18
IULIPCLJ 1201 - 6976445_00
DURING OPERATION
Always leave the filter fitted on the fan coil during operation
(otherwise dust in the air could soil the coil surface area).
IT IS NORMAL
In cooling mode, water vapour may be present in the air deliv-
ery of the fan coil.
In the heating function it might be possible to hear a slight
hiss around the fan coil. Sometimes the fan coil might give off
unpleasant smells due to the accumulation of substances in the
air of the environment (especially if the room is not ventilated
regularly, clean the filter more often).
OPERATING LIMITS
Maximum water inlet temperature:
80°C
Maximum operating pressure:
8 bar
Minimum average water temperature:
To avoid condensate on the external structure of the device
while the fan is functioning, the average temperature of the
water must not be lower than the limits shown in the table
below, which depend on the thermo-hygrometric conditions of
the air in the room. These limits refer to unit operating with fan
at minimum speed. In the event of prolonged fan inactivity and
with cold water passing through the coil, condensate may form
on the external case of the unit.
As a result, we recommend
including the 3-way valve accessory.
MINIMUM AVERAGE WATER
TEMPERATURE Temperature of the air in
the room with dry bulb °C
Temperature of the air in the room with dry bulb °C
21
23
25
27
29
31
Temperature of the air in the
room with wet bulb °C
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
OPERATING ENVIRONMENT ALREADY TRANSLATED
OPERATING ENVIRONMENT
The units are designed for installa
Ɵ
on in closed environments in condi
Ɵ
ons
of ‘urban’, non-marine atmosphere with non-corrosive and non-dusty
characteris
Ɵ
cs.
Under no circumstances the following concentra
Ɵ
ons of pollutants in the
air, in 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
The unit should not be installed in loca
Ɵ
ons characterized by the presence
of
Ň
ammable gases or acidic or alkaline substances.
Otherwise the coils and the internal components of the equipment could
su
ī
er serious and irreparable damage from corrosion.
WARNINGS FOR THE QUALITY OF THE WATER CIRCULATING
IN THE COILS
It is recommended to perform an analysis of the water circula
Ɵ
ng in the coil
focusing on the research of the possible presence of bacteria (detec
Ɵ
on of
iron bacteria and micro-organisms that can produce H2S or chemically reduce
sulphates) and on the chemical composi
Ɵ
on 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.
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
Resis
Ɵ
vity
20 Ohm·m < Resis
Ɵ
vity<
50 Ohm·m
pH
6,9 < pH < 8