Danfoss EKC 316A User Manual Download

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REFRIGERATION AND
AIR CONDITIONING

Controller for operation of

evaporator on water chiller

EKC 316A

Reference manual

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Summary of Contents for EKC 316A

Page 1: ...REFRIGERATION AND AIR CONDITIONING Controller for operation of evaporator on water chiller EKC 316A Reference manual...

Page 2: ...an extern analogue signal 11 Operating the valve manually by an extern analogue signal with MOP active 11 Battery back up 13 Troubleshooting 13 Alarms 14 References 15 Installation The EKC 316A is nor...

Page 3: ...following checks can be made to the connec tion between the EKC316A controller and the stepper motor of the ETS valve 1 With the power o check that resistance between terminals 21 and 22 and terminal...

Page 4: ...essor o30 Refrigerant ETS Valve type Each ETS valve has a speci ed number of steps as given below Total steps ETS 50 2625 160 0 steps ETS 100 3530 160 0 steps ETS 250 and 400 3810 160 0 steps The para...

Page 5: ...n more capacity is required NO function n41 Valve type Menu Danfoss only Compensation direction 1 Compensation takes place when the valve opens normal setting 2 Compensation takes place when the valve...

Page 6: ...l opening degree dependant on the Kp factor the measured superheat SH and SH closes as given in the following relationship Initial OD kp factor SH SH close The regulation modes for controlling superhe...

Page 7: ...alve is that there are three settings to de ne the operating curve Problems of start up Sometimes in one to one applications the valve does not open su ciently on start up and troublesome low pressure...

Page 8: ...ontrol Refrigerant Temp S2 Superheat Ref SHref Superheat S2 S1 ETS Valve Evaporator Kp factor and Tn settings Instability cause by too much Proportional Gain can be corrected by reducing to value of t...

Page 9: ...Evaporator ETS Valve PI Control S3 S1 Kp factor and Tn settings KpT0 and Tn T0 settings The feedback of the inner loop is temperature di erence between media temperature S3 and S1 This value represen...

Page 10: ...wer response of the media temperature NOTE The settings Atten factor address n43 and Min Lim Ref address n45 should not be changed without the help of trained sta The S3 sensor has to be connected whe...

Page 11: ...signal connected to terminals 16 and 17 of the controller This can be done by setting parameter o18 to 4 for 0 to 20 mA signal or 5 for 4 to 20 mA signal The analogue input 0 or 4 mA will correspond...

Page 12: ...signal can be used when o10 is set to 6 When the sections 1 and 2 are active the function in section 2 will choose the lowest value of OD that comes from either sections 1 or the PI Control This mean...

Page 13: ...placed much higher than condenser outlet check pressure di er ence Evaporator superheat too high 1 Check superheat performance the set tings SH min and SH max 2 Check valve capacity 3 Check that the...

Page 14: ...terminals 8 9 Low Temperature alarm A2 Check ETS valve is full open and relay at terminals 8 9 No refrigerant selected A11 Select refrigerant Supply to stepper motor A43 Check connections from EKC316A...

Page 15: ...8ED102 Danfoss 03 2006 15 References 1 Controller for operation of evaporator on water chillers EKC316A Manual RS8CX502 2 Electrically operated expansion valves type ETS ETS Technical Lea et DKRCC PD...

Page 16: ...reserves the right to alter its products without notice This also applies to products already on order provided that such alternations can be made without subsequential changes being necessary in spec...

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