FanCoilUnitOne-WayCassetteType
3
DANGER OF OVERHEAD LOADS!
Wear a helmet and safety boots to prevent injury from falling components, especially when fitting
the unit to the ceiling. Ceiling installations should always be performed by two people.
PERSONAL INJURY!
Always wear protective gloves when moving or fitting the unit to avoid injury from sharp edges.
1.2 Important notes
The fan coil units are end units of chilled/hot water air conditioning system featuring high
profession and high technological requirement, therefore, the unit shall be installed, operated and
maintained only by qualified, specially trained and authorized staff.
1.2.1 Proper use
One-Way Cassette fan coil units are exclusively designed for heating, filtering and cooling
purposes. Chilled water/Hot water may be used as the medium. The following limit values
apply to the chilled/hot water for operating Cu/Al heat exchangers:
Unit Value
pH value (at 20 °C) 7,5 – 9
Conductivity (at 20 °C) μS/cm < 700
Oxygen content O2mg/l < 0,1
Total hardness °dH 1 – 15
Dissolved sulphur Snot detectable
Sodium Na+mg/l < 100
Iron Fe2+, Fe3+ mg/l < 0,1
Manganese Mn2+ mg/l < 0,05
Ammonium content NH4+mg/l < 0,1
Chloride Cl-mg/l < 100
Sulphate SO42- mg/l < 50
Nitrite NO2-mg/l < 50
Nitrate NO3-mg/l < 50
DAMAGE TO THE UNIT!
On open systems (e.g. when using well water observe the limit values stated in above table), the
used water should additionally be cleansed of suspended matter using a filter which should be
located at the inlet. Otherwise there is a risk of erosion by suspended matter.
You also have to ensure that the unit is protected from dust and other substances that can cause
acidic or alkaline reaction when combined with water (aluminum corrosion).
–The One-Way Cassette fan coil units may only be used indoors.
–The One-Way Cassette fan coil units can also be fitted into an intermediate ceiling.
The unit is considered to be used in a proper manner if it is applied for other purposes or a
purpose that is not covered by the scope of the given operation manual. The manufacturer or
