Manual
EKC 315A Industrial Evaporator Controller
© Danfoss USCO (HMR_MKS), 04-2008
USCO.PD.RD0.A1.22 /521U0092
7
Description of setting
Parameter Minimum Maximum Factory
setting
Field
setting
Setpoint for thermostat function for controlling a liquid line solenoid valve
Not used for superheat function. Used only for thermostat function.
Regulation is based on this user-set value unless there is a displacement of
setpoint by an analog signal (see parameter 010).
This setting is not changed by entering the parameter list, but by pushing both
buttons simultaneously, then using the buttons individually to adjust the setpoint
up and down (see the section “Operating the EKC 315A.”)
-
-76°F
(-60°C)
122°F
(50°C)
50°F
(10°C)
Differential for thermostat function
When temperature is higher than reference plus this user-set differential,
the solenoid valve’s relay will be energized. It will be de-energized when the
temperature drops below the setpoint.
r01
0.2°F
(0.1°K)
36°F
(20°K)
3.6°F
(2.0°K)
Units
Setting 0: °C and bar
Setting 1: °F and psig
r05
C - b
(0)
F- P
(1)
C - b
(0)
Maximum displacement of thermostat setting or superheat reference
by an analog signal from a PLC or other external device. Determines how great
a displacement will be added when the input signal is maximum (20 mA). (See
parameter o10.)
r06
-90°F
(- 50°K)
90°F
(50°K)
0°F
(0°K)
Offset of temperature sensor S2 signal
To calibrate the sensor reading, or to compensate, for example, for loss due to a
long sensor cable.
r09
-18°F
(-10°K)
18°F
(10°K)
0°F
(0°K)
Offset of temperature sensor S3 signal
To calibrate the sensor reading, or to compensate, for example, for loss due to a
long sensor cable.
r10
-18°F
(-10°K)
18°F
(10°K)
0°F
(0°K)
Start-stop of refrigeration
Using this setting, refrigeration can be started or stopped. Start and stop can also
be accomplished with the external switch function on terminals 1 & 2 (see wiring
section).
r12
0 (OFF)
1 (ON)
1
Thermostat function for controlling a liquid line solenoid valve
0: No thermostat function. Only superheat is regulated.
1: Thermostat function enabled in addition to superheat regulation.
r14
0 (OFF)
1 (ON)
0 (OFF)
Survey of functions, settings, and parameters
Regulating settings
Alarm for high temperature (sensor S3).
When S3 temperature exceeds reference plus this differential temperature setting,
the alarm is activated. Note that there may be an alarm delay (A03). Reference can
be seen in u28.
A01
5.4°F
(3°K)
36°F
(20°K)
9°F
(5.0°K)
Alarm for low temperature (sensor S3).
When S3 temperature is lower than reference minus this differential temperature
setting, the alarm is activated. Note that there may be an alarm delay (A03).
Reference can be seen in u28.
A02
1.8°F
(1°K)
18°F
(10°K)
5.4°F
(3.0°K)
Alarm delay
If this parameter is set, a timer is activated when one of the two alarm settings is
exceeded. The alarm is generated only after the time delay has passed.
A03
0 (min.)
90 (min.)
30
(min.)
Alarms
The controller is capable of generating alarms. When there is an alarm, the three lower
LEDs on the front panel will flash and the alarm relay will cut in.
