Sanyo SPW-C0705DZH8 - Precautions for Brazing; Refrigerant Tube Port; Tightening Torque for each Cap

Refrigerant tubing
Connection
method
Use supplied
connector tube?
Suction tube
Brazed connection
Yes (ø19.05 ø25.4)
Discharge tube Brazed connection
Yes (ø15.88 ø19.05)
Liquid tube Brazed connection
Yes (ø9.52 ø12.7)
Balance tube Flared connection No
Refrigerant tubing
Connection
method
Use supplied
connector tube?
Suction tube
Brazed connection No
Discharge tube Brazed connection
Yes (ø19.05 ø22.22)
Liquid tube Brazed connection No
Balance tube
Flared connection
No
Refrigerant tubing
Connection
method
Use supplied
connector tube?
Suction tube Brazed connection
Yes (ø25.4 ø28.58)
Discharge tube Brazed connection
Yes (ø19.05 ø22.22)
Liquid tube Brazed connection No
Balance tube Flared connection No
115 type (12 horsepower)
130 type (14 horsepower)
140 type (16 horsepower)
Use caulking, putty, or a similar material to fill any gaps
at the refrigerant tube port ( ) in order to prevent
rainwater, dust or foreign substances from entering the
unit.
* Perform this work even if the tubing is routed out in a
downward direction.
Tighten each cap as specified below.
Service port cap
(width 15 mm)
7 – 12 N · m (70 – 120 kgf · cm)
Valve cap
(width 22 mm)
20 – 25 N · m (200 – 250 kgf · cm)
Flare nut
(valve dia. ø9.52)
34 – 42 N · m (340 – 420 kgf · cm)
Precautions for brazing
Be sure to replace the air inside the tube with nitrogen
to prevent oxide film from forming during the brazing
process.
Be sure to use a damp cloth or other means to cool the
valve unit during brazing.
1.
2. Use a pressure-reducing valve on the nitrogen tank.
3. Do not use agents intended to prevent the formation of
oxide film. They will adversely affect the refrigeration
oil, and may cause equipment failure.
4. The balance tube is not used if only 1 outdoor unit is
installed.
Use the unit in the same conditions as when it was
shipped from the factory.
Base plate
Tubing
cover
Tubing routed out forward Tubing routed out downward
Valve cap
Flare nut
Service port cap
Brazing locations
Field-supply tube
Remote valve
Taping
Pressure-
reducing
valve
(regulator)
Work method
Nitrogen
Refrigerant tube port:
Tightening torque for each cap
CAUTION
Be sure to use nitrogen. (Oxygen, CO2, and CFC must
not be used.)
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Design of 3-WAY ECO-i SYSTEM
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4. Installation Instructions
TD831143-00_W-3WAY.indb 41 2008/12/05 9:40:26