Aermec Nrl f series User manual

14_09. 5641250_01

INSTALLATION MANUAL

NRL free cooling

280-750





CHILLER

• EXTERNAL UNIT

• HIGH EFFICENCY

• POWER SUPPLY 60Hz

60Hz

14_09. 5641250_01

NRL free cooling 0280-0750 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

414_09. 5641250_01

NRL free cooling 0280-0750 60Hz

INDEX

 ........................................................... 6

2. Check list .......................................................................................... 7

 ......................................................... 8

  ........................................ 8

  ... 9

  .............................................................................. 10

 ....................................................................... 10

  .................................................. 11

5.1. Minimum technical ......................................................................... 11

  ...................................................................................... 11

7. Dimension....................................................................................... 12

 ................................................................. 14

  ...................................................................... 16

  ......................................... 16

  ........................................ 16

  ............... 17

11. Hydraulic circuit .............................................................................. 19

  ................................................... 19

 .................................................... 20

11.3. System load .................................................................................... 21

11.4. Emptying the system....................................................................... 21

12. Electrical wirings ............................................................................. 22

 ........................................ 22

 ............................................................ 23

  ....................... 23

 ................................................................. 24

 ....................................................... 24

  ............................................... 24

14.3. Season changeover ......................................................................... 24

  ............................................................. 25

15.1. Cooling set point............................................................................. 25

 ............................................................................. 25

15.3. Compressor start delay ................................................................... 25

 ............................................................................. 25

  ............................................................................ 25

 ..................................................................... 25

16. Regular maintenance ...................................................................... 25

17. Extraordinary maintenance............................................................. 25

14_09. 5641250_01

NRL free cooling 0280-0750 60Hz

614_09. 5641250_01

NRL free cooling 0280-0750 60Hz



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. 



2. 

3. SOUND PRESSURE 

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



CSA C.22.1.- C.22.2

Safety Standard Electrical Installation.

14_09. 5641250_01

NRL free cooling 0280-0750 60Hz

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

 yes yes yes

 no yes yes

 no yes 

814_09. 5641250_01

NRL free cooling 0280-0750 60Hz

3. PRINCIPLE OF OPERATION SCHEMES

CPCP

TEV

BHE

V3V

3.1. PRODUCTION OF COLD WATER ONLY THE SYSTEM

Description Operation

1exchanger

SYSTEM SIDE



Production cold water

2exchanger

SOURCE SIDE



Heat exchange with the air

3exchanger

SYSTEM SIDE



Production cold water

H2O RETURN

SYSTEM

H2O DISCHARGE

SYSTEM

2Sign Description

CP compressor

CN Air side exchange

TEV Thermostatic valve

BHE Exchanger plate

V3V three-way valve

14_09. 5641250_01

NRL free cooling 0280-0750 60Hz

4. OPERATING LIMITS

Note:

1 - In summer mode the unit can be started







-







way valve that allows bypassing water from the





limits are achieved.

The devices in their standard configurations are not

suitable for installation in salty environments. 

the operating limits, refer to diagram, valid for AHRI

standard conditions.

Wind breaks should be implemented if the unit is

installed in particularly windy areas, to prevent a

malfunction of the unit.

4.1. 

ATTENTION

Contact our technical sales depart-

ment if the unit needs to operated

outside the operating limits.

ATTENTION

When the unit is installed in particularly

windy areas, we recommend installing



REFRIGERANT SIDE High pressure

side

Low pressure

side

Acceptable maximum pressure   

Acceptable maximum temperature   

Acceptable minimum temperature   

WATER SIDE

Acceptable maximum pressure  

Hydarulic circuit safety valve

(only in version with storage tank or with pump)



by discharging overpressure if abnormal work pressure occur.

External air temperature b.s.



 





104

113 114,8 °F

46 °C

36 °C

96,8 °F

122

-15

-10

-5

°C

°F

-6

-7

-8

-5

-4

-3

-2

-1

17,6

19,4

21,2

23,0

24,8

26,6

28,4

30,2

32,0

33,8

35,6

37,4

39,2

41,0

42,8

44,6

46,4

48,2

50,0

51,8

53,6

55,4

57,2

59,0

60,8

62,6

64,4

66,2

68,0

STANDARD

functioning

Functioning only with "I" funs

Functioning with

glycoled water

Functioning only with "I"

funs

water glycoled

10 14_09. 5641250_01

NRL free cooling 0280-0750 60Hz







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





AERMEC will not assume any respon-

sibility for damage due to failure to

follow these instructions.

Before beginning any operation,

READ THESE INSTRUCTIONS CARE-







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.

5. 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

"OF THE LIFTING"



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





con carri elevatori e cinghie preve-



EXAMPLE 1

"OF THE LIFTING"





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.

5.1. MINIMUM TECHNICAL

6. POSITIONING

This manual suits for next models

Table of contents

Other AERMEC Chiller manuals

AERMEC

AERMEC NRL 0280 User manual

AERMEC

AERMEC ANL User manual

AERMEC

AERMEC FHX User manual

AERMEC

AERMEC FCX Manual

AERMEC

AERMEC NRL FC 028 Manual

AERMEC

AERMEC NRL FC 2000 User manual

AERMEC

AERMEC FCS 22 User manual

AERMEC

AERMEC NYB User manual

AERMEC

AERMEC Variable Multi Flow ANL Series Manual

AERMEC

AERMEC ANK User manual

AERMEC

AERMEC NLC User manual

AERMEC

AERMEC VENICE User manual

AERMEC

AERMEC ANL 020 User manual

AERMEC

AERMEC NYB 500 RP Quick start guide

AERMEC

AERMEC NRL 028-075 User manual

AERMEC

AERMEC 1251 Technical document

AERMEC

AERMEC NRL FC 800 User manual

AERMEC

AERMEC NRW Series Installation and operation manual

AERMEC

AERMEC NRB 0800 Manual

AERMEC

AERMEC WRL 200 Instruction Manual

AERMEC

AERMEC CR Series Installation and operation manual

AERMEC

AERMEC NRB Series Manual

AERMEC

AERMEC NXW 0500 User manual

AERMEC

AERMEC NBW Series Installation and operation manual

Popular Chiller manuals by other brands

Trane

Trane RTAA-70 Installation & maintenance guide

Carrier

Carrier Omnizone 50BVC Installation, Start-Up, Service and Controls Operation and Troubleshooting

York

York YGWH 115 Installation, commissioning & operation

Galletti

Galletti PERFORMA MPE Series Technical manual

SMC Networks

SMC Networks HRR Series manual

Daikin

Daikin EWAQ016CAW Installation and operation manual

Trane

Trane CVHE Troubleshooting

Moffat

Moffat Friginox TSR-11SC Specification sheet

Gree

Gree GWH07AGA-K6DNA1C Service manual

MP Systems

MP Systems PURGE Series manual

Penguin

Penguin COLD THERAPY CHILLER owner's manual

Telemark

Telemark TVP-2000 Operation, installation and service manual

TICA

TICA MINI VRF CHR Series Installation & operation manual

MAXA

MAXA A68 Installation and operation manual

SABROE

SABROE ChillPAC operating manual

Aqua Optima

Aqua Optima Corona Instructions for use

Nordcap

Nordcap SKF 5 GN 1 manual

lancer

lancer Siberian Elite Series Installation, operation & service manual

AERMEC NRL F Series User manual

Popular Chiller manuals by other brands