McQuay MDS030AR Applications Manual page 82

Design & installation Guide For McQuay MDS Multi System
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The EXV must be installed vertically
To indoor unit
4.3.2 Refrigerant Piping Assembly Process
install the indoor unit
Sequence
welding blow
Three principle of the refrigerant piping assembly
Dry
Clean
No air leakage
Three principle of the refrigerant pipe
Dry
no moisture
The throttle is installed vertically
cut the piping required
air leakage test dry
Piping assembly
Nitrogen charging
Piping assembly
Use the right material such as copper and welding rod
Abide by the welding process
Abide by the flare fitting process
Clean
no dust
EXV
To outdoor unit
install the pipe
Processing method
air blow dry
air blow
air leakage test
No air leakage
No refrigerant leakage
nitrogen charging