AERMEC NRL0280E, Installation And Maintenance Manual

22

NRL 0280-0750 60Hz

EN

11.  HYDRAULIC CIRCUIT

11.1. 

INTERNAL AND EXTERNAL HYDRAULIC CIRCUIT [NRL HA] "00" (STANDARD)

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.

THE DRAWINGS ARE ONLY EXAM-

PLES OF THE HYDRAULIC CIRCUIT.

STANDARD COMPONENT

1

Exchanger plate (SYSTEM SIDE)

2

Water filter (fitted)

3

Flow switch (fitted)

4

Water temperature probes (IN/OUT)

5

Ball stop drain

6

Air Vent

RECOMMENDED COMPONENTS NOT SUPPLIED 

(CHARGED TO THE INSTALLER)

6

Air Vent

7

Anti-vibration couplings

8

Pump

9

Storage tank

10

Expansion tank

11

Safety valve

12

Ball stop Tank

13

Charging unit

14

Ball Stop

15

Manometer

1

2

3

4

4

6

7

8

14

14

7

6

15

9

10

13

12

11

VERSIONE “00”

FORNITO DI SERIE:

1. scambiatore

2. filtro acqua

3. flussostato

4. sonde temperatura acqua (IN-OUT)

5. rubinetto di scarico

6. valvola di sfiato

NON FORNITO / CONSIGLIATO:

6. valvola di sfiato

7. giunti antivibranti

8. pompa

9. accumulo

10. vaso d’espansione

11. valvola di sicurezza (bar..?)

12. scarico accumulo

13. gruppo di caricamento

14. valvola d’intercettazione

15. manometro

HYDRAULIC COMPONENTS

NRL

EXTERNAL UNIT HYDRAULIC 

RECOMMENDED COMPONENT 

System: Chiller with plate heat exchanger

PH

7.5-9

Electric conductivity

10-500μS/cm

Total hardness

4.5-8.5°dH

Temperature

< 65°C

Oxygen content

< 0.1 ppm

Max. glycol amount

50%

Phosphates (PO4)

< 2ppm

Manganese (Mn)

< 0.05 ppm

Iron (Fe)

< 0.3 ppm

Alkalinity (HCO3)

70 - 300 ppm

Chloride ions (Cl-)

< 50 ppm

Sulphate ions (SO4)

< 50 ppm

Sulphide ion (S)

none

Ammonium ions (NH4)

none

Silica (SiO2)

< 30ppm