16. INSTALLATION PROCEDURE
16.1 Cautionary points during installation
(1)
Be absolutely sure to keep dust and moisture from
entering the piping of the refrigeration unit.
Carry out the connecting of separate type of piping
under a roof, and avoid a rainy or windy day and
outdoor work as much as possible.
(2)
When glazing, pass N
2
(nitrogen) gas through the
piping in order to keep it from oxidation.
(3)
Pressurize with nitrogen gas before evacuating.
(4)
It is desirable to evacuate the system under the
ambient temperature of 10°C or more for more
than 60 minutes. The degree of evacuation should
be –0.1 MPa (750mmHg) or more. In order to
check for leakage, leave it for 5 minutes, and there
is no leakage if it keeps –0.1 MPa (750mmHg).
(5)
Put a cover or protector to the piping which sticks
out from the lowest tip of the body or the one
which is placed where it can be easily hit by stones
scattered by the wheel of the vehicle.
(6)
Select a place of 80°C or less ambient temperature
for wiring routing.
(7)
Clamp the cable at 500mm or less intervals to
avoid unnecessary sags. Use the clamp matching
to the thickness of the harness. And be sure that it
does not slide or pull out when slightly pulled.
Also be sure that the tip of the clamp does not cut
into or crush the harness.
(8)
As for wiring under the floor or exposed to
splashing water, set up a trap to prevent the
connector of the unit terminal harness from drop
of water.
(9)
Clamping of pipe and harness
(10) As for installation of the controller, select a place
strong enough to hold it. (Installation on plastic
section may cause damage to the unit.)
(11) Thermally insulate the low-pressure pipe.
(12) Adjust the installation position of the bracket, etc.
to align the engine and compressor (magnetic
clutch) at the deviation angle of 0.5 degrees or
less.
(13) Route the high-/low-pressure hoses with care to
consider the three-dimensional dislocation of the
compressor as 15mm in each direction in order to
prevent them from interfering with each other.
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