Verification after the end of all electrical work
Selecting the diameter of the collective tube
Calculate the amount of water drained, based on the number of indoor units that will be connected to the collective drain pipe, and then select the pipe diameter. Calculate 2 liters / hour per horsepower of drained water produced by an indoor unit.
• It is assumed that the proportion of the area inside the tube is 0.1.
Number of units internal diameter (mm) allowed volume (1/100 level difference)
30 units 31 88 liters per hour
40 units 40 175 liters per hour
50 units 51 334 liters per hour
• The table above is for a horizontal tube.
