Haier HSU-22HRA03/R2 Installation Manual

Contents

Outdoor unit5.Purging Method:7Push the air out of the indoor unitand piping as followes:(1) Remove the valve cap on 2-wayvalve in outdoor unit.(2) Loosen by 1/2 turn the flare nut ofgas pipe, which is conneted to3-way valve.(3) Loosen 2-way valve by 90 o usinghexagon wrench, and after approx.10 sec tighten it up. Gas comes outthrough flare nut on wide pipe. If nogas is discharged, tighten flare nutwith specified torque.(4) Open 2-way and 3-way valvesusing specified torque.(5) Tighten the caps on the valveswith specified torque.Valve rodValve cap7-920-25Tighten torque N.mWhen connecting pipe exceeds 5 meters, 16g refrigerant shall be addedper exceeding meter. Charge according to the following list.Piping lengthAdditional amount5m 7mNo need 32gDuring this procedure, 50g or 80g (only for 22k )refrigerant will be discharged in piping.(This must be strictly controlled within 90o and 10 sec.)Brand new outdoor unit is charged 50g or 80g (only for 22k ) more refrigerant than regulatedweight. Only for first installation, this extra 50g or 80g (only for 22k ) can be used to purge airin pipes.Note: When extending piping, air inside piping shall be removed by using externalrefrigerant gas, charge according to the following list.10m80g3-way valve2-way valve6.35mm(1/4") 9.52mm(3/8")3-way valve2-way valveHSU-22HRA03/R2HSU-18HRA03/R26.35mm(1/4") 12.7mm(1/2")HSU-12HRA03/R2HSU-09HRA03/R2HSU-07HRA03/R2