9
If the fan coil runs continuously in cooling
mode in an environment with high relative
humidity, condensate may form on the air
flow outside the appliance. This conden-
sate 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 tem-
perature must not drop below the limits
indicated in the table. These limits depend
on the temperature and humidity condi-
tions 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 rec-
ommend installing the 3-way valve (acces-
sory).
42. OPERATING LIMITS
VED_I
430US
440US
530US
540US
432US
441US
532US
541US
Maximum water inlet temperature
°C -°F
80 - 176
Maximum water inlet temperature recommended
°C -°F
65 - 149
Maximum operating pressure
bar - PSI
8 - 72.52
Minimum water flow rate (Main coil)
l/h
gpm
300
1.1
300
1.1
300
1.1
300
1.1
300
1.1
300
1.1
300
1.1
300
1.1
Maximum water flow rate (Main coil)
l/h
gpm
3000
10.998
3000
10.998
3000
10.998
3000
10.998
3000
10.998
3000
10.998
3000
10.998
3000
10.998
Minimum water flow rate (Heating Only Coil)
l/h
gpm
-
-
-
-
200
0.733
100
0.183
200
0.733
100
0.183
Maximum water flow rate (Heating Only Coil)
l/h gpm
-
-
-
-
2000
7.332
1500
5.499
2000
7.332
1500
5.499
Environment temperature limits (Ta)
°C
0° < Ta < 40°
Relative humidity limits in the environment (R.H.)
R.H. < 85%
MINIMUM AVERAGE WATER TEMPERATURE [°C] [°F]
Dry-bulb temperature of room temperature
21 °C / 69.8 °F 23 °C / 73.4 °F
25 °C / 77 °F
27 °C / 80.6 °F 29 °C / 84.2 °F 31 °C / 87.8 °F
WET-BULB TEMPERATURE
OF ROOM TEMPERATURE
15 °C / 59 °F
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
17 °C / 62.6 °F
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
19 °C / 66.2 °F
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
3 / 37.4
21 °C / 69.8 °F
6 / 42.8
5 / 41
4 / 39.2
3 / 37.4
3 / 37.4
3 / 37.4
23 °C / 73.4 °F
-
8 / 46.4
7 / 44.6
6 / 42.8
5 / 41
5 / 41
The earth leakage current of several devic-
es placed under the same circuit breaker is
summed, therefore we recommend paying
attention to the calibration value of the
circuit breaker and, if necessary, consider
splitting the installation in more circuits,
each of which protected by its own circuit
breaker.
VED_I
630US
640US
730US
740US
632US
641US
732US
741US
Maximum water inlet temperature
°C -°F
80 - 176
Maximum water inlet temperature recommended
°C -°F
65 - 149
Maximum operating pressure
bar
(800000 Pa)
Minimum water flow rate (Main coil)
l/h
gpm
300
1.320
300
1.320
300
1.320
300
1.320
300
1.320
300
1.320
300
1.320
300
1.320
Maximum water flow rate (Main coil)
l/h
gpm
4500
16.498
4500
16.498
4500
16.498
4500
16.498
4500
16.498
4500
16.498
4500
16.498
4500
16.498
Minimum water flow rate (Heating Only Coil)
l/h
gpm
-
-
-
-
300
1.320
300
1.320
300
1.320
300
1.320
Maximum water flow rate (Heating Only Coil)
l/h
gpm
-
-
-
-
3000
10.998
3000
10.998
2500
9.165
3000
10.998
Environment temperature limits (Ta)
°C -°F
0° < Ta < 40°
Relative humidity limits in the environment (R.H.)
R.H. < 85%
In order to prevent air stratification in the
environment and thus have a better mix-
ture, the fan coil should not be supplied
with water that is hotter than 65 °C/149°F.
Using water at a very high temperature
can cause creaking due to the heat expan-
sion of the elements (plastic and metal),
however, this does not cause damage to
the unit unless the maximum operating
temperature is exceeded.
WATER TEMPERATURE
MINIMUM AVERAGE WATER TEMPERATURE