16
IOM_WPVBZ HE-WPVZ HE_401-1201-4002_208110_200901_EN
PACKAGED COMPACT VERTICAL
– WATER / AIR
WPVBZ HE / WPVZ HE
INSTALLATION
HYDRAULIC CIRCUIT AND ITS COMPONENTS
The most delicate component of the hydraulic circuit is the plate exchanger. Therefore it is important that the units equipped
with plate exchangers operate in an open hydraulic circuit or a thermal loop within the control values as stated in the below
chart. If the Langelier rate is exceeded (lower or higher), the water may become corrosive or incrusting which would
jeopardise the equipment and thus cancel the warranty. In that case it is necessary to use a special exchanger specially
designed for the available water quality.
The units that are equipped with a plate exchanger can operate in an open hydraulic circuit or in a thermal loop provided
that the water quality matches the control values of the following chart.
Contents in water
Concentration mg/l
If higher values
If lower values
Suspended solids
Variable
Possible erosion of the material
No detection of effects
Conductivity
≤ 500 µs/cm
No detection of effects
-
> 500 µs/cm
-
Not recommended
NH
3
between 2 and 20
Not recommended
No detection of effects
Chlorides
≤ 300
-
No detection of effects
> 300
Corrosion
-
Iron
≤ 10
No detection of effects
-
> 10
-
Corrosion
Carbonic acids
between 20 and 50
Corrosion
Not recommended
PH
between 6 and 9
Incrusting
No detection of effects
Sulphates
between 70 and 300
Corrosion
No detection of effects
Langelier
between -0,5 and +0,5
Water with a tendency to creating incrustation
Agua that tends to be corrosive
Shut-off valves
Installed at the inlet and the outlet of each component, they allow to carry out the maintenance operations without having
to empty the installation.
Thermometers and pressure gauges
Installed at the inlet and the outlet of the main elements. They make maintenance and control operations easier.
Air release valves
Installed at the highest points of the installation. They enable air drainage of the circuit.
Drainage valves
Install them at all the low points to empty the circuit.
Supports
The weight of the pipes must not be supported by the connections of the unit. Therefore supporting brides shall be used.
Expansion vessel
The expansion vessels maintains the correct pressure in the installation. We recommend you to fill at 2.15 bar when the
water temperature varies from cold to heat and the other way round. The expansion vessel has to be dimensioned
according to the water volume in the installation.
Be careful that it might be necessary to install a bigger expansion vessel or additional expansion vessels even if the unit
already is equipped with one.
Security devices
The installation of the following safety devices is
MANDATORY
when they
ARE NOT
included as standard features.
Likewise it is mandatory to control that they work correctly and to maintain them. Not complying with this condition will
entail the
LOSS OF WARRANTY
.
Water filter
Fitted at the water inlet of the unit to protect the heat exchanger or other critical components from obstructions and/or
clogging.
Flow switch
This device protects the plate heat exchanger from breaking in case of insufficient water flow. This situation would
make the equipment inoperative.