27
EN
Correct installation is essential, and also includes
insulation of the air ducts with insulating material to
prevent condensation at the fluid pipe connections.
Heat transfer fluid
• The heat transfer fluid is either water or a water and
glycol solution.
• The fluid temperature must be between 5 and 80°C
and must never exceed these limits.
• Maximum operating pressure: 1000 kPa (10 bars).
• Use always two spanners when tightening the coil to
the piping.
• Always fit a water flow on-off valve.
WARNING!
• In summer and during extended periods with the
fan off, to avoid condensation on the outside of the
appliance, the coil fluid supply must be shut off.
• If the appliance is equipped with a valve, connect
the connection pipes to this valve.
• If the appliance is used for cooling, to prevent drip-
ping from condensation, insulate the pipes and the
valve.
Condensate drain hose
THE CONDENSATE DRAIN SHOULD BE FITTED
WITH A DRAIN TRAP. INSTALL THE CONDENSATE
DRAIN HOSE WITH A SLOPE OF AT LEAST 2 cm/
metre.
Water parameters
Maximum allowable values for the water used inside a
closed-loop cooling or heating circuit.
In open circuits (for example, when using well water),
the water used must be cleaned of any suspended
materials using a filter on the inlet (otherwise, there
is the risk of erosion due to suspended particles). It
is also necessary to ensure that the unit is protected
against dust and other substances that cause an acid
or alkaline reaction when combined with water (corro-
sion of the aluminium).
WATER CONNECTION
Parameter
Unit
Available
on
pH value (at 20°C)
-
-
8 - 9
Conductivity (at 20°C)
-
μS/cm
< 700
Oxygen content
O2
mg/l
< 0.1
Total hardness
-
°dH
1 - 15
Sulphur ions
S
-
not
measurable
Sodium ions
Na+
mg/l
< 100
Iron ions
Fe2+, Fe3+ mg/l
< 0.1
Manganese ions
Mn2+
mg/l
< 0.05
Ammonia ions
NH4+
mg/l
< 0.1
Chlorine ions
Cl-
mg/l
< 100
Sulphate ions
SO42-
mg/l
< 50
Nitrite ions
NO2-
mg/l
< 50
Nitrite ions
NO3-
mg/l
< 50
Содержание a-CXW 1102
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