Related Manuals for Danfoss AK2-SC 255
Summary of Contents for Danfoss AK2-SC 255
- Page 1 AK2-SC 255 Rack Controller System Reference Manual RS.8D.M2.22 AK2-SC 255 Reference Manual...
- Page 2 RS.8D.M2.22 AK2-SC 255 Reference Manual...
- Page 3 AK2-SC 255 and earlier 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 electronics section. DISCLAIMER...
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Page 4: Table Of Contents
............................. 12 Selection of units and languages ......................... 12 Configuring Refrigeration ..................... 13 - 63 Starting with a partially configured AK2-SC 255 ..................13 Starting with a completely un-configured AK2-SC 255 ................14 Navigation and making changes ........................14 Entering numerals ............................. 14 Entering labels ............................. - Page 5 Fan configuration, Seasons 4 Smart Coil....................94 Cooling configuration, Seasons 4 Smart Coil.................. 95 - 96 Heating configuration, Seasons 4 Smart Coil ................. 96 - 97 Dehumidification configuration, Seasons 4 Smart Coil..............98 - 99 RS.8D.M2.22 AK2-SC 255 Reference Manual...
- Page 6 Sensor inputs (analog inputs), ClimaTECH ................ 106 - 107 On-off inputs (digital inputs), ClimaTECH ................107 - 108 Address and Initialization, ClimaTECH ..................108 Uploading ClimaTECH configuration to the AK2-SC 255 ..........108 - 109 1.4 Lighting Configuration ....................110 - 114 Beginning configuration ..........................110 AK2-SC 255 lighting zone setup ......................
- Page 7 AK2-SC 255 circuits ........................130 - 131 AKC 164 circuits ........................131 - 132 1.6 Configuring Alarms (continued) ................121 - 132 EKCK, DCU, and Degree Master circuits ..................132 AKC 165 subcooling circuits....................... 132 Condenser alarms ........................... 133 “Other” rack alarms ..........................134 Configuring Bitzer rack alarms ......................
- Page 8 The Cleared Alarms screen ........................195 The Alarm Status screen ........................195 - 196 The Network Alarms screen ........................196 The Alarm Service screen ....................... 196 - 197 Overrides ......................198 - 200 Overrides using service screens ......................198-199 RS.8D.M2.22 AK2-SC 255 Reference Manual...
- Page 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 Using the Audit Trail ....................200 - 202 RS.8D.M2.22 AK2-SC 255 Reference Manual...
- Page 10 RS.8D.M2.22 AK2-SC 255 Reference Manual...
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Page 11: Part One Configuration
PART ONE Configuration 1 - 1. Initial Configuration Note: We use the formal type designation “AK2-SC 255” occasionally in this manual, but ” most often you will see the short form of the name: “SC 255. Configuration of an AK2-SC 255 is easy using the keypad and display, and even easier using Danfoss AKA 65 Network Interface software running opn a PC con- nected to the controller. -
Page 12: Using Menus
°F or °C for temperature; and either % or fc (footcandles) for light level. RS.8D.M2.22 AK2-SC 255 Reference Manual... -
Page 13: Configuring Refrigeration
Partially Configured AK2-SC 255 If the AK2-SC 255 you are working with was supplied with a rack, the controller 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). -
Page 14: Starting With A Completely Un-Configured Ak2-Sc 255
The No of suction groups field is also constrained. It will only accept a single numeric character from 0 to 5, because a single AK2-SC 255 can control up to 5 suction RS.8D.M2.22... -
Page 15: Configuring Rack Info
0 will cause deletion of all existing rack information. Refrig type (List box) The kind of refrigerant. Oil type (9 characters, not constrained) Monitor phase loss (List box: Yes, No) Whether or not there will be a RS.8D.M2.22 AK2-SC 255 Reference Manual... -
Page 16: Adding A Rack
To configure a suction group, press MENU to return to the Main Menu, then select Configuration, then Refrigeration. The Rack Configuration screen appears as at left above. Select the rack and a Configure Rack menu appears (as at left below) . RS.8D.M2.22 AK2-SC 255 Reference Manual... - Page 17 Low Temp PSIG target (-50.0 to 500.0) The pressure that the controller will maintain, subject to capabilities of mechanical equip- RS.8D.M2.22 AK2-SC 255 Reference Manual...
- Page 18 Adaptive suction control (List box) None: No adaptive suction control. AK2-SC 255: Target pressure is adjusted based on discharge temperature of a single fixture. AKC 16x: Adaptive control of individual evaporators by an AKC 164 or AKC 161 Smart Case Controller.
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Page 19: Configuring Two-Stage Systems
(0 to 45) Number of seconds after suction pressure reaches target + the number specified in the preceding field that AKV valves will be closed. Rack on AK2-SC 255 address (0 to 15) The address of the SC 255 controlling the rack that serves these EEVs. -
Page 20: Configuring Compressors
Desuperheating temp (-50.0 to 200.0) Range +/- (1.0 TO 10.0) Configuring compressors To begin configuring compressors, select Compressors from the Configure Rack menu. The first page of the screen looks like this: RS.8D.M2.22 AK2-SC 255 Reference Manual...