Daikin EWYQ230DAYN [348/524] 6bar b3 37 bar

Daikin EWAQ240DAYN [348/524] 6bar b3 37 bar
Functional Control for a Standalone Unit ESIE06-05
2–122 Part 2 – Functional Description
3
1
2
4
5
The parameters for the fan regulation can be changed in the Service/Fan menu.
High pressure
control: Fanstep
up/down by
pressureA/B1/B2
HP < A : if below setpoint for 10 sec then 1 fanstep DOWN
HP > B1 or B2: 1 fanstep UP.
- Min time for next fan step up 15sec.
- Min time for next fan down 90sec.
During these timer no fanstep up or down is allowed.
-If 1 compressor is running or no compressor running, then:
B1(50%)=B1-2,6b & B2(50%)=B2 - 2, 6b.
-Extra condition For Fanstep up, Compare present High pressure and High pressure from 30 sec
before (memorize and compare with sampling time of 5 sec.), Fanstep up is only allowed if there
is a rise of 1,9 bar or more.
-Extra condition For Fanstep down, Compare present High pressure and High pressure from 30
sec before, Fanstep down is only allowed if there is a drop of 1,9 bar or more.
High pressure
control: Fanstep
up/down be
pressure B3
(Avoid problem of Fan up decline because of minimum time up condition.)
HP > B3. 1 fanstep up.
- Minimum time between fanstep up (by B1/B2 or B3) and next fan step up (by B3) is 10 sec.
Low noise mode
with inverter fans
Low noise is only possible when inverter fans are installed.
The fan control in low noise mode is the same as standard inverter control. Only the setpoints A/B2/B3
are different (higher value). These parameters can be changed in the service/fan menu.
This function can be activated by a changeable input or a daily schedule.
Example of low noise operation with daily schedule.
Fanstep
100%
95%
Step
Down
Step
Up
30%
20%
A: 28 bar B2:35bar
B2 (50%):
32,4 bar
2,6bar
B3: 37 bar
Min. time
between
UP& UP:
10sec
Min. time
between
UP& UP:
15sec
Min. time
between
DWN& DWN:
90sec
In case 1 comp or
no compr running
High pressure

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