Specifications

134 RK0YG302 © Danfoss 05/2007
System
A signal transmitter will constantly measure the refrigerant liquid
level in the reservoir - the controller will receive the signal and
subsequently control the valve, in order to control the refrigerant
liquid level according to liquid level setpoint.
Signaltransmitter
With the capacitive rod it is possible to set the refrigerant level
within a wide range.
EKC 347
The controller receive a signal and are then able to contol low or
high side applications. A analog input signal (voltage/ current)
can displace the setpoint and then remote change of setpoint is
thus possible.
EKC 347 does support 2 types of Danfoss expansion valves. (see
below)
One analog input is available as feed back from ICM in order to
indicate Opening degreee of the ICM.
Expansions valve
Two types of Danfoss expansion valves can be used
ICM - ICM are direct operated motorized valves driven by digital
stepper motor type ICAD
AKV/A - AKVA or AKV are pulse-width modulating expansion
valves.
Functions
• Liquid level control
• Alarm if the set alarm limits are exceeded
• Relay outputs for upper and lower level limits and for alarm level
• Analog input signal which can displace the reference
• PI control
• Low or High side control
• When AKV/A is selected, a MASTER/SLAVE system can run up to
3 AKV/A with distributed Opening Degree
• Manual control of output
• Limitation of Opening degree possible
• ON/OFF operation with hysteresis
Liquid level control
EKC 347
EKC 347
Application
The controller is used for regulation of the refrigerant level in:
• Pump reservoirs
• Separators
• Intermediate coolers
• Economisers
• Condensers
• Receivers
LED's on front panel
Opening signal to valve
Indication of upper level limit
Indication of lower level limit
Indication of alarm level
All