AERMEC NRL FC 800 User manual



EN
INSTALLATION MANUAL
NRL free-cooling
800-1800
CHILLER
• EXTERNAL UNITS
• HIGHT EFFICIENCY
• POWER SUPPLY 60Hz
INRLFTY.1409.4086994_01

2Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
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 AERMEC. It is the fruit of many years of experience and special design studies and has
been made of the highest grade materials and with cutting edge technology.
In addition, all our products bear the EC mark indicating that they meet the requirements of the European
Machine Directive regarding safety. The standard of quality is permanently being monitored and AERMEC
products are therefore a synonym for Safety, Quality and Reliability.
The data may undergo modifications considered necessary for the improvement of the product, at any time
and without the obligation for any notice thereof.
Thank you again.
AERMEC S.p.A

3Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
KEY:
1. DESCRIPTION AND CHOCE OF UNIT .................................................................................................. 4
2. CHECK LIST.......................................................................................................................................... 5
3. PRINCIPLE OF OPERATION SCHEMES ................................................................................................ 6
3.1. PRODUCTION OF COLD WATER ONLY THE SYSTEM ......................................................................... 6
 ............................. 7
4. OPERATING LIMITS.............................................................................................................................. 8
4.1. DESIGN SPECIFICATIONS .................................................................................................................... 8
5. SELECTION AND PLACE OF INSTALLATION........................................................................................ 9
5.1. POSITIONING....................................................................................................................................... 9
5.2. MINIMUM TECHNICAL SPACES ......................................................................................................... 9
6. DIMENSIONS...................................................................................................................................... 10
 ........................................................................................................................ 10
 .............................................................................................................................. 10
 .................................................................................................................... 10
7. ANTIVIBRATION POSITIONING......................................................................................................... 11
 ....................................................................................................................... 11
 .................................................................................................................... 11
 .............................................................................................................................. 12
8. HYDRAULIC CONNECTION................................................................................................................ 12
 ............................................................................................................................... 12
 .................................................................................................................... 13
 .................................................................................................................... 13
  .......................................................................................... 16
 ........................................................................................... 17
8.6. SYSTEM LOAD ................................................................................................................................... 18
8.7. EMPTYING THE SYSTEM ................................................................................................................... 18
9. ELECTRICAL WIRINGS ....................................................................................................................... 19
9.1. RECOMMENDED SECTION OF ELECTRIC CABLES ........................................................................... 19
9.2. CONNECTION TO THE POWER SUPPLY............................................................................................ 20
9.3. TO ACCESS THE ELECTRIC BOX: ...................................................................................................... 20
9.4. ELECTRICAL POWER CONNECTION.................................................................................................. 20
9.5. AUXILIARY CONNECTIONS AT THE USER/INSTALLER EXPENSE..................................................... 20
 .................................................................................................................. 20
  .................................................................................................... 20
  ..................................................................................................................... 20
9.9. CONNECTION PR3 ............................................................................................................................ 20
 ....................................................................................................... 21
10.1. PREPARATION FOR COMMISSIONING............................................................................................. 21
10.2. FIRST COMMISSIONING OF THE MACHINE..................................................................................... 21
10.3. SEASON CHANGEOVER ..................................................................................................................... 21
10.3.1. SEASON CHANGE OF THE PANEL ON THE MACHINE...................................................................... 21
10.3.2. SEASON CHANGE OF PR3.................................................................................................................. 21
11. FUNCTIONING CHARACTERISTICS................................................................................................... 22
11.1. COOLING SET POINT ......................................................................................................................... 22
11.2. COMPRESSOR START DELAY ............................................................................................................. 22
11.3. CIRCULATION PUMP ......................................................................................................................... 22
 ......................................................................................................................... 22
11.5. WATER FLOW RATE ALARM .............................................................................................................. 22
12. REGULAR MAINTENANCE................................................................................................................. 22
12.1. HYDRAULIC CIRCUIT.......................................................................................................................... 22
12.2. ELECTRIC CIRCUIT ............................................................................................................................. 22
12.3. CHILLER CIRCUIT ............................................................................................................................... 22
12.4. MECHANICAL CONTROLS ................................................................................................................. 22
13. EXTRAORDINARY MAINTENANCE.................................................................................................... 23
13.1. LOADING PROCEDURE...................................................................................................................... 23

4Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
The NRL Free-cooling series appliances are water
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
Standards and Directives respected on
designing and constructing the unit:
PROTECTION RATING
1. IP 24
ACOUSTIC PART:
1. ISO DIS 9614/2

2. 
3. SOUND PRESSURE (EN ISO 3744)
REFRIGERANT GAS:
This unit contains fluoride gases with
greenhouse effect covered by the
Kyoto Protocol. Maintenance and
disposal must only be performed by
qualified staff.
STANDARD:
UL 1995
Heating and cooling equipment.
ANSI/NFPA
Standard 70 National Electrical code
(N.E.C.).
CSA C.22.1.- C.22.2
Safety Standard Electrical Installation.

5Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
2. CHECK LIST
Ciruit Components
Cooling circuit Model F with D
Resistance carter compressor
yes yes
High pressure switch yes yes
Low pressure switch no no
High pressure trasducer
yes yes
Low pressure trasducer yes yes
Solenoid valve of hot gas injecton no yes
By-pass valve of hot gas yes yes
Exchanger (EV- EV/CN) yes yes
Exchanger (desuperheater) no yes
Exchanger (glycol free) no no
Cock the liquid and discharge yes yes
hydraulic circuit Version "F 00" 800 900 1000 1250 1400 1500 1650 1800
Water filter
yes yes yes yes yes yes yes yes
Flow switch yes yes yes yes yes yes yes yes
Air vent yes yes yes yes yes yes yes yes
hydraulic circuit Version "P3…P4" 800 900 1000 1250 1400 1500 1650 1800
Water filter
yes yes yes yes yes yes yes yes
Flow switch yes yes yes yes yes yes yes yes
Safety valve yes yes yes yes yes yes yes yes
Air vent yes yes yes yes yes yes yes yes
Pump yes yes yes yes yes yes yes yes
Expansion tank yes yes yes yes yes yes yes yes
hydraulic circuit Version "03…04 " 800 900 1000 1250 1400 1500 1650 1800
Water filter
yes yes yes yes yes yes yes yes
Flow switch yes yes yes yes yes yes yes yes
Safety valve yes yes yes yes yes yes yes yes
Air vent yes yes yes yes yes yes yes yes
Pump yes yes yes yes yes yes yes yes
Expansion tank yes yes yes yes yes yes yes yes
Storage tank yes yes yes yes yes yes yes yes
Version with DESUPERHEATER "D"
hydraulic circuit Version "F with D" 800 900 1000 1250 1400 1500 1650 1800
Water filter no no no no no no no no
Differential pressure switch no no no no no no no no
Flow switch no no no no no no no no
Exchanger (desuperheater)
yes yes yes yes yes yes yes yes
hydraulic circuit "storage thank with D " 800 900 1000 1250 1400 1500 1650 1800
Water filter
(desuperheater) no no no no no no no no
Differential pressure switch
(desuperheater)
no no no no no no no no
Flow switch
(desuperheater) no no no no no no no no
Exchanger (desuperheater)
yes yes yes yes yes yes yes yes
Safety valve yes yes yes yes yes yes yes yes
Air vent yes yes yes yes yes yes yes yes
Pump yes yes yes yes yes yes yes yes
Expansion tank yes yes yes yes yes yes yes yes
Storage tank yes yes yes yes yes yes yes yes

6Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
CN
CN
CN
CPCP
TEV
TEV
BHE
V3V
3. PRINCIPLE OF OPERATION SCHEMES
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
(EVAPORATION FREE-COOLING)
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

7Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
CN
CN
CN
CPCP
TEV
TEV
BHE
V3V
BHE
3.2. COLD WATER PRODUCTION AND THE SYSTEM RECOVERY (DESUPERHEATER)
H2O SUPPLY
H2O DISCHARGE
Description Operation
1exchanger
SYSTEM SIDE
(EVAPORATION)
Production of cold water
2exchanger
SOURCE SIDE
(CONDENSATION)
Heat exchange with the air
3exchanger
SYSTEM SIDE
(EVAPORATION FREE-COOLING)
Production cold water
4exchanger
DESUPERHEATER
(CONDENSATION)
hot water (after heating - Swim-
ming pools ...)
H2O RETURN
SYSTEM
H2O SUPPLY
SYSTEM
1
3
Sign Description
CP Compressor
CN Air side exchange
TEV Thermostatic valve
BHE Exchanger plate
V3V three-way valve
2
2
4

8Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
4. SELECTION AND PLACE OF INSTALLATION
Before beginning installation consent with client and pay atten-
tion to the following recommendations:
1. The support surface must be capable of supporting the
unit weight;
2. The safety differences between the unit and ther applian-
ces or structures must be scrupulously respected so that
the inlet and outlet AIR from the fans is free to circulate;
3. The unit must be installed by an enabled technician in
compliance with the national legislation in force in the
country of destination, respecting the minimum technical
spaces in order to allow maintenance.
4.1. POSITIONING
The machine is delivered from the factory wrapped in estincoil.
Before moving the unit, check the lifting capacity of the machi-
nes used.
Once the packaging has been removed, the unit must be
handled by qualified personnel with the suitable equipment. To
handle the machine: see figure hook up the lifting belts to the
provided eyebolts (as indicated in figure).
WARNING: ALWAYS USE ALL THE PROVIDED EYEBOLTS
Interpose protections between the straps and the machine to
prevent the structure of the unit being damaged by the straps.
It is absolutely forbidden to stand under the unit.
Take into account that when the chiller is working, vibrations
may be generated; it is therefore advisable to install anti-vibra-
tion supports (AVX accessories), fitting them to the holes in the
base according to the assembly diagram.
It is compulsory to provide the necessary technical spaces, to
allow REGULAR AND EXTRAORDINARY MAINTENANCE INTER-
VENTIONS Fasten the unit by checking carefully that its on the
same level; check that easy access to the hydraulic and electric
part is allowed.
4.2. MINIMUM TECHNICAL SPACES
3000 mm 110.11 in HEIGHT
ATTENTION:
ALWAYS USE THE
RELEVANT EYE-
BOLTS
800 mm
31 in
1100 mm
43 in
800 mm
31 in
800 mm
31 in
The unit must be installed by a qualified 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 responsibility for damage due to failure to follow these instructions.
Before beginning any operation, READ THESE INSTRUCTIONS CAREFULLY AND CARRY OUT THE SA-
FETY CHECKS TO REDUCE ALL RISK OF 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.

9Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
5. DIMENSIONS
5.1. NRL 800 - 900 - 1000 F 5.2. NRL 1250 - 1400 - 1500 F
5.3. NRL 1650 - 1800 F
3400 mm
134 in
2200 mm
87 in
2450 mm
96 in 2450 mm
96 in
2200 mm
87 in
4250 mm
167 in
5750 mm
226 in
2200 mm
87 in
2450 mm
96 in

10 Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
7.2. NRL 1250 - 1400 - 1500 F
7. ANTIVIBRATION POSITIONING
7.1. NRL 800 - 900 - 1000 F
100 mm
4 in
2800 mm
110 in
100 mm
4 in
100 mm 4 in
100 mm 4 in
2000 mm 79 in
2100 mm 83 in
1825 mm
72 in
2000 mm 79 in
2100 mm 83 in
1825 mm
72 in
100 mm
4 in
100 mm
4 in
100 mm 4 in
100 mm 4 in

11Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
400 mm
16 in
400 mm
16 in
720 mm
28 in
1915mm
75 in
1915mm
75 in
2100 mm 83 in
50 mm 2 in
50 mm 2 in
7.3. NRL 1650 - 1800 F
8. HYDRAULIC CONNECTION
8.1. NRL 800 - 900 - 1000 F
2450 mm 96 in
86 in
2191 mm
240 mm
9 in
341mm
13 in
1500 mm 59 in
IN
3”
OUT
3”

