305.3 Precautions When Doing Riser Piping WorkNO2: Connection of drain elbowNO3: Connection of horizontal pipe When unifying multiple drain pipes, install the pipes as shown below. Select converging drainpipes whose gauge is suitable for the operating capacity of the unit.(take the cassette type unit forexample) Make sure that heat insulation work is executed on the following 2 spots to prevent any possiblewater leakage due to dew condensation.a) Connect the drain hose to the drain raiser pipe, and insulate them.b) Connect the drain hose to the drain outlet on the indoor unit, and tighten it with the clamp.Multi Variable Air Conditioners Indoor Unit104NO2: Connection of drain elbowNO3: Connection of horizontal pipe◆ When unifying multiple drain pipes, install the pipes as shown below. Select converging drainpipes whose gauge is suitable for the operating capacity of the unit.(take the cassette type unit forexample)5.3 Precautions When Doing Riser Piping Work◆Make sure that heat insulation work is executed on the following 2 spots to prevent any possiblewater leakage due to dew condensation.a) Connect the drain hose to the drain raiser pipe, and insulate them.b) Connect the drain hose to the drain outlet on the indoor unit, and tighten it with the clamp.Multi Variable Air Conditioners Indoor Unit104NO2: Connection of drain elbowNO3: Connection of horizontal pipe◆ When unifying multiple drain pipes, install the pipes as shown below. Select converging drainpipes whose gauge is suitable for the operating capacity of the unit.(take the cassette type unit forexample)5.3 Precautions When Doing Riser Piping Work◆Make sure that heat insulation work is executed on the following 2 spots to prevent any possiblewater leakage due to dew condensation.a) Connect the drain hose to the drain raiser pipe, and insulate them.b) Connect the drain hose to the drain outlet on the indoor unit, and tighten it with the clamp.Multi Variable Air Conditioners Indoor Unit104NO2: Connection of drain elbowNO3: Connection of horizontal pipe◆ When unifying multiple drain pipes, install the pipes as shown below. Select converging drainpipes whose gauge is suitable for the operating capacity of the unit.(take the cassette type unit forexample)5.3 Precautions When Doing Riser Piping Work◆Make sure that heat insulation work is executed on the following 2 spots to prevent any possiblewater leakage due to dew condensation.a) Connect the drain hose to the drain raiser pipe, and insulate them.b) Connect the drain hose to the drain outlet on the indoor unit, and tighten it with the clamp.