6. DETECTION METHOD:
As for the detection method, please see Figure 4
6.1. Visually exam the refrigeration system. The oily and dirty spots, node valves, coils, connectors, or pipelines
are the areas most likely to leak gases.
6.2. Start leak detecting at the joint at a speed of 1cm /s and the distance between sensor tip and the joint should be
1-3 cm.
6.3. When an alarm is triggered, it may indicate that the leakage is close by. Detect around that area again and see
if the alarm is repeatable. If a leak is confirmed, pinpoint the leak source by moving slowly from no-leaking
(no-alarm) area to the leaking area from different directions.
Besides, you could also pinpoint the leakage by moving the detector away from the leaking area and reset the
unit, adjusting the sensitivity lower and repeating the above process.
Once confirmed, mark around the leakage and continue detecting the whole line of the system.
6.4. Additional work may be needed to eliminate possible ambiguity, such as, other contaminants at the spot may
also make the detector work abnormally. Please clean the leaking area with dry cloth and blow clean dry air to
the leaking area and repeat step 3 above to confirm the leak.
6.5. Leak on evaporator coil is more difficult to detect than other areas because it is difficult for sensor tip to access
to the whole evaporator coil. Most evaporator coils are composed of modules and are installed in a closed
space with fan for heat exchange.
The system with the fan should be turned on for 10 seconds and then turn off the fan, wait 10-15 minutes at the
evaporator, then use detector to detect the outlet of the condensate (make sure the sensor tip doesn’t touch with
the condensate),or detect the air inside the evaporator chamber.
Most halogens are lighter than the air and likely to accumulate at the highest spot in the closed space.
An alarm may indicate a leak at the evaporator coil, but it is hard to repair evaporator by pinpointing the precise leak
location. In most cases, the whole coil has to be replaced.
SLD-300 LEAK DETECTOR OWNER'S MANUAL
13
SALVADOR ESCODA S.A.
®
Provença, 392 pl. 1 y 2
08025 BARCELONA
Tel. 93 446 27 80
Fax 93 456 90 32
CATÁLOGO TÉCNICO
www.salvadorescoda.com
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