Rinnai EHP-HS004MR32-EX2, Руководство пользователя и инсталлятора

Страница: 49 / 180

49
77 RREEFFRRIIGGEERRAATTIINNGG CCO ONNNNEECCTTIIO ONNSS
RReeffrriiggeerraanntt lliinneess
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.
NNO OTTEE
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.
NNO OTTEE

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.
W Waarrnniinngg::
FFiirree hhaazzaarrdd
FFllaam mm maabbllee m maatteerriiaallss
Before starting light operations:
ssaaffeettyy wwaarrnniinnggss ffoorr
ooppeerraattiioonnss oonn uunniittss
ccoonnttaaiinniinngg RR3322
77 RREEFFRRIIGGEERRAATTIINNGG CCO ONNNNEECCTTIIO ONNSS
1 2
DDuuccttiinngg
PPrreessssuurree EEqquuiippm meenntt DDiirreeccttiivvee
This unit is a subset: to operate it has to be combined to
another unit.
It is an installer responsability :
•
follow the PED Directive and to the national regulations of PED
Directive realization
•
consider the insertion of any additional security devices
•
check the safety device operation
•
write on the serial label number the amount of total
refrigerant
•
issue the Declaration of conformity
•
inform the user of the need to carry out regular checks
NNO OTTEE

Use only copper pipes for refrigeration, specifications for R32
The installation of the pipes may affect the level of noise in the
system:
• install flexible joints between the unit and the pipes
•
Install antivibration material between the brackets and the
pipes so as to prevent the transmission of vibrations
•
avoid the passage in particularly silent environments
Pipes must be clean.
Plug the ends of the pipe prior to passing it through a hole in
the wall (11).
Do not place the ends of pipes which have not been plugged or
closed with tape directly on the ground (22).
If the installation of the pipes is not to be completed within the
next day or for a long period of time, braze the ends of the
pipes and introduce nitrogen oxide via a Schrader valve access
joint to avoid the formation of humidity and the contamination of
the particles.
Equivalent length of the lines (metres ) = Effective length (metres)
+ (Q.ty of curves x K)
Consider K=00..33 m for wide radius 90° curves;
Consider K=00..55 m for standard 90° elbow curves
SSiizzee HHSS000044 -- HHSS001166
Refrigerant pipe min/max equivalent
length
A m 3 - 30
Maximum refrigerant pipe height
difference with outdoor unit higher
than indoors unit
B m 25
Maximum refrigerant pipe height
difference with outdoor unit underthan
indoor unit.
B m 25
RefRigeRating connectionS