人妻无码中文字幕免费视频蜜桃,国产在线精品一区二区中文,天天干天天日夜夜操,几个男人扒开腿揉捏花蒂

1. Preparation before operation

First of all, the equipment should be placed in a horizontal, ventilated and dry place, and the suction port of the vacuum unit should be well connected with the system to be pumped. The sealing must be tight, and there should be no leakage point. Check whether the oil level in the vacuum pump and roots pump and the lubricating oil in the oil cup meet the requirements, and connect the power line and grounding wire. Check for other unsafe factors.

2. Start up and operation of operation unit

Turn on the main power switch, and the main power indicator light will be on; put the control mode in the manual or automatic position; press the control power button, and the indicator light will be on (the vacuum pump, booster pump and emergency stop button should be reset, otherwise the control power button can not be connected). If the power phase sequence is wrong, and the yellow indicator light will be on, the phase shall be changed. Turn on the vacuum pump circuit breaker, press the vacuum pump control button, the vacuum pump indicator light is on, and the vacuum pump is running.

Adjust the time delay of booster pump according to the actual situation (through the time relay, the adjustment range is 1-6 minutes). Turn on the circuit breaker of booster pump, press the control button of booster pump, the indicator light of booster pump will be on, and the booster pump will run at the same time. The oil level switch is set in the oil well. When the oil well is filled with vacuum pump oil or transformer oil, the buzzer on the control panel will give an alarm automatically, and the system will be shut down at the same time.

3. Shutdown

Turn off the high vacuum butterfly valve, turn off the mechanical booster pump, turn off the vacuum pump, press the emergency stop button, turn off the control power and turn off the main power circuit breaker. When the control mode is switched to the automatic position through the knob on the control panel, the equipment will automatically control the closing and starting of the vacuum pump and the mechanical booster pump through the preset control point of the vacuum relay.