Toshiba RAS-B10 Series Installation Manual

Also see for RAS-10 series: Owner's manual Owner's manual Installation manual Installation manual Installation manual

ENESFRITDEPTPLCZRUCRHUTRNLGRSVFINODKROBGEELVSKSI790°Incused lineFlare at indoorunit sideFlare at outdoorunit sideFlare nutHalf unionExternallythreaded sideInternallythreaded sideUse a wrench to secure. Use a torque wrench to tighten.ADie PipeCAUTIONRefrigerant Piping Connection1. Cut the pipe with a pipe cutter.2. Insert a are nut into the pipe and are the pipe.• Projection margin in aring : A (Unit : mm)Rigid (clutch type)Imperial (wing nut type)Outer dia. of copper pipe R410AØ6.35 1.5 to 2.0Ø9.52 1.5 to 2.0Ø12.70 2.0 to 2.5Align the centers of the connecting pipes and tighten the are nut as far aspossible with your ngers. Then tighten the nut with a spanner and torquewrench as shown in the gure.Tightening connectionDo not apply excess torque. Otherwise, the nut may crack depending onthe conditions.(Unit : N·m)Outer dia. of copper pipe Tightening torqueØ6.35 mm 14 to 18 (1.4 to 1.8 kgf·m)Ø9.52 mm 33 to 42 (3.3 to 4.2 kgf·m)Ø12.70 mm 50 to 62 (5.0 to 6.2 kgf·m)EvacuatingAfter 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.Outer dia.of copper pipe R410A tool used Conventional toolusedØ6.35 0 to 0.5 1.0 to 1.5Ø9.52 0 to 0.5 1.0 to 1.5Ø12.70 0 to 0.5 1.0 to 1.5• Tightening torque of are pipe connectionsThe operating pressure of R410Ais higher than that of R22 (approx.1.6 times). It is therefore necessaryto rmly tighten the are pipeconnecting sections (which connectthe indoor and outdoor units) up to thespecied tightening torque. Incorrectconnections may cause not only agas leakage, but also damage to therefrigeration cycle.1. How to shape the pipesShape the pipes along the incused line onthe outdoor unit.2. How to t position of the pipesPut the edges of the pipes to the place witha distance of 85 mm from the incused line.Shaping pipesFlaringBe sure to use a vacuum pump with counter- ow prevention function so thatinside oil of the pump does not ow backward into pipes of the air conditionerwhen the pump stops.(If oil inside of the vacuum pump enters the air conditioner, which use R410A,refrigeration cycle trouble may result.)1. Connect the charge hose from the manifold valve to the service port of thepacked 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 25 meters. (15 minutes for 25 meters)(assuming a pump capacity of 27 liters per minute) Then conrm that thecompound 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 pumpPacked valve at liquid sideService port (Valve core (Setting pin))Packed valve at gas sideVacuumpumpVacuum pump adapter forcounter- ow prevention(For R410A only)Charge hose(For R410A only)Handle Hi(Keep full closed)Manifold valvePressure gaugeCompound pressure gaugeHandle LoCharge hose(For R410A only)Connecting pipe–101 kPa(–76 cmHg)CAUTION• KEEP IMPORTANT 5 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.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 mm15.88 mm A = 5 mmAHHexagon wrenchis required.Cap Cap Size(H) TorqueValve RodCapH17 - 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)ServicePort CapH14 8~12 N·m(0.8 to 1.2 kgf·m)H17 14~18 N·m(1.4 to 1.8 kgf·m) Service Port CapValve Rod CapObliquity Roughness Warp