Samsung AM CNBD Series Installation Manual

18Refrigerant pipe installationRefrigerant pipe work on DVM Hydro unitWet clothGas pipeLiquid pipe• Caution for brazing the pipe to a DVM Hydro unit- When brazing the pipe to the product, the unit may get damaged by the heat and flame from brazing Use aflame proofing cloth to protect the unit from a brazing fire or flame- Wrap the pipe with a wet cloth and braze it as shown in the illustration Also, water dripping from the wet clothmay interrupt the brazing so make sure the water does not drip from the wet cloth- Make sure that connected pipes of DVM Hydro unit and the outdoor unit do not interrupt each other or makecontact with the product (Vibration may cause damage to the pipes )- When removing the sealed pipe on the bottom side of the service valve, cut it with a pipe cutter first and thenstart the brazing When the sealed pipe is brazed without cutting, you may get injured by the refrigerant withinthe pipeCAUTION1 Remove the copper cap of the refrigerant pipe and eliminate the sludge or foreign substances on the brazed part andthen braze the connecting pipe on each port- Since nitrogen gas is sealed within the pipe, you must discharge the nitrogen gas from the liquid pipe Then remove thecopper cap and check for existence of the nitrogen gas- Check the pressure of the nitrogen gas before brazing If the nitrogen gas is not being purged, product is not normal sodo not install itGas sideCopper capLiquid side2 Cover the refrigerant pipe well with insulation- It prevents the water, on the outer surface of the pipe, from dripping and increase the efficiency of the DVM Hydro unit3 Cut off the leftover insulator4 Check for cracks on the bent part of the pipes5 When the DVM Hydro unit is installed in a hot and humid place, water may form on the outer surface of the insulation soit would be necessary to double the insulation thickness [10 mm (0 4 inch) or more]