Haier HSU-12LEA13-W 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 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 5m No need 9k 12k 18k 7m 40g 10m 100g Piping length Additional amount for 22k 24k 5m 7m No need 120g 10m 300g 2-way valve 6.35mm(1/4") 3-way valve 9.52mm(3/8") HSU-09LEA13-F HSU-09LEA13-W HSU-12LEA13-W 2-way valve 3-way valve 6.35mm(1/4") 12.7mm(1/2") HSU-12LEA13-F HSU-18LEA13-W 2-way valve 3-way valve 9.52mm(3/8") 15.88mm(5/8") HSU-22LEA13-W HSU-24LEA13-W Indoor unit A Outdoor unit B A Outdoor unit B Indoor unit Max.Elevation: for 09K 12K: B=5m for 18K 22K: B=10m Max. Length: for 09K : A=7m for 12K: A=10m for 18K 22K: A=20m Outdoor unit A B Oil trap C Indoor unit CAUTION In case more than 5 metresˈoil trap C should be installed every 5~7m. 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(22k) more refrigerant than regulatedweight. Only for first installation, this extra 50g or 80g(22k) can be used to purge air in pipes. During this procedure, 50g or 80g(22k) refrigerant will be discharged in piping. (This must be strictly controlled within 90o and 10 sec.) 7