outdoor unit
has a diameter of ø19.05, so a flare has to be used.
Consequently, be sure to use the enclosed joint tube and
reducing joint tube in making connections (braze).
0
–0.4
● Align the joint tube in the direction the tubing comes out and
refer to the following references "Examples of Making Tube
Connections" 1 to 4 in cutting it to the required length and
then braze it.
● To protect the wiring and parts inside the unit, perform the
brazing outside the unit. Also, take note that each of the joint
tubes in 1 to 3 have to be installed in a specific direction, so
make sure they are as depicted in the figure when you braze
them.
Examples of Making Tube Connections
1 Out Front
Flare Process
Fig. 7-4
2 Out Right
Fig. 7-5
The connection
faces towards you
3 Out Rear
47
Flare Process
Flare Process