Haier HSU-09C12 User Manual - Page 7

Outdoor unit 5.Purging Method: Push the air out of the indoor unit and piping as followes: (1) Remove the valve cap on 2-way valve in outdoor unit. (2) Loosen by 1/2 turn the flare nut of gas pipe, which is conneted to 3-way valve. (3) Loosen 2-way valve by 90o using hexagon wrench, and after approx. 10 sec tighten it up. Gas comes out through flare nut on wide pipe. If no gas is discharged, tighten flare nut with specified torque. (4) Open 2-way and 3-way valves using specified torque. (5) Tighten the caps on the valves with specified torque. Tighten torque N.m Valve rod 7-9 Valve cap 20-25 2-way valve 3-way valve 6.35mm(1/4") 12.7mm(1/2") HSU-18C13 HSU-18CK03 2-way valve 6.35mm(1/4") 9.52mm(3/8") 3-way valve 9.52mm(3/8") 12.7mm(1/2") 15.88mm(5/8") HSU-09C12 HSU-12C12 HSU-09C13 HSU-12C13 HSU-22C13 HSU-24C13 HSU-09C03/Z1 HSU-12C03/Z1 When connecting pipe exceeds 5 meters, 20g or 60g(only for 22k) refrigerant shall be added per exceeding meter . Charge according to the following list. Piping length Additional amount for 9k 12k 18k 5m 7m No need 40g 10m 100g Piping length Additional amount for 22k 24k 5m 7m No need 120g 10m 300g Note: When extending piping, air inside piping shall be removed by using external refrigerant gas, charge according to the following list. Brand new outdoor unit is charged 50g or 80g(only for 22k and 24k unit) more refrigerant than regulated weight. Only for first installation, this extra 50g or 80g(only for 22k and 24k unit) can be used to purge air in pipes. During this procedure, 50g or 80g(only for 22k and 24k unit) refrigerant will be discharged in piping. (This must be strictly controlled within 90o and 10 sec.) 7