12
2. Brazing
DANGER
Risk of Fire or Explosion Flammable Refrigerant Used
• Servicing shall be done by factory authorized service personnel to minimize the risk of
possible ignition due to incorrect parts or improper service.
WARNING
• Wear appropriate personal protective equipment (PPE) when servicing the appliance.
• You must have a combustible gas leak detector in the immediate work area at all times.
• You must have a chemical fire extinguisher available at all times.
• Notify all persons in the immediate area that you are working with a flammable refrigerant.
• Do not use silver alloy or copper alloy containing arsenic.
• Be sure the area is clear of refrigerant vapor before brazing.
1) Braze/repair/replace damaged component or fitting.
2) Purge with nitrogen gas for 2 min. Then braze all fittings while purging with nitrogen gas
flowing at a pressure of 0.02 to 0.03 MPa.
NOTICE
• Always install a new drier every time the sealed refrigeration system is opened.
• Do not replace the drier until after all other repair or replacement has been made. Install
the new drier with the arrow on the drier in the direction of the refrigerant flow.
• When brazing, protect the drier by using a wet cloth to prevent the drier from overheating.
Do not allow the drier to exceed 121°C.
3) Use soap bubbles to check for leaks. Raise the pressure using nitrogen gas (1 MPa). Do
not use any refrigerant as a mixture with pressurized air for leak testing.
4) Once leak checking is complete, release the nitrogen gas from the system.
Summary of Contents for HNC-120BE-L-BH
Page 22: ...21 VI Technical Information A Dimensions Specifications 1 HNC 120BE L BLH...
Page 23: ...22 2 HNC 150BE L BLH...
Page 24: ...23 3 HNC 180BE L BLH...
Page 25: ...24 4 HNC 210BE L BLH...
Page 26: ...25 5 HNC 120BE R BLH...
Page 27: ...26 6 HNC 150BE R BLH...
Page 28: ...27 7 HNC 180BE R BLH...
Page 29: ...28 8 HNC 210BE R BLH...
Page 30: ...29 9 HNC 120BE L BH...
Page 31: ...30 10 HNC 150BE L BH...
Page 32: ...31 11 HNC 180BE L BH...
Page 33: ...32 12 HNC 210BE L BH...
Page 34: ...33 13 HNC 120BE R BH...
Page 35: ...34 14 HNC 150BE R BH...
Page 36: ...35 15 HNC 180BE R BH...
Page 37: ...36 16 HNC 210BE R BH...
