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RefRigeRating connectionS
7 7 R R E E F F R R I I G G E E R R A A T T I I N N G G C C O O N N N N E E C C T T I I O O N N S S
8. REFRIGERATING CONNECTIONS
R R e e f f r r i i g g e e r r a a n n t t l l i i n n e e s s
Unit is designed to ensure the best comfort and energy efficiency
levels. To maintain these high values is necessary to consider the
system details that could adversely affect on performances.
In particular:
the length of the refrigerant piping should be as small as
possible ;
to realize a path of the pipes as straight as possible by
limiting the presence of curves;
properly insulate pipes;
properly load the refrigerant system.
An incorrect sizing can cause damage to the compressor or
variations in the cooling capacity .
When cut-off parts (solenoid valves, taps etc) are installed pay
attention to the possible formation of traps for the refrigerant,
meaning closed zones up or downstream in which the refrigerant
is unable to expand freely.
With an increase in temperature under these circumstances
(exposure to the sun, ducting close to heat sources etcs) the
expansion of the trapped gas could cause an explosion in the
refrigerating ducting. Evaluate the possibility of installing a safety
valve especiallly in the ducting of the liquid which is exposed to
the most risk.
The operations must be carried out by an expert refrigerationist .
Avoid curves with a too small curving radius.
Avoid squashing the pipes.
Provide anchoring rods to support the ducting (the weight must
not be on the unit).
The rods must allow the thermal dilation of the ducting.
Place anti-vibrating material between the rods and the ducting to
avoid the transmission of vibrations.
Clean with nitrogen or dry air before attaching the ducting to the
two units.
The internal unit and the heat exchanger must be connected with
refrigerating ducting suitable for the refrigerant used and covered
with thermal insulation.
48
N N O O T T E E
N N O O T T E E
W W a a r r n n i i n n g g : :
F F i i r r e e h h a a z z a a r r d d
F F l l a a m m m m a a b b l l e e m m a a t t e e r r i i a a l l s s
Before starting light operations:
s s a a f f e e t t y y w w a a r r n n i i n n g g s s f f o o r r
o o p p e e r r a a t t i i o o n n s s o o n n u u n n i i t t s s
c c o o n n t t a a i i n n i i n n g g R R 3 3 2 2
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