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Digi-Cool Industries Ltd.

Digital Refrigeration System Analyzer

Distributed By:

AK900

User manual

To take full advantage of your analyzer, please read this manual

and store in a safe place for future reference.

v1.04

Summary of Contents for DIGI COOL

Page 1: ...Cool Industries Ltd Digital Refrigeration System Analyzer Distributed By AK900 User manual To take full advantage of your analyzer please read this manual and store in a safe place for future reference v1 04 ...

Page 2: ...essure Recall Modes 16 Using Temperature Modes 16 Specifications 19 Care Maintenance 20 General Care 20 Replacing Batteries 20 Cleaning 21 Maintenance 21 Calibration 22 Troubleshooting 23 End of Life Disposal 26 Warranty 27 Limitation of Liability 29 Service and Support 31 Refrigerant Expansion 31 Contact Information 31 Return for Service 32 Product Regulatory Information 36 ...

Page 3: ...ntents 1 Digi Cool AK900 Digital Refrigeration System Analyzer Unit 1 9V battery installed 1 Dual Temperature Sensor 1 Extended Hanging Hook 1 Two valve ball valve manifold 1 User Manual 1 Product Registration Card ...

Page 4: ...ed pressure and temperature for the selected refrigerant Displays maximum and minimum pressures observed since threshold reset The unit has two 1 8 pressure ports acting as two gauges blue for low side red for high side All settings are controlled through the keypad and affect both sides of the display Some features of the unit include Working pressure ranges Low side 0 200psia 1350 kPa 13 5 bar H...

Page 5: ...y contrast Selectable reading update rates of 1 and 5 seconds or hold current reading Upgradeable to handle additional refrigerants Automatic shutdown after 15 minutes of inactivity Low battery indicator Tough weather resistant case for indoor outdoor field use Features of the unit are patented in the US 5 311 745 and Canada 2 107 134 by Digi Cool Industries Ltd This unit is intended for use in an...

Page 6: ...d for the operational pressures of the analyzer at up to 550psia 3000 kPa 37 9 bars To prevent damage never exceed the proof pressure of the analyzer Low side 600psia 4100 kPa 41 bars High side 1500psia 10300 kPa 103 bars For safe operation ensure that the refrigeration system under test has working overpressure relief equipment installed and that they are rated to trigger below the burst pressure...

Page 7: ...Tactile response keypad is easy to operate even with gloved hands 3 Transducer Ports 1 8 NPT ports connect to the gauge ports of the manifold using supplied straight swivel fittings 4 Temperature Probe Plug Connect the temperature probe to this port When not in use cover the plug with the sealing cap to maintain water resistance ...

Page 8: ...e connector align the key on the plug with the slot on the connector Push connector while wiggling to mate together and then tighten the thread on the black collar to lock connector into place When not in use apply the attached cover to the connector to keep moisture and dirt out The probe comes with a 10 3m long cord Display The display of the unit is very user friendly For users familiar with tr...

Page 9: ...has exceeded the working pressure range of the gauge or The pressure detected far exceeds the proper operating range for the selected refrigerant resulting in out of range temperature readings This may be caused by improper use of the ZERO key or if the working pressure range has been exceeded Try depressurizing the manifold and press ZERO to recalibrate to a proper atmospheric reference Also ensu...

Page 10: ...rs of change in the high side reading The hash marks above the bar graph show these units for quick reference Segments on the left of the center mark mean decreased pressure while segments on the right indicate increased pressure 3 Pressure The numeric pressure display is below the bar graph The low side pressure is shown in 0 1 PSI 1 kPa 0 01 bar the high side is shown in PSI kPa 0 1 bar When ope...

Page 11: ... R236fa R 236fa R245ca R 245ca R245fa R 245fa R290 290 R 290 Propane R401A 39 MP39 R401B 66 MP66 R402A 80 HP80 R402B 81 HP81 R404A 62 HP62 FX 70 R406A 406A 406A GHG12 R407A 407A 407A R407C 9000 Suva 9000 R408A 10 FX 10 R409A 56 FX 56 R410A 20 AZ 20 R413A 49 R414B 414B HotShot R416A 416A FRIGC FR 12 R417A 59 ISCEON 59 R420A 420A 420A R421A 421A Choice R421A R421B 421B Choice R421B R422A 79 ISCEON 7...

Page 12: ...re these refrigerants are not included with the unit Contact the manufacturer if you wish to upgrade your unit to handle these or other refrigerants 6 Hold Time These indicators show how often the digital readings are being updated The 1SEC indicator shows that it is updated once every second The 5SEC indicator means the digits are updated once every 5 seconds The HOLD indicator means the digits a...

Page 13: ... reading When the MODE key is toggled the dt will then disappear and either the HI or LO will appear to HI Maximum pressure recall mode pressure fields display highest pressures sensed since threshold reset and their associated saturation temperatures In this mode the 15 min automatic shutdown is disabled LO Minimum pressure recall mode pressure fields display lowest pressures sensed since thresho...

Page 14: ...e the unit Regardless of what pressures the low and high side are sampling at the time that this key is pressed these pressures will then be considered the 0 or atmospheric pressure reference reading For best accuracy allow unit to reach ambient temperature before pressing ZERO UNIT This key toggles the pressure and the temperature readings through the following combinations of pressure units in s...

Page 15: ...ically 4 times per second At the moment that the numeric readout is updated the bar graph will clear itself In this way the bar graph indicates the current deviation from the displayed numeric reading LCD é ê These keys increase and decrease the contrast of the LCD display respectively MIN MAX CLR This key clears the memory of the HI and LO pressure recall modes Depress this when you wish to begin...

