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Compressor racks controller

XC642C

Operating manual

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Summary of Contents for XC642C

Page 1: ...Compressor racks controller XC642C Operating manual...

Page 2: ...UNNING HOURS OF LOADS _______________________________________________ 8 8 1 How to display the running hours of a load ____________________________________________ 8 8 2 How to reset the running hours...

Page 3: ...enance Fit the probe where it is not accessible by the End User The instrument must not be opened In case of failure or faulty operation send the instrument back to the distributor or to Dixell S p a...

Page 4: ...1 use the parameter PA04 Adjustment of read out corresponding to 4mA PA20 Adjustment of read out corresponding to 20mA Practically these parameters has to be set with the start and end scale of the p...

Page 5: ...nt in programming mode it selects a parameter or confirm an operation Alarm menu By holding it pressed for 3s the current alarm is erased o o o o UP To enter the Alarm menu In programming mode it brow...

Page 6: ...How to see and modify the set point 5 1 HOW TO SEE THE SET POINT OF COMPRESSORS 1 Push and release the SET key 2 The Lower display will show the SEtC label will the Upper display will show its value...

Page 7: ...key 5 Repeat operations 2 and 3 for the other digits NOTE each parameter in Pr2 can be removed or put into Pr1 user level by pressing SET n n n n When a parameter is present also in Pr1 decimal point...

Page 8: ...rs of the first output 3 To see the running hours of the following load press the UP key To exit push the CLOCK key or wait 30 sec 8 2 HOW TO RESET THE RUNNING HOURS OF A LOAD 1 Display the running ho...

Page 9: ...T KEY DOWNLOAD 1 Turn OFF the instrument 2 Insert a programmed Hot Key into the 5 PIN receptacle and then turn the Controller ON 3 Automatically the parameter list of the Hot Key is downloaded into th...

Page 10: ...f sequence YES rotation this algorithm distributes the working time between the various loads to ensure even run times no fixed sequence the compressors are enabled and disabled in fixed sequence firs...

Page 11: ...min res 10s doF Time delay between switching off of two different compressors 0 99 5 min res 10s donF Minimum time a stage stays switched ON 0 99 5 min res 10s FdLy don delay enabled also for the firs...

Page 12: ...ON OFF enabling from keyboard no disabled yES enabled It permits the switching ON OFF of the instrument by pressing the SET key for more than 4s Ad1 Compressors address 1 247 It is used in monitoring...

Page 13: ...ts If the pressure is greater than SET Pbd 2 the loads are switching on with timing given by parameters don and doF A load is turned on only if the his safety times onon oFon donF are over Regulation...

Page 14: ...rature is lower than the regulation band all the compressors are off Naturally also for this regulations all the delays don and doF safety times onon oFon and donF are valid Regulation according to th...

Page 15: ...erminal blocks for wires having section not bigger than 1 0 mm2 14 ways for analogue and digital inputs 12 ways for relays Note terminals 17 19 are connected inside the controller they are the common...

Page 16: ...ting in a 29x71 mm panel cut out Protection IP65 Frontal protection IP65 with frontal gasket mod RG C model Connections Removable terminal block 12 and 14 ways Power supply 12Vac dc 10 24Vac dc 10 50...

Page 17: ...suction and condensing sections Terminals Low pressure switch input 9 10 high pressure switch input HP Parameters SEP Low pressure switch polarity It establishes if the input is activated by closing S...

Page 18: ...ow pressure temperature alarms This alarm signals that the pressure temperature is out of limits established by parameters LAL and HAL for compressors and LAF HAF for fans The tAo and AFd parameters s...

Page 19: ...isabled Recovery depends on ALMr parameter With ALMr no The instrument restart the standard operating mode when the input is disabled With ALMr yES manual recover for the alarms of compressors and fan...

Page 20: ...7 134 717 rtY db db db db Pr2 Type of regulation db Pb StY yES yES yES yES Pr2 Compressor rotation no YES Pbc Cur Cur Cur Cur Pr2 Probe 1 setting cur Ptc ntc PA04 0 5 7 0 5 7 Pr2 Adjustment of read ou...

Page 21: ...point for cooling thermostat Lid 10 18 10 18 Pr2 Differential for cooling thermostat PAo 30 30 30 30 Pr2 Alarm probe exclusion at power on 0 255 min LAL 15 0 30 1 5 21 Pr1 Low pressure temperature ala...

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