32
English
MINIMUM AVERAGE WATER TEMPERATURE
21 23 25 27 29 31
15 3 3 3 3 3 3
17 3 3 3 3 3 3
19 3 3 3 3 3 3
21 6 5 4 3 3 3
23 - 8 7 6 5 5
.................................. 70 °C
......................... 13 bar (1.3 MPa)
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
below, determined by the ambient conditions. These limits refer
to unit operation with fan at minimum speed.
Minimum flow rate [l/h] 100 100 150 250
Maximum flow rate [l/h] 750 750 1100 2000
maximum and minimum room temperature limits, Ta, are
respected: 0°C < Ta < 40°C ; R.H. < 85%.
Connect to a 230 V ~
and ensure it remains within the limit of ±10% with respect to
the nominal value.
OPERATING ENVIRONMENT
of ‘urban’, non-marine atmosphere with non-corrosive and non-dusty
which the unit must operate, shall 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
serious and irreparable damage from corrosi
WARNINGS FOR THE QUALITY OF THE WATER
CIRCULATING IN THE COILS
iron bacteria and micro-organisms that can produce H2S or chemically reduce
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 l < mmoll/l < 1,5
Chlorides [CL
-
] < 10 mg/litre
Sulphates [SO
4
2-
] < 30 mg/litre
Nitrates [NO
3
-
] = 0 mg/litre
Dissolved iron < 0,5 mg/litre
Dissolved oxygen 4 < [O
2
] < 9 mg/litre
Carbon dioxide [CO
2
] < 30 mg/litre
pH 6,9 < pH < 8
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