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RRDQ220V1
① Setting up as the above drawing.
② Turn Switching Valve (V2) to [PURGE] position.
* Do not turn the valve during operation or Discharge Pressure Gauge may be damaged.
③ Set Auto Shut-off/Manual Mode Setting to [Auto Shut-off] position.
* When using the Auto Shut-off mode, the unit does not starts when Suction Pressure is lower than
atmospheric pressure.
④ Set Power Switch to [ON] position.
Push Start Switch once.
⑤ Turn Suction Valve (V1) slowly to [PURGE] position adjusting Suction Pressure to less than
0.2MPa.
⑥ Close the liquid port of the cylinder when the unit stops automatically.
⑦ Turn Discharge Valve (V3) to [CLOSE] position and close the discharge hose ball valve.
⑧ Set Power Switch to [OFF] position.
⑨ Disconnect the hoses.
* Vapor refrigerant remains in the recycle unit and the hose of the discharge side.
Connect the hose of the discharge side to an evacuated cylinder to recover all refrigerant in the
recycle unit and the hose.
4)Refrigerant Discharge (Purge) Procedure
Operation time
Suction
Discharge
rs.
of
t.
ed
kg
MED
RESOLUTION
Cy Scale
OPEN
Liquid valve
CLOSE
Vapor valve
Cylinder
Manifold
CLOSE
Ball valve
OPEN
Ball valve
Suction Valve
PURGE
Switching Valve
OPEN
Discharge Valve
2
CLOSE
CLOSE
Low
pressure side
High
pressure side
CLOSE
CLOSE
7
0.2MPa
PURGE
5
CLOSE
7
CLOSE
6
OFF
Power
O N
Start
OFF
Power
O N
ON
4
OFF
8
RRDQ220V1
CLOSE
Vapor valve
Liquid valve
CLOSE
CLOSE
Auto Shut-off
2
Auto
Shut-off
Manual
◆ Use safety glasses and leather hand gloves when operating or disconnecting hoses.
If refrigerant gas touches your skin or gets into your eyes, it may cause frostbite or damage your eye
sight.
CAUTION
◆ Adjust Suction Pressure less than 0.2MPa in purging.
Otherwise, it may cause damage on the compressor.
CAUTION
A scale must be used to prevent
overfilling of cylinder.
HOW TO USE