Airwell DFO 5 - 9 - 17, Installation And Operation Manual

Page: 23 / 45

6 - ELECTRICAL CONNECTIONS
6.11 SUPERVISION - RETE MODBUS
RS 485 MODULE
Perform the addressing by S3, S4 S5 ; allowed and valid
addresses from 1 to 127
S3 it sets the address dozens
S4 it sets the address units
S5 it sets the address hundreds : ON = 100, OFF = 0
S1 485 terminator : ON = termination YES
S2 line polarizer : OFF = polarization NO
Check that it is OFF on all the cards
For improve the comunication put S2 = ON on a single
card.
If more cards are polarized, faults occur
J1 RS 485 serial
J3 TTL serial
Factory setting :
8 : ON = Heat/Cool change from remote selector
OFF = Heat/Cool change from thermostat
In ECO mode 3, 4, 5, 6 are not managed.
The “fan at satisfied thermoregulator" function (3, 4) is active
only if 5 , 6 in OFF.
DP1
Couple of conductors twisted and shielded
Section of conductor 0,22mm
2
…0,35mm
2
Nominal capacity between conductors < 50 pF/m
nominal impedance 120
Ω
Recommended cable BELDEN 3105A
RS485 RS485 RS485
FUNCTIONS TI
1 : ON = disabled compressor in HEAT
OFF = enabled compressor in HEAT
2 : ON = enabled resistances in HEAT
OFF = disabled resistances in HEAT
3 : ON = active fan at satisfied thermoregulator in HEAT
OFF = stopped fan
4 : ON = active fan at satisfied thermoregulator in COOL
OFF = stopped fan
5 : ON = periodical ventilation in HEAT enabled
OFF = periodical ventilation in HEAT disabled
HE
6 : ON = periodical ventilation in COOL enabled
OFF = periodical ventilation in COOL disabled
7 : ON = 2-way modulating valve
OFF = 2-way ON-OFF valve