Movincool Office Pro 12 / Office Pro 18 / Office Pro 24 Manuale di Servizio Scaricare il pdf (Pagina 57)

Repair Section

57

(4) Use of dry nitrogen gas

• During brazing, the inside of the pipe undergoes an oxidative reaction due to the brazing flame.

Introduce dry nitrogen gas (0.27 gal/min (1 L/min); adjust with the flow regulator) through the

pinch-off tube of the refrigerant.

< NOTE >

Take care not to allow dirt, water, oil, etc. to enter into the pipe.

(5) 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 clearance. 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.

I000564

Burner

45°

Tube

Brazing Filler Metal

Vertical Down Joint

I001725

Burner

45°

Tube

Brazing Filler Metal

Vertical Up Joint

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