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Idiomas disponibles
Idiomas disponibles
3. 1
INTERNAL HYDRAULIC
CIRCUIT (standard equipment)
The unit is supplied in the various
versions of:
– "Standard NRA 00 (Only evaporators
without hydronic kit)" (fig 3)
- Plate heat exchanger
- Supplied filter
- Water inlet outlet probe
(SIW- SUW).
NOTE
For these versions it is possible TO INSTALL
THE HYDRAULIC PARALLEL ACCESSORY
IN ITS SEAT, including 2 flow switches (1 x
circuit) and the filter mounted. (fig 3/C)
– "NRA 01/02/03/04/05/06/07/08"
(accumulation, high or low pressure
pump with reserve pump option)"
(fig.3/A)
-
Plates heat exchanger
-
Assembled filter
-
Flow switch (1 per circuit)
-
Water inlet and outlet probes
(SIW- SUW)
-
2 Expansion tanks
-
Accumulation
-
Pumps (1 or 1+1 reserve pump,
high or low pressure; the switch-
over is manual)
3.2. 1
NRA 00 (STANDARD VERSIONS
WITHOUT HYDRONIC KIT)
HYDRAULIC CIRCUIT
3
-
Charging unit with pressure
gauge
-
Drain valve
-
Discharge valve
– "NRA P1/P2/P3/P4 (only high
or low pressure pump with reserve
pump option)" (fig.3/B)
-
Plates heat exchanger
-
Assembled filter
-
Flow switch (1 per circuit)
-
Water inlet and outlet probes
(SIW-SUW)
-
2 expansion tanks
-
Pumps (1 or 1+1 reserve pump,
high or low pressure; the switch-
over is manual)
-
Drain valve
-
Charging unit with pressure
gauge
NOTES
The presence of the filter should
be considered obligatory, and its
removal will make the guarantee
void. It must be kept clean, so it is
necessary to check its clean state
after the installation of the unit, and
check it regularly.
The installation of the manual
interception valves between the
unit and the rest of the system
should be considered obligatory for
all NRA models (with and without
accumulation) and for all the
hydraulic circuits that concern the
chiller itself (desuperheaters, total
recovery): if this is not done, the
guarantee will be considered void.
It is obligatory to carry out the
calibration of the flow switch on
the capacity values requested by
the system: if this is not done, the
guarantee will be considered void.
All the heat exchangers are fitted
with a heater.
3.2
PRELIMINARY OPERATIONS
HYDRAULIC CIRCUIT
Before connecting the chiller, it is a
good idea to run water through the
pipes to eliminate any foreign bodies
that could jeopardise the good working
of the device.
W h e n m a k i n g t h e h y d r a u l i c
connections, check that the indications
in the chapter "Hydraulic connections"
are respected. It is a good idea to
ensure that the connections can be
easily disconnected by means of pipe
unions with rotating couplings.
KEY
1 Plates exchanger with
integrated electric heater
2 Supplied filter not installed
Fig. 3
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