4.
Additional work may be needed to eliminate possible ambiguity, like other contaminants at the spot may make the
detector alarm, 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.
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. Ana alarm may indicate a leak at the
evaporator coil, but is hard to repair evaporator by pinpointing the precise leak location. In most cases, the whole coil
has to be replaced.
Notes before leak detecting:
1.
In order to detect leak in a refrigeration system, the system must have normal operating pressure, or at least
partially reaches to minimum 50 PSI. Low environmental temperature (lower than 59°F or 15°C) may lower the
system required pressure and may make the leak less likely to be detected. No leak detected does not mean the
system does not have gas leak. Check the pressure before making the conclusion.
2.
Leaking areas are usually covered with contaminants such as compressor oil or dirt, be careful not to let the sensor
tip in contact with these contaminants.
3.
The detector’s function is to detect halogen’s relative change a the sensor tip. Pinpointing the leak source needs to
manually adjust the sensitivity and reset the detector by the technician. You could follow recommendations below:
(1)
In areas where the atmosphere is contaminated with halogen refrigerant, press reset key to “ignore” the leak in
the background. Make sure not move the sensor tip away from the contaminated background while resetting the
detector.
(2)
In windy area, the leaked halogen refrigerant may be quickly diluted or removed from leak source. The
technician may use a wind shield to isolate the leak area or temporarily torn off the fan.
(3)
To avoid false alarm, prevent the sensor tip against touching any moisture or other solvent.
Maintenance
Maintenance
Proper maintenance is important and may extend the service life and improve the performance of your detector.
Warning: Turn the power off before replacing the sensor tip. Voltage across the tip may pose an electrical hazard.
Keep the sensor tip clean: Use cotton cloth or dry air to clean the shield on the sensor tip if it gets contaminated. If the
sensor tip itself is contaminated, soak the tip in absolute alcohol for a few minutes, and then use compressed air to blow it
dry, or dry it with cloth.
Note: Never use strong solvents such as Gasoline, mineral oil, turpentine, these solvents may coat the sensor with a thin film
and reduce the sensitivity of the detector and make the detector slow to respond to a leak.
Put the detector and the tip in a dry and clean place; remove the batteries if the detector is not used for a long time.
Troubleshooting
Troubleshooting
Symptom
Possible reasons
Solution
The detector could not turn on
A) The energy of batteries is too low to
turn on.
B) The pole piece of battery connector
has been oxidized.
A) Please replace new batteries.
B) Please scrape the oxidization layer.
6
MGF
MGF
srl –– Via Chico Mendes, 8 – 43058 Sorbolo Mezzani (PR) Italy – Tel. +39 0521-818301 Fax: +39 0521-818202
e-mail: [email protected] –
–