Internal And External Hydraulic Circuit Anl 02-04 - AERMEC Variable Multi Flow ANL Series Installation And Maintenance Manual

ANL / 290-650
5.5. INTERNAL AND EXTERNAL HYDRAULIC CIRCUIT ANL 02-04
HYDRAULIC COMPO-
NENTS ANL
9
4
12
15
5
2
7
12
15
1 14
14
5
COMPONENTS PROVIDED AS STANDARD
1. Plate heat exchanger
2. Water filter
3. Flow switch
4. Air vent
5. Water temperature sensors (IN/OUT)
7. Isolating valve
8. Safety valve
9. Expansion tank
10. Accumulo impianto
11. Gauge
12. Pump
13. Electric anti-freeze heater
14. Drain valve
15. Non-return valve
COMPONENTS NOT PROVIDED AND RESPONSIBILITY OF THE INSTALLER
6. Anti-vibration joints
7. Isolating valve
MINIMUM WATER CONTENT
Number of compressors
Minimum recommended water content
WATER CHARACTERISTICS
System: Chiller with plate heat exchanger
PH 7,5-9
Electric conductivity 100-500 S/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
18.03. 5719210_03
HYDRAULIC COMPONENTS
RECOMMENDED EXTERNAL TO UNIT
4
8
11
3
6
10
13
6
14
290 300 340 400
n° 2 2 2 2
l/kW 4 4 4 4
7
7
580 620 650
2 2 2
4 4 4
EN
WARNING
The selection and installation
of components external to the
unit are the responsibility of the
installer and must be carried out
in accordance with good working
practices and applicable standards
of the country of destination.
WARNING
The hydraulic piping to the unit
must be adequately sized for the
required flow rate. The water flow
rate through the heat exchanger
must always be constant.
WARNING
Carefully clean the system prior to
connection to the unit. This clean-
ing eliminates welding slag, dirt,
rust or any other impurities from
the piping. These impurities may
otherwise be deposited within
the unit and cause a malfunction
The connecting piping must be
adequately supported so as not to
impose any weight onto the unit.
WARNING
SYSTEM DRAINING
During the winter period the water
in the heat exchanger may freeze
when the system is off, causing
irreversible damage to the heat
exchanger.
There are three solutions to avoid
the risk of freezing
1. Complete draining of water
from the unit.
2. Operating with glycol, with
a percentage of glycol se-
lected in accordance with the
minimum anticipated external
temperature.
3. Use of electric heaters.
In such cases the electric heat-
ers must always have power
available for the whole period
of possible freezing (unit in
stand-by)
11