Operation - AERMEC Omnia HL C-Serie Bedienungs- Und Installationsanleitung

RED/BLUE/PINK LED (C)
- Displays the operating mode -
HEATING or COOLING - currently
requested by the electronic thermo-
stat and whether the heating system
is able to satisfy the request.
SELECTOR (A)
- On/Off
- Automatic operation
- Manual speed selection

OPERATION

OMNIA HL C - HL CM fancoils are delive-
red ready to operate in standard con-
figuration, though can be adjusted by
the installation technician to specific
requirements by means of dedicated
accessories and configuration of fun-
ctions at the internal dipswitches (see
DIPSWITCH CONFIGURATION).
Response to controls is immediate,
except in special cases.
Unit types
OMNIA HL units are designed for twin-
tube units without valve.
Ventilation
Ventilation speed can be controlled
either manually by setting the selector
switch A to position V1, V2 or V3 (the fan
operates in on-off cycles according to the
speed selected), or automatically when
the selector switch is set to the AUTO
position (fan speed is controlled by the
thermostat according to room tempera-
ture detected).
Ventilation is only permitted with lou-
vers open (manually in the case of units
without motorised louvers).
Season changeover
The thermostat automatically changes
function mode (heating in winter
mode and cooling in summer mode).
Season changes are triggered by the tem-
perature of the water in the system:
- 35°C in normal winter mode or 31°C in
economy winter mode,
- 22°C in normal summer mode or 25°C
in economy summer mode.
(Settings are configurable by means of
26
IHLLX 2204 - 6887202_04
the DIP-switches.).
Water temperature controls
The thermostat permits fan operation
only if water temperature is suitable for
the active mode (winter or summer).
The fan enabling thresholds are as fol-
lows:
- 39°C in normal winter mode or 35°C in eco-
nomy winter mode,
- 17°C in normal summer mode or 22°C in
economy summer mode.
(Settings are configurable by means of
the DIP-switch switches.)
If water temperature is not suitable for
the set functioning mode, the control
panel alternately flashes LED C in violet
and red or blue depending on the mode
active at the time.
Probe correction
The required correction to be applied to
the ambient probe can be selected.
Frost Protection
This function prevents room temperature
from dropping below an ambient tem-
perature of 7°C (even when the fancoil
is off and selector switch A is in the OFF
position).
In the event that room temperature
drops below 7°C, the thermostat starts up
the fancoil in heating mode at a tempera-
ture setting of 12°C and fan operation set
to AUTO (if permitted by water tempera-
ture, the unit is connected to the power
supply and the louvers are open, in the
case of manual units).
Frost protection mode is deactivated
when room temperature rises above 9°C.
Emergency mode
In the event of fault in the ambient probe,
WHITE LED (D)
- Indicates ventilation request by the
electronic thermostat.
SELECTOR (B)
- S e l e c t i o n o f
r e d r o o m t e m p e r a t u r e .
the thermostat operates as follows:
- ambient probe SA fault: the thermostat
sets to Emergency mode (indicated by
the flashing of white LED D).
- with selector switch (A) in OFF position:
fan off;
- with selector switch (A) in AUTO, V1, V2
or V3 position: the fan performs on-off
cycles; in this case, the power supplied
by the terminal is controlled manually by
means of the temperature selector switch
(B): rotate the switch to right to increase
cycle duration, or to the left to reduce it.
- water probe SW fault: the thermostat
sets to "Season changeover" mode.
- ventilation is constantly enabled.
Season changeover proceeds as follows:
a) when the thermostat is in cooling
mode and the thermostat request is 5°C
below the setting, the thermostat auto-
matically requests heating mode;
b) when the thermostat is in heating
mode and the thermostat request is 5°C
higher than the setting, the thermostat
automatically requests cooling mode.
r e q u i -