AERMEC FCLI 32 User manual

TECHNICAL MANUAL
FCLI 32
FCLI 42
FCLI 62
FCLI 34
FCLI 44
FCLI 64
CASSETTE-TYPE FAN COIL WITH INVERTER
IFCLITY 1006 - 5773010_00
FCLI

3
IFCLITY 1006 - 5773010_00
INDEX
Made with top quality materials in strict compliance with safety regulations, the Aermec FCLI
fan coil is easy to use and will have a long life.
Thanks to Aermec's FCLI range of inverter fan coils, brushless technology can now make
inroads in the field of chilled water air conditioning, bringing notable energy savings along
with the precise control of both air temperature and humidity in the air-conditioned rooms.
Keep the manuals in a dry place - to maintain their good con-
dition - for at least 10 years, for any future reference needs.
Carefully and thoroughly read all the information referred to in
this manual. Pay particular attention to the instructions for
use accompanied by the words “DANGER” or “WARNING”
because, if they are not complied with, the machine/property
can be damaged and/or people can be injured.
For any irregularities not foreseen by this manual, promptly
contact your local After Sales Service.
The device must be installed in such a way that maintenance
and/or repair operations are possible.
The device warranty does not in any case cover costs resulting
from the use of automatic ladders, scaffolding or any other
lifting system necessary for carrying out repairs under warranty.
AERMEC S.p.A. declines all liability for any damage due to
improper use of the machine, or the partial or superficial
reading of the information contained in this manual.
This manual contains the following number of pages: 32.
REMARKS
4
6
7
9
8
9
10
10
11
12
13
16
17
18
19
20
23
23
24
26
28
29
30
31
DECLARATION OF CONFORMITY
Transport • Safety symbols
Important information • Maintenance • Packaging
Description of the unit and versions
Main components • Description of components
System examples
Selection criteria
Operating limits
Technical data (2-pipe versions)
Technical data (4-pipe versions)
Cooling output
Heating capacity
Coil pressure drops
Correction factors in operation using glycol water
Sound power level • Sound pressure level
Accessories
Installation information
Alarm code
Unit installation
Installing and accessing the filter (for cleaning and maintenance)
Water connections
Condensate discharge connections
External air suction connection
Connection for air delivery in an adjacent room
Electrical wirings
Dimensions
Wiring diagrams

4IFCLITY 1006 - 5773010_00
FCLI
Bevilacqua, 01/06/2009 La Direzione Commerciale – Sales and Marketing Director
Luigi Zucchi
AERMEC S.p.A.
I-37040 Bevilacqua (VR) Italia – Via Roma, 996
Tel. [phone]
Telefax ([phone] – ([phone]
www.aermec.com - [email protected]
DICHIARAZIONE DI CONFORMITÀ
Noi, firmatari della presente, dichiariamo sotto la nostra esclusiva
responsabilità, che il prodotto:
VENTILCONVETTORE
serie FCLI
al quale questa dichiarazione si riferisce è conforme alle seguenti norme
armonizzate:
- CEI EN 60335-2-40
- CEI EN 55014-1
- CEI EN 55014-2
- CEI EN 61000-6-1
- CEI EN 61000-6-2
- CEI EN 61000-6-3
- CEI EN 61000-6-4
soddisfando così i requisiti essenziali delle seguenti direttive:
- Direttiva LVD 2006/95/CE
- Direttiva compatibilità elettromagnetica 2004/108/CE
FCLI CON ACCESSORI
E’ fatto divieto di mettere in servizio il prodotto dotato di accessori
non di fornitura Aermec.
CONFORMITY DECLARATION
We the undersigned declare, under our own exclusive responsibility,
that the product:
FAN COIL
FCLI series
to which this declaration refers, complies with the following standardised
regulations:
- EN 60335-2-40
- EN 55014-1
- EN 55014-2
- CEI EN 61000-6-1
- CEI EN 61000-6-2
- CEI EN 61000-6-3
- CEI EN 61000-6-4
thus meeting the essential requisites of the following directives:
- Directive LVD 2006/95/CE
- EMC Electromagnetic Compatibility Directive 2004/108/CE
FCLI WITH ACCESSORIES
It is not allowed to use the unit equipped with accessories not sup-
plied by Aermec.
