Hydraulic Circuit; Internal Hydraulic Circuit (Standard Equipment); Preliminary Operations Hydraulic Circuit; Hydraulic Circuit Internal Nrc (°) - AERMEC NRC Serie Manual Instalación

3. 1 INTERNAL HYDRAULIC
CIRCUIT (standard equipment)
The unit is supplied in the various
versions of:
– " S t a n d a r d N R C
evaporators, without hydronic kit)
- Plate heat exchanger
- Filter supplied
- Differentual pressure switch
– "NRC 01/02/03/04/05/06/07/08"
(storage tank, high or low pressure
pump with reserve pump option)"
- Plate heat exchanger
- Filter assembled
- Expansion tanks (1 in the models
from 0275 to 0750; 2 in the
models from 0800 to 1000)
- Expansion vessel
- Buffer tank
- Pumps (1 or 1+1 reserve, high
or low pressure
- Bleed valve
- Flow switch
- automatic feeding
- Safety valve
– "NRC P1/P2/P3/P4 (only high or
low pressure pump with reserve
pump option)"
- Plate heat exchanger
- Filter supplied
- Expansion vessel
- Pumps (1 or 1+1 reserve, high
or low pressure
- Flow switch
- automatic feeding
3.2. 1 Hydraulic circuit internal NRC (°)
6

HYDRAULIC CIRCUIT

3
- Flow switch
- Safety valve
- Bleed valve
NOTES
The presence of the filter should
0 0 ( o n l y 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.
WARNING: for sizes 0800-0900-
1000, the filter is supplied for all the
versions.
The installation of the manual
interception valves between the unit
and the rest of the system should
be considered obligatory for all NRC
models (with and without storage
tank) 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.
All the flow switches in the NRC
units have been factory-calibrated
for correct working with a nominal
water flow rate. In the vast majority
of cases, this means no additional
operations are necessary.
All the heat exchangers are fitted
with an electric heater.
The parallel water connections are to
be made by the installation engineer.
EV
KEY
1 - Water filter;
2 - Differential pressure switch;
1
A
2
B
EV - Evaporator circuit;
A - Water inlet;
B - Water outlet;
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.