AERMEC Omnia HL 11 CM, Technical And Installation Booklet

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depends on the status of the fan coil and can reach a maxi-
mum value of -4,5°C.
Frost Protection
This function prevents room temperature from dropping
below an ambient temperature of 7°C (even when the fan-
coil 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 tempe-
rature setting of 12°C and fan operation set to AUTO (if per-
mitted by water temperature, 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 temperatu-
re rises above 9°C.
Emergency mode
In the event of fault in the ambient probe, 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 sup-
plied 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 chan-
geover" mode.
- ventilation is constantly enabled.
Season changeover proceeds as follows:
a) when the thermostat is in cooling mode and the thermo-
stat request is 5°C below the setting, the thermostat automa-
tically requests heating mode;
b) when the thermostat is in heating mode and the thermo-
stat request is 5°C higher than the setting, the thermostat
automatically requests cooling mode.
0,9
-2,4
V1
V2
V3
-3,6
-4,8 3,6
2,7
1,8
-0,4 -0,9
0,4
V1
V2
V3
0,9
-1,8
V1
V2
V3
-2,7
-3,6
3,6
2,7
1,8
-0,4 -0,9
0,4
V1
V2
V3
Thermostatic control with Normal Band Modulated Power
Thermostatic control with Wide Band Modulated Power
THERMOSTATIC CONTROL WITH MODULATED POWER
Ventilation Ventilation
Ventilation Ventilation
Tset
Hot Tset
Cold
Tset
Hot Tset
Cold
Motorised slat or valve
Motorised slat or valve
Motorised slat or valve
Motorised slat or valve
Thermostatic control with Modulated Power
This setting (Dip 1 in the OFF position), allows the desired
room temperature to be maintained by modulating the
capacity generated by the terminal by performing fan swit-
ching cycles with variable Duty Cycle.
12 different capacity levels in the Cooling mode and
12 in the Heating mode are used if the
Normal Band is
set (Dip.2 in the OFF position), or 12 different levels of capacity in
the Cooling mode and 16 in the Heating mode if the
Wide Band
is set (Dip.2 in the ON position).
The rectangles (V1, V2 and V3) shown in the figures show
the fields of capacity modulation :
V1 , indicates that the capacity is modulated by cycles of the
V1-OFF type (minimum speed is off), with fixed period and
varying the duration of the V1phase with regard to OFF.
V2 , indicates that the capacity is modulated by cycles of the
V2-V1type (medium and minimum speed), with varying the
duration of the V2 phase with regard to V1.
V3 , indicates that the capacity is modulated by cycles of the
V3-V2 type (maximum and medium speed), with varying
the duration of the V3 phase with regard to V2.