Gree GWC09AA, Installation And Service Manual

Page: 45 / 136

GREE Service Manual GWC09AA / K5NNA6A Page 45
Gas detection
While servicing the unit it is recommended for the whole period of work — be-
fore, during and after — to monitor the gas concentration in the air within the
work environment. By monitoring the air within the work environment the danger
of a possible formation of flammable atmosphere can be detected early.
During the monitoring, ensure that the gas detectors are suitable for hydrocar-
bon detection. Never use open fire or a device with an ignition source for the
detection of gas or for leak detection.
Before operation of the gas detector the instruction manual must be read care-
fully. In case of any questions refer to the detector manufacturer. Furthermore
ensure the detector is correctly calibrated. Instructions for calibration can be
found in the instruction manual of the detector or upon request from the manu-
facturer. A possible re-calibration must be done within an area which is free of
refrigerants.
In case of a positive detection by the detector any work must be stopped imme-
diately. Any open flames or ignition sources must be extinguished or removed.
In addition to a suitable and approved HC gas detectors, portable gas detectors
can be used.
Such a detector can be clipped to clothing or placed on the floor within the work-
ing area. It should be switched on for the duration of the work, and set to alarm
at 15% of the lower flammability level (LFL), to warn that flammable concentra-
tion may be nearby. In this way, technicians can be alerted whenever an inad-
vertent release of flammable refrigerant occurs, and can immediately act upon
the relevant emergency procedures.
Portable HC Gas Detector
The HC leak de-
tector is indeed
a PPE device!