CERTIFICAT DE CONFORMITÉ
Nous soussignés déclarons sous notre exclusive responsabilité que le
produit:
VENTILO-CONVECTEURS
série FCLI
auquel cette déclaration fait référence, est conforme aux normes
harmonisées suivantes:
- EN 60335-2-40
- EN 55014-1
- EN 55014-2
- CEI EN 61000-6-1
- CEI EN 61000-6-2
- CEI EN 61000-6-3
- CEI EN 61000-6-4
satisfaisant ainsi aux conditions essentielles des directives suivantes:
- Directive LVD 2006/95/CE
- Directive compatibilité électromagnétique 2004/108/CE
FCLI PLUS ACCESSOIRES
Il est interdit de faire fonctionner l'appareil avec des accessoires qui ne
sont pas fournis de Aermec.
KONFORMITÄTSERKLÄRUNG
Wir, die hier Unterzeichnenden, erklären auf unsere ausschließlich
Verantwortung, dass das Produkt:
GEBLÄSEKONVEKTOR
der Serie FCLI
auf das sich diese Erklärung bezieht, den folgenden harmonisierten
Normen entspricht:
- EN 60335-2-40
- EN 55014-1
- EN 55014-2
- CEI EN 61000-6-1
- CEI EN 61000-6-2
- CEI EN 61000-6-3
- CEI EN 61000-6-4
womit die grundlegenden Anforderungen folgender Richtlinien erfüllt
werden:
- Richtlinie LVD 2006/95/CE
- Richtlinie zur elektromagnetischen Verträglichkeit 2004/108/CE
FCLI + ZUBEHÖR
Falls das Gerät mit Zubehörteilen ausgerüstet wird, die nicht von
Aermec geliefert werden, ist dessen Inbetriebnahme solange untersagt.
DECLARACIÓN DE CONFORMIDAD
Los que suscriben la presente declaran bajo la propia y exclusiva
responsabilidad que el conjunto en objeto, definido como sigue:
FAN COIL
serie FCLI
al que esta declaración se refiere, está en conformidad a las siguientes
normas armonizadas:
- EN 60335-2-40
- EN 55014-1
- EN 55014-2
- CEI EN 61000-6-1
- CEI EN 61000-6-2
- CEI EN 61000-6-3
- CEI EN 61000-6-4
- EN 61000-6-3
al que esta declaración se refiere, está en conformidad a las siguientes
normas armonizadas:
- Directiva LVD 2006/95/CE
- Directiva compatibilidad electromagnétic 2004/108/CE
FCLI CON ACCESORIOS
Está prohibido poner en marcha el producto con accesorios
no suministrados por Aermec.

5
IFCLITY 1006 - 5773010_00
6
35Kg
NON bagnare • Do NOT wet
CRAINT l’humidité • Vor Nässe schützen
NO mojar
NON lasciare gli imballi sciolti durante il trasporto.
Do NOT leave loose packages during transport.
ATTACHER les emballages pendant le transport.
Die Verpackungen nicht ungesichert transportieren.
NO lleve las cajas sueltas durante el transporte.
Sovrapponibilità: controllare sull’imballo la sovrapponibilità per conoscere il nume-
ro di macchine impilabili.
Stacking: control the packing for the arrow position to know the number of machi-
nes that can be stacked.
Superposabilité: contrôler sur l’emballage la superposabilité pour connaître le nom-
bre de machines empilables.
Stapelbarkeit: Auf der Verpackung kontrollieren, wie viele Maschinen gestapelt wer-
den können.
Posibilidad de superposición: controlar en el embalaje la posibilidad de superposi-
ción para saber cuántas máquinas se pueden apilar.
NON calpestare • Do NOT trample
NE PAS marcher sur cet emballage • Nicht betreten
NO pisar
NON trasportare la macchina da soli se il suo peso supera i 35 Kg.
DO NOT handle the machine alone if its weight is over 35 Kg.
NE PAS transporter tout seul l’appareil si son poids dépasse 35 Kg.
Das Gerät NICHT alleine tragen, wenn sein Gewicht 35 Kg überschreitet.
NO maneje los equipos en solitario si pesan más de 35 kg.
Pericolo: Pericolo: Pericolo!!!
Tensione Organi in movimento
Danger: Danger: Danger!!!
Power supply Movings parts
Danger: Danger: Danger!!!
Tension Organes en mouvement
Gefahr ! Gefahr ! Gefahr!!!
Spannung Rotierende Teile
Peligro: Peligro: Peligro!!!
