Danfoss AK2-SC 255 User Manual Download

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RS.8D.M2.22

AK2-SC 255 Reference Manual

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AK2-SC 255 Rack Controller

System Reference Manual

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Summary of Contents for AK2-SC 255

Page 1: ...RS 8D M2 22 AK2 SC 255 Reference Manual 1 AK2 SC 255 Rack Controller System Reference Manual...

Page 2: ...RS 8D M2 22 AK2 SC 255 Reference Manual 2...

Page 3: ...rlier controllers If you can you should check the Danfoss web site at www acr danfoss com and select the menu item for product literature The AK2 SC 255 literature will be in the Supermarket electroni...

Page 4: ...sors 20 22 Compressor oil and safety information 22 23 Neutral Zone control 23 Compressor capacity staging patterns 24 25 Configuring Evaporators 25 31 Case lights button 27 ConfiguringAK2 SC 255 refr...

Page 5: ...66 69 RTU heating configuration 69 72 RTU dehumidification configuration 73 75 RTU air damper configuration 75 76 RTU alarms configuration 76 RTU board points configuration 76 AHU Configuration 76 80...

Page 6: ...nfiguration 110 114 Beginning configuration 110 AK2 SC 255 lighting zone setup 110 113 Board points configuration lighting 113 Powerlink configuration 113 Cutler Hammer configuration 113 Powerlink and...

Page 7: ...llaneous on off inputs 142 Specifying miscellaneous conversiosn 142 143 Miscellaneous calculations 143 144 Point creation 144 145 Custom strategy example 145 153 Creating the miscellaneous points Sens...

Page 8: ...en Evaporator Alarms screen and Evaporator Service screen 175 2 5 Using the Communications Screens 176 187 Host Network screen 176 I O Network Status screen 176 177 List Points 177 179 List Nodes 179...

Page 9: ...rence Manual 9 Overriding sensor values 199 Overrides using RO8S switches 199 Overrides using the Manager s Override box 199 200 Keyswitch Override for refrigeration high temperature alarms 200 2 9 Us...

Page 10: ...RS 8D M2 22 AK2 SC 255 Reference Manual 10...

Page 11: ...may be limited to such items as are necessary to check out the mechanical equipment or provide basic service The configuration can be changed or added to at any time later Battery The unit s backup ba...

Page 12: ...apter 5 Using the System Using menus To select from any SC 255 menu first use the arrow keys to move the cursor to the item you want then press the ENTER key You can use the EXIT key to retrace your s...

Page 13: ...may have been partially configured by the rack manufacturer In that case when you select Refrigeration from the Main Menu the SC 255 will display the Refrigeration Menu left It lists the rack or racks...

Page 14: ...entries that you need to spell out The Rack label field contains a label one character in length The Oil type field is also a label field but it is 9 characters long allowing you to spell out a word...

Page 15: ...the list box s cursor on the selection you want press ENTER to save your selection Some list boxes contain only two choices for example Yes and No in the Monitor phase loss field Some may contain many...

Page 16: ...only one way to add a rack From the Main Menu select Configuration then Refrigeration and the Rack Configuration screen appears At the bottom left of the screen are the words Add Rack Move the cursor...

Page 17: ...evealed The fields and their contents are as follows Suction I D 2 label fields the first is a list box A to Z the second is 9 characters not constrained This is the identifica tion you wish to assign...

Page 18: ...t 50 0 to 100 0 The temperature that the adaptive control algorithm will seek to maintain in the fixture Does not appear when dynamic adaptive control is selected Range 0 0 to 100 0 The dead band arou...

Page 19: ...itor desuperheat temp List box Yes No Close EEV valves during rack shutdown List box Yes No If suct above target by 0 to 999 9 Number of psig above target when AKV valves will be closed during rack sh...

Page 20: ...down Control desuperheater List box Yes No Whether or not de superheater control is implemented on this rack Controlling sensor List box Desuper In AA Control is based on a sensor moni toring the liqu...

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