YO99-0874-DI-002-18
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5.5.1 Preparation
The separate exhaust port of the lubricating chamber is at the center of the oil trap flange (B) on
the top on the motor-side cover. It is covered with a plug to keep off foreign matter on delivery.
(1) Remove the plug from the separate exhaust port of the lubricating chamber.
(2) Arrange the piping to the separate exhaust port and the inlet port of the lubricating chamber.
CAUTION
The ultimate pressure of the pump for separate evacuation of the lubricating
chamber should be equivalent to that of the fore pump.
5.5.2 Water Piping, Electrical Connection and Lubrication.
Follow the procedure in the “3.3”, “3.5”, “3.6”.
5.5.3 Checking lubricating oil level
Follow the procedure in the “3.3” , “4.1”, “4.2”.
5.5.4 Pumping
(1)
Close the inlet port either by closing the valve above the inlet side of the mechanical
booster pump or by providing a blind flange to the intake port.
(2)
Run the pump for evacuating the lubricating chamber to evacuate the lubricating
chamber of the mechanical booster pump.
Then run the backing pump to evacuate the mechanical booster pump.
Here, make sure that the pressure at the inlet port or exhaust port of the mechanical
booster pump lowers to near the ultimate pressure of the backing pump (13 to 1.3 Pa
with the standard backing pump).
If the pressure does not lower, check the piping for leakage or the backing pump for
defect.
Follow the procedure in the “4.1”, “4.2”.
5.5.5 Checking rotational direction
After completion of evacuation check the rotational direction.
Run the pump for approximately three second while looking through the viewing port.
If the gears rotate in the direction shown in the “Fig. 11”, it is running in the normal direction.
If the rotation is reversed, interchange the two wires of the three input wires to the motor.
If there is a vacuum gauge on the inlet side of the mechanical booster pump, the rotational
direction can be checked by running the mechanical booster pump to see if the pressure lowers.
Follow the procedure in the “4.1”, “4.2”.
Summary of Contents for PRC-003A
Page 10: ...YO99 0874 DI 002 18 ix Fig 1 Warning Label PRC 003A PRC 006A PRC 012A PRC 018A...
Page 24: ...YO99 0874 DI 002 18 8 2 4 Dimensional drawing Fig 3 PRC 003A Dimensional drawing...
Page 25: ...YO99 0874 DI 002 18 9 Fig 4 PRC 006A Dimensional drawing...
Page 26: ...YO99 0874 DI 002 18 10 Fig 5 PRC 012A Dimensional drawing...
Page 27: ...YO99 0874 DI 002 18 11 Fig 6 PRC 018A Dimensional drawing...
Page 57: ...YO99 0874 DI 002 18 41 Fig 15 PRC 006A Optional attachment figure...
Page 58: ...YO99 0874 DI 002 18 42 Fig 16 PRC 012A Optional attachment figure...
Page 59: ...YO99 0874 DI 002 18 43 Fig 17 PRC 018A Optional attachment figure...
Page 76: ......
