RTAG-400 Trane Chiller Parameters related explanation #chiller#maintenance #operation.

Vaccum procedure RTAG model Trane chiller If there is no refrigerant in the unit, it is necessary to pump the vacuum first and then refill it. The steps are as follows: 1. The electronic expansion valve should be in the open position. 2. Confirm that all power supply of the unit is disconnect and locked. 3. The unit shall complete leak detection first, no leakage is confirmed. 4. Connecting the vacuum hose to service valve on the evaporator and/or liquid line, open the service valve. 5. Start the vacuum pump. Close the service valve and Stop vacuum pump successively when the vacuum gauge is lower than 67Pa. 6. The unit should be left to rest for at least 1 hour after vacuuming, and the pressure rise should not exceed 20 Pa. If the pressure rise exceeds 20Pa, there is still a leak or some moisture in the system, repeat steps 3 to 6 above. 7. Remove the vacuum hose.