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Summary of Contents for UEi DIGI COOL
- Page 1 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...
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Page 2: Table Of Contents
Table of Contents Table of Contents ................. 2 Package Contents ................. 3 Features and Use .................. 4 General .................... 4 Proper Use ..................6 External Features ................7 Display .................... 8 Keys ....................13 Using the Pressure Gauges ............ -
Page 3: Package Contents
Package Contents 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: Features And Use
Features and Use General The unit performs the following tasks: • Sense and display pressures present in the manifold • Calculate and display dew / bubble points corresponding to the sensed pressures, for the selected refrigerant • Sense and display temperature of probe tip •... - Page 5 • Includes profiles for 45 common refrigerants • "Dynamic Offset" bar graph display • Pipe-mounted temperature probe for automatic superheat and subcooling readings • MAX and MIN pressure monitoring for control set-up • Zero key automatically calibrates to local atmospheric conditions •...
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Page 6: Proper Use
Proper Use This product is intended for use by trained service personnel only, for use with vapor compression refrigeration, air conditioning and heat pump systems. Servicing of refrigeration systems require special training to ensure the safety of the service person, building occupants, local and global environment. -
Page 7: External Features
External Features 1 Display Extended temperature LCD display, protected with clear resilient window to prevent damage. 2 Keypad 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. -
Page 8: Display
5 Vent Allows for atmospheric and internal pressure adjustment without moisture entry. Do not cover this port. 6 Temperature Probe The temperature probe can be secured onto piping from 3/8” to 3” in outer diameter (1 to 7.5cm) with the attached hook-n-loop strap. The connectors are water resistant when mated or when covered by their protective caps. - Page 9 1 Low and High Side In general, displays on the left side of the screen are associated with the low-pressure side of the refrigeration system, represented by the blue labeling. The right side of the display reflects the high-pressure side, represented by the red labeling. The low or high side display will flash when one of the following abnormal pressure conditions occur on each side of the service manifold:...
- Page 10 reading. Given the wide operating range of the analyzer, extremely accurate vacuum readings are intrinsically difficult to achieve. When no pressure unit is indicated, the amounts shown are in bars. 2 Dynamic Offset Bar Graph Each bar graph represents changes to each pressure reading since the digits were updated.
- Page 11 5 Selected Refrigerant The currently selected refrigerant is shown here. The characteristics of the selected refrigerant are reflected in the temperature readings discussed above. ASHRAE Trade # shown Trade # R1234yf R-123 R-124 R134A 134A 134A R236ea R-236ea R236fa R-236fa R245ca R-245ca R245fa...
- Page 12 R427A R-427A R428A R434A RS-45 R437A R438A R500 R502 R507 AZ-50 R508B Suva 95 R600A 600A 600A (Isobutane) If the "R" prefix is visible, the ASHRAE reference number is being shown. If "R" prefix is not visible, the number shown is the numeric portion of the refrigerant's trade name, as shown below.
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Page 13: Keys
9 SuperHeat This character set of the display is the superheat reading, in either °F or °C. If temperature reading lower than the low-side dew point for the selected refrigerant, SH is negative. 10 SuperHeat Temperature (lowside sensor) The is the actual temperature being measured by the Superheat sensor on the line it is mounted on. - Page 14 R- é / ê These keys select between available refrigerants. When the last available refrigerant has been reached, the first one is shown again. If the unit has been upgraded with additional refrigerants, they will be shown following the original refrigerants. Refrigerants are labeled according to their ASHRAE designations or trade numbers.
- Page 15 1SEC / 5SEC / HOLD This key selects the time between updates of the numeric pressure reading and corresponding temperature displays. For example, if the update time selected is 1SEC, the pressure and temperature displays are updated every second. With 5SEC, the display is updated every 5 seconds.
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Page 16: Using The Pressure Gauges
Using the Pressure Gauges Once mounted properly onto a service manifold, the pressure gauges behave just like traditional needle pressure gauges. Usually, the low side of the manifold is connected to the low-side service port, and the high side of the manifold to the high-side service port. Using Pressure Recall Modes The pressure recall modes are useful when setting switching equipment and observing load changes over long periods. - Page 17 Once the temperature probe is connected to the analyzer, the system automatically enters t mode after several seconds. Several operation modes are then available through the MODE key: t mode The temperature of the probe is shown on the lower right, following t. It is in ºF or ºC, depending on the unit selected.
