AERMEC FCWI 232V - Operating Environment and Limits; Environmental Conditions and Pollutants; Water Quality for Coils; Operating Limits and Flow Rates

29
MINIMUM AVERAGE WATER TEMPERATURE
Temperature of the air in the room with dry bulb °C
21 23 25 27 29 31
15 3 3 3 3 3 3
Temperature of the wet bulb 17 3 3 3 3 3 3
of the air in the room °C 19 3 3 3 3 3 3
21 6 5 4 3 3 3
23 - 8 7 6 5 5
Minimum average water temperature
To avoid condensate on the external structure of the device while the fan is functioning, the average temperature of the water must not be
lower than the limits shown in the table below, that depend on the thermo-hygrometric conditions of the air in the room.
These limits refer to unit operating with fan at minimum speed.
OPERATING LIMITS
Maximum water inlet temperature ........................................70°C Maximum operating pressure ...........................13 bar (1.3 MPa)
The assembly site must be chosen in such a way that the maximum
and minimum ambient temperature limits (Ta) are respected 0°C < Ta
<40°C; R.H. < 85%.
Power with a current of 220-240V ~ 50/60 Hz and an earth
connection. In any case, the line voltage must remain within the
tolerance range of ±10% in relation to the nominal value.
OPERATING ENVIRONMENT
The units are designed for installation in closed environments
in conditions of 'urban', non-marine atmosphere with
non-corrosive and non-dusty characteristics. Under no
circumstances should the following concentrations of
pollutants in the air where the unit operates be exceeded:
SO
2
< 0.02 ppm
H
2
S < 0.02 ppm
NO,NO
2
< 1 ppm
NH
3
< 6 ppm
N
2
O < 0.25 ppm
The unit should not be installed in places characterised by the
presence of flammable gases or acidic or alkaline substances.
Otherwise the coils and the internal components of the
equipment could suffer serious and irreparable damage from
corrosion.
WARNINGS FOR THE QUALITY OF THE
WATER CIRCULATING IN THE COILS
You are advised to perform an analysis of the water circulating
in the coil focusing on the research of the possible presence of
bacteria (detection of iron bacteria and micro-organisms that
can produce H2S or chemically reduce sulphates) and on the
chemical composition of the water, to prevent corrosion and
fouling inside the tubes.
The water circuit must be supplied and replenished with treated
water that does not exceed the threshold levels indicated
below.
Total hardness in mmol/L 1 < mmol/L < 1.5
Chlorides [CL
-
] < 10 mg/L
Sulphates [SO
4
2-
] < 30 mg/L
Nitrates [NO
3
-
] = 0 mg/L
Dissolved iron < 0,5 mg/L
Dissolved oxygen 4 < [O
2
] < 9 mg/L
Carbon
dioxide [CO
2
]
< 30 mg/L
Resistivity
20 Ohmm < Resistivity < 50
Ohmm
pH 6.9 < pH < 8
Flow rate limits:
MOD. FCWI 23 33 43 53
Minimum flow rate [L/h] 100 100 150 250
Maximum flow rate [L/h] 750 750 1100 2000