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OPERATIONAL LIMITS
Maximum inlet water temperature .................................. 70 °C
Maximum operating pressure .........................13 bar (1.3 MPa)
The installation site must be chosen in such a way that the
maximum and minimum room temperature limits, Ta, are
respected: 0°C < Ta < 40°C ; R.H. < 85%.
Flow rate limits:
MODEL
Minimum flow rate
Maximum flow rate
Minimum average water temperature
To prevent the formation of condensation on the exterior of the
unit while the fan coil unit is operating, the average water tem-
perature should not drop beneath the limits shown in the table
MINIMUM AVERAGE WATER TEMPERATURE
Wet bulb temperature
of the air in the room °C
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 the following concentrations of pollutants in the air, in
which the unit must operate, shall be exceeded:
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 should not be installed in locations characterized 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 corrosi
32
Connect to a 230 V
and ensure it remains within the limit of ±10% with respect to
the nominal value.
FCW
22
[l/h]
100
[l/h]
750
below, determined by the ambient conditions. These limits refer
to unit operation with fan at minimum speed.
21
15
3
17
3
19
3
21
6
23
-
WARNINGS FOR THE QUALITY OF THE WATER
CIRCULATING IN THE COILS
It is recommended 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.
~
50 Hz power supply and earth connection,
32
100
750
Dry bulb temperature of the air in the room °C
23
25
3
3
3
3
3
3
5
4
8
7
Total hardness in mmol/l
l < mmoll/l < 1,5
-
Chlorides [CL
]
< 10 mg/litre
2-
Sulphates [SO
]
< 30 mg/litre
4
-
Nitrates [NO
]
= 0 mg/litre
3
Dissolved iron
< 0,5 mg/litre
Dissolved oxygen
4 < [O
Carbon dioxide [CO
]
< 30 mg/litre
2
Resistivity
20 Ohm∙m < Resistivity< 50 Ohm∙m
pH
6,9 < pH < 8
42
52
150
250
1100
2000
27
29
3
3
3
3
3
3
3
3
6
5
] < 9 mg/litre
2
31
3
3
3
3
5
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