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EKC347 の電気的特性と機能

EKC347のメーカーはDanfossです、この部品の機能は「Liquid Level Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 EKC347
部品説明 Liquid Level Controller
メーカ Danfoss
ロゴ Danfoss ロゴ 




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EKC347 Datasheet, EKC347 PDF,ピン配置, 機能
REFRIGERATION AND
AIR CONDITIONING
EKC 347
Liquid Level Controller
Manual

1 Page





EKC347 pdf, ピン配列
Manual
EKC 347 Liquid Level Controller
Introduction
The EKC 347 is a PI liquid level controller that can be used for
regulation of refrigerant level in:
• Pump packages
• Economizers
• Separators
• Condensers
• Intermediate coolers
• Receivers
Application examples
Pump package (liquid separator)
Modulating control of injection provides more stable liquid
level and more stable suction pressure.
A signal transmitter constantly measures the refrigerant liquid level
in the receiver. The controller receives the signal. Its user-selected
program controls the valve to regulate the refrigerant level to the
user-specified setpoint.
Valve compatibility
The EKC 347 can control liquid level in systems with these valves:
Type ICM motorized modulating valve
with ICAD motor actuator
Types AKV or AKVA pulse width
modulating expansion valve
Solenoid valve for on-off control
Features
Generates alarm when user-programmed limits are exceeded
3 relay outputs for upper and lower level limits and for alarm level
Accepts analog input signal that can offset the liquid level setpoint
Controls liquid level on high or low pressure side of the system
When AKV/A is selected, a master-slave system can run up to 3
AKV/A valves with distributed opening degree
Manual control of output
Able to limit minimum and maximum valve opening degree.
Receiver or condenser
The control system’s short reaction time makes it well suited
for high pressure float systems with small refrigerant charges.
Ordering
Type
EKC 347
Function
Liquid level controller
Code No.
084B7067
Multiple AKV/A control in master-slave configuration
The schematic drawing below shows how multiple controllers
can be used to control multiple AKV/A valves.
3
USCO.PS.G00.A1.22 / 521U0079
© Danfoss A/S (USCO/HMR_MKS), 10 - 2007


3Pages


EKC347 電子部品, 半導体
Manual
Regulation Examples
EKC 347 Liquid Level Controller
Regulation Example 1
Programming the EKC 347 for use with ICM Motorized valve with
ICAD motor-actuator
The factory settings for the EKC 347 assume that it will be used on
the low pressure side of the system to regulate an ICM motorized
valve with ICAD motor-actuator, using a 4-20 mA signal, and a level
probe type AKS 41U. For most applications using these components,
only the following settings will need to be changed:
1) Set the user-defined liquid level percentage to be maintained.
Note that this setting does not have a parameter and is accessed
by pushing both EKC 347 buttons simultaneously when the
controller is showing the standard display (not in programming
mode).
2) Set user-defined parameter n04. This is the P-band in percent
liquid level, the liquid level range around the liquid level setpoint
in which the controller will try to regulate. See regulation example
1 at right for more details.
Liquid
level (%)
Valve opening 0%
Setpoint (% liquid level)
Valve opening 100%
Regulation example 1. Valve opening percentage will modulate to
maintain the setpoint liquid level percentage. The P-band defines
the liquid level percentage range allowed.
3) Change parameter o12 to 1 (for 60 Hz), the frequency of the
controller power supply (unless the supply is 50 Hz).
4) Set user-defined alarm parameters. See the alarm section in “Alarm
parameters.”
Note that some applications will require that additional settings
be changed. Review the settings and parameters on the following
pages to ensure that the controller is completely set up for your
application.
Regulation example 2
Solenoid on-off control on low pressure side of the system
For this application, the following settings must be programmed:
1. Parameter o09: 3 or 4, depending on the output on terminals 2
and 5
2. Enter the user-defined setpoint (the liquid level % to be
maintained). Note that this setting does not have a parameter
and is accessed by pushing both EKC 347 buttons simultaneously
when the controller is showing the standard display (not in
programming mode).
3. Set the user-defined differential (dead band), parameter n34, to
the % liquid level around the setpoint that defines the dead band.
The valve will be opened and closed as shown in the diagram at
right.
4. Set the P-band (parameter n04) to 0%, which corresponds to OFF
(parameter n04 = 0).
5. Change the frequency of the controller to 60 Hz
(parameter o12 = 1).
6. Set user-defined alarm parameters according to your
requirements and your application
Note that some applications will require that additional settings
be changed. Review the settings and parameters on the following
pages to ensure that the controller is completely set up for your
application.
Liq. Level
Set Point
Dead band (di erential), set by parameter n34
ON OFF ON OFF ON
Solenoid output (24Va.c.) from EKC 347 terminals 23 and 24.
Regulation example 2. When the controller is set up for the low
pressure side of a system, the solenoid valve will open and close as
shown in the diagram above.
6
USCO.PS.G00.A1.22 / 521U0079
© Danfoss A/S (USCO/HMR_MKS), 10 - 2007

6 Page



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部品番号部品説明メーカ
EKC347

Liquid Level Controller

Danfoss
Danfoss


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