Movincool Classic Plus 14, Service Manual

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TROUBLESHOOTING AND REPAIR
33
Vertical Down Joint
metal using sand paper and by cleaning
thoroughly with a solvent such as Trichlene.
• USE OF DRY NITROGEN GAS
During brazing, the inside of the pipe under-
goes an oxidative reaction due to the brazing
flame. Introduce dry nitrogen gas (1 liters/
min.; adjust with the flow regulator) through
the pinch-off tube of the refrigerant cycle to
prevent oxidation.
NOTE: Take care not to allow dirt, water, oil, etc. to
enter into the pipe
• VERTICAL JOINT
Heat the whole brazed fitting to a proper
brazing temperature. Bring the brazing filler
metal into contact with the fitting so that the
brazing filler metal starts flowing by itself.
Stop heating the fitting as soon as the
brazing filler metal has flown into the clear-
ance. Since the brazing filler metal flows
easily into the portion heated to a proper
temperature, it is essential to keep the whole
fitting at a proper brazing temperature.
Vertical Up Joint