Daikin EWYQ130DAYN [349/524] H00 22h00

Daikin EWYQ150DAYN [349/524] H00 22h00
ESIE06-05 Functional Control for a Standalone Unit
Part 2 – Functional Description 2–123
3
2
4
5
1
Anti hunting control When the fanstep modifies with + one fanstep and it becomes again the same fanstep within 720
seconds, then :
the B3 = 35 bar condition is required for the next fanstep up (Reason: Pressure differential bigger
than estimated).
Anti-hunting will prevent frequently switching between two fan steps.
Reset anti-hunting
control.
Anti-hunting control will be reset (normal fan control) if one of the following conditions is fulfilled:
unit stop/ Thermo OFF
1,5 hour after start of anti-hunting control.
outlet water temperature rise: +2°C or more (HP rise due to LP rise).
Ambient temperature rise : 1 comp step up (HP rise due to load rise).
Comp step drop : 1 compr step down (Deferential drop due to load drop).
Example :
Pressure difference
surveillance control
The fan control will make a fan step down if the compression ratio of a circuit is too low, this to create
a bigger compression ratio.
Make a fanstep down in case of below condition.
1.6 > (Compression ratio (HP+1.92)/ (LP+1.92)) : For 30 sec or more.
Also in this case the minimum time between fanstep down and next fanstep down of 180sec is valid.
This would mean that after the 180sec the ratio is compared with the ratio with 30 sec before.
00h00
1 : START :22h00
2 : STOP :26h00
Time
Low noise
Fans running in low noise mode (higher pressure)
06h00 22h00
At this point B3
condition becomes
valid for fan step up
B2 Condition for
Fanstep up
720 sec
Time
Reset condition:
Unit stop or thermostat off
Or 1.5 hour past
or outlet water temp rise
or ambient temp rise
or compr step rise
or compr step drop
20%
30%
M
H
Fanstep
...
...
Maximum + or ñ 1
fanstep
B3 Condition for
Fanstep up
B2 Condition for
Fanstep up
At this point B2
condition becomes
valid for fan step up

Содержание

Скачать