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MYCOMFORT MEDIUM
GENERAL CHARACTERISTICS
LCD controller has been designed to govern the operation of Galletti indoor units with
single-phase multispeed asynchronous motor. Compared to the basic version is an
advanced moisture management and serial communication, ERGO solutions (Figure
1) or Small.
The ERGO solution provides for all controllers (up to 247) to be connected to
the supervisor software via an RS485 connection bus with Modbus protocol
G B
integrated in each controller. The chiller (or heat pump) may also be connected
to the supervision system and the software program analyses system data to
adapt operation to the actual conditions.
The SMALL solution (figure 2) sets up a Master-Slave system (up to 247 slave
terminals), in which one of the Microprocessor controllers plays the role of
Master and controls all of the other slave elements.
In this case as well the connection is made via an RS485 bus, consisting of
a simple shielded 2-conductor cable.
In the ERGO solution, the supervisor software can ascribe 4 degrees of
autonomy to the LVD controller, depending on the level of remote control that
has been assigned via the software:
> LOCAL: all functions may be accessed from the local control panel,
including speed and temperature selection and setting of the cooling or
heating mode. All operating parameters are in any case read by the system.
> REMOTE LEVEL A - maximum freedom: the operating mode is set via the
software, but all other functions are accessible from the local control panel,
including speed and temperature selection. All operating parameters are
read by the system.
> REMOTE LEVEL B – some degree of freedom: the user can choose the
fan speed and adjust the temperature set via the software by the amount
given by "+/- ? setpoint". The operating mode is automatically set by the
supervisor program.
> REMOTE LEVEL C – locked: No function can be set from the local control
panel, which is completely governed by the software.
In the SMALL version, the master (identified by the address 255) sends the
following information to the slave controllers:
(1) Operating mode (Cooling or Heating)
(2) Setpoint for room temperature.
The speed selector of each slave controller remains enabled and the room
temperature can be adjusted within a range of ± 2°C around the setpoint value
transmitted by the master controller.
MAIN FUNCTIONS AND FEATURES:
> Air temperature adjustment through automatic variation of fan speed;
> Regulation of air temperature via fan on-off control (fan runs at a fixed
speed),
> Control of On-Off valves for two or four-pipe systems
> Control of heating element for auxiliary heating.
> Cooling/heating switching in the following modes:
-
local manual switching
-
remote, manual (centralised);
-
automatic, depending on water temperature
-
automatic, depending on air temperature
> Dehumidify Function
> Serial Communication
Additional features include:
> no-voltage contact for external activation (e.g. window contact, remote
ON/OFF, occupancy sensor, etc.) which may enable or disable unit
operation (contact logic: see circuit board configuration parameters).
FC66002605 - rev. 02
È severamente vietata la riproduzione anche parziale di questo manuale / All copying, even partial, of this manual is strictly forbidden
> no-voltage contact for centralised remote Cooling/Heating changeover
(contact logic: see circuit board configuration parameters).
> no-voltage contact for remote enabling of the economy mode (contact
logic: see circuit board configuration parameters).
> remote water temperature probe (accessory)
> internal temperature probe
> internal humidity probe
> remote air temperature probe (accessory) (this probe, if present, is used
in place of the internal one for the measurement of room temperature).
> Remote humidity probe (accessory - to be used in combination with the
remote temperature probe)
The control panel is composed of:
> LCD display
> key board
LCD DISPLAY (SEE FIGURE 3)
(1)
room temperature
(2)
room humidity
(3)
set temperature
ON
fan status. When flashing it indicates that fans are off standing for
a call from the thermostat. If the symbol is steadily lit it means that
the fans are running
OFF
fan status. Fans are off as speed is set to Off or the control is off.
AUTO automatic ventilation logic
fan speed
operation mode: Cooling. When flashing it indicates that water
circuit is not enabled to fan ventilation.
operation mode: Heating. When flashing it indicates that water
circuit is not enabled to fan ventilation.
Dehumidification. Se lampeggiante indica la mancanza di con-
senso per la deumidificazione; con simbolo acceso fisso indica
invece che tale funzione è attiva
Economy option enabled
Alarm triggered
Minimum Temperature Control
valve open
Electric heating element. The flashing symbol signals that the
heating element has been selected; the permanently lit symbol
signals that the heating element is operating (from release M04
onwards)
Serial communication active. The flashing symbol indicates that
the controller is in the Remote C status (ERGO solution) or is the
master of a SMALL network
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