Vacuum pump is the key component to maintain the high vacuum degree of the LiBr absorption unit, and the decrease of vacuum degree will cause the attenuation of the cooling capacity, and even lead to the shortening of the service life of the Hope Deepblue LiBr absorption unit due to the corrosion of the inner cavity in serious cases.

1) The special oil specified for the vacuum pump must be used, otherwise it will cause the drainage performance of the pump to decrease, the ultimate vacuum capacity to decrease and lead to the shortening of the service life of the vacuum pump.

2) Regularly change the vacuum pump oil, observe the dirtiness of the oil through the oil level sight glass, and change the oil. Regular oil change can maintain the performance of the pump and prolong the service life of the pump.

3) If the oil level rises, or the oil color is milky, it means that the oil is emulsified, loosen the oil drain bolt at the bottom of the oil tank to release the emulsified oil or water droplets.

4) When the vacuum pump is running, if the pump oil level is lower than the lower line of the red dot of the oil level sight glass, the pump oil should be supplemented immediately until the oil level rises to the upper line of the red dot of the oil level gauge.

5) If the pump has not been started for a long time, the vacuum pump should be started several times before the official start of the vacuum pump, so as to avoid damaging the pump due to excessive load when the pump is started directly.