Haier HPU-16CB03 User Manual - Page 29

Installation procedures 3. Piping connection of outdoor unit. Connect the connecting pipe and inlet and outlet liquid pipe according to the piping method. 4.Purging method Discharge the air out of the indoor unit and the refrigerant pipe by vacuumizing According to the Figure shown method, remove the air in indoor unit and connecting pipe. (1) Remove the valve cap of 2-way valve of outdooor unit. (2) Loosen the flare nut connecting to 3-way valve thick pipe 1~1.5 circuit. (3) Use spanner (hexagon spanner) to loosen 2-way valve core 90 . About 15 seconds later, tighten 2-way valve. The air will discharge out from the flare of thick pipe. When there is no air discharge, tighten the flare nut according to the specified torque. (4) Open 2-way valve and 3-way valve. (5) Tighten the valve cap of the two valves. (6) Use leakage detector or soap water to check whether there is leakage. Liquid pipe 6.35mm (1/4") Gas pipe 12.70mm (1/2") 2-way valve 3-way valve 90* Open HPU-16CB03 2-way valve Liquid pipe 9.52mm (3/8") 3-way valve Gas pipe 15.88mm (5/8") HPU-23CB03 Specified torque: Torque Specification Tighten torque N.m Valve core Valve cap 5.Extra charging amount of the refrigerant Note: When lengthen the connecting pipe, firstly use non-system Freon R22 to remove the air in the connecting pipe, then use the above air discharging method to remove the excessive refrigerant. The newly released air conditioner has been charged extra 80g R22 on the base of the previously specified refrigerant amount. This method is only for the first-time installation to remove the air in connecting pipe and indoor unit. When piping is longer than 5 m, charge additional refrigerant specified in this list. Pipe length 5m 10m 15m Refrigerant charge (g) 90 180 27