- Page 18 The absolute zero function This gives the 900 the ability to zero the pressure readouts to absolute zero and thus read out accurately in high altitude locations. In order to take advantage of this function you will need to put the 900 into the F/psia mode and then with both the low side and high side connected to a vacuum pump at 100 microns or less (the lower the better);...
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Page 19: Specifications
Specifications Sensing resolution: Low side: 0.25psi (2kPa, 0.02bars) High side: 1psi (7 kPa, 0.07 bars) Sensing accuracy: 0.6% FS ± 1 least significant digit Working pressure: Low side: 0-200psia (1350 kPa, 13.5 bars) High side: 0-550psia (3000 kPa, 37.9 bars) Proof pressure: Tolerable pressure without internal damage Low side: 600psia (4100 kPa, 41 bars) -
Page 20: Care & Maintenance
Care & Maintenance General Care Follow these basic precautions to ensure that your analyzer will perform well for years to come: • Do not push keys with sharp objects • Do not expose the unit to extreme heat, or leave in direct sunlight for extended periods of time. -
Page 21: Cleaning
7. Place battery into the holding tabs in the back half of the case. 8. Replace the back cover and install screws, while taking care not to crush internal cabling. Reinstall boot if desired. If the unit will not be used for several months, remove batteries from the unit. -
Page 22: Calibration
Calibration The unit is calibrated to stated accuracy during manufacturing. The absolute 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: Troubleshooting
Troubleshooting If the unit is not performing properly, please use this troubleshooting chart. Try the listed actions under the appropriate problem, in order from top to bottom until the problem is resolved. If these steps do not correct the problem, please contact the manufacturer for service. Symptom Action No display... - Page 24 Display 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 LCD has dim • Press LCD ↑ to increase contrast contrast • Replace batteries with a fresh set Display visibly • Contact the manufacturer for service cracked Condensation • Allow unit to warm to ambient temperature. inside display • Open battery compartment and allow unit to window dehumidify in a dry or air-conditioned environment for 24 hours.
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Page 26: End-Of-Life Disposal
End-of-Life Disposal Contemporary electronic assemblies such as this unit contain trace amounts of lead, which is harmful to the environment if not properly disposed of. Also, much of the plastic case is recyclable where facilities exist. Digi-Cool Industries supports the proper disposal of this product at the end of its service life. -
Page 27: Warranty
Warranty Digi-Cool Industries Ltd. Limited One Year Warranty What is covered This warranty covers any defects in materials or workmanship in your new analyzer, with the exceptions stated below. How long coverage lasts This warranty lasts for 1 year after purchase date. Coverage terminates if you transfer ownership of the product to another party during the warranty period. - Page 28 Maintenance" sections of this manual for details on for the proper use and parameters of the analyzer. GUYS IF YOU USE YOUR TEMPERATURE SENSORS TO PULL YOUR 4X4 OUT OF AXLE DEEP MUD..WE WON’T WARRANTY THEM! (the sensor leads have been selected as a thin wire so as not to channel heat into the tiny delicate sensor and give your false readings.
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Page 29: Limitation Of Liability
Digi-Cool's obligation under this limited warranty is strictly and exclusively limited to the repair or replacement free of charge of such articles found to be defective in material or workmanship, or to refund the full purchase price upon the return of the defective article, on the condition that the purchaser gives prompt written notice to Digi-Cool of any claim under this warranty period within the two year warranty period and, if requested, returns the defective articles to Digi-Cool. - Page 30 This warranty is governed by and will be construed in accordance with the laws of British Columbia, Canada, without reference 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.
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Page 31: Service And Support
Service and Support If you experience problems with the use of your analyzer, please read the features and troubleshooting sections of this manual. Should your analyzer require service, you may return it to Digi-Cool Industries. Contact Digi-Cool Industries for a return authorization (RA) number. -
Page 32: Return For Service
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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