Installing The Refrigerant Tubing - Panasonic S-224ME2E5 Installation Instructions Manual

3-3. Installing the Refrigerant Tubing

The size of the refrigerant tubing is as shown in the table below.
Table 3-1
Type 224
ø19.05
Gas tube
(Brazing connection)
ø9.52 (Flare connection)
Tightening torque (approximate)
Liquid tube
Thickness of connecting tube
N OTE
To fasten the flare nuts, apply specified torque.
• When brazing, must be cool the thermistor and the pipe by wet
cloths after removing the insulation tube and the cover plate.
• When brazing the gas tubing, cool the tubing with dampened
shopcloths as you work, as shown in the figure at right, to protect
the unit's thermistor from the heat generated by brazing.
• 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.
• When connecting to the 3WAY VRF system's outdoor unit, it is
necessary to install 2 units of solenoid valve kit (CZ-P160HR3).
For details, refer to the supplied instructions manual with the
outdoor unit and solenoid valve kit.
• When using as the fresh air intake mode with connecting to the
2WAY VRF outdoor unit, it is necessary to connect with the RAP
valve kits (CZ-P160RVK2).
For details, refer to the section "9. HOW TO USE FRESH AIR
INTAKE MODE".
ø22.22
(Brazing connection)
ø9.52 (Flare connection)
Tightening torque (approximate)
: 34 ~ 42 N • m
Thickness of connecting tube
: 0.8 mm
280
: 34 ~ 42 N • m
: 0.8 mm
Insulation
tube
Longer screw
9
Gas tubing
Thermistor
(inside unit)
Cover plate
Dampened
shopcloths
(wet cloths)