Tensión Elementos en movimiento
TRASPORTO • CARRIAGE • TRANSPORT • TRANSPORT • TRANSPORTE
SIMBOLI DI SICUREZZA • SAFETY SYMBOL • SIMBOLES DE SECURITE
SICHERHEITSSYMBOLE • SÍMBOLOS DE SEGURIDAD

6IFCLITY 1006 - 5773010_00
The fan coils are shipped in stand-
ard packaging, which consists of
expanded polystyrene foam and
cardboard shells.
PACKAGING
WARNING: the fan coil is connected
to the power supply and a water
circuit. Any operation by persons
who do not possess the required
technical skills can lead to personal
injury to the operator or damage to
the unit and surrounding objects.
POWER THE FAN COIL ONLY WITH
230V, SINGLE-PHASE VOLTAGE
Any other type of power supply could
permanently damage the fan coil.
DO NOT USE THE FAN COIL
IMPROPERLY
Do not use the fan coil for animal hus-
bandry applications (e.g. incubation).
AIR THE ROOM
Periodically air the room in which
the fan coil has been installed. This
is particularly important if the room
is occupied by many people, or if
gas appliances or sources of odours
are present.
ADJUST TEMPERATURE ADEQUATELY
The room temperature should be
adjusted in order to provide maxi-
mum comfort to the people in the
room, especially if they are elderly,
children or sick people; avoid differ-
ences over 7°C between the outdoor
temperature and the temperature
inside the room in summer.
In summer, a temperature that is too
low causes higher electrical con-
sumption.
CORRECT AIR JET AIMING
ADJUSTMENT
Air coming out from the fan coil must
not reach people directly; in fact,
even if the air is warmer than the
room temperature, it could cause
a cold sensation and result in dis-
comfort.
DO NOT USE EXCESSIVELY HOT
WATER
Clean the fan coil with a soft cloth
or sponge soaked in water not over
40°C. Do not use chemical products
or solvents to clean any part of the
fan coil. Do not spray water on the
outer or inner surfaces of the fan coil
(it might cause short circuits).
CLEAN THE FILTER FREQUENTLY
Cleaning the filter frequently guaran-
tees enhanced operating efficiency.
Check whether the filter is very dirty:
in this case, clean it more often.
Clean frequently; remove the accu-
mulated dust with a vacuum cleaner.
Once the filter is clean, refit it to
the fan coil following the removal
instructions but in reverse order.
SUPPLEMENTARY CLEANING
The fact that the blades of examinable
shrouds can be removed (operation
done only by adequately skilled
technicians) ensures a thorough
cleaning of the internal components,
which is particularly important when
installing the unit in crowded areas
or venues requiring high hygiene
standards.
DURING OPERATION
Always leave the filter fitted on the
fan coil during operation (otherwise
dust in the air could soil the coil
surface area).
WHAT IS NORMAL
In cooling mode, water vapour may
be present in the air delivery of the
fan coil.
In the heating operation, a slight hiss
might be heard close to the fan coil.
Sometimes the fan coil might give
off unpleasant smells due to the
accumulation of substances present
in the air of the room (clean the filter
more often, especially if the room is
not ventilated regularly).
While the unit is functioning, there
could be noises and creaks inside
the device due to the various ther-
mal expansions of the elements
(plastic and metal), but this does
not indicate any malfunction and
does not damage the unit unless the
maximum input water temperature
is exceeded.
MALFUNCTIONS
In case of malfunction, cut off power
to the unit, then energise it again
and restart the device.
WARNING! Do not attempt to repair
the unit by yourself; this is highly
dangerous!
If the problem occurs again, call the
local After-Sales Service immediately.
This section is reserved for the After Sales
Service only. On the Inverter board there
are 2 LEDs (Alarm / Power) indicating
the operating status of the unit. The table
for decoding the messages is given in the
chapter on installation.
DO NOT TUG THE ELECTRIC CABLE
It is very dangerous to pull, tread on
or crush the electric power cable,
or fix it with nails or drawing pins.
A damaged power cable can cause
short circuits and injure people.
DO NOT OBSTRUCT THE AIR OUTLETS
BY PLACING OBJECTS INTO THEM
Do not put anything in the air outlet
slots.
This could injure people and damage
the fan.
WARNING
Do not let children or unskilled peo-
ple use the device without supervi-
sion. Remember also that the device
must not be used by children as a
plaything.
