15
EVH-X SPACE 2.1 - 12.1
M0SM10N17-03
Hidraulic system
The pipes must be designed and manufactured to
limit pressure drops as much as possible, i.e.
optimise performance of the system.
Keep the following to a minimum:
• overall length
• number of bends
• number of vertical changes of direction
If the unit is to replace an existing unit, clean the
system thoroughly:
see Operation sequence on the following pages.
Water quality
Water quality can be verified by specialized
personnel.
Water with inadequate characteristics can cause:
• pressure drop increase
• energy efficiency decrease
• corrosive symptom increase
Water features:
• within the limits indicated by table
Risk of freezing
The unit must always be protected against
freezing. Otherwise irreversible damages may
occur.
If the unit or the relative water connections are
subject to temperatures close to 0°C:
• Mix water with ethylene glycol
• Safeguard the pipes with heating cables placed
under the insulation
• Empty the system in cases of long non-use
Anti-freeze solution
Consider that the use of anti-freeze solution
determines an increase in a pressure drop.
Make sure that the glycol type utilized is inhibited
(not corrosive) and compatible with the hydraulic
circuit components (pump etc).
Do not use glycol mixtures of different type (for
example ethylene + propylene).
Water flow-rate
The project water-flow must be:
• inside the exchanger operating limits (see the
TECHNICAL INFORMATION section)
• guarantee, also with variable system conditions
(for example in systems where some circuits are
bypassed in particular situations).
Min. installation water contents
Minimum system water volumes are described within
‘General technical data’ section and they have to be
satisfied to avoid continuous compressor switching
on and off.
Water filter
Use filter with mesh pitch:
Size 2.1-7.1 = 0,5 mm (400 mesh)
Size 10.1-12.1 = 0,6 mm (500 mesh)
It must be installed immediately in the water
input of the unit, in a position that is easily
accessible for cleaning.
The filter never should be removed, this
operation invalidates the guaranty.
Operating pressure
Max. pressure in the hydraulic circuit 6bar.
Provide a water treatment system if values fall
outside the limits.
The warranty does not cover damages caused
by limestone formations, deposits and impurities
from the water supply and / or failure from
failed system clearing to clean system.
5 WATER CONNECTIONS
PH
7,5÷9
SO
4
2-
< 100 ppm
HCO
3
-
/SO
4
2-
> 1
Total hardness
8 ÷ 15
f°
Cl
-
< 50 ppm
PO
4
3-
< 2,0 ppm
NH3 < 0,5 ppm
Free Chlorine < 0,5 ppm
Fe
3
+
< 0,5 ppm
Mn
++
< 0,05 ppm
CO
2
< 50 ppm
H
2
S < 50 ppb
Temperature < 65 °C
Oxygen content < 0.1 ppm
To Next Page
Loading...
Need help?
General
