1592001830 XC645D GB r3.4 04.09.2017.docx XC645D
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18.3 Condenser with Inverter or Ec Fans
–Analog Output Setting
This configuration is used when all fans of the condensing group are ECI fans or driven by one
inverter or a chopped phase driver.
The capacity used by the inverter is proportional to the delivery pressure value inside the
regulation band (SETF-Pb/2÷ SETF+Pb/2).
18.3.1
Condenser fan configurations and Parameters
Parameter
Description
Action
oA(i) = inF
Set 1 relay for inverter
One relay is used to enable the action of the inverter.
AoC = tEn
Analog output setting
Set the output as 0-10V
AoF = InF
Analog output function
Set the output to drive ECI or inverter fan
AOM =0
Minimum
value
for
analog output
The minimum voltage is 0V.
NOTE
: verify on the inverter of ECI fan of chopped
phase driver that with this input a proper output is
supplied to the fan.
AOt = 5
Time of analog output
at max after the start
To start the fan the controller supplies 10V output for
5s, then starts standard regulation
MPM = 100
Maximum % variation
per minute
The analog output takes 1 min to move from the min
to the maximum
18.3.2
How to set it
Parameters involved: oA(i) = inF; AoC = tEn, AoF = InF, Aot = 0, AOM = 30, MPM = 100
P2
Volt
10
0
AOM
100
10
P2
SETF-Pb /2
SETF+ Pb /2
On
OAi = inF
SETF-Pb /2
SETF- Pb 100-2AOM
2 100
a.
If required, set a relay to drive the invert (is used to signal to the inverter to start and stop the
regulation), by setting:
oA(i) = inF
inverter for fans
b.
Set the kind of signal of the analog output current (4-20ma) or voltage (0-10V) by the
Analog output setting
parameter
“
AoC
”: tEn =
0÷10V output;
cUr =
4-20mA output
c.
Set the function of the analog output:
AoF = InF
d.
Set the time of the analog output at max after start up EI: Aot = 3s
e.
Set the max % variation per min (MP)
f.
At last set also the percentage of analog output in case of probe failure
:
(0 ÷ 100%)
SAO
18.4
Analog output “free”
This setting is used to link the analog output 1 to a temperature probe. The analog output will take
values proportional to the temperatures detected by the probe P3 or P4, according to the setting.
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