Operating Environment; System Examples; Installation - AERMEC VED I Série Manuel Technique

OPERATING ENVIRONMENT

The units are designed for installation in closed
environments in 'urban', non-marine atmos-
phere conditions that are not corrosive or dusty.
The following concentrations of the air polluting
factors where the unit must operate must not
be exceeded under any circumstances:
SO < 0.02 ppm
2
H S < 0.02 ppm
2
NO,NO < 1 ppm
2
NH < 6 ppm
3
N O < 0.25 ppm
2
The unit must not be installed in areas char-
acterised by the presence of flammable gases
or acidic or alkaline substances. Otherwise the
coils and the internal components of the equip-
ment might undergo serious and permanent
damage in terms of corrosion.

SYSTEM EXAMPLES

VERTICAL INSTALLATION
2-PIPE SYSTEM WITH WATER PROBE
SA C/F SW SA C/F
SA C/F SW SA C/F
4-PIPE SYSTEM WITH WATER PROBE
SW
SW
SA SA
SA SA
KEY:
SW Water temperature probe
VC/F Valve (Heating / Cooling)
VC
Valve (Heating)
Warnings for the quality of water circulating in
the coils. We recommend performing an analy-
sis of the water circulating in the coil focused
on searching for any bacteria (detection of iron
bacteria and micro-organisms that can produce
H2S or chemically reduce sulphates) and the
chemical composition of the water itself to pre-
vent corrosion and encrustations inside the
pipes.
The water circuit must have all the components,
such as for instance relief and drainage systems,
shut-off valves and that the results of the analy-
sis performed suggest are necessary to ensure
suitable water treatment. The water treatment
system must ensure compliance with the follow-
ing chemical and physical parameters:
Total hardness in
mmol/l
Chlorides [CL ]
-
Sulphates [SO ]
2-
4
Nitrates [NO ]
-
3
Dissolved iron
Dissolved oxygen
Carbon dioxide [CO
Resistivity
pH
HORIZONTAL INSTALLATION
VC/F SW C/F SW VC/F
VC/F SW C/F SW VC/F
SW
VC VC/F SW SA C C/F VC VC/F
VC VC/F SW SA C C/F VC
l < mmoll/l < 1.5
< 10 mg/litre
< 30 mg/litre
= 0 mg/litre
< 0.5 mg/litre
4 < [O ] < 9 mg/litre
2
]< 30 mg/litre
2
20 Ohm∙m < Resistivity < 50 Ohm∙m
6.9 < pH < 8
HORIZONTAL INSTALLATION
2-PIPE SYSTEM WITHOUT WATER PROBE
SA
C/F
SA
C/F
4-PIPE SYSTEM WITHOUT WATER PROBE
SW
SA VC VC/F
SA VC VC/F
VC/F
SA Room temperature probe
H/C
Coil (Heating / Cooling)
C Coil (Heating)
SA VC/F SA
C/F C/F
SA VC/F SA
C/F C/F
SA C C/F VC VC/F C C/F
SA C C/F VC VC/F C
IVEDITI 2102 - 4880986_00
VC/F
VC/F
VC VC/F
C/F VC VC/F
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