21
OPERATING LIMITS
VES
030
040
130
140
230
240
330
340
Maximum water inlet temperature
°C
80
Maximum recommended water inlet temperature
°C
65
Maximum operating pressure
bar
(800 kPa)
Minimum water flow rate (Main coil)
l/h
150
150
150
150
150
150
300
400
Maximum water flow rate (Main coil)
l/h
1500
1500
1500
1500
1500
1500
3000
4000
Minimum water flow rate (Heating only coil)
l/h
50
-
50
-
50
-
100
-
Maximum water flow rate (Heating only coil)
l/h
500
-
500
-
500
-
1000
-
Ambient temperature limits (Ta)
°C
0° < Ta < 40°
Ambient relative humidity limits (RH)
U.R. < 85%
Power supply
230V ( ±10% ) ~ 50Hz
Protective rating
IP
20
Earth leakage current from several units
supplied from the same residual current
device are cumulative and consideration
should be given to the rating of this
residual current device. It may be necessary
to separate the installation into several
circuits with their own residual current
device.
Minimum average water temperature
If the fan coil unit operates continuously
in cooling mode in a room with high
relative humidity, condensate might
form on the air discharge and unit
casing. This condensate might be
deposited on the floor and on any
o b j e c t s u n d e r n e a t h . To p r e v e n t
the formation of condensation on
the exterior of the unit while the
fan is operating, the average water
temperature should not drop below
the operating limits shown in the table
below, determined by the room ambient
conditions.
These limits refer to unit operation with
fan at minimum speed.
In the case of prolonged periods with
the fan switched off and cold water
passing through the coil the formation
of condensate on the unit casing is
possible. In this case the installation
o f t h e 3 w ay v a l ve a cce s s o r y i s
recommended.
Water temperature
In order to avoid air stratification and
therefore achieve better mixing it is advised
not supply the fan coil unit with water
hotter than 65°C.
The use of very hot water could cause
creaking due to the thermal expansion
of the different components (plastics and
metals). This does not cause damage to
the unit if the maximum operating
temperature is not exceeded.
MINIMUM AVERAGE WATER TEMPERATURE [°C]
Ambient dry bulb temperature
21
23
25
27
29
31
Ambient wet bulb temperature
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
