AERMEC NRL FC 028 Manual

BARCODE
EN
Installation and Maintenance Manual
TRANSLATION FROM ORIGINAL
21.05 5641250_04
NRL FC 028-075
CHILLER
• HIGH EFFICENCY
• POWER SUPPLY 60Hz
GAS FREECOOLINGAHRI
CERTIFICATION
INTERTEK
CERTIFICATION
SCROLL
COMPRESSOR
AXIAL FAN PLATE
EXCHANGER
FREQUENCY
60Hz

AERMEC S.p.A. reserves the right at all times to make any modification for the improvement of its product and is not obliged to add these modification to machines of
previous manufacture that have already been delivered or are being built.
Dear Customer, Thank you for choosing an AERMEC product. This product is the result of many years of expe-
rience and in-depth engineering research, and it is built using top quality materials and advanced technologies.
In addition, the CE mark guarantees that our appliances fully comply with the requirements of the European
Machinery Directive in terms of safety. We constantly monitor the quality level of our products, and as a result
they are synonymous with Safety, Quality, and Reliability. Product data may be subject to modifications dee-
med necessary for improving the product without the obligation to give prior notice.
Thank you again.
AERMEC S.p.A

1. ........................................................... 5
2. Check list........................................................................................... 6
 ......................................................... 7
  ........................................ 7
  .................................................... 8
4.1. Minimum technical ........................................................................... 8
  ........................................................................................ 8
6. Dimension......................................................................................... 9
6.1.  .......................................................................... 9
  .......................................................................... 9
  .......................................................................... 9
  ............................................................. 10
  ................................................................................... 10
 ................................................................. 11
7.1.  ...................................................... 11
  ................................................................... 11
  ............................................................. 12
  ................................................................................... 12
8. Crate: special wood cover for transport (accessory)....................... 13
  ...................................................................... 14
  ...................................... 14
   ..................................... 14
  ............... 15
11. Hydraulic circuit .............................................................................. 17
11.1. Hydraulic circuit (versions ................................................... 17
11.2. Hydraulic circuit (versions.................................................... 18
11.3. System load .................................................................................... 19
11.4. Emptying the system....................................................................... 19
12. Electrical wirings ............................................................................. 20
 ........................................ 20
13. Electronic control (PCO5)................................................................ 22
14. User interface (PGD1)..................................................................... 24
15. Start-up procedure.......................................................................... 25
 ....................................................... 26
  ............................................................. 27

5
EN

chillers equipped with an external air cooling capacity
recovery system called "free-cooling".
The water free-cooling system consists in integrating
and eventually completely replacing the cooling capaci-
ty delivered by the compressors through an additional
water coil that exploits the low temperature of the
external air to cool the system's return water.
Maximum reliability
The presence of several scroll compressors allows NRL
chillers various partialisations of the cooling capacity.
OPERATING MODE:
FREE-COOLING ONLY:
when the external temperature is sufficiently low to
allow water cooling inside the free-cooling coils at
the desired temperature. This is the most economical
mode of the unit with only the fans operating in speed
modulation.
MIXED FREE-COOLING + COMPRESSORS:
the compressors operate in integration with the free-
cooling when the cooling capacity recovered from the
external air is no longer sufficient for the power requi-
red by the system. The higher the cooling capacity
recovery with free-cooling the lower the integration is.
COMPRESSORS ONLY:
when the external air temperature is greater than the
return temperature of the system water.
Models:
1. NRL "F" free-cooling
The versions can be in different set-ups at the same
time in order to satisfy a wide range of plant enginee-
ring solutions:
1. "A" HIGH EFFICIENCY
2. "E" SILENCED HIGH EFFICIENCY
3. "D" WITH DESUPERHEATER
The units with desuperheater (D) are not available in
the versions:
1. YD
2. XD
1. DESCRIPTION AND CHOCE OF UNIT

6
EN
2. CHECK LIST
"F" VERSION
Hydraulic circuit Version "F 00" 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
Water filter yes yes yes yes yes yes yes yes yes yes
 yes yes yes yes yes yes yes yes yes yes
Air vent yes yes yes yes yes yes yes yes yes yes
Hydraulic circuit
Version "P1…P4" 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
Water filter yes yes yes yes yes yes yes yes yes yes
 yes yes yes yes yes yes yes yes yes yes
Safety valve yes yes yes yes yes yes yes yes yes yes
Air vent yes yes yes yes yes yes yes yes yes yes
Pump yes yes yes yes yes yes yes yes yes yes
Expansion tank yes yes yes yes yes yes yes yes yes yes
Hydraulic circuit Version "01…04" 0280 0300 0330 0350 0500 0550 0600 0650 0700 0750
Water filter yes yes yes yes yes yes yes yes yes yes
 yes yes yes yes yes yes yes yes yes yes
Safety valve yes yes yes yes yes yes yes yes yes yes
Air vent yes yes yes yes yes yes yes yes yes yes
Pump yes yes yes yes yes yes yes yes yes yes
Expansion tank yes yes yes yes yes yes yes yes yes yes
Storage tank yes yes yes yes yes yes yes yes yes yes
Ciruit Components
Cooling circuit Model F B with D
Resistance carter compressor yes yes yes
High pressure switch yes yes yes
Low pressure switch no no no
High pressure trasducer yes yes yes
Low pressure trasducer yes yes yes
Solenoid valve of hot gas injecton yes yes yes
By-pass valve of hot gas no no yes
Exchanger (EV- EV/CN) yes yes yes
Exchanger (desuperheater) no yes yes
Exchanger (glycol free) no yes /

7
EN
3. PRINCIPLE OF OPERATION SCHEMES
CN
CN
CN
CPCP
TEV
TEV
BHE
V3V
3.1. PRODUCTION OF COLD WATER ONLY THE SYSTEM
Description Operation
1exchanger
SYSTEM SIDE
(EVAPORATION)
Production cold water
2exchanger
SOURCE SIDE
(CONDENSATION)
Heat exchange with the air
3exchanger
SYSTEM SIDE

Production cold water
H2O RETURN
SYSTEM
H2O DISCHARGE
SYSTEM
1
2
3
2Sign Description
CP compressor
CN Air side exchange
TEV Thermostatic valve
BHE Exchanger plate
V3V three-way valve

8
EN
Prima di procedere all'installazione dell'unità
concordare con il cliente la posizione dove andrà
collocata, ponendo attenzione ai punti seguenti:
The support surface must be capable of
supporting the unit weight.
The safety differences between the unit
and other appliances or structures must
be scrupulously respected so that the inlet
and outlet air from the fans is free to circu-
late.
The unit must be installed by an enabled
technician in compliance with the national
legislation in force in the country of desti-
nation, respecting the minimum technical
spaces in order to allow maintenance.
The machine is delivered from the factory wrapped
in estincoil. Before handling the unit, verify the
lifting capacity of the machines used. After removal
of packaging, movement of apparatus must be
carried out by qualified and adequately equipped
personnel.
The unit must be installed by a quali-
fied and suitably trained technician,
in compliance with the national
legislation in force in the country
of destination (Ministerial Decree
329/2004).
AERMEC will not assume any respon-
sibility for damage due to failure to
follow these instructions.
Before beginning any operation,
READ THESE INSTRUCTIONS CARE-


DANGER TO A MINIMUM. All the
staff involved must have thorough
knowledge of the operations and
any dangers that may arise at the
moment in which the installation
operations are carried out.
4. SELECTION AND PLACE OF
INSTALLATION
1100 mm
43 in
800 mm
31 in
800 mm
31 in
800 mm
31 in
3000 mm
118 in
ATTENTION:
The drawings are only examples.
EXAMPLE
2
"OF THE LIFTING"
NRL 0750 (always use all the provided eyebolts)
Before moving the unit, check the lifting
capacity of the machines used.
Once the packaging has been
removed, the unit must
be handled by qualified per-
sonnel, using the appropriate
equipment.
To handle the machine:

hook the lifting cables to the
special eyebolts In order to
avoid damaging the unit with
the cables, insert protection
elements between them and
the machine. Is it absolutely
forbidden to stand beneath
the unit.
ATTENTION
Always use all the provided eyebolts.
ATTENTION
L'unità viene fornita fissata su di
un pallet, per la movimentazione
con carri elevatori e cinghie preve-

EXAMPLE 1
"OF THE LIFTING"
Size 0280-0700.
Insert pipes (NOT SUPPLIED) in
holes on the base with length such
to allow positioning of the belts
used for lifting.
To prevent the unit structure
being damaged by the belts place
protections between the latter and
the machine.
It is prohibited to stop under the
unit.
NOTE:
The appliance warranty does not cover the costs for lad-
ders, scaffolding, or other elevation systems that may
become necessary for carrying out servicing under
warranty.
4.1. MINIMUM TECHNICAL
5. POSITIONING

9
EN
6. DIMENSION
6.1. 
1606 mm
63 in
1750 mm
69 in
1100 mm
43 in
2950 mm
116 in 3010 mm
119 in
1160 mm
46 in
1606 mm
63 in
1100 mm
43 in
2950 mm
116 in
1750 mm
69 in
3010 mm
119 in
1160 mm
46 in
6.2. 
6.3. 
3260 mm
128 in
1100 mm
43 in
1875 mm
74 in
3320 mm
131 in
1160 mm
46 in
2035 mm
80 in

10
EN
6.4. 
6.5. NRL 0750 FA
1990 mm
78 in
4010 mm
158 in
4070 mm
160 in
1100 mm
43 in
1160 mm
46 in
1875 mm
74 in
1955 mm
77 in
1500 mm
59 in
4355 mm
172 in ATTENTION:
NRL 0750 FA ALWAYS USE ALL THE
PROVIDED EYEBOLTS.