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20.
OPERATING LIMITS
Maximum water inlet temperature (Tw)
Maximum water inlet temperature recommended
(Tw)
Maximum operating pressure
Environment temperature limits (Ta)
Relative humidity limits in the environment (R.H.)
Electric power supply
Standard main coil • Cooling circuit for double-circuit coils
Standard coil
Minimum water flow rate (Qw)
Maximum water flow rate (Qw)
Heating only coil (BV accessory) • Heating circuit for double-circuit coils
FCX
Minimum water flow rate (Qw)
Maximum water flow rate (Qw)
Larger coil
Larger coil
Minimum water flow rate (Qw)
Maximum water flow rate (Qw)
Water temperature
In order to prevent air stratification in the envi-
ronment and thus, have better mixing, the fan coil
should not be supplied with water that is hotter
than 65 °C. Using water at a very high tempera-
Minimum average water temperature
If the fan coil runs continuously in cooling
mode in an environment with high relative
humidity, condensate may form on the air
flow. This condensate could drip onto the
floor and onto any underlying objects. To
prevent condensation phenomena on the
external structure of the appliance with the
fan running, the average water temperature
Wet-bulb temperature
of ambient air (Ta) [°C]
24
FCX
bar
FCX
BV
FCX
ture can cause creaking due to the heat expansion
of the elements (plastic and metal). However, this
does not cause damage to the unit unless the
maximum operating temperature is exceeded.
must not drop below the limits indicated in
the table. These limits depend on the tem-
perature and humidity conditions of the
room air. These limits refer to operation with
the fan running at minimum speed.
Condensation may form in the event the fan
is off for a prolonged period and cold water
flows in the coil; therefore, we recommend
17
22
32
36
24
34
°C
°C
°C
17
22
32
36
l/h
100
100
100
100
l/h
750
750
750
750
17
22
32
36
117
122
132
132
l/h
50
50
50
50
l/h
400
400
400
400
24
34
l/h
150
150
l/h
1100 1100
Dry-bulb temperature of ambient air (Ta) [°C]
21
23
15
3
3
17
3
3
19
3
3
21
6
5
23
-
8
MINIMUM AVERAGE WATER TEMPERATURE (Tw) [°C]
42
50
56
62
44
54
64
80
65
8
0 < Ta < 45
R.H. < 85%
230V ( ±10% ) ~ 50Hz
42
50
56
62
150
150
150
300
1100 1100 1100 2200 2200 2200
42
50
56
62
142
142
142
162
50
50
50
100
400
400
400
900
44
54
64
150
150
300
1100 1100
2200 2200
installing the 3-way valve (accessory).
25
27
29
3
3
3
3
3
3
3
3
3
4
3
3
7
6
5
IFCXBULJ 1412 - 6456062_01
FCX B-U-UA-UE
82
102
84
82
102
300
300
82
102
162
162
100
100
900
900
84
300
31
3
3
3
3
5
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