General Characteristics; Control Panel; Main Functions - Galletti MYCOMFORT LARGE Manual Del Usuario

MYCOMFORT LARGE

GENERAL CHARACTERISTICS

The LARGE version of LCD controller has been designed to govern the
operation of Galletti indoor units with single-phase multispeed asynchronous
motor or to be coupled to an inverter for fan speed modulation. As for the
MEDIUM version it has the added features of advanced humidity control and
serial communication for connecting to two types of network:
- ERGO supervision system (LARGE solution);
- MASTER/SLAVE with MY COMFORT controls only (SMALL solution)
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LARGE SOLUTION (see figure 1)
The LARGE solution provides for all controllers (up to 247) to be connected
to the ERGO supervisor software (from version 2.0 up) via an RS485
connection bus with Modbus protocol 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 supervisor software can ascribe 4 degrees of autonomy to the LCD
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: 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.
SMALL SOLUTION (see figure 2)
The Small solution sets up a Master-Slave system (up to 247 slave terminals),
in which one of the LCD 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.
The MASTER controller identified by the address 255), sends the following
information to the SLAVE controllers:
1. Operation mode (Cooling or Heating)
2. Limits for adjusting the room temperature SETPOINT (in both SUMMER
and WINTER modes): from each SLAVE controller the SETPOINT
programmed on the MASTER controller can be adjusted by ± 2°C
3. ON/OFF status of the controller: all SLAVE controllers will conform to the
ON/OFF status of the MASTER controller
4. Enabling the controller minimum room temperature
With ON thermostat: display of current water temperature

MAIN FUNCTIONS

- Air temperature adjustment through automatic step regulation of fan speed or by
modulating the fan speed.
- regulation of air temperature via fan on-off control (fan runs at a fixed speed),
- control of On-Off or modulating 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
- timer-programmed operating mode.
FC66002638 - rev. 05
È severamente vietata la riproduzione anche parziale di questo manuale / All copying, even partial, of this manual is strictly forbidden
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).
- 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 sensor
- 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)
- two configurable digital outputs (no-voltage contacts) (see "Configuration
parameters of board")

CONTROL PANEL

The control panel is composed of:
- LCD display - back lit
- keyboard with 7 keys
LCD DISPLAY - BACK LIT (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. When flashing it indicates that the circuit is not
enabled to dehumidification. If the symbol is steadily lit it means
that the function is active
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 L08
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
The backlight switches on every time a button is pressed and automatically
switches off about 2 minutes after the last button was pressed.
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