Danfoss ADAP-KOOL AK-PC 551 User Manual Download

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Capacity Controller

AK-PC 551

User Guide

ADAP-KOOL® Refrigeration Control System

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Summary of Contents for ADAP-KOOL AK-PC 551

Page 1: ...Capacity Controller AK PC 551 User Guide ADAP KOOL Refrigeration Control System...

Page 2: ...ignal from automatic safety control day night signal etc Relay outputs max 6 pcs Connection of compressors condenser fans Solid state outputs max 2 pcs Control of capacity valve on a Copeland digital...

Page 3: ...ne cut in of the next compressor arrow up is permitted When the pressure is lower than the reference a half neutral zone cut out of a compressor arrow down is permitted When the pressure is within the...

Page 4: ...ing functions Fixed reference Variable reference which follows the outdoor temperature When the outdoor temperature drops the reference will drop by a corresponding amount This variable reference requ...

Page 5: ...am or Bitzer CRII the capacity will be increased so that the compressor can cool down itself The compressors will be stopped if the temperature nears the set max temperature value Sensor failure If la...

Page 6: ...low 1 condenser group 1 suction groupe 2 suction groups 2 suction groups and 1 condenser group Each of the four rows above is continued with three additional displays The arrow in the top corner of th...

Page 7: ...ly None Main Menu The first setting is the Plant type When the Plant type has been selected it will al low several settings to be made For example Continue to the next menus All settings are explained...

Page 8: ...nit of setpoints Device for controlling compressor and condenser Select pressure or saturation temperature Can be set during initial set up and must not be subsequently changed Temp press Fac Saturate...

Page 9: ...atus of the load shed function can be read here Injection ON A The status of the injection ON signal sent to the evaporator controllers can be read here MC Load Shedding The status of the load shed si...

Page 10: ...c Po Compressor mode Set the type of compressor to be used for regulation Multi all All compressors have unloaders Multi Single First compressor has unloaders The remaining ones are one step units Spe...

Page 11: ...d Network The controller sends a signal to the system unit which then forwards it to the evaporator controls Relay The function reserves a relay that pulls in if all compressors are stopped All evapor...

Page 12: ...ssors Suction B Suction group B Please see descriptions under suction group A Bitzer CRII can not be used in suction group B Condenser Control status Regulation status Control status Here you can read...

Page 13: ...Step on off control of fans will be via relays Variable step The signals are parallel so external wiring can switch over to step e g if the frequency converter fails AO demand Step Speed Fac Step No...

Page 14: ...im A Alarm limit for excess superheating Min 20 K Max 80 K Fac 80 K Superheat delay A Delay time before alarm is generated for insufficient or excess superheating Min 0 min Max 60 min Fac 5 min SdA Ma...

Page 15: ...t to thermostat AI demand Yes No Fac No Thermostat cut in Here set the temperature value at which the thermostat will cut in Min 50 C Max 150 C Fac 5 C Thermostat cut out Here set the temperature valu...

Page 16: ...rge gas temperature monitoring an NTC 86K 25 C can also be selected Calibration value 10 C Pressure sensors Signal type 0 20mA 4 20mA AKS32 1 5V or AKS32R 10 90 ratiometric of 5 V supply voltage Minim...

Page 17: ...bration I O Summary DO Max 8 Used __ DI Max 8 Used __ AO Max 2 Used __ AI Max 8 Used __ Inputs and outputs used Here you can see how many of the different inputs and outputs are available You can also...

Page 18: ...A FS 1 3 x 5 4CA FS 4 x 4 4CA 4F 4 4 3 3CSA FS 1 2 x 2 3CA FS 3 x 1 3CA 3 F 3 3 0 None After making a selection the setting will return to None After making a selection you must 1 Set the type of refr...

Page 19: ...1 Fan2 Fan3 Alarm PoA PoB Pc Sc3 C1A C2A C1B CB2 Main Sw Fan safe 10 4CDA FS C1 C2 C3 C4 C1 PWM Fan VSD Alarm Fan Speed PoA Pc Sc3 SdA Digi C1 C2 C3 C4 Main Sw Fan safe 9 3CDA FS C1 C2 C3 C1 PWM Fan V...

Page 20: ...tion groups A and B respectively Fan safety input External main switch start stop HP safety switch LP safety switch for suction groups A and B respectively Night status Heat recovery Load sheeding Ge...

Page 21: ...Low superheat Superheat in suction line A too low measured by PoA and SsA SdA High discharge temp Safety prevention limit for SdA discharge temperature has been exceeded 10K below safety limit High di...

Page 22: ...newer Once the display s software version has been checked check the display s settings as follows 1 Hold the Enter key and the X key down for 5 seconds until the Bios menu appears 2 Select the MCX se...

Page 23: ...pply Avoid earth fault current Use double insulated transformer The secondary side must not be earthed Obtain 0 10 volts from terminals N and AO3 respectively N and AO4 PAY ATTENTION TO THE POLARITY o...

Page 24: ...r capacity is distributed by up to 50 for one relay and the remaining 50 100 for the unloader The unloader is con nected to DO5 or DO6 Injection off The electronic expansion valves in the cooling appl...

Page 25: ...5 4 A inductive 2 pcs SPST 16A AC 1 10 A ohmic AC 15 3 5 inductive 2 pcs Solid State PWM for scroll unload Imax 0 5A Imin 50 mA Leak 1 5 mA 2 Voltage output 0 10 V d c Ri 1kohm Separate 24 V supply re...

Page 26: ...hts reserved Installation considerations Accidental damage poor installation or site conditions can give rise to malfunctions of the control system and ultimately lead to a plant breakdown Every possi...

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