1 2 3 4 5 6 7
1
Evaporator water entry
2
Flow Switch
3
Water entry sensor
4
Water entry pipe with flow switch and
temperature sensor of the incoming water
5
Joint
6
Counter-pipe
7
In situ water pipe circuit
8
Filter
9
Filter and cup
The water in the system must be particularly clean and
all traces of oil and rust must be removed. Install a
mechanical filter at the entry of every heat exchanger.
The failure to install a mechanical filter allows solid
particles and/or welding burrs to get inside the
exchanger. We recommend installing a filter with a
filtering mesh with holes not larger than 1.1mm in
diameter.
The manufacturer cannot be maintained responsible for
any damage to the exchangers if the mechanical filters
are not installed.
Water treatment
Before putting the unit into operation, clean the water
circuit. Dirt, scales, debris and other material can
accumulate inside the heat exchanger and reduce both
its heat exchanging capacity and the flow of the water.
An adequate treatment of the water can reduce the risk
of corrosion, erosion, scale formation, etc. The must
suitable treatment must be selected depending on the
place of installation, considering the water system and
the characteristics of the water.
The manufacturer is not responsible for any damages
or malfunctions of the equipment
The quality of the water must comply with the
specifications listed in the following table.
Circulating
water
Water
supply
Possible
problems
Elements to be checked
pH at 25°C
6.8~8.0
6.8~8.0
Corrosion
+ limescale
Electrical
conductivity
[mS/m] at 25°C
<40
<30
Corrosion
+ limescale
Chlorine ion
[mg Cl˜/l]
<50
<50
Corrosion
Sulfate ion
[mg SO4²˜/l]
<50
<50
Corrosion
Alkalinity M
(pH4.8)
[mg CaCO3/l]
<50
<50
Limescale
Total hardness
[mg CaCO3/l]
<70
<70
Limescale
Hardness of the
Calcium
[mg CaCO3/l]
<50
<50
Limescale
Silicon ion
[mg SiO2/l]
<30
<30
Limescale
Elements of reference
Iron
[mg Fe/l]
<1.0
<0.3
Corrosion
+
Limescale
Copper
[mg Cu/l]
<1.0
<0.1
Corrosion
Sulphide ion
[mg S²˜/l]
Non
detectabl
e
Non
detectabl
e
Corrosion
Ammonium ion
[mg NH4+/l]
<1.0
<0.1
Corrosion
Remaining
Chloride
[mg Cl/l]
<0.3
<0.3
Corrosion
Free Carbide
[mg CO2/l]
<4.0
<4.0
Corrosion
Index of stability
-
-
Corrosion
+ limescale
The pressure of the water must exceed the
maximum operating pressure anticipated for the unit.
NOTE -
Plan adequate protections in the water circuit to
make sure that the pressure of the water never exceeds
the maximum limit allowed.
Flow and volume of the water
EWWQ Model
Minimum water
flow
l/s
Maximum
water flow
l/s
EWWQ090G
2.70
5.63
EWWQ100G
3.04
6.34
EWWQ120G
3.42
7.13
EWWQ130G
3.91
8.14
EWWQ150G
4.31
8.98
EWWQ170G
4.94
10.30
EWWQ190G
5.57
11.60
EWWQ210G
6.34
13.21
EWWQ240G
7.07
14.73
EWWQ300G
9.04
18.83
EWWQ360G
10.64
22.18
8
8
9
