Danfoss EKC 312 User Manual Download Page 3

© Danfoss A/S (DCS-IMCGPD/sw), 2015-03    

 

 

DKRCC.PS.R1.A3.02 / 520H9752 

 

3

Manual 

Electronic superheat controller, type EKC 312

Operation

Superheat function

 

y

Adaptive superheat 

MOP

The MOP function limits the valve’s opening degree as long as the 

evaporating pressure is higher than the set MOP value.

External start/stop of regulation

The controller can be started and stopped externally via a contact 

function connected to input terminals 1 and 2. Regulation is 

stopped when the connection is interrupted. The function must be 

used when the compressor is stopped. The controller then closes 

the solenoid valve so that the evaporator is not charged with 

refrigerant.

Alarm relay

The relay for the alarm function works in such a way that the 

contact is cut in in alarm situations and when the controller is 

de-energised.

PC operation

The controller can be provided with data communication so that it 

can be connected to other products in the range of ADAP-KOOL® 

refrigeration controls. In this way operation, monitoring and data 

collection can be performed from one PC – either on the spot or in 

a service company.

Summary of Contents for EKC 312

Page 1: ...njection ensures optimum utilisation of the evaporator and hence a high suction pressure y y The superheating is regulated to the lowest possible value User manual Electronic superheat controller Type...

Page 2: ...ve regulation of the refrigerant injection ensures optimum utilisation of the evaporator and hence a high suction pressure y y The superheating is regulated to the lowest possible value Functions y y...

Page 3: ...on is stopped when the connection is interrupted The function must be used when the compressor is stopped The controller then closes the solenoid valve so that the evaporator is not charged with refri...

Page 4: ...umption Controller ETS step motor 5 V A 1 3 V A Input signal Press transmitter 4 20 mA from AKS 33 Digital input from external contact func tion Sensor input 2 pcs Pt1000 ohm Alarm relay 1 pcs SPST AC...

Page 5: ...ification factor Kp If the Kp value is reduced the regulation becomes slower n04 Kp factor I Integration time Tn If the Tn value is increased the regulation becomes slower n05 Tn sec Max value for the...

Page 6: ...e if 2 has been selected Temperature reference if 3 has been selected o17 Display mode Manual control of outputs For service purposes the individual relay outputs and the ETS output can be forced Howe...

Page 7: ...Te Read the temperature at the S4 sensor u27 S4 temp Read value of current signal from pressure transmitter AIB u29 AI B mA DO1 Alarm Read status of alarm relay For Danfoss only Start up time for safe...

Page 8: ...ve s actual opening degree give the lower button a brief push 1s Define view in o17 Reference Units 0 C bar 1 F psig r05 0 1 0 Start stop of refrigeration r12 OFF On 1 Regulating parameters P Amplific...

Page 9: ...tcircuited S2 sensor E17 Cut out S4 sensor E18 Shortcircuited S4 sensor E20 The input signal on terminals 14 15 is outside the range P0 signal A11 Alarm message No refrigerant has been selected A43 Ch...

Page 10: ...are no substitute for normal good engineering practice Danfoss wil not be responsible for any goods or plant components damaged as a result of the above defects It is the installer s responsibility t...

Page 11: ...the regulation 2 Follow the menu survey on page 6 and set the various para meters to the required values 3 Switch on the external switch and regulation will start 4 Follow the actual superheat on the...

Page 12: ...uide for extended operation RC8AC Here you can see how a data communication connection to ADAP KOOL Refrigeration control systems can be established If the distance between EKC 312 and the ETS valve e...

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