IMPORTANT INFORMATION AND MAINTENANCE

7
IFCLITY 1006 - 5773010_00
DESCRIPTION OF THE UNIT
AVAILABLE SIZES
The cassette-type fan coils of the FCLI range are available in two versions:
for 2-pipe systems
FCLI 32
FCLI 42
FCLI 62
for 4-pipe systems
FCLI 34
FCLI 44
FCLI 64
GLLI 10
Grille unit with intake and delivery filter, with manually
adjustable fins, colour RAL 9010. The accessory also
includes the electric box for the unit.
CONTROL PANEL
The FCLI unit requires an external control panel with
thermostat and ventilation speed control, with a 0-10V
output. For the selection, refer to the list of accessories.
COMPULSORY ACCESSORY
• Standard FCLI version, with standard
internal 3-way valve fitted with fast
connection actuator and visual position
signalling.
• FCLI_V2 version, with standard internal
2-way valve fitted with fast connection
actuator and visual position signalling,
suitable for systems with a variable water
flow rate.
• FCLI_VL version, without an internal
valve.
VERSIONS
The cassette fan coils are available in three
versions, to satisfy all system requirements.
The sizes, performance levels and outer
dimensions are the same as those for the
standard FCLI version.
In this manual, versions FCLI_VL and
FCLI_V2 will only be referred to when
there are differences compared with the
standard FCLI version; otherwise they
will simply be called FCLI.
Versions FCLI_VL and FCLI_V2 are
available upon request.
PURPOSE OF THE FCLI CASSETTE-TYPE MODULATING FAN COIL
The fan coil is a room air treatment terminal unit for both winter and summer operation.
The cassette modulating fan coils of the FCLI range with brushless inverter motor differ from traditional fan coils as they offer greater
climate and acoustic comfort, as well as energy savings.
- The set temperature is maintained with
the greatest precision: the continuous
modulation of the fan speed prevents
oscillations caused by changes in speed
or a series of on-off cycles.
- Excellent acoustic comfort: as there are
no sudden changes between the different
speeds, no sound variation is heard when
the unit passes from one speed to another,
or when it passes between off and on. The
type of motor, and the control used, also
allow a minimum rotation speed much
lower than that of traditional models (even
more than 50% lower), so not only is the
average noise level greatly reduced but
above all the impression of actual noise.
(For example, if a traditional fan coil alter-
nates minimum speed cycles and fan "off"
cycles in the bedroom, what we hear is
not the average noise but the noise made
when it is operating at minimum speed.)
- Energy savings: thanks to the use of the
brushless motor, allowing greater effi-
ciency even in normal operating condi-
tions. To make the comparison, we have
created a display stand which we'll use
during trade fairs and events; we've
installed two of our fan coils of the same
size, one with a traditional motor and the
other with a brushless motor. With the
same motor rpm (and therefore the same
air flow rate), the reduction in input power
for the fan coil with a brushless motor
exceeds 50%. The inverter is a system that
automatically reduces the rpm and input,
allowing the fan coil to operate in choked
conditions and thereby producing notable
savings on yearly management costs. The
more efficient distribution system helps to
improve the energy class of the building.
The electronic control of the rpm means
you can guarantee and control the pickup
phase, avoiding those input peaks that
are produced with asynchronous motors
and are typical of this phase. Of course,
these benefits increase in proportion to the
number of FCLI fan coils installed.
ADVANTAGES
Cassette-type fan coil with Inverter for
installation in suspended ceilings, can be
integrated in standard 600x600 panelling.
The FCLI cassette-type fan coil is a room
air treating unit. The FCLI concentrates
high technological and functional
characteristics that make it the ideal
climate control unit for all types of
room. The climatised air is distributed
throughout the room thanks to the
delivery fins facing in four directions.
FCLI generates heat if included in a
heating system with boiler or heat pump,
but may also be used in the summer as
an air conditioner if the heating system
has a water chiller.
The fan coils are designed for 2- and
4-pipe systems.
The unit is installed in a suspended ceiling
with the possibility to send conditioned
air to adjacent rooms and introduce
external air regardless of unit ventilation.
