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IOM_WPHBA HE-WPHA HE_091a1201_207815_180701_EN
HORIZONTAL WATER-AIR COMPACT PACKAGED UNITS
WPHA HE / WPHBA HE
INSTALLATION
WPHA / WPHBA HYDRAULIC CIRCUIT AND ITS COMPONENTS
Within the hydraulic circuit and its components, the plate heat exchanger is the most delicate affected part, and as a result
must follow at least these guidelines:
-
The installation must be made according to the diagram of hydraulic connections (see below).
-
The maintenance of both the filter and the flow switch must be done within periods in which the locking dressings
are avoided.
-
The inlet and outlet water of the unit must be respected and install, if necessary, a bypass valve.
The units that incorporate a plate heat exchanger must work in both an open hydraulic circuit and a thermal ring within the
control values in the attached table.
Surpassing the Langelier index below or above can generate corrosive or fouling water, so the component would be at risk
and the equipment warranty would be denied. In this case, you should work with a secondary exchanger, adapted to the
quality of the water.
Element contained in
water
Concentration by mg/l
Effects of a higher value
Effects of a lower value
Suspended solids
Variable
Can deteriorate the material
No effects are observed
Conductivity
≤ 500 µs/cm
No effects are observed
-
> 500 µs/cm
-
Not recommended
NH
3
Must be between 2 and 20
Not recommended
No effects are observed
Chlorides
≤ 300
-
No effects are observed
> 300
Corrosion
-
Iron
≤ 10
No effects are observed
-
> 10
-
Incrustations
Carbonic acids
Must be between 20 and 50
Corrosion
Not recommended
PH
Must be between 6 and 9
Incrustations
Corrosion
Sulphates
Must be between 70 and 300
Corrosion
No effects are observed
Langelier
Must be between -0,5 and +0,5
Water with tendency to create
incrustations
Water with corrosive
tendency
WATER CONNECTIONS WITH OPTIONAL PRESOSTATIC VALVE
Install the Bypass solenoid valve with presostatic valve option in the heat pump units.
1. Antivibratory coupling
2. Shut off valve
3. Presostatic valve
4. Solenoid valve ON/OFF
5. Flow switch
6. Mesh filter
7. Condensates drainage network /
Empty
8. Solenoid valve ON/OFF with the
compressor
9. Manometer
10. Drain valve
NOTE:
The pressure tap of the presostatic valve must be connected to the high pressure outlet of the unit. Graphs show connections for heat pump units. In
case of cooling only units, do not mount the solenoid valve. While mounting the presostatic valve, the performance of the flow switch on the compressor start-
up must be timed during 1 minute, to let de valve act.
