205
●
In order to ensure that the sealing function is not damaged after maintenance or the
sealing material will not lose the effect of preventing the combustible gas leak due to ageing. So
the substitute components should meet the requirements recommended by the air conditioner
manufacturer.
Warning
Before doing the trial operation after finishing the maintenance, it is a must to use a practical leak
detector to inspect the leakage and reliability of ground connection in order to ensure that no
refrigerant leakage and reliable ground connection.
The refrigerant storage tanks should be separately placed in a well-ventilated place at the
temperature ranging from -10℃ to 50℃ and label them with warning labels.
9). Emergency Accident Handling
A maintenance station should establish emergency handling plans. It is necessary to take
appropriate precautionary measures in work. For example, it is prohibited to enter the location with
any kindling material and it is prohibited to wear clothing or shoes which easily produce static.
Handling suggestions when a large amount of combustible refrigerant leaks:
●
It is necessary to immediately operate the ventilating equipment while cutting off other power
supply and evacuating the affected personnel urgently from the location.
●
It is necessary to inform near residents of evacuating for over 20 meters from the
location, make an alarm call, set the emergency area and prohibit irrelevant personnel and
vehicles from approaching.
●
The professional firefighters should wear anti-static clothing to handle the emergency on
the site and cut off the source of leak.
●
It is necessary to use nitrogen for blowing the site, especially the low-lying positions,
clear away the residual combustible refrigerant gas from any area nearby and surrounding the
leak point and use a handheld detector for detection and not clear the alarm until the
concentration of refrigerant is zero.
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