FCLI CASSETTE

8IFCLITY 1006 - 5773010_00
MAIN COMPONENTS
1 Grille with air filter (GLLI10)
2 Air delivery deflector (GLLI10)
3 Grille frame (GLLI10)
4 Tray
5 Inverter device
6 Base unit
7 Fastening brackets
8 Electrical box
9 Water connections
10 Air drain valve
11 Push-out, coupling for air delivery in
an adjacent room
12 Condensate drain
FCLI
GLLI 10
2
5
1 3
4
6
8
11 10 9
7
12
BASE
The unit is characterised by a reinforced,
integral metal structure with insulation
in expanded polystyrene obtained from
injection moulding for purposes of noise
reduction and air routing. The load-bear-
ing base is in galvanised sheet steel and
is varnished with polyester powders. The
following are fixed to the base: fixing
brackets, coils, motor with fan, conden-
sate discharge pump, attachment plate,
control board unit and condensate drip
tray. By means of the flanges, it allows
the channels (for renewing environmen-
tal air and/or delivery to an adjacent
room) to be joined to the sides.
FASTENING BRACKETS
Galvanised steel brackets for attaching the
unit to the ceiling.
TRAY
Tray closing off the unit. Made of injec-
tion co-moulded polystyrene to avoid
thermal dispersion and the formation
of condensate, it conveys conditioned
air towards the louvres and from the
condensate drip tray.
The air suction conveyor is equipped with
a protective grille that impedes access to
the moving fan.
THERMAL EXCHANGE COIL
The coils used have copper pipes and cor-
rugated or turbulent aluminium louvres.
They are designed to offer the maximum
heat exchange surface. All batteries are
provided with air bleed pipes and water
drain valves, located respectively on the
highest and lowest point of the battery
circulation.
INTERNAL THREE-WAY VALVE
Fitted as standard in standard versions.
Internal three-way "all-or-nothing" type
valve with fast connection actuator and
visual position signalling, fitted as stand-
ard on the hot/cold coil.
Powered at 230V ~ 50Hz.
FAN UNIT
The fan unit, with the latest axial-centrif-
ugal fan designed to obtain low-sound
emissions, is dynamically and statically
balanced.
The fan unit can be easily accessed for
cleaning and maintenance.
BRUSHLESS ELECTRIC MOTOR WITH
INVERTER CONTROL
The "brushless with Hall probes" electric
motor, and the control system used in
AERMEC's FCXI fan coils, were created
from the fusion of the most sophisticated
technologies in the fields of mechanics
and electronics, entirely developed
within the industrial group.
This is a permanent magnets motor with
low starting current and easy speed
adjustment.
It is not affected by electromagnetic dis-
turbance.
The fact that it has no brushes means less
friction and reduced wear and tear.
With the special inverter device, it is pos-
sible to control the speed and torque of
the rotor continuously, just by means of
the stator currents.
The electric motor is cushioned with
elastic supports, and the steel shaft is
mounted on bearings and resists salty
fog in accordance with ASTM B117/64.
The "brushless with Hall probes" electric
motor used in AERMEC's FCXI modu-
lating fan coils offers huge advantages
compared with the traditional alternating
current motors or hybrid and inverter
motors (without Hall probes) normally
used on other modulating fan coils:
- Reduced wear and tear
- The possibility to regulate the rotation
speed in a precise, continuous manner
(0-100%)
- Higher energy yields
- Longer life and greater reliability
- Low magnetic noise level
- Continuous control of the rotor position,
therefore greater efficiency and guaran-
teed/controlled starting current
- Guaranteed minimum speed of 90 rpm
(for thermodynamic reasons, this limit
has been taken to 200 rpm)
CONDENSATE DISCHARGE DEVICE
The condensate discharge device disposes
of the condensate that is produced by
the unit and deposited in the polystyrene
basin. The device consists of a control
board, a non-return valve, a 3-level
float and a pump with a maximum
head of 800mm. The unit can be easily
connected to the condensate discharge
system by means of a plastic connector
with an external Ø of 16mm.
ALARM: when the level of condensate
in the tray reaches the prefixed limit,
the alarm will stop the flow of water
to the battery, allowing only the fan to
function.

9
IFCLITY 1006 - 5773010_00
WATER CONNECTIONS
The attachment plate groups together the
water connections and the vent of the
coil's primary circuit for 2-pipe and 4-pipe
systems. The plates contain raised symbols
that identify the input (IN) and output
(OUT) water connections for the water.
GLLI10 (compulsory accessory)
Suction and delivery grille unit
The grille is part of the GLLI10 range grille
unit (obligatory accessory).
The form and opening of the suction lou-
vres were developed in order to have
the best possible distribution of the air,
both when functioning in winter as well
as in summer.
Suction takes place through the central
grille, and delivery through the perimeter
slots with their manually adjustable fins.
