User Guide | Interface, EKC 366
© Danfoss | DCS (ADAP-KOOL®) | 2015-11
DKRCI.PS.RP0.C1.02 | 2
The controller must always be used in conjunction with a pilot
valve of the types shown here.
The most commonly used one is pilot valve CVQ in conjunction
with main valve PM3 (sketched out above).
Valve types:
- CVQ + PM
- KVQ
- TQ
- PHTQ
- TEAQ
- CVMQ
Function
The valve constantly receives feedback of the pressure in the
evaporator. Whatever the variations in the suction pressure from
the compressor, this feedback will produce the result that the
evaporating pressure is kept constant.
In conjunction with the controller, an electronic constant-pressure
valve is thus obtained.
Inserted between the controller and the actuator is a so-called
inner regulating loop. This loop will - via an NTC resistance - con-
stantly control the temperature in the actuator.
In an application where a PLC or similar device is used for regulat-
ing a media temperature, the regulating system will in this way be
supplied with an outer regulating loop - which will result in great
regulating accuracy.
System
"Q valve"
PLC
