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Summary of Contents for Autool LM120 Plus
- Page 1 AUTOOL LM120+ Digital Manifold Gauge User Manual www.autooltech.com...
- Page 2 AUTOOL, our company and its branches will not be liable to any cost caused by these conditions. Formal statement: The other product names mentioned in this manual are used to explain how to use this device, and the registered trademark still belongs to the original mark owner.
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Page 3: Safety Rules And Precautions
1.Overview Intelligent electronic refrigerant group instrument is an auxiliary instrument for the installation, testing and maintenance of refrigeration equipment such as air conditioners and cold storage. The instrument has double pressure test, dual temperature test, digital readout, multi- unit switching, multi-mode function and built-in refrigerant database. -
Page 4: International Electrical Symbols
4) The maximum operating pressure of standard hose is 600 PSI ( approximate 4.13 Mpa, 41.3 bar ). The limit pressure is 3000 PSI approximate 20.68 Mpa, 206.8 bar ). 5) Please confirm the rated pressure value of the tested equipment before testing. - Page 5 Vacuum test: relative vacuum Vacuum test unit: Kpa; Mpa; bar; inHg; PSI. Vacuum test range: -101 Kpa – 0 Kpa Vacuum test resolution: 1 Kpa Temperature test unit: °C (Celsius), °F (Fahrenheit) Temperature test range: -40°C–150°C (-40°F–302°F) Temperature test resolution: 0.1°C (-40°C–99.9°C), 1°C (100°C–150°C) 0.1°F (-40°F–99.9°F), 1°F (100°F–302°F) Temperature test accuracy: +/- 0.5 °C + 2dgt...
- Page 6 5.Product Icon and description 1) Clamp-on temperature probe socket. 2) Clamp-on temperature probe socket. 3) LCD display. 4) Run/Stop button: In Leak Test Mode, Test Control Button. 5) Function button: test function mode switch button. 6) R+/R-Refrigerant Type Selection Buttons: Switch to select different types of working refrigerants.
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Page 7: Function Instructions
6.Function instructions 6.1 Refrigerant filling and pressure inspection A. Turn off the blue valve and red valve. B. Power on the instrument. Then make sure if the LCD displays pressure test status as below picture. If not, press the Function button to switch it. C. - Page 8 G. Turn on the refrigerant valve and gently press the pressure release valve to vent the air in the connecting hose. H. When the refrigeration system stops, turn on the high pressure valve (red valve) and fill with a certain amount of refrigerant and then shut the valve quickly.
- Page 9 Please make sure clamp-on temperature probes are connected as step F and contacted fully to the refrigeration pipes. ◆ The instrument can calculate the SH - Superheat and SC - Subcooling as shown below as long as the tested refrigerant is preset and clamp-on temperature probes are connected well.
- Page 10 E. Connect the instrument to the refrigeration system according to the chart below. (pay attention to the direction of the refrigerant flowing!!!!! ) (Connected clamp-on temperature probes will not affect the operation..) returns to zero. F. Turn on the blue valve and red valve, and start the vacuum pump. G.
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Page 11: Common Problems
At this time, the lower left corner records the initial pressure value; the lower right corner shows the instantaneous pressure value; the “ΔP” display area shows the difference between initial pressure value and instantaneous pressure value. The time display area shows how long the leak test lasts in the format of Hour : Minute (HH:MM). - Page 12 The instrument refrigerant inlet (the middle port of the instrument ) has a port with valve core , which is used to vent the air in the hoes after connecting the refrigerant to the instrument. The port is equipped with a copper plug screw. It is required to tighten it every time before or after operation.
- Page 13 Sensible heat and latent heat The amount of heat required to raise the water temperature from 0 degrees to 100 degrees is sensible heat, the water is heated to 100 degrees, and the hot water becomes water vapor, but the temperature is still 100 degrees. The heat required for this process is called latent heat.
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Page 14: After-Sale Service
We are always trying to offer an accurate user manual, but we can hardly guarantee that there is absolutely no difference. The right of the final interpretation of the products belongs to AUTOOL, and we will not be liable to any loss or damage caused by misunderstanding.
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