Danfoss EKC 361 User Manual page 3

Application examples
ICS/PM
ISC/PM with CVQ is a pilot-operated and pressure-dependent
valve for for controlling media temperature.
The ICS or PM must be equipped with a CVQ pilot valve in order
to position ICS or PM. The CVQ valve is operated by the EKC 361
controller.
Please notice that a power failure will cause the CVQ pilot valve to
fully open ICS/PM. If it is required that ICS/PM must close at power
failure, the pilot valve type EVM-NC can be installed.
If the Digital Input is ON, it releases the ICS/PM for controlling
temperature. If the Digital Input is OFF, if stops controlling PM/ICS,
but EKC 361 will maintain a CVQ mimimum temperature. (Param-
eter n02)
Please see seperate literature for ICS/PM
ICS : RD4YA
PM : RD4XA
ICM
ICM is a direct activating and pressure independent valve for con-
trolling media temperature.
When ICM is selected, the ICM is positioned directly via the analog
output 0/4-20mA output from the EKC 361.
If the Digital Input is ON, it releases the ICM for controlling tem-
perature. If the Digital Input is OFF, the ICM is forced to close.
The opening degree OD 0-100 % can be limited by parameter n32
and n33.
Please see seperate literature for ICM
ICM : RD4YB
General for ICS/PM and ICM
The EKC 361 can also operate a solenoid valve in the liquid line
(Digital output on terminal 9 and 10). It will follow the status of
Digital Input, however if a low temperature alarm is detected (A2
alarm) the solenoid valve in the liquid line will be closed.
The EKC 361 can also operate a fan (Digital output on terminal 8
and 10). It will follow the status of Digital Input.
The Parameter (r12) must be ON in order to ensure general opera-
tion. If Parameter (r12) is OFF, EKC 361 will operate corresponding
to if Digital Input is OFF
As media temperature sensor is S
can also be used to control liquid.
As option an auxiliary temperature sensor Saux can be installed
but only for monitoring.
S /S can both be shown as running display value selected by
air aux
parameter o17. The selected sensor (S
out on the Analog Output as 0/4-20 mA.
Temperature scaling with parameter o27 and o28. Please observe
by ICM the Analog Output is not available for sending temperature
signals (S or S ).
air aux
It is normally recommended, on a aircooler, to install S
evaporator air outlet side.
Extra options
• PC operation
The controller can be provided with data communication, so
that it may be hooked up with other products in the ADAP-
KOOL® range of refrigeration controls. Operation, moni toring
and data collection can then be performed from a PC - either in
situ or at a service company.
EKC 361
is used. Please observe that S
air
or S ) will be sent
air aux
, at the
air
Manual RS8AE802 © Danfoss 12-2009
air
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