Manual EKC 315A Industrial Evaporator Controller
© Danfoss USCO (HMR_MKS), 04-2008 USCO.PD.RD0.A1.22 /521U0092 11
2.13 in
(54 mm)
1.77 in
(45 mm)
2.84 in
(72 mm)
3.54 in
(90 mm)
Mounting: DIN rail
Enclosure: IP 20 (approximately NEMA 1)
Weight: 0.66 lbs (300 g)
Display: LED, 3 digits
Terminals: Maximum 2.5 mm
2
multicore
Technical Data
The supply voltage is galvanically isolated from the input and output
signals, but the input and output signals are not galvanically isolated
from each other.
Supply voltage
24 V ac ± 15%, 50-60 Hz
80 VA maximum (5 VA for controller and additional 55 VA when the
controllers powers the coil for an AKV/A pulse valve or an additional
75 VA when used with the discontinued TQ valve).
Input signals
Current input signal on terminals 18 & 19, 4-20 mA or 0-20 mA
Pressure transmitter, 4-20 mA from AKS 33
Digital input on terminals 1 and 2 for start-stop of regulation
Temperature sensor input, 2 PT 1000
Analog output (terminals 2 and 5)
Current signal: 4-20 mA or 0-20 mA
Load: 200Ω maximum
2 Relay outputs
each SPST, AC-1/4A resistive or AC-15: 3A inductive
Ambient temperature
During operation: +14°F to 131°F (-10 °C to 55°C)
During transport: -40°F to 158°F (-40°C to 70°C)
Approvals
EU Low Voltage Directive complied and EMC demands re CE-marking
complied with
LVD tested according to EN 60730-1 and EN 60730-2-9
EMC tested according to EN50081-1and EN 50082-2
Service Parameters for Troubleshooting (view only)
Description of parameter Parameter Units*
Current TQ valve’s (discontinued valve) actuator temperature u04 °F or °C
Reference for TQ valve’s (discontinued valve) actuator temperature u05 °F or °C
Analog input current signal (terminals 18 & 19) from PLC, etc. u06 mA
Analog output current signal on terminals 2 & 5 u08 mA
Digital input status. Combination of parameter r12 and terminals 1 & 2 u10 ON-OFF
Ongoing cut-in time for thermostat or duration of last completed cut-in u18 minutes
Temperature of S2 temperature sensor (used for superheat) u20 °F or °C
Current calculated superheat u21 °F or °K
Controller’s superheat reference (target superheat controller is trying to achieve) u22 °F or °K
Valve’s opening degree u24 %
Evaporating pressure based on pressure transmitter u25 psig or bar
Evaporating temperature based on pressure transmitter and selected refrigerant u26 °F or °C
Temperature of S3 temperature sensor (used for thermostat function for solenoid valve) u27 °F or °C
Control reference (setpoint + any offset provided by an input signal from a PLC or other
source)
u28 °F or °C
Pressure transmitter current signal (terminals 14 & 15) u29 mA
* The displayed units will depend on the units setting parameter r05.
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