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Dc Inverter VRF plus Water Heater Solution Service Manual INSTALLATION
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When braze welding is to be performed underneath, a simple support shall be built, such as two
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ladders.
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Braze welding shall be easy to operate downward or in transverse direction. In upward
operation, brazing filler metal is prone to fall so that high skills are required.
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Cooling
To avoid getting a burn in following processes, common wet cloth (humidity content is low,
meaning that there shall not be water drips when welded part is cooled; and because shrinkage
factor of copper is different from that of welding material, too quick cooling that would cause
cracking of braze welding shall be avoided) can be used for cooling welded parts.
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The following items shall be checked after welding is completed
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Is there any pore or hole on welded part?
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Is there evident “sagging of brazing filler metal”?
10.8 Cleaning of Refrigerant Piping
Solder
Weld torch
Transverse
Upward
Downward
Solder
Solder
Weld torch
Weld torch