Related Manuals for Danfoss EKC 316A
Summary of Contents for Danfoss EKC 316A
- Page 1 Controller for operation of evaporator on water chiller EKC 316A Reference manual REFRIGERATION AND AIR CONDITIONING...
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Page 2: Table Of Contents
References ................15 Installation Data communication The EKC 316A is normally mounted on a DIN rail, and the neces- sary connections are shown in the diagram. If the sensor S3 is not used to measure air temperature in connection with thermostat function or as part of the controlling loop, then it is not necessary to connect the S3 sensor. -
Page 3: Installation
The maximum length of cable between EKC 316A and the ETS To ETS Valve Filter valve is five meters. If cable lengths are in excess of this value then it is recommended to use an inductive filter. AKS 33 Pressure transmitter connected to two EKC 316A... -
Page 4: Settings And Checks To Be Made Before Start
Setting and checks to be made before start Basic Settings Before using the EKC 316A controller, there are settings that have to be made for each individual application. These are the refrigerant type, the pressure transducer range and the total number of steps for the ETS valve. - Page 5 2=Compensation takes place when the valve closes These parameters should not be changed and the reason the parameters are accessible is only historical, and at some point will be withdrawn from the menu. EKC 316A Reference manual RS8ED102 © Danfoss 03-2006...
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Page 6: Finding The Optimum Settings
More less the same behaviour will continue as shown where the operation is attempting to find the minimum stable superheat. When using this form of control, there are three settings that have major affect on this mode of control Reference manual RS8ED102 © Danfoss 03-2006 EKC 316A... -
Page 7: Problems Of Start Up
The setting parameters are called Start OD% (n17) and StartUp time (n15), and are found in the For Danfoss only menu in AKM and also in the EKC 316A controller. Please observe that the Start OD% is a minimum value after start... -
Page 8: Types Of Regulation
Types of regulation Single Loop (address o56 Reg.type = 1) The EKC 316A has the traditional PI controlling function with the Kp factor for Proportional Gain and Tn for Integration Time in se- conds. This also is known as the Single loop control with only one PI block as shown in the diagram below. - Page 9 Tn sec KpT0 TnT0 sec If the superheat is unstable, the KpT0 parameter should be slightly reduced. The value parameter Kp factor is not large so little is gain by reducing this parameter. EKC 316A Reference manual RS8ED102 © Danfoss 03-2006...
- Page 10 From the experience of using single loop and double regulation, the following recommendations are given for the applications that EKC 316A has been used in. These are only recommendations and the final choice is made by the end user. Application Reg.
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Page 11: Manually Operating The Valve
Manually operating the valve There are three modes for operating the valve manually and are described in the following sections. Operating the valve manually from the EKC 316A con- troller The opening degree of the ETS can be operated manually by... - Page 12 The diagram is a simplified form of the EKC 316A algorithm, where sections (1) and (2) have been added in connection with modifications made in software version 1.24. Sections (1) and (2) are active when parameter o10 is set to 5...
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Page 13: Battery Back-Up
Superheat reference set too low Increase the value of SH min The S2 sensor not in good contact with the Ensure that S2 sensor is secured on suction suction line line. Insulate sensor. EKC 316A Reference manual RS8ED102 © Danfoss 03-2006... -
Page 14: Alarms
3) The alarm E17 and E18 will be only active if the Therm.Mode ad- dress r14 is set to 1 or Reg.type address o56 is set to 3. 4) The battery alarm A44 is only active when Batt.alarm address A34 is set to ON. Reference manual RS8ED102 © Danfoss 03-2006 EKC 316A... -
Page 15: References
References Controller for operation of evaporator on water chillers EKC316A Manual RS8CX502. Electrically operated expansion valves type ETS ETS Technical Leaflet DKRCC.PD.VD1.A1.02 (tidligere RD1TA302) EKC 316A Reference manual RS8ED102 © Danfoss 03-2006... - Page 16 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss 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 specifications already agreed.