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FWEC3
Advanced plus electronic controller
Installation and
operation manual
Installation and operation manual
1
FWEC3
Advanced plus electronic controller
FC66002765
GENERAL CHARACTERISTICS
The ADVANCED PLUS version of LCD controller has been
designed to manage the operation of indoor units with single-
phase multispeed asynchronous motor. As for the ADVANCED
version it has the added features of advanced humidity control
and MASTER/SLAVE with ADVANCED controls only.
MASTER-SLAVE SOLUTION (SEE FIGURE 1)
The Master-Slave solution sets up a Master-Slave system (up
to 247 slave terminals), in which one of the LCD Micropro-
cessor 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 (identi
fi ed 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
fi xed speed),
■
control of On-Off or modulating valves for two or four-pipe
systems,
■
control of electrical heater 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.
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 con
fi guration parameters).
■
no-voltage contact for centralised remote Cooling/Heating
changeover (contact logic: see circuit board con
fi guration
parameters).
■
no-voltage contact for remote enabling of the economy
mode (contact logic: see circuit board con
fi guration pa-
rameters).
■
remote water temperature probe (FWTSKA accessory)
■
internal temperature sensor
■
internal humidity probe
■
remote air temperature probe (FWTSKA accessory) (this
probe, if present, is used in place of the internal one for
the measurement of room temperature).
■
remote humidity probe (FWHSKA accessory - to be used
in combination with the remote temperature probe)
■
two con fi gurable digital outputs (no-voltage contacts) (see
“Con fi guration 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 2)
(1) room temperature
(2) room humidity
(3) set temperature
ON fan status. When fl ashing 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 fl ashing it indicates
that water circuit is not enabled to fan ventilation.
operation mode: Heating. When fl ashing it indicates
that water circuit is not enabled to fan ventilation.
Dehumidi fi cation. When fl ashing it indicates that
the circuit is not enabled to dehumidi fi cation. If the
symbol is steadily lit it means that the function is
active
Economy option enabled
Alarm triggered
Minimum Temperature Control
valve open
electrical heater: If the symbol fl ashes it means that
the electrical heater is on; if steadily lit it means only
that the electrical heater has been selected
serial communication active. The fl ashing symbol
indicates that the controller is the master of a
network
The backlight switches on every time a button is pressed
and automatically switches off about 2 minutes after the last
button was pressed.