Operation - AERMEC Omnia HL N Manuel D'utilisation Et D'installation

OPERATION

The OMNIA HL_N fan coil concentrates
hi-tech and highly functional featur-
esthat make it the ideal means of cli-
mate control in every room.
OMNIA fan coils are designed for indoor
use.
The supply of climate-controlled air is
immediate and distributed throughout
the room. OMNIA HL_N generates heat
if inserted in a heating system withboil-
er or heat pump, but it can also be used
in summer as an air conditioner if the
heating system has a water chiller.
The quality of the treated air is guaran-
teed by a special, electrostatically pre-
charged filter which absorbs and holds
back the suspended dust particles. With
the fan coil switched off, the closed fin
prevents any dust or foreign bodies
from entering.
The removable drip tray and fan volute
ensure thorough cleaning of the unit
Description of the HL_N fan coil functions
• Type of system
The OMNIA HL_N fan coils are designed
for 2-pipe systems and are configured:
- without valve;
- with 2-way valve and water probe
downstream from the valve;
- with 3-way valve and water probe
downstream of the valve;
• Operation in TTL network
The Omnia "master" is fitted with an elec-
tronic card with microprocessor, able
to manage a network of a further 5 fan
coils over a maximum network length
of 30 metres. The settings (or set points)
of the panel on the main fan coil (mas-
ter) are received by the other fan coils
(slaves) which will operate autono-
mously.
The Omnia HL fan coil with slave function
must be fitted with the electronic card
with microprocessor VMF-E0 or VMF-E1
(an accessory).
All the fan coils of the TTL network must
have the same type of configuration.
Example: all standard, all with purifi-
ers (Plasmacluster and/or germicidal
lamps), or all with an additional coil
(electric or with water).
The slave fan coils work with the settings
dictated by the master fan coil. On the
basis of the settings received from the
network and the ambient conditions
detected by the probes, the electronic
card on each single slave fan coil acts
(independently from the other fan coils)
to switch the ventilation on and off in
order to create the conditions request-
ed by the user for that specific room.
• Cooling operation
Cooling operation requires a water circuit
(by specifically trained personnel),
essential for installations in venues sub-
ject to crowding or in those with special
hygiene requirements.
The quietness of the new centrifugal
fan assembly is such that at normal
speeds of use you cannot hear when
the OMNIA HL_N cuts in. The use of
the electronic control panel avoids the
annoying noise typical of mechanical
thermostats.
The control panel is protected by a flap
on the head.
OMNIA HL_N is equipped with an elec-
tronic control panel with micropro-
cessor.It's extremely intuitive and
userfriendly, with just two knobs - one
to increase or decrease the tempera-
ture, and the other to switch on/off and
set the ventilation speed.
The settings made on the control panel
can be transmitted (without additional
with chiller.
• Heating operation
Heating operation requires a water circuit
with boiler, heat pump or solar system.
• Changeover (seasonal change)
The thermostat automatically selects the
operating mode (Heating/Cooling), if
that mode is permitted (water probe
and settings).
- Normal band: heating at 39 °C; cooling
at 17°C.
- Reduced band: heating at 35°C; cooling
at 22°C.
- Dead band, can be selected at 5°C or
2°C.
Water side changeover
- Water temperature checks
Enabling of water side ventilation (only
active with water temperature probe).
The thermostat identifies the ventilation
enabling threshold in Heating mode
(minimum controlled) and Cooling
mode (maximum controlled); with the
dip-switches it is possible to choose
between two temperature bands.
Air side changeover
If the actual room temperature is lower
than the set point by a value equal to
the dead band, there is an automatic
swap to Heating operation.
If the actual room temperature is higher
than the set point by a value equal to
the dead band, there is an automatic
swap to Cooling operation.
In the fan coil networks, the values of the
dead band are only those configured on
the master fan coil
• Pause due to power failure
After a power failure, the unit restarts
interfaces) to a network with up to 5 fan
coils, all equipped with their own elec-
tronic card. The fan coils in the network
will each adapt their own operation to
the environmental conditions detected
in that specific room.
The OMNIA HL_N fan coil has been
designed to meet all system require-
ments, thanks also to its wide range of
accessories.
Easy installation with reversible hydraulic
connections during installation.
Full compliance with accident prevention
regulations.
Routine maintenance is reduced to peri-
odic air filter cleaning with a vacuum
cleaner.
with the settings that were active prior
to the pause.
• Delayed start-up
The unit can begin ventilation some time
after start-up - usually up to 2'40" (pre-
heating function).
• Anti-freeze protection
Commands on OFF position. The fan
coil can restart in heating mode (set-
tino 12°C) if the room temperature falls
below 7°C and the temperature of the
water in the system is suitable.
In the fan coil networks, the slave fancoils
can activate the anti-freeze protection
regardless of the settings on the master
fancoil.
If the anti-freeze protection is active on
the master fan coil, all the other slave
fan coils will also adopt a setting of
12°C, regardless of their ambient condi-
tions.
• Room temperature probe
If the room temperature probe on the
slave fan coils is faulty, the temperature
will be measured by the probe of the
master.
• Ventilation
3-speed ventilation can be commanded
both manually and automatically.
- Manual, with the selector on V1, V2 and
V3. The fan is used with ON-OFF cycles
at the selected speed.
- Automatic, with the selector on AUTO.
The fan speed is managed by the ther-
mostat, on the basis of the ambient
conditions and the fan coil configura-
tion.
Thermostat settings:
- 3-level thermostat. With the selector
IHLNLJ 2204 - 6887212_02
27