Daikin FWEC2, Installation And Operation Manual

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Installation and operation manual
5
FWEC2
Advanced electronic controller
FC66002764
AVAILABLE CONFIGURATIONS (PARAMETER P
00
)
036
■
System pipes:
4
■
Valve:
2-3 WAYS
■
Electrical heater:
NO
■
Fan speed:
4
■
Summer/winter switching logic:
AUTOMATIC AIR SIDE
037
■
System pipes:
4
■
Valve:
NO
■
Electrical heater:
YES
■
Fan speed:
3
■
Summer/winter switching logic:
LOCAL MANUAL
038
■
System pipes:
4
■
Valve:
NO
■
Electrical heater:
YES
■
Fan speed:
4
■
Summer/winter switching logic:
LOCAL MANUAL
SERIAL COMMUNICATION
Connection to the RS485 communication network
The communication network (bus type) relies on a simple
shielded 2-conductor cable, directly connected to the RS485
serial ports of the controllers (terminals A, B and GND).
“For the network use a cable AWG 24 (diam. 0.511 mm)”
The communication network must have the following general
structure (
fi gure 4).
In the case of the “MASTER-SLAVE” solution a termination
resistor will have to be installed on both controllers at the
furthest ends of the network.
N.B.:
(1) Comply with the polarity of the connection: indi-
cated with A(-) and B(+)
(2) Ground shield at one end only
____________________________________________________________
W
ARNING
:
■
Use a shielded cable AWG24
■
Colours suggested for the communication
network: A (-) Brown ; B (+) Yellow
____________________________________________________________
LOGICS
COOLING/HEATING SWITCHING
Four logics are present to select the thermostat operating
modes according to the controller con
fi guration setting:
1.
Local
: user choice made through the key
2.
Distance
: depending on the Digital Input DI1 status (contact
logic: see con fi guration parameters of board)
3. Depending on water temperature
N.B.
: in case of water sensor alarm, the controller returns
to the Local mode temporarily.
4. depending on air temperature
Where:
■
Set
is the temperature setting made by the arrows
■
ZN
is the neutral zone (parameter P03)
The thermostat operating mode is indicated on the display by
the symbols (cooling) and (heating)
FAN SPEED CONTROL
The controller can govern 3 or 4-speed indoor units
OPERATING SPEED SELECTION
Using Fan key it is possible to select the following
speeds:
■
Automatic ventilation
: depending on the set temperature
and the room air temperature
With 3-speed con fi gurations :
where:
1
= low speed
2
= medium speed
3
= maximum speed
Summer
Winter
Air temp.
Summer
Winter
Water temp.
COOLING
HEATING