AERMEC PLASMACLUSTER Omnia HL PC Manuel D'utilisation Et D'installation page 20

GB
OPERATION
OMNIA HL PC - HL PCM fancoils are delivered ready to
operate in standard configuration, though can be adjusted
by the installation technician to specific requirements by
means of dedicated accessories and configuration of func-
tions at the internal dipswitches (see DIPSWITCH CONFI-
GURATION).
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 set-
ting 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 temperature detected).
Ventilation is only permitted with louvers open (manually in
the case of units without motorised louvers).
Season changeover
The thermostat automatically changes function mode (hea-
ting in winter mode and cooling in summer mode).
Season changes are triggered by the temperature 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 sum-
mer mode.
(Settings are configurable by means of the DIP-switches.).
Water temperature controls
The thermostat permits fan operation only if water tempera-
ture is suitable for the active mode (winter or summer).
The fan enabling thresholds are as follows:
- 39°C in normal winter mode or 35°C in economy winter mode,
- 17°C in normal summer mode or 22°C in economy sum-
mer mode.
(Settings are configurable by means of the DIP-switch swit-
ches.)
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 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 yellow 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-
20
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.
PACKAGING
The fancoils are delivered in standard packing comprising
protective shells and cardboard.
INSTALLATION
IMPORTANT: check that the power supply is disconnected
before performing operations on the unit.
CAUTION: wiring connections installation of the fancoil
and relevant accessories should be performed by a techni-
cian who has the necessary technical and professional
expertise to install, modify, extend and maintain plants and
who is able to check the plants for the purposes of safety
and correct operation.
Install the fancoil in a position that will facilitate routine (fil-
ter cleaning) and special maintenance, and easy access to
the air breather valve on the side of the unit (connections
side).
Note that certain operating conditions could lead to the for-
mation of condensate on the unit housing with subsequent
dripping, or faults to the water circuit or condensate draina-
ge could cause liquids to overflow. For these reasons, avoid
installing the unit on surfaces damageable by moisture.
Make sure that the unit is installed in a site where the
ambient temperature is inside the minimum and maximum
limits 0 - 45°C (<85% R.H.).
To install the unit, proceed as follows:
a) Slacken the screws and remove the housing.
b) For free-standing installation on feet, refer to the instruc-
tions provided with the unit.
c) Use expansion plugs (not supplied) when mounting the
unit on the wall.
d) Make water connections. To make the air vent from the
coil easier, you are recommended to connect the outlet
water pipe with the connection positioned on the top,
the possible inversion will not affect the proper unit ope-
ration.
The position and diameter of water connectors are given
in the dimensional data.
Insulation of water lines is recommended. Install the con-
densate water collection tray (optional accessory) to pre-
vent dripping during cooling operation.
Size and arrange the condensate drain system in such a
way as to ensure a gradient of at least 1%. If drainage is
emptied into the sewerage system, fit a siphon to prevent
the return of unpleasant odours into the room.
Test the seal of water and condensate drainage connec-
tions.
e) Fit accessories (as applicable).
f) To modify electronic thermostat settings, adjust the
dipswitches inside the panel (see section "DIPSWITCH
CONFIGURATION").
g) Make all wiring connections as shown in wiring diagrams
and the section "ELECTRICAL CONNECTIONS". Connect
the control panel to the connector on the inside of the
fancoil, then earth the unit.
h) Check that the air filter is correctly fitted.
i) Run an Autotest to check that the fancoil operates correc-
tly.