Danfoss EKC 312 User Manual
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Danfoss EKC 312 User Manual

Electronic superheat controller
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User manual
Electronic superheat controller
Type EKC 312
Features
DKRCC.PS.R1.A3.02 / 520H9752
y The evaporator is charged optimally – even
when there are great variations of load and
suction pressure.
y Energy savings – the adaptive regulation of
the refrigerant injection ensures optimum
utilisation of the evaporator and hence a high
suction pressure.
The controller and valve can be used where
there are requirements to accurate control of
superheat in connection with refrigeration.
• Processing plant (water chillers)
• Cold store (air coolers)
• A/C plant
y The superheating is regulated to the lowest
possible value.

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Summary of Contents for Danfoss EKC 312

  • Page 1 User manual Electronic superheat controller Type EKC 312 The controller and valve can be used where there are requirements to accurate control of superheat in connection with refrigeration. • Processing plant (water chillers) • Cold store (air coolers) • A/C plant Features y The evaporator is charged optimally –...
  • Page 2 Manual Electronic superheat controller, type EKC 312 Introduction Application The controller and valve can be used where there are requirements to accurate control of superheat in connection with refrigeration. E.g.: y Processing plant (water chillers) y Cold store (air coolers)

  • Page 3: Operation

    Manual Electronic superheat controller, type EKC 312 Operation Superheat function y Adaptive superheat 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.
  • Page 4 Manual Electronic superheat controller, type EKC 312 Data 24 V AC +/-15% 50/60 Hz, 10 V A Supply voltage (the supply voltage is galvanically sepa- rated from the input and output signals) Controller 5 V A Power consumption ETS step motor 1,3 V A Press.

  • Page 5: Survey Of Functions

    Manual Electronic superheat controller, type EKC 312 Survey of functions Function Parameter Parameter by operation via data communication Normal display Normally the superheat is shown (but the valve’s opening degree or SH / OD% / S4 temp air temperature may also be selected. See o17.
  • Page 6 Manual Electronic superheat controller, type EKC 312 Survey of functions Function Parameter Parameter by operation via data communication Miscellaneous Miscellaneous Address If the controller is built into a network with data communication, it must have an address, and the master gateway of the data Following installation of a data communication communication must then know this address.
  • Page 7 Manual Electronic superheat controller, type EKC 312 Survey of functions Function Parameter Parameter by operation via data communication Refrigerant setting Before refrigeration can be started, the refrigerant must be defined. You can select the following refrigerants: 1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13. 7=R13b1.

  • Page 8: Menu Survey

    Manual Electronic superheat controller, type EKC 312 Operation Menu survey Display SW =1.2x The values will be shown with three digits, and with a setting you Fac. Function Param. Min. Max. setting can determine whether the temperature are to be shown in °C or Normal display in °F.
  • Page 9 Manual Electronic superheat controller, type EKC 312 Menu survey Fac. The controller can give the following messages Function Param. Min. Max. setting Fault in controller Manual control of the valve’s opening degree. Cut-out S2 sensor The function can only be operated if ”o18” has...

  • Page 10: Installation Considerations

    Electronic controls are no substitute for normal, to controllers in the event of compressor stoppage, and to the good engineering practice. requirement for suction line accumulators. Your local Danfoss agent will be pleased to assist with further advice, etc. Appendix 1 Appendix 2...
  • Page 11 – e.g. for earlier superheat is required. installations with a Danfoss controller. For a start the values The regulation algorithm necessitates the mounting of a for Kp, and Tn can be set to values corresponding to the earlier temperature sensor in the media.

  • Page 12: List Of Literature

    Electronic superheat controller, type EKC 312 ETS connection If the distance between EKC 312 and the ETS valve exceeds 5 m a filter must be mounted to obtain the correct valve function. The filter must be placed close to EKC 312.

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