D
–EIMWC00408-16EN - 13/60
ATTENTION
Install a mechanical filter on the inlet to each heat exchanger. Failure to install a mechanical filter allows solid
particles and/or welding slag to enter the exchanger. Installation of a filter with a mesh size not exceeding 0.5
– 1
mm in diameter is advised.
The manufacturer cannot be held responsible for any damage to exchangers ensuing from the lack of a mechanical
filter.
Water treatment
Before putting the machine into operation, clean the water circuit. Dirt, scaling, corrosion residue and other foreign
material can accumulate inside the heat exchanger and reduce its heat exchanging capacity. Pressure drops can
increase as well, thus reducing water flow. Proper water treatment therefore reduces the risk of corrosion, erosion,
scaling, etc. The most appropriate water treatment must be determined locally, according to the type of system and local
characteristics of the process water.
The manufacturer is not responsible for damage to or malfunctioning of equipment caused by failure to treat water or by
improperly treated water.
Table 1 - Acceptable water quality limits
PH (25°C)
6.8
8.0
Total hardness (mg CaCO
3
/ l)
200
Electricity conductivity
S/cm (25°C)
800
Iron (mg Fe / l)
1.0
Chloride ion (mg Cl
-
/ l)
200
Sulphide ion (mg S
2 -
/ l)
None
Sulphate ion (mg SO
2
4
-
/ l)
200
Ammonium ion (mg NH
4
+
/ l)
1.0
Alkalinity (mg CaCO
3
/ l)
100
Silica (mg SiO
2
/ l)
50
Evaporator and exchangers anti-freeze protection
Two or more of below protection methods should be considered when designing the system as a whole:
1. Continuous water flow circulation inside piping and exchangers.
2. Addition of an appropriate amount of glycol inside the water circuit.
3. Additional heat insulation and heating of exposed piping.
4. Emptying and cleaning of the heat exchanger during the winter season.
It is the responsibility of the installer and/or local maintenance personnel to ensure that two or more of the described anti-
freeze methods are used. Make sure that appropriate anti-freeze protection is maintained at all times. Failure to follow
the instructions above could result in damage
to some of the machine’s components. Damage caused by freezing is not
covered by the warranty.
Installing the flow switch
To ensure sufficient water flow through the evaporator, it is essential that a flow switch be installed on the water circuit.
The flow switch can be installed either on the inlet or outlet water piping. The purpose of the flow switch is to stop the
machine in the event of interrupted water flow, thus protecting the evaporator from freezing.
A flow switch specifically gauged for this purpose, with identification code 131035072, is available as an option.
This paddle-type flow switch is suitable for heavy-duty outdoor applications (IP67) for pipe diameters in the range of 1" to
6".
The flow switch is provided with a clean contact which must be electrically connected to the terminals of the terminal
board (check the machine
’s wiring diagram for further information).
For further information regarding device installation and settings, please read the instruction leaflet in the device box.
