Toshiba RAS-B07 Installation Manual

R32 or R410A refrigeration cycle trouble may result.)Packed valve at liquid sideService port (Valve core (Setting pin))Packed valve at gas sideVacuumpumpVacuum pump adapter forcounter-flow preventionCharge hoseHandle High(Keep full closed)Manifold valvePressure gaugeCompound pressure gaugeHandle LowCharge hoseConnecting pipe–101 kPa(–76 cmHg)CAUTION KEEP IMPORTANT 7 POINTS FOR PIPING WORK.(1) Take away dust and moisture (inside of the connecting pipes).(2) Tighten the connections (between pipes and unit).(3) Evacuate the air in the connecting pipes using a VACUUM PUMP.(4) Check gas leak (connected points).(5) Be sure to fully open the packed valves before operation.(6) Reusable mechanical connectors and flared joints are not allowedindoors. When mechanical connectors are reused indoors, sealingparts shall be renewed. When flared joints are reused indoors, theflare part shall be refabricated.(7) Don’t operate air conditioner in case no refrigerant in the system.Packed valve handling precautions Open the valve stem all the way out, but do not try to open it beyond thestopper. Securely tighten the valve cap with torque in the following table:Pipe size of Packed Valve Size of Hexagon wrench12.70 mm and smallers A = 4 mmmm5=Amm88.51Cap Cap Size (H) TorqueValve Rod CapH17 - H19 14~18 N·m(1.4 to 1.8 kgf·m)H22 - H30 33~42 N·m(3.3 to 4.2 kgf·m)Service Port CapH14 8~12 N·m(0.8 to 1.2 kgf·m)H17 14~18 N·m(1.4 to 1.8 kgf·m)AHHexagon wrenchis required.Service Port CapValve Rod CapEvacuatingAfter the piping has been connected to the indoor unit, you can perform theair purge together at once.AIR PURGEEvacuate the air in the connecting pipes and in the indoor unit using avacuum pump. Do not use the refrigerant in the outdoor unit.For details, see the manual of the vacuum pump.Be sure to use a vacuum pump with counter-flow prevention function sothat inside oil of the pump does not flow backward into pipes of the airconditioner when the pump stops.(If oil inside of the vacuum pump enters the air conditioner, which use1. Connect the charge hose from the manifold valve to the service port ofthe packed valve at gas side.2. Connect the charge hose to the port of the vacuum pump.3. Open fully the low pressure side handle of the gauge manifold valve.4. Operate the vacuum pump to start evacuating. Perform evacuating forabout 15 minutes if the piping length is 20 meters. (15 minutes for20 meters) (assuming a pump capacity of 27 liters per minute)Then confirm that the compound pressure gauge reading is –101 kPa(–76 cmHg).5. Close the low pressure side valve handle of the gauge manifold valve.6. Open fully the valve stem of the packed valves (both gas and liquid sides).7. Remove the charging hose from the service port.8. Securely tighten the caps on the packed valves.Using a vacuum pumpCAUTIONShould be check the compressor operating condition while pumpingdown process. It must not any abnormal sound, more vibration.It is abnormal condition appears and must turn off the Air Conditionerimmediately.Pump down process1. Turn off the Air Conditioner system.2. Connect the charge hose from the manifold valve to the service port ofthe packed valve at gas side.3. Turn on the Air Conditioner system in cooling operation more than10 minutes.4. Check the operating pressure of the system should be normal value.(Ref. with product specification)5. Release the valve rod cap of both service valves.6. Use the Hexagon wrench to turning the valve rod of Liquid side fullyclose. (*Make sure no entering air into the system)7. Continue operate Air Conditioner system until and the gauge of manifolddropped into the range of 0.5 - 0 kgf/cm²8. Use the Hexagon wrench to turning the valve rod of Gas side fully close.And turn off the Air Conditioner system immediately thereafter.9. Remove the gauge manifold from the service port of the packed valve.10. Securely tighten the valve rod cap to the both service valves.11