Checking for Blockage in Air-To-Air Evaporator or Condensers
1. Remove panels to gain access to coil return bends or hairpins.
2. Press SET and then press
3. Start the refrigeration system.
4. Aim the thermometer at coil turn bends/hairpins.
5. Start recording temperature.
6. Take temperature of each return bend/hairpin.
• All evaporator return bends/hairpins should be at or slightly above evaporator saturation temperature from the
pressure/temperature chart.
• All condenser return bend/hairpins should be at or slightly less than condenser saturation temperature.
• If a group of return bends/hairpins do not conform to expected temperatures, that indicates a blocked
or restricted distributor or distributor tube.
OPERATING IR-750 / IR-750-EUR SOFTWARE
System Prerequisites
Recommended configuration
Processor
Operating system
Memory
Monitor
Drive
Input device
Interface
Install IR-750 / IR-750-EUR Software
• Insert the provided CD disk into CD-ROM drive.
• Double-click "IR-750_VX.XX.exe" (X can be 0 to 9 or blank,
indicating the software version)
• The pop-up windows will guide you through the program setup process.
Connecting USB cable to IR-750 / IR-750-EUR Thermometer
/
to select relatively high emissivity for copper tube.
Pentium® 4 or higher with support of all customary operating systems
Microsoft Windows® 2000 / XP / Vista / Win7
512 MB RAM or higher
VGA (1024 x 768)
CD-ROM
Mouse or compatible
USB for data transmission
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