Install Instructions
10
OPERATING INSTRUCTIONS
This unit detects relative concentrations of refrigerant, the sensor tip must
always be in motion. Keep the unit away from moisture and high voltages.
To detect leakage in a refrigeration system, the system must operate at a
minimum of 50 PSI. Environmental temperatures lower than 59°F (15°C)
may further reduce a system’s operating pressure, causing a leak to be-
come more dicult to detect. In such cases, “No Leak” may be falsely in-
dicated, requiring an alternate diagnostic means.
1. Turn on the unit by pressing and holding for 2 seconds and releasing the
ON/OFF button.
2. Ensure battery is suciently charged for operation by looking at the Bat-
tery Voltage Indicator. If not, please see Battery Charging Instructions.
3. The unit takes approximately 30 seconds to warm up and calibrate after
the ON/OFF button has been pressed. Keep the LDIR150 away from any
areas of potential refrigerant leakage until the warm-up and calibration
period is over. If there is an error, replace the filter. See Filter Replace-
ment on page 9 for instructions. To avoid false indications, allow the
LDIR150 to fully warm-up before using. The unit is actively reading when
the bar chart is displayed.
4. Press MUTE button to disable audible indication if desired, when audio
indication is enabled, a paced beep will be emitted.
5. After the unit has warmed up, select desired sensitivity by pressing the
SENS button.
6. Slowly move the probe (approximately 3”/sec or 75 mm/sec) at a dis-
tance of 0.25” (0.63 mm) from the suspected leak area. A closer probe
position and slower “sweep” will usually raise the probability of finding
leaks. Once the device indicates a change in concentration, note the
location and keep the tip moving past the potential leak to refresh the
air as this device measures changes in concentration and moving to
“cleaner” air will help detect leaks.
7. Return the tip back to, and past, the first location. When the device indi-
cates a second change, note that location. The source of the leak will be
near the midpoint between the two noted locations.