The grille is made of plastic, colour RAL
9010, and contains the air filter that can
be easily removed for cleaning. GLLI10
needs to be interfaced with an external
control panel (not included) with ther-
mostat and ventilation speed control,
with a 0-10V output.
FILTERING SECTION
Mechanical air filter with ABS frame,
colour RAL9010.
Filter in filtering class G1, self-extinguishing
class V0 (UL94).
Easily removable and made from regen-
erable materials. May be cleaned by
washing.
CONTROL PANEL
Use a control panel with thermostat and
ventilation speed control, with 0-10V
output.
SA SA
SA SA
SW
SW
VHL
VHL
VHL1
SA SA
SW
SW
V2
V2
VHL2
SYSTEM EXAMPLES
Key: SA Ambient probe
SW Water probe
VHL 3-way valve (Heat/Cool)
V2 2-way valve (Heat/Cool)
VHL1 3-way valve (Heat)
VHL2 2-way valve (Heat)
FCLI (Standard)
4-pipe system2-pipe system
FCLI (V2)
4-pipe system2-pipe system
FCLI (VL) without valves
4-pipe system2-pipe system

10 IFCLITY 1006 - 5773010_00
OPERATING LIMITS
Performance values refer to the following conditions:
- at the maximum motor speed
- the total input power is determined by adding the input power
for the unit and the input power for the accessories connected
and declared in the corresponding manuals
FCLI 32 34 42 44 62 64
Maximum water inlet temperature °C 80°
Recommended maximum inlet water temperature °C 65°
Maximum operating pressure bar 8°
Minimum water flow rate (heating) l/h 100 50 100 50 150 50
Maximum water flow rate (heating) l/h 750 400 750 400 1050 400
Minimum water flow rate (cooling) l/h 100 100 100 100 150 150
Maximum water flow rate (cooling) l/h 750 750 750 750 1050 1050
Room temperature limits (Ta) °C 0° < Ta < 40°
Relative humidity limits in the room (R.H.) R.H. < 85%
Power supply 230V ( ±10% ) ~ 50 Hz
HOW TO CHOOSE
The main technical data of the FCLI units
are summarised in tables or charts.
The table shows the sensible and
total cooling capacities at maximum
speed, on the basis of the inlet water
temperature, its thermal head, and the
temperature of the air with dry bulb
and wet bulb respectively for sensible
capacity and total capacity. Performance
levels at average and minimum speeds
are obtained by multiplying the table
values by the correction factors shown.
The water side pressure drops are shown
in the charts.
The correction factors when the unit
operates with glycol water for cooling
and heating function modes are shown
in the graphs in percentages of glycol of
10%, 20% and 35%.
The heating capacity (on the basis of the
water flow rate and the temperature
difference between inlet water and inlet
air) is shown in the chart, and refers to
the maximum speed. Performance levels
at average and minimum speeds are
obtained by multiplying the chart values
at maximum speed by the correction
factors shown.
The tables show the pressure level and
sound power of the fan coils at various
speeds.
There is a wide range of accessories for the
FCLI fan coils, but in certain cases some
of them cannot be used simultaneously:
check the accessories are compatible
with the fan coil chosen. The manual
contains a description of each accessory,
plus a drawing and its compatibility.
The installation information is included in
the manuals supplied together with each
fan coil or its accessory. This manual is
limited to provide general information
in order to obtain a correct installation;
it also contains drawings with fan coil
dimensions and the wiring diagrams
with the connections to control panels.
Minimum average water temperature
If the fan coil is working in continuous
cooling mode in an environment where
the relative humidity is high, condensate
might form on the air delivery and on the
outside of the device. This condensate
might be deposited on any objects
underneath and on the floor.
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, that
depend on the thermo-hygrometric
conditions of the air in the room.
These limits refer to unit operating with
fan at minimum speed.
Water temperature
In order to prevent air stratification in
the room, and therefore to achieve
improved mixing, it is advisable not
to supply the fan coil with water at a
temperature over 65°C.
The use of water at high temperatures
could cause squeaking, due to the
different thermal expansions of the
elements (plastic and metal). This
does not however cause damage to
the unit as long as the maximum inlet
water temperature is not exceeded
(see table).
MINIMUM AVERAGE WATER TEMPERATURE [°C] Ambient air temperature with dry bulb
21 23 25 27 29 31
Ambient air temperature
with wet bulb
15 333333
17 333333
19 333333
21 654333
23 -87655