Daikin EWTP400MBYN — управление супернасыщением для автономных устройств [234/452]

Превью страниц Страница 234 / 452
Daikin EWTP400MBYN [234/452] Superheat control
Functional Control for a Standalone Unit ESIE05-07
2–38 Part 2 – Functional Description
3
1
2
4
5
2.8 Superheat Control
Introduction To control the superheat there are two possibilities: either a thermostatic expansion valve either an
electronic expansion valve.
The thermostatic expansion valve works independently and is not connected to the controller.
The electronic expansion valve (EEV) is connected to the controller through a driver. (EEV-driver). The
controller controls the EEV-driver by exchange of parameters.
Applicable units P EWWD240~280MBYNN
P EWWD440~540MBYNN
P EWLD240~260MBYNN
P EWLD400~540MBYNN
Basic unit setup The unit setup is shown in Part 1 chapter 3–Basic unit setup.
The table below gives an overview of the dipswitch settings.
Example of dipswitch setting:
P Address 1 = 100000
P Address 2 = 010000
P Address 3 = 110000
P Address 4 = 001000
The dipswitches of the EEV driver can be found on the inner side of the driver. The cap of the EEV
driver (cap with the LED's) must be removed. When the cap is removed, the address dipswitches are
accessible on the inner side of the cap.
Functional
description
The basic operation is shown in the picture below. However it is important to know that in changing
some of the parameters with the pCO
2
, the EEV power must be shut off before the parameters are
actually changed: e.g. battery on NO, addressing.
PCB (pCO²
medium or
large)
User
terminal
(optional)
EEV1
(if present)
EEV2
(if present)
Unit 1Master1234
Unit 2Slave 15678
Unit 3 Slave 2 9 10 11 12
Unit 4Slave 313141516
Low pressure
Regulate on
pressure
setpoint
MAXOPMINOP
MINOPDIFF MAXOPDIFFRegulate on
superheat
setpoint
Regulate on
pressure
setpoint
ESIE05-07.book Page 38 Wednesday, October 11, 2006 10:42 AM

Содержание

1124

Изучите возможности управления супернасыщением с помощью термостатического и электронного расширительных клапанов. Узнайте о настройках и функциональных особенностях.