Daikin EWAP460MBYN Сервис мануал онлайн [227/452] 524349

Daikin EWAP460MBYN Сервис мануал онлайн [227/452] 524349
ESIE05-07 Functional Control for a Standalone Unit
Part 2 – Functional Description 2–31
3
2
4
5
1
Remark:
Maximum Fan-shift-value is determined as follows: (Fan Lower Lim +Fan-step Difference + Fan-Shift)
HP-Setback - 0.5 bar.
If this is not the case then Fan-Shift = HP-Setback - 0.5 bar - Fan Higher Lim.
Function
description:
Inverter fan
management
The inverter fan management uses a PI-logic algorithm to determine the optimal fan speed. The
inverter uses a 0 to 10 V signal to regulate the fan speed between 0 and 50 Hz.
The global logic is represented in following figure:
C1) Determine setpoint
If heat recovery is not active then the high pressure setpoint is equal to Fan Inverter setpoint.
If heat recovery is active then the high pressure setpoint is calculated.
If low noise is active then the high pressure setpoint = Fan Inverter setpoint + Fan setpoint Shift
Remark:
- Minimum shift = 0.0 bar.
- Maximum shift = HP Setback – 0.5 bar- Fan Inverter setpoint.
Remark: if both low noise and heat recovery are selected, the highest setpoint of these two will be
selected.
C2) PI algorithm
This is a mathematical algorithm that consists of a proportional and an integrating term, which is used
to determine the necessary fan capacity.
C3) Determine fan on/off and fan inverter value
1) Transformation table (theoretical)
This function transforms the results of the PI algorithm into a signal which will activate the fans.
The theoretical values are listed below:
x [%]
(Output signal)
Inverter fans On/Off fans
Up 0
−> 50% 0 −> 10V 0 −>50Hz Off
50% 0V 0Hz On
50
−>100% 0 −> 10V 0 −>50Hz On
Down 100
−>50% 10 −>0V 50 −>0hz On
50% 10V 50Hz Off
50
−>0% 10 −>0V 50 −>0Hz Off
C1)
Determine
HPsetpoint
C2)
PI
algorithm
C3)
Determine
Fan On/Off
Fan in (Hz)
Proces
HPSetpoint High pressure
ESIE05-07.book Page 31 Wednesday, October 11, 2006 10:42 AM

Содержание

Скачать