Installation and operation manual
3
4PW17551-1B
ECFWER6
Microprocessor controller for fan coils
Description of the operating modes
With the speed selector switch turned to
, the fan
speed is switched automatically based on the difference
between the temperature set on the thermostat and the
room temperature.
With the selector switch turned to
,
, or
the
ventilation mode is of the ON/OFF type.
With the speed selector switch turned to
, the fan
speed is switched automatically based on the difference
between the temperature set on the thermostat and the
room temperature.
With the selector switch turned to
,
, or
the
ventilation mode is of the ON/OFF type.
The water valve is shut off once the desired temperature
is reached
In cooling mode the fan continues at minimum speed,
even after the valve of the cooling circuit has shut off.
In heating mode the fan is stopped as soon as the valve
of the heating circuit is shut off.
With the speed selector switch turned to
, the fan
speed is switched automatically based on the difference
between the temperature set on the thermostat and the
room temperature.
With the selector switch turned to
,
, or
the
ventilation mode is of the ON/OFF type.
The water valve is shut off once the desired temperature
is reached
In cooling mode the fan continues at minimum speed
even after the valve of the cooling circuit has shut off.
In heating mode the fan is stopped as soon the valve of
the heating circuit is shut off.
The controller is pre-arranged to operate manually in the
desired mode. It is enabled by pressing the selector key.
The blue (cooling) and red (heating) LEDs point out the
selected operating mode.
The controller is pre-arranged to operate manually and
remotely in the desired mode. This mode is carried out
by connecting the system to a remote switch. Use the
special terminals on the electronic PCB of the controller.
The controller automatically selects the cooling or
heating mode based on the temperature of the water and
according to the following logic:
Water temperature <17°C — cooling mode is set
Water temperature >37°C — heating mode is set
Water temperature between 17°C and 37°C — the
system is disabled
Room thermostat with air temperature control
Room thermostat with ON/OFF valve control for
2-pipe systems
Room thermostat with ON/OFF valve control for
4-pipe systems
Manual built-in cooling/heating switching mode
Manual remote cooling/heating switching mode
Automatic cooling/heating switching mode
based on the water temperature
For switching based on water temperature, the
supplied water probe needs to be installed.
See chapter "Position of the water temperature
probe" on page 11 for installation of the water
temperature probe.
In this type of configuration, the input for the
centralised cooling/heating switching mode is
disabled.
M
MD
H
2
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1B_I+OM_4PW17551-1B.book Page 3 Wednesday, October 5, 2005 9:18 AM
