Specifications

30 RK0YG302 © Danfoss 05/2007
EKC 319A
Application
The controller limits the pressure gas temperature in compressors
by opening up for liquid injection in the suction line.
Control
A temperature sensor will register the discharge gas temperature.
If the temperature reaches the set temperature value, opening of
the valve will be commenced.
A PI regulation will adapt the opening degree of the valve so that
the temperature will be limited.
Temperature sensor
Type AKS 21 can be used. It can stand the high temperature.
Valve
If the liquid injection is carried out directly in the suction line an
expansion valve type AKV, or a type AKVA (for NH
3
), is used. The
capacity requirement is determined by the size of the valve. If the
compressor is provided with a connection for liquid injection a
pulse solenoid valve type EVRP is used in the liquid supply.
Alarm function
The controller will sound an alarm if the set alarm limit is ex-
ceeded.
The alarm will activate the alarm relay.
Liquid injection in the suction line
EKC 319A