14
20.05 – 4138421_03
HYDRAULIC CIRCUITS
INTERNAL AND EXTERNAL HYDRAULIC CIRCUIT NYB
1
4
4
6
6
11
11
11
7
8
5
3
P
T
17
9
9
2
10
7
15
12
13
16
14
COMPONENTS PROVIDED AS STANDARD
1
Plate heat exchanger
2
Anti-freeze electric heater
3
Differential pressure switch
4
Water temperature sensors (IN/OUT)
5
Water filter (SUPPLIED)
HYDRAULIC COMPONENTS RECOMMENDED EXTERNAL TO UNIT (RESPONSIBILITY OF THE INSTALLER)
6
Anti-vibration joints
7
Air drain valve
8
Pump
9
Drain valve
10
Pressure gauge
11
Flow shut-off valves
12
Expansion vessel
13
Safety valve
14
Loading unit
15
Storage tank
16
Anti-freeze electric heater
17
Flow switch (MANDATORY)
WATER FEATURES
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
The units are completely wired at the factory and only require connection
to the electric power supply mains, downstream from a unit switch,
according to that envisioned by the Standards in force on this subject in the
country of installation.
It s also advised to check that:
- The electrical mains features are suitable for the absorption values
indicated in the electrical data table, also taking into consideration any
other machines functioning at the same time.
- The unit is only powered when installation has been completed
(hydraulic and electric).
- Respect the connection indications of the phase, and earth wires.
- The power supply line must have a relevant protection mounted
upstream against short circuits and dispersions to earth, which isolates
the system with respect to other utilities.
- The voltage must be within a tolerance of ±10% of the nominal power
supply voltage of the machine (for unbalanced three-phase unit
max 3% between the phases). Whenever these parameters are not
respected, contact the electric energy public body.
- For electric connections, use the cables with double isolation according
to the Standards in force on this subject in the different countries.
it is mandatory:
- The use of an omnipolar magnet circuit breaker switch, in compliance
with the current Standards (contact opening at least 0.12 in), with
suitable cut-off power and differential protection on the basis of the
electric data table shown below, installed as near as possible to the
appliance.
- To make an effective earth connection. The manufacturer cannot
be considered responsible for any damage caused by the lack of or
ineffective appliance earth connection.
- For units with three-phase power supply, check the correct connection
of the phases.
ATTENTION
• All the electrical operations must be carried out by personnel in
possession of the necessary qualifications by law, suitably trained and
informed on the risks related to these operations.
• The characteristics of the electrical lines and of the related
components must be determined by staff qualified to design
electrical systems, in compliance with the international and national
regulations of the place of installation of the unit and in compliance
with the regulations in force at the moment of installation
• For the installation requirements refer only to the wiring diagram
supplied with the unit. - The wiring diagram along with the manuals
must be kept in good condition and always available for any future
servicing on the unit.
• It is mandatory to verify that the machine is watertight before making
the electrical connections and it must only be powered up after the
hydraulic and electrical works have been completed.
• If the supply cord is damaged, it must be replaced by the manufacturer
or its service agent or a similarly qualified person in order to avoid a
hazard
ELECTRICAL DATA
The cable section shown in the table are recommended for maximum
lengths of 50m. For longer lengths or different cable laying,
it is up to the PLANNER to calculate the appropriate line switch, the power
supply line as well as the connection to the earth wire and connection
cables depending on:
- The length
- The type of cable
- The absorption of the unit and the physical location, and the ambient
temperature.
ELECTRICAL CONNECTIONS
Summary of Contents for NYB
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