12 Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
8.2. NRL 1250 - 1400 - 1500 F
8.3. NRL 1650 - 1800 F
2450 mm 96 in
240 mm
9 in
2191mm 86 in
341mm
13 in
400 mm
15 in3850 mm 151 in
1925 in1925 mm
OUT
4”
IN
4”
2675 mm 105 in
5350 mm 210 in
280 mm
11 in
240 mm
9 in
265 mm
10 in
400 mm
400 in
2450 mm
2191mm
96 in
86 in
OUT
4”
IN
4”

13Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
8.3.1. NRL 0800 - 0900 - 1000 [P3 - P4] FC
2450 mm 96 in
86 in
2190 mm
420mm 16in
240mm 9in
1500mm
3000mm 118in
400mm
15in
1300mm
59in
51 in
IN 4”
4”
OUT
8.3.2. NRL 1250 - 1400 - 1500 [P3 - P4] FC
2450mm 96in
86in
16in
11in
1727mm
1927mm
2190mm
424mm 280mm
3850mm
67in
75in
151in
400mm
15in
IN
4”
4”
OUT

14 Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
2450mm 96in
5350mm 210in
2675mm 105in
2535mm 99in
2190mm 86in
420mm
16in
280mm
11in
400mm
15in
OUT
4”
IN
4”
4”
8.3.3. NRL 1650-1800 [P3 - P4] FC
400
2450 2190
420 240
1300
IN
4”
4”
OUT
4”
2450mm
3000mm 118in
1084mm 42in
400mm
15in
572mm
352mm
352in
2190mm
241mm 9in
86in
96in
22in
8.3.4. NRL 0800-0900-1000 [03-04] FC

15Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
IN
4”
OUT
4”
2450mm
2190mm
280mm
11in
96in
86in
210in5350mm
1577mm 62in 1098mm 43in
400mm
15in
572mm
22in
8.3.5. NRL1650-1800 [03-04] FC
IN
4”
OUT
4”
3850mm
2450mm
572mm
22in
244mm
9in
2191mm
96in
861in
1583mm 62in
341mm
13in
400mm
15in
151in
8.3.6. NRL 1250-1400-1500 [03-04] FC

16 Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
1
2
7
8
G
Gx
Gy
4
3 5
6
TOP VIEW
MODEL
Version
Hydronic kit
EMPTY RUNNING KIT AVX
WEIGHT CENTRE OF GRAVITY TOTAL WEIGHT
WATER
CENTRE OF GRAVITY
lbs XG mm XG in YG mm YG in lbs XG mm XG in YG mm YG in
NRL 800 FA
00 5225 1382 54 1314 52 5534 309 1410 55 1302 51 AVX 739
03 5952 1362 54 1202 47 7871 1918 1353 53 1034 41 AVX 740
04 6063 1360 54 1188 47 7981 1918 1351 53 1025 40 AVX 740
P3 5556 1346 53 1258 50 6063 507 1356 53 1223 48 AVX 741
P4 5666 1336 53 1241 49 6173 507 1346 53 1208 48 AVX 741
NRL 900 FA
00 5512 1421 56 1299 51 5864 353 1446 57 1281 50 AVX 739
03 6261 1397 55 1191 47 8223 1962 1381 54 1028 40 AVX 743
04 6393 1394 55 1175 46 8356 1962 1378 54 1019 40 AVX 743
P3 5886 1383 54 1243 49 6415 529 1390 55 1206 47 AVX 744
P4 6019 1370 54 1224 48 6548 529 1378 54 1189 47 AVX 744
NRL
1000 FA
00 5820 1406 55 1332 52 6217 397 1430 56 1317 52 AVX 745
03 6570 1385 55 1226 48 8576 2006 1373 54 1065 42 AVX 746
04 6702 1381 54 1210 48 8708 2006 1370 54 1055 42 AVX 746
P3 6195 1370 54 1278 50 6768 573 1379 54 1243 49 AVX 747
P4 6327 1358 53 1259 50 6900 573 1368 54 1226 48 AVX 747
NRL
1250 FA
00 7121 1824 72 1350 53 7496 375 1849 73 1337 53 AVX 748
03 7915 1751 69 1254 49 9899 1984 1667 66 1110 44 AVX 749
04 8091 1737 68 1236 49 10075 1984 1658 65 1097 43 AVX 749
P3 7540 1785 70 1298 51 8091 551 1794 71 1268 50 AVX 750
P4 7716 1769 70 1278 50 8267 551 1779 70 1250 49 AVX 750
NRL
1400 FA
00 7430 1799 71 1320 52 7871 441 1825 72 1303 51 AVX 752
03 8223 1731 68 1231 48 10274 2050 1655 65 1091 43 AVX 753
04 8400 1718 68 1214 48 10450 2050 1646 65 1080 43 AVX 753
P3 7848 1763 69 1272 50 8466 617 1774 70 1239 49 AVX 754
P4 8025 1748 69 1253 49 8642 617 1760 69 1222 48 AVX 754
NRL
1500 FA
00 7672 1828 72 1343 53 8157 485 1853 73 1328 52 AVX 757
03 8488 1757 69 1251 49 10604 2116 1680 66 1114 44 AVX 753
04 8708 1741 69 1231 48 10604 1896 1680 66 1114 44 AVX 753
P3 8113 1788 70 1292 51 8796 683 1799 71 1261 50 AVX 758
P4 8311 1771 70 1269 50 8995 683 1782 70 1241 49 AVX 758
1650 FA
00 9348 2478 98 1305 51 9899 551 2465 97 1277 50 AVX 761
03 10185 2455 97 1231 48 12346 2161 2411 95 1104 43 AVX 762
04 10384 2449 96 1215 48 12544 2161 2408 95 1092 43 AVX 762
P3 9789 2465 97 1264 50 10538 750 2449 96 1225 48 AVX 763
P4 10009 2459 97 1246 49 10737 728 2444 96 1209 48 AVX 763
1800 FA
00 9877 2481 98 1317 52 10516 639 2470 97 1294 51 AVX 766
03 10692 2459 97 1246 49 12941 2249 2418 95 1126 44 AVX 762
04 10913 2454 97 1229 48 13162 2249 2414 95 1114 44 AVX 762
P3 10318 2469 97 1277 50 11133 816 2455 97 1243 49 AVX 763
P4 10516 2463 97 1260 50 11354 838 2450 96 1228 48 AVX 763
NRL FREECOOLING 800 - 1800

17Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
MODEL
Version
Hydronic kit
PERCENTAGE OF WEIGHT DISTRIBUTION SUPPORTS (%)
12345678
%%%%%%%%
NRL 800 FA
00 11,5% 16,7% 20,4% 29,6% 8,9% 12,9% - -
03 16,8% 14,9% 24,9% 22,1% 11,3% 10,0% - -
04 17,0% 14,8% 25,0% 21,9% 11,3% 9,9% - -
P3 13,4% 16,8% 22,2% 27,8% 8,8% 11,1% - -
P4 13,8% 16,8% 22,5% 27,4% 8,8% 10,7% - -
NRL 900 FA
00 11,0% 15,4% 21,3% 29,7% 9,4% 13,1% - -
03 16,2% 14,2% 25,5% 22,4% 11,6% 10,2% - -
04 16,4% 14,1% 25,6% 22,1% 11,7% 10,1% - -
P3 12,9% 15,6% 23,0% 27,9% 9,3% 11,3% - -
P4 13,3% 15,6% 23,4% 27,5% 9,3% 10,9% - -
NRL 1000 FA
00 10,7% 16,0% 20,7% 30,9% 8,7% 13,0% - -
03 15,6% 14,7% 25,0% 23,5% 11,0% 10,3% - -
04 15,9% 14,6% 25,1% 23,2% 11,0% 10,2% - -
P3 12,4% 16,1% 22,4% 29,1% 8,7% 11,3% - -
P4 12,8% 16,2% 22,8% 28,7% 8,6% 10,9% - -
NRL 1250 FA
00 10,4% 16,1% 20,1% 31,1% 8,8% 13,6% - -
03 15,7% 16,0% 25,1% 25,6% 8,7% 8,9% - -
04 16,0% 16,0% 25,4% 25,3% 8,7% 8,6% - -
P3 11,9% 16,2% 21,6% 29,4% 8,9% 12,0% - -
P4 12,3% 16,2% 22,0% 29,0% 8,9% 11,7% - -
NRL 1400 FA
00 10,7% 15,5% 21,7% 31,5% 8,4% 12,2% - -
03 15,7% 15,5% 26,3% 25,9% 8,3% 8,2% - -
04 16,1% 15,5% 26,6% 25,6% 8,3% 8,0% - -
P3 12,1% 15,6% 23,1% 29,8% 8,5% 10,9% - -
P4 12,5% 15,6% 23,5% 29,4% 8,5% 10,6% - -
NRL 1500 FA
00 9,6% 14,7% 21,9% 33,4% 8,1% 12,3% - -
03 14,7% 15,1% 26,6% 27,3% 8,0% 8,3% - -
04 14,7% 15,1% 26,6% 27,3% 8,0% 8,3% - -
P3 11,1% 14,9% 23,4% 31,5% 8,1% 10,9% - -
P4 11,6% 15,0% 23,9% 30,9% 8,1% 10,6% - -
1650 FA
00 11,3% 15,7% 12,7% 17,6% 10,1% 13,9% 7,9% 10,9%
03 12,2% 12,3% 18,2% 18,3% 12,0% 12,0% 7,4% 7,5%
04 12,3% 12,1% 18,6% 18,3% 12,1% 11,9% 7,4% 7,3%
P3 11,6% 14,6% 14,2% 17,9% 10,6% 13,4% 7,8% 9,8%
P4 11,7% 14,3% 14,7% 18,0% 10,8% 13,2% 7,8% 9,5%
1800 FA
00 11,1% 15,9% 12,5% 17,9% 9,7% 13,8% 7,9% 11,2%
03 12,1% 12,6% 17,7% 18,6% 11,5% 12,1% 7,5% 7,9%
04 12,1% 12,4% 18,1% 18,6% 11,7% 12,0% 7,5% 7,7%
P3 11,4% 14,9% 14,0% 18,2% 10,2% 13,3% 7,8% 10,2%
P4 11,5% 14,6% 14,5% 18,3% 10,4% 13,1% 7,8% 9,9%
NRL FREECOOLING 800 - 1800

18 Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
8.4. HYDRAULIC CIRCUIT (VERSIONS P3-P4)
STANDARD COMPONENT
1
Exchanger plate
2
Free-cooling coil
3
Water filter
4
Ball stop
5
Flow switch
6
Air Vent
7
3-way valve
8
Pump
9
Expansion tank
10
Ball stop drain
RECOMMENDED COMPONENTS NOT SUPPLIED
(CHARGED TO THE INSTALLER)
11
Anti-vibration couplings
12
Ball stop
13
Safety valve
14
Charging unit
15
Manometer
16
Storage tank
17
Storage tank ball stop drain
1
2
34 4
5
7
11
11
10
14
8
12
12
4
69
13
15
17
6
16
9
hydraulic components NRL P3-P4 hydraulic components NOT SUPPLIED
ATTENTION
The choice and the installation of
components external to the NRL
up to the installer, who must ope-
rate according to the rules of good
technical design and in compliance
with the regulations in force in the
country of destination.
ATTENTION
The hydraulic pipes connecting to
the machine must be properly si-
zed to the actual flow of water re-
quired by the system in operation.
The water flow to the exchanger
must always be constant.
ATTENTION
Carefully wash the plant, before
connecting the unit. This allows
cleaning to remove any residue
such as weld spatter, slag, rust or
other impurities from the pipes.
These substances may otherwise
accumulate in and cause a machi-
ne malfunction. The connecting
pipes should be supported so as
not to weigh, with their weight on
the unit.
ATTENTION
The hydraulic parallel is in charge
of the installer.
NOTE
The drawings are only examples
of the hydraulic circuit.
PH 6-8
Electric conductivity less than 200 mV/cm (25°C/77°F)
Chloride ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 50 ppm
Sulphur ions none
ammonia ions none
Silicone ions less than 30 ppm

19Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
8.5. HYDRAULIC CIRCUIT (VERSIONS 03-04)
STANDARD COMPONENT
1
Exchanger plate
2
Free-cooling coil
3
Water filter
4
Ball stop
5
Flow switch
6
Air Vent
7
3-way valve
8
Pump
9
Expansion tank
10
Safety valve
11
Storage tank
12
Storage tank ball stop drain
13
Ball stop drain
RECOMMENDED COMPONENTS NOT SUPPLIED
(CHARGED TO THE INSTALLER)
14
Anti-vibration couplings
15
Ball stop
16
Charging unit
17
Manometer
6
1
2
34 4
5
6
7
10
13
15
16 17
814
14
4
11
15
12
9
hydraulic components NRL 03-04 hydraulic components NOT SUPPLIED
PH 6-8
Electric conductivity less than 200 mV/cm (25°C/77°F)
Chloride ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 50 ppm
Sulphur ions none
ammonia ions none
Silicone ions less than 30 ppm
ATTENTION
The choice and the installation of
components external to the NRL
up to the installer, who must ope-
rate according to the rules of good
technical design and in compliance
with the regulations in force in the
country of destination.
ATTENTION
The hydraulic pipes connecting to
the machine must be properly si-
zed to the actual flow of water re-
quired by the system in operation.
The water flow to the exchanger
must always be constant.
ATTENTION
Carefully wash the plant, before
connecting the unit. This allows
cleaning to remove any residue
such as weld spatter, slag, rust or
other impurities from the pipes.
These substances may otherwise
accumulate in and cause a machi-
ne malfunction. The connecting
pipes should be supported so as
not to weigh, with their weight on
the unit.
ATTENTION
The hydraulic parallel is in charge
of the installer.
NOTE
The drawings are only examples
of the hydraulic circuit.

20 Aermec cod. INRLFTY.1409.4086994_01
NRL FC 800-1800 60Hz
GB
8.6. SYSTEM LOAD
−Before starting the load, check that the system
drain tap is closed.
−Open all the drain valves of the system and of the
related terminals.
−Open the shut-off devices of the system.
−Start the filling by slowly opening the water
system load cock placed outside the machine.
−When water begins to flow from the terminal vent
valves, close them and continue loading up to
read on the gauge the value of 1.5 bar.
The system is loaded at a pressure between 1 and 2
bar.
-
chine has worked for some hours and to periodically
check the system pressure, restoring if it drops below
1 bar.
Check the hydraulic seal of the joints.
8.7. EMPTYING THE SYSTEM
−Before starting to drain the system, turn "off" the
unit
−Check that the water system load/restore tap is
closed
−Open the drain tap outside the machine and all
the vent valves of the system and the correspon-
ding terminals.
If the system uses glycol, this liquid should not be
drained to the environment because it is a pollutant. It
must be collected and, if possible, reused.
ATTENTION
In case of version with pumping
unit, without standby pump, it
is recommended to install unidi-
rectional valves to the delivery of
each module.
So water reflow is avoided
in the circuit of the pump/s
from the other circuit.
For NRL 2250 model with pumping
unit, it is recommended the
installation, to the delivery of the
module 1250, of a capacity balan-
ce valve, to balance the capacities
between the two evaporators
(module
1000 and 1250).
It is necessary, that the water flow
rate to the chiller unit complies
with the values reported in the
performance tables.
The systems loaded with anti-
freeze or specific regulations, need
the water backflow system.
Special supply/recovery water,
is carried out with appropriate
treatment systems.