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
Содержание NRL0280E
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