Installation
CAIR
fricostar
®
FläktGroup DC-2009-0019-GB 2018-01/R9 • Specifications are subject to alteration without notice
39
Notice!
These limit values are
only intended to provide
basic information
on water quality
and do not form any
basis for a guarantee.
6.3.1 Installing air-handling components for cooling/heating applications
Consider the counter flow principle when connecting coils. (air and water moving in
opposite directions in the coil)
•
Protect the fins in the coils to prevent damage.
•
Connect pipework by others to the chilled water inlet and outlet. The inlet and outlet
coil connections are marked with labels.
•
Insulate pipework on site.
For air-handling
components for cooling/
heating applications
consider the following:
•
Following installation insulate coil connections and pipework to prevent condensing
water.
9
Coil drip tray is made of stainless steel and collects forming condensate. The coil
drip tray is fitted with a drain connection to empty condensate.
•
Refer to the section on trap (see „Water drain trapping“ on page 44).
For units with outside-air
or mixed-air operation
consider the following:
Description
Icon
Values
Effects in case of dif-
ference
Hydrogen ion concentration
pH
7.5
−
9
< 7
> 9
Corrosion
Incrustation
Calcium and magnesium content
Hardness
(Ca/Mg)
4
−
8.5 ×
Δ
> 8.5
Incrustation
Chlorine ions
Cl
–
< 50 ppm
Corrosion
Iron ions
Fe³
+
< 0.5 ppm
Corrosion
Magnesium ions
Mg²
+
< 0.05 ppm
Corrosion
Carbon dioxide
CO
2
< 10 ppm
Corrosion
Hydrogen sulphide
H
2
S
< 50 ppb
Corrosion
Oxygen
O
2
< 0.1 ppm
Corrosion
Chlorine
Cl
2
< 0.5 ppm
Corrosion
Ammonia
NH
3
< 0.5 ppm
Corrosion
Ratio carbons/sulphates
HCO
3
²
-
/SO
4
²
-
> 1
< 1
Corrosion
1/1.78 °D = 1 °Fr with 1 °Fr = 10 g CaCO
3
/m³
ppm = parts per million (mg/l)
ppb = parts per billion (
μ
g/l)
NOTICE!
Corrosion protection of installed unit components on the air side is ensured if the
chemical limit values for pool water as specified in VDI 2089 Sheet 2 "Water treat-
ment in swimming baths" and VDI 19643 are not exceeded.
EQUIPMENT DAMAGE!
Use a pipe wrench when attaching piping to coils to prevent damage.The connec-
tions to coils made by others on side must generally be tension-free. Do not apply
mechanical and static loads to the connection fittings.
EQUIPMENT DAMAGE!
Protect the heat exchanger in unit from ice and freeze-up at ambient temperatures
below the freezing point.
Use proper antifreeze agents in the water circuit.
