Panasonic S-160PE1R5B Technical Data & Service Manual page 93

3. Installing the Refrigerant Tubing
The size of the refrigerant tubing is as shown in the table below.
Table 1-11-2-1-1
TYPE
Gas
Ø19.05(Brazing connection)
tube
Ø9.52(Flare connection)
Liquid
Tightening torque(approximate):32~42N · m
tube
Thickness of connecting tube:0.8mm
NOTE
To fasten the flare nuts, apply specified torque. See "HOW TO PROCESS TUBING" on page 1-11-2-1-6 for detail.
Brazing for the gas tube of S-160PE1R5B.
1. Before cutting the gas tube, please loosen the flare nut of the liquid tube.
2. When removing the flare nut from the indoor, be sure to use 2 adjustable wrenches or spanners.
3. Cut off the gas tube by tube cutter. (cut position : between the two blue lines)
● When cutting the tube, take care about deformed and clear without burrs.
4. Brazing at the field for connecting the new tube.
● When brazing, remove the cover plate and insulation, so that a wet cloth can be placed on the tube to cool it.
● When brazing the gas tubing, cool the tubing with dampened shopcloths as you work, as shown in the figure
below, to protect the unit's thermistor from the heat generated by brazing.
● When brazing, be careful not to heat the electrical component box. Doing so may cause the unit to be damaged.
● When connecting, be sure to insert the new tube at least 25mm.
5. After brazing for connecting the new tube, installing the cover plate and insulation back to the place.
● When installing, make sure the tube has been cooled down.
Insulation material
Cover plate
• Pipe insulation must be made after leak detection for tubing connection area was performed.
• Be sure to insulate both the gas tubing and liquid tubing.
In addition, wrap the supplied insulation material around the tubing joints, and fasten in place with vinyl tape or other means.
Failure to insulate the tubing may result in water leakage from condensation.
• Plug all gaps at tube through-holes in the unit with insulation or a similar substance to prevent air leakage.
160
Wet cloth
gas tube
liquid tube
(Ø19.05)
(Ø9.52)
1-11-2-1-4
cut position
(between the two blue lines)
25mm
1