Page 16: ...owest pressures are shown To begin observing pressure fluctuations press the MIN MAX CLR key If not in HI or LO mode the display will not show any changes but the threshold memory has been updated to the current pressure readings When in HI or LO modes the dynamic update bar graphs is inactive 15 minute automatic shutdown is also disabled to allow continuous monitoring of pressure Be sure to turn ...

Page 17: ...ion line Ensure the correct refrigerant is selected If the system is operating properly superheat should be between 10 to 30 F 5 to 15 C while the compressor is operating steady state If superheat is negative the compressor may be drawing some liquid SC mode The subcooling mode is useful to verify full condensation Some systems required subcooling for proper operation refer to the equipment specif...

Page 18: ...hoses open to atmosphere In order to go back to the factory settings select o F psig and again press and hold down the zero key for 4 seconds Dual Temperature Sensors and Delta T The last feature enhancement is the dual temperature sensor assembly and the ability to switch not only back and forth between SH and SC but to read a dt or delta temperature as the blue lead SC sensor temperature is subt...

Page 19: ... 1500psia 10300 kPa 103 bars Burst pressure Tolerable pressure without lost of seal Low side 2000psia 13500 kPa 135 bars High side 5000psia 34500 kPa 345 bars Temperature sensor range 40 to 250 F 40 to 125 C Temperature accuracy 0 9 F 0 5 C between 32 to 158 F 0 to 70 C Dimension 7 3 x 4 9 x 2 6 18 5 x 12 5 x 6 5cm Weight with batteries 1 6 lb 720g Battery life approx 6 months with normal use Usag...

Page 20: ...t is designed for use with a 9V alkaline battery Carefully follow all instructions and warnings on the battery label and package 1 Find a dry environment preferably at room temperature or lower This will keep condensation from forming in the unit at a later time Air conditioned rooms are ideal 2 Remove the rubber boot if installed by stretching it and shifting it toward the front of the analyzer 3...

Page 21: ...s can be recycled Cleaning Do not use harsh acids or bases to clean the unit To clean the unit wipe with a damp cloth and a warm solution of soap and water Do not immerse the unit under water Maintenance Check the connections between the pressure port and your service manifold periodically As the unit is exposed to heat and cold the connections may loosen Retighten if necessary If the pressure por...

Page 22: ...e accuracy of the calibration is traceable to the U S National Institute of Standards and Technology NIST The measurements will perform within the specified accuracy over its life No calibration is necessary If the unit gives erroneous readings please return to the manufacturer for service ...

Page 23: ...arity of batteries Follow the battery replacement procedures If any batteries were left installed in reverse for some time they may be drained Remove the old set wait 30 seconds and install a fresh set If the unit is hot to the touch allow unit to cool and try again Strange characters or patterns seen on display Press 1SEC 5SEC HOLD to exit from any test mode displays entered accidentally Press PW...

Page 24: ...lay flashes You may be exceeding the 200psia and 550psia working ranges or selected a refrigerant unsuitable for the current pressure reading Disconnect pressure connection to system press ZERO to recalibrate ...

Page 25: ...tact the manufacturer for service Pressure port loose against case Tighten the speed nut using a deep socket or wrench Do not use excessive force Apply thread lock if desired Mode changes randomly without MODE key press When the temperature probe is installed it automatically enters t sh sc modes When the temperature probe is removed it automatically enters normal mode Check that the temperature p...

Page 26: ...tries supports the proper disposal of this product at the end of its service life New companies and initiatives to collect electronic products for disposal are underway around the world Please contact your local waste disposal agency or visit the following Internet sites for more information USA Environmental Protection Agency http www epa gov Electronics Recycling Resources http www electronicsre...

Page 27: ...ery electrolyte Remove batteries from the unit if it will not be used for some time Included refrigerant information is based on data from the U S National Institute of Standards and Technology NIST as expressed by the REFPROP program standard reference database 23 version 7 0 Digi Cool does not guarantee the complete accuracy of encoded refrigerant properties users are advised to use due diligenc...

Page 28: ...in unit Digi Cool may elect to service or replace the accessory only or reimburse the value of the accessory Before returning the unit for service please remove all attachments and accessories not originally supplied with the analyzer such as service manifolds How To Get Service In order to be eligible for service under this warranty you MUST register your purchase by returning the registration ca...

Page 29: ... Cool or without Digi Cool consent or approval Limitation of Liability TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW DIGI COOL SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES AND UNDER NO LEGAL THEORY WHETHER IN TORT CONTRACT OR OTHERWISE TO YOU OR ANY OTHER PERSON FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL CONSEQUENTIAL OR PUNITIVE DAMAGES OF ANY KIND INCLUDING BUT NOT LIMITED TO DAMAGES FOR LOST...

Page 30: ...rence to any rules of conflict of laws The Courts of British Columbia will have jurisdiction over all claims disputes and actions related to or arising from or out of or in connection with the warranty and the purchased product and Digi Cool and all purchasers hereby irrevocably attorn to the jurisdiction of those courts ...

Page 31: ...uest rapid replacement service for an additional fee We will ship you a replacement unit within 2 business days after which you can return the defective unit to us Before returning the unit for service please remove all attachments and accessories not originally supplied with the analyzer Refrigerant Expansion The unit is upgradeable to support new refrigerants Please visit our Internet site or co...

Page 32: ...32 Return for Service Please contact us before you return your unit for servicing Include the following information with your package Return Authorization Number Detailed Description of the Problem ...

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