Gree GMV-PD100W/NAB-K, Руководство по обслуживанию

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74
DC Inverter Multi
VRF Service Manual
The copper pipe shall not be inserted into the branch pipe too deep.
Copper pipe
Branch pipe
Correct connection
Wrong connection
5.7 Welding of Copper Pipe
5.7.1 Braze welding
Materials for braze welding
There are two kinds of braze welding, soft braze welding and hard braze welding. Hard braze welding is
required in this case.
Selection of braze welding
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Temperature for braze welding:820-860 (copper pipe becomes light red)
5.7.2 Safety acknowledgement before operation
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b. Acknowledgement on work suits(helmets, clothes, safety bags and safety shoes)
c. Description of work location and environment.
d. Job division shall be made. Job content, method and order shall be indicated. Risk prediction activities
shall be performed.
e. “Construction Schedule” shall be worked out.
f. Head of each group shall be assigned
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h. Instructions on how to use electric machinery properly shall be available.
i. Locations marked with “Staff Only” shall be indicated.
j. An application is necessary for use of open flame and shall be reviewed by on-site safety officer for
approval.
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l. Tools shall be sorted and counted. Upon knocking off for the day, tools shall be sorted and counted. If
necessary, the piping system shall be charged with coolant to avoid exhaustion.
6.7.3 Attention
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b. Wear coveralls (cotton for the best), safety shoes, safety helmet, leather gloves, protective goggles and
anti-dust mask.
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d. Gas cylinder shall be handled carefully to prevent leakage.
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f. Good ventilation is necessary to avoid breathe in of harmful gas.
g. Appropriate measures shall be taken if there is a safety problem.
h. Operation on connectors of branch pipes as well as on the surrounding of pipe ends shall be performed
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pipe is prone to be melted to cause leakage.
For example: