Toshiba RAS-05E2KVG-TR - Evacuating

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Evacuating
Afterthepipinghasbeenconnectedtotheindoorunit,youcanperformthe
air purge together at once.
AIR PURGE
Evacuate the air in the connecting pipes and in the indoor unit using
a vacuum 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-owpreventionfunctionso
thatinsideoilofthepumpdoesnotowbackwardintopipesoftheair
conditioner when the pump stops.
(Ifoilinsideofthevacuumpumpenterstheairconditioner,whichuseR32,
refrigeration cycle trouble may result.)
1. Connect the charge hose from the manifold valve to the service port of
the 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 for
about 15 minutes if the piping length is 20 meters. (15 minutes for
20 meters) (assuming a pump capacity of 27 liters per minute)
 Thenconrm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 pump
Compound pressure gauge Pressure gauge
Manifold valve
Handle Low
Charge hose
Handle High
(Keep full closed)
Charge hose
Packed valve at gas side
Service port (Valve core (Setting pin))
Connecting pipe
Vacuum pump adapter for
counter-owprevention
Packed valve at liquid side
Vacuum
pump
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aredjointsarenotallowed
   indoors.Whenmechanicalconnectorsarereusedindoors,sealing
   partsshallberenewed.Whenaredjointsarereusedindoors,the
   arepartshallberefabricated.
(7) Don’t operate air conditioner in case no refrigerant in the system.
–101kPa
(–76cmHg)
• Openthevalvestemallthewayout,butdonottrytoopenitbeyondthe
stopper.
Pipe size of Packed Valve Size of Hexagon wrench
12.70 mm and smallers A = 4 mm
15.88 mm A = 5 mm
1. Turno󰀨theAirConditionersystem.
2. Connect the charge hose from the manifold valve to the service port of
the packed valve at gas side.
3. Turn on the Air Conditioner system in cooling operation more than
10 minutes.
4. Check the operating pressure of the system should be normal value.
 (Ref.withproductspecication)
5. Release the valve rod cap of both service valves.
6. Use the Hexagon wrench to turning the valve rod of Liquid side fully close.
(*Make sure no entering air into the system)
7. Continue operate Air Conditioner system until and the gauge of manifold
dropped into the range of 0.5 - 0 kgf/cm
2
8. Use the Hexagon wrench to turning the valve rod of Gas side fully close.
 Andturno󰀨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.
• Securely tighten the valve cap with torque in the following table:
Cap Cap Size (H) Torque
Valve Rod Cap
H17 - 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 Cap
H14
8~12N·m
(0.8to1.2kgf·m)
H17
14~18N·m
(1.4to1.8kgf·m)
Packed valve handling precautions
Pump down process
Hexagon wrench
is required.
Service Port Cap
Valve Rod Cap
CAUTION
Should be check the compressor operating condition while pumping
 downprocess.Itmustnotanyabnormalsound,morevibration.Itis
 abnormalconditionappearsandmustturno󰀨theAirConditioner
immediately.
1144180111-00_S04_182x257_40p_S_p70_220321.indd 12 22/03/21 